Ohm’s Law Questions and Answers pdf [Quiz]: we will discuss chapter Ohm’s Law from subject Electrical Engineering.
What is Ohm’s Law?
Ohm’s Law is a fundamental principle in electrical engineering and physics that relates the current flowing through a conductor to the voltage applied across it and the resistance of the conductor. It states that the current (I) flowing through a conductor is directly proportional to the voltage (V) across it and inversely proportional to the resistance (R) of the conductor.
V = I * R
Where:
V is the voltage across the conductor, measured in volts (V)
I is the current flowing through the conductor, measured in amperes (A)
R is the resistance of the conductor, measured in ohms (Ω)
According to Ohm’s Law, if the resistance of a conductor remains constant, increasing the voltage across it will result in an increased current flow, and vice versa. Similarly, if the voltage remains constant, increasing the resistance will result in a decreased current flow.
Ohm’s Law is named after the German physicist Georg Simon Ohm, who formulated the law in the early 19th century. It is a fundamental concept used in the analysis and design of electrical circuits and is essential for understanding and calculating various aspects of electric current, voltage, and resistance.
Ohm’s Law Questions and Answers | Ohms Law Quiz
1. Which of the following is a renewable source of energy?
a) Coal
b) Natural gas
c) Solar power
d) Nuclear power
Answer: c) Solar power
2. What is the SI unit of electric current?
a) Watt
b) Ampere
c) Ohm
d) Volt
Answer: b) Ampere
3. Which color wire is typically used as the ground wire in electrical installations?
a) Red
b) Yellow
c) Green
d) Blue
Answer: c) Green
4. Which of the following is a conductor of electricity?
a) Rubber
b) Glass
c) Copper
d) Plastic
Answer: c) Copper
5. What does the acronym AC stand for in AC power?
a) Alternating Current
b) Alternating Charge
c) Active Current
d) Active Charge
Answer: a) Alternating Current
6. Which device is used to measure electric current?
a) Voltmeter
b) Ammeter
c) Multimeter
d) Ohmmeter
Answer: b) Ammeter
7. The resistance of a conductor depends on which of the following?
a) Current
b) Voltage
c) Length of the conductor
d) All of the above
Answer: d) All of the above
8. Which type of circuit has only one path for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: a) Series circuit
9. Which law states that the total resistance in a parallel circuit is equal to the reciprocal of the sum of the individual resistances?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Joule’s Law
d) Ohm’s Law of Combining Resistances
Answer: d) Ohm’s Law of Combining Resistances
10. Which component in a circuit stores electrical energy in an electrostatic field?
a) Capacitor
b) Inductor
c) Resistor
d) Diode
Answer: a) Capacitor
ohm’s law questions and answers pdf class 10 | ohm’s law questions and answers pdf
11. What is the unit of electrical power?
a) Watt
b) Ampere
c) Volt
d) Ohm
Answer: a) Watt
12. Which of the following is a semiconductor material?
a) Copper
b) Aluminum
c) Silicon
d) Iron
Answer: c) Silicon
13. What does the term “DC” stand for in DC power?
a) Direct Current
b) Dual Current
c) Dynamic Current
d) Direct Charge
Answer: a) Direct Current
14. Which component allows current to flow in only one direction?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: c) Diode
15. What does the term “LED” stand for?
a) Long Emission Diode
b) Light Emitting Diode
c) Low Energy Device
d) Light Emitting Detector
Answer: b) Light Emitting Diode
16. What is the purpose of a fuse in an electrical circuit?
a) To regulate voltage
b) To store electrical energy
c) To interrupt current flow in case of overload
d) To increase resistance
Answer: c) To interrupt current flow in case of overload
17. Which of the following is a unit of electric potential difference?
a) Ampere
b) Ohm
c) Volt
d) Watt
Answer: c) Volt
18. Which law states that the potential difference across a conductor is directly proportional to the current flowing through it, given constant temperature?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: a) Ohm’s Law
19. Which of the following is an example of a non-renewable energy source?
a) Wind power
b) Solar power
c) Natural gas
d) Biomass
Answer: c) Natural gas
20. What is the SI unit of resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
21. Which of the following is a renewable source of energy?
a) Coal
b) Natural gas
c) Solar power
d) Nuclear power
Answer: c) Solar power
22. What is the SI unit of electric current?
a) Watt
b) Ampere
c) Ohm
d) Volt
Answer: b) Ampere
23. Which color wire is typically used as the ground wire in electrical installations?
a) Red
b) Yellow
c) Green
d) Blue
Answer: c) Green
24. Which of the following is a conductor of electricity?
a) Rubber
b) Glass
c) Copper
d) Plastic
Answer: c) Copper
25. What does the acronym AC stand for in AC power?
a) Alternating Current
b) Alternating Charge
c) Active Current
d) Active Charge
Answer: a) Alternating Current
26. Which device is used to measure electric current?
a) Voltmeter
b) Ammeter
c) Multimeter
d) Ohmmeter
Answer: b) Ammeter
27. The resistance of a conductor depends on which of the following?
a) Current
b) Voltage
c) Length of the conductor
d) All of the above
Answer: d) All of the above
28. Which type of circuit has only one path for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: a) Series circuit
29. Which law states that the total resistance in a parallel circuit is equal to the reciprocal of the sum of the individual resistances?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Joule’s Law
d) Ohm’s Law of Combining Resistances
Answer: d) Ohm’s Law of Combining Resistances
30. Which component in a circuit stores electrical energy in an electrostatic field?
a) Capacitor
b) Inductor
c) Resistor
d) Diode
Answer: a) Capacitor
ohm’s law test questions | ohms law multiple choice questions pdf
31. What is the unit of electrical power?
a) Watt
b) Ampere
c) Volt
d) Ohm
Answer: a) Watt
32. Which of the following is a semiconductor material?
a) Copper
b) Aluminum
c) Silicon
d) Iron
Answer: c) Silicon
33. What does the term “DC” stand for in DC power?
a) Direct Current
b) Dual Current
c) Dynamic Current
d) Direct Charge
Answer: a) Direct Current
34. Which component allows current to flow in only one direction?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: c) Diode
35. What does the term “LED” stand for?
a) Long Emission Diode
b) Light Emitting Diode
c) Low Energy Device
d) Light Emitting Detector
Answer: b) Light Emitting Diode
36. What is the purpose of a fuse in an electrical circuit?
a) To regulate voltage
b) To store electrical energy
c) To interrupt current flow in case of overload
d) To increase resistance
Answer: c) To interrupt current flow in case of overload
37. Which of the following is a unit of electric potential difference?
a) Ampere
b) Ohm
c) Volt
d) Watt
Answer: c) Volt
38. Which law states that the potential difference across a conductor is directly proportional to the current flowing through it, given constant temperature?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: a) Ohm’s Law
39. Which of the following is an example of a non-renewable energy source?
a) Wind power
b) Solar power
c) Natural gas
d) Biomass
Answer: c) Natural gas
40. What is the SI unit of resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
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41. Which of the following is a unit of electric charge?
a) Joule
b) Coulomb
c) Newton
d) Henry
Answer: b) Coulomb
42. What does the term “AC” stand for in AC power?
a) Alternating Current
b) Active Charge
c) Amperage Control
d) Automatic Circuit
Answer: a) Alternating Current
43. Which type of circuit has multiple paths for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: b) Parallel circuit
44. Which of the following is used to measure electric potential difference?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Galvanometer
Answer: b) Voltmeter
45. What is the unit of electrical resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
46. Which of the following materials is a good insulator?
a) Copper
b) Aluminum
c) Rubber
d) Silver
Answer: c) Rubber
47. What does the term “PWM” stand for in electronics?
a) Pulse Width Modulation
b) Power Wire Management
c) Positive Waveform Mode
d) Programmable Watt Meter
Answer: a) Pulse Width Modulation
48. Which component is used to store electric charge in a circuit?
a) Resistor
b) Capacitor
c) Inductor
d) Transformer
Answer: b) Capacitor
49. What is the purpose of a diode in an electrical circuit?
a) To increase resistance
b) To store electrical energy
c) To control the flow of current in one direction
d) To regulate voltage
Answer: c) To control the flow of current in one direction
50. Which of the following devices converts electrical energy into mechanical motion?
a) Transistor
b) Resistor
c) Motor
d) Capacitor
Answer: c) Motor
51. What is the unit of electric power?
a) Watt
b) Volt
c) Ampere
d) Ohm
Answer: a) Watt
52. Which of the following is a semiconductor material?
a) Copper
b) Aluminum
c) Silicon
d) Iron
Answer: c) Silicon
53. What does the term “DC” stand for in DC power?
a) Direct Current
b) Dual Current
c) Dynamic Current
d) Direct Charge
Answer: a) Direct Current
54. Which component allows current to flow in only one direction?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: c) Diode
55. What does the term “LED” stand for?
a) Long Emission Diode
b) Light Emitting Diode
c) Low Energy Device
d) Light Emitting Detector
Answer: b) Light Emitting Diode
56. What is the purpose of a fuse in an electrical circuit?
a) To regulate voltage
b) To store electrical energy
c) To interrupt current flow in case of overload
d) To increase resistance
Answer: c) To interrupt current flow in case of overload
57. Which law states that the potential difference across a conductor is directly proportional to the current flowing through it, given constant temperature?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: a) Ohm’s Law
58. Which of the following is an example of a non-renewable energy source?
a) Wind power
b) Solar power
c) Natural gas
d) Biomass
Answer: c) Natural gas
59. What is the SI unit of resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
60. Which of the following is used to measure electric charge?
a) Joule
b) Coulomb
c) Newton
d) Henry
Answer: b) Coulomb
61. What does the term “AC” stand for in AC power?
a) Alternating Current
b) Active Charge
c) Amperage Control
d) Automatic Circuit
Answer: a) Alternating Current
62. Which type of circuit has multiple paths for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: b) Parallel circuit
63. Which of the following is used to measure electric potential difference?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Galvanometer
Answer: b) Voltmeter
64. What is the unit of electrical resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
65. Which of the following materials is a good insulator?
a) Copper
b) Aluminum
c) Rubber
d) Silver
Answer: c) Rubber
66. What does the term “PWM” stand for in electronics?
a) Pulse Width Modulation
b) Power Wire Management
c) Positive Waveform Mode
d) Programmable Watt Meter
Answer: a) Pulse Width Modulation
67. Which component is used to amplify or switch electronic signals?
a) Resistor
b) Capacitor
c) Transistor
d) Inductor
Answer: c) Transistor
68. What is the unit of frequency?
a) Hertz
b) Watt
c) Ohm
d) Ampere
Answer: a) Hertz
69. Which of the following is the primary function of a capacitor in an electrical circuit?
a) To store electrical charge
b) To regulate voltage
c) To increase current flow
d) To control resistance
Answer: a) To store electrical charge
70. What is the purpose of a resistor in an electrical circuit?
a) To store energy
b) To generate electricity
c) To limit the flow of current
d) To measure voltage
Answer: c) To limit the flow of current
71. Which of the following is a passive electronic component?
a) Diode
b) Transformer
c) Battery
d) Transistor
Answer: a) Diode
72. What does the term “EMF” stand for in physics?
a) Electric Magnetic Field
b) Electromagnetic Force
c) Electric Motion Frequency
d) Electromotive Force
Answer: d) Electromotive Force
73. Which of the following is a type of magnetic storage device?
a) CD-ROM
b) USB flash drive
c) Hard disk drive
d) Solid-state drive
Answer: c) Hard disk drive
74. What is the function of a relay in an electrical circuit?
a) To convert AC to DC
b) To amplify audio signals
c) To control the flow of current
d) To generate electromagnetic waves
Answer: c) To control the flow of current
75. Which of the following is a characteristic of a parallel circuit?
a) The total resistance is equal to the sum of the individual resistances.
b) The total current is divided among the branches.
c) The voltage across each component is the same.
d) All of the above
Answer: d) All of the above
76. Which of the following is used to measure the intensity of sound?
a) Ammeter
b) Voltmeter
c) Decibel meter
d) Wattmeter
Answer: c) Decibel meter
78. What is the purpose of a ground wire in an electrical circuit?
a) To provide electrical insulation
b) To carry current back to the source in case of a fault
c) To increase the voltage
d) To store electrical energy
Answer: b) To carry current back to the source in case of a fault
79. Which law states that the sum of currents entering a junction is equal to the sum of currents leaving the junction?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: b) Kirchhoff’s Law
80. What does the term “AC/DC” refer to in the context of music?
a) Alternating Current/Direct Current
b) Audio Cassette/Digital Compact Disc
c) Australian rock band
d) Analog Converter/Digital Converter
Answer: c) Australian rock band
81. Which of the following is an active component in electronics?
a) Resistor
b) Capacitor
c) Transistor
d) Inductor
Answer: c) Transistor
82. What is the unit of electric charge?
a) Volt
b) Ampere
c) Coulomb
d) Ohm
Answer: c) Coulomb
83. Which of the following is used to measure the flow of electrons in a circuit?
a) Voltmeter
b) Ammeter
c) Ohmmeter
d) Wattmeter
Answer: b) Ammeter
84. What does the term “VLSI” stand for in electronics?
a) Very Long Signal Integration
b) Variable Logic System Integration
c) Voltage Level Synchronization Interface
d) Very Large Scale Integration
Answer: d) Very Large Scale Integration
85. Which of the following is a common unit for expressing electrical resistance?
a) Volt
b) Ampere
c) Ohm
d) Watt
Answer: c) Ohm
What is Ohm’s Law?
Ohm’s Law is a fundamental principle in electrical engineering and physics that relates the current flowing through a conductor to the voltage applied across it and the resistance of the conductor. It states that the current (I) flowing through a conductor is directly proportional to the voltage (V) across it and inversely proportional to the resistance (R) of the conductor.
V = I * R
Where:
V is the voltage across the conductor, measured in volts (V)
I is the current flowing through the conductor, measured in amperes (A)
R is the resistance of the conductor, measured in ohms (Ω)
According to Ohm’s Law, if the resistance of a conductor remains constant, increasing the voltage across it will result in an increased current flow, and vice versa. Similarly, if the voltage remains constant, increasing the resistance will result in a decreased current flow.
Ohm’s Law is named after the German physicist Georg Simon Ohm, who formulated the law in the early 19th century. It is a fundamental concept used in the analysis and design of electrical circuits and is essential for understanding and calculating various aspects of electric current, voltage, and resistance.
1. Which of the following is a renewable source of energy?
a) Coal
b) Natural gas
c) Solar power
d) Nuclear power
Answer: c) Solar power
2. What is the SI unit of electric current?
a) Watt
b) Ampere
c) Ohm
d) Volt
Answer: b) Ampere
3. Which color wire is typically used as the ground wire in electrical installations?
a) Red
b) Yellow
c) Green
d) Blue
Answer: c) Green
4. Which of the following is a conductor of electricity?
a) Rubber
b) Glass
c) Copper
d) Plastic
Answer: c) Copper
5. What does the acronym AC stand for in AC power?
a) Alternating Current
b) Alternating Charge
c) Active Current
d) Active Charge
Answer: a) Alternating Current
6. Which device is used to measure electric current?
a) Voltmeter
b) Ammeter
c) Multimeter
d) Ohmmeter
Answer: b) Ammeter
7. The resistance of a conductor depends on which of the following?
a) Current
b) Voltage
c) Length of the conductor
d) All of the above
Answer: d) All of the above
8. Which type of circuit has only one path for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: a) Series circuit
9. Which law states that the total resistance in a parallel circuit is equal to the reciprocal of the sum of the individual resistances?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Joule’s Law
d) Ohm’s Law of Combining Resistances
Answer: d) Ohm’s Law of Combining Resistances
10. Which component in a circuit stores electrical energy in an electrostatic field?
a) Capacitor
b) Inductor
c) Resistor
d) Diode
Answer: a) Capacitor
11. What is the unit of electrical power?
a) Watt
b) Ampere
c) Volt
d) Ohm
Answer: a) Watt
12. Which of the following is a semiconductor material?
a) Copper
b) Aluminum
c) Silicon
d) Iron
Answer: c) Silicon
13. What does the term “DC” stand for in DC power?
a) Direct Current
b) Dual Current
c) Dynamic Current
d) Direct Charge
Answer: a) Direct Current
14. Which component allows current to flow in only one direction?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: c) Diode
15. What does the term “LED” stand for?
a) Long Emission Diode
b) Light Emitting Diode
c) Low Energy Device
d) Light Emitting Detector
Answer: b) Light Emitting Diode
16. What is the purpose of a fuse in an electrical circuit?
a) To regulate voltage
b) To store electrical energy
c) To interrupt current flow in case of overload
d) To increase resistance
Answer: c) To interrupt current flow in case of overload
17. Which of the following is a unit of electric potential difference?
a) Ampere
b) Ohm
c) Volt
d) Watt
Answer: c) Volt
18. Which law states that the potential difference across a conductor is directly proportional to the current flowing through it, given constant temperature?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: a) Ohm’s Law
19. Which of the following is an example of a non-renewable energy source?
a) Wind power
b) Solar power
c) Natural gas
d) Biomass
Answer: c) Natural gas
20. What is the SI unit of resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
21. Which of the following is a renewable source of energy?
a) Coal
b) Natural gas
c) Solar power
d) Nuclear power
Answer: c) Solar power
22. What is the SI unit of electric current?
a) Watt
b) Ampere
c) Ohm
d) Volt
Answer: b) Ampere
23. Which color wire is typically used as the ground wire in electrical installations?
a) Red
b) Yellow
c) Green
d) Blue
Answer: c) Green
24. Which of the following is a conductor of electricity?
a) Rubber
b) Glass
c) Copper
d) Plastic
Answer: c) Copper
25. What does the acronym AC stand for in AC power?
a) Alternating Current
b) Alternating Charge
c) Active Current
d) Active Charge
Answer: a) Alternating Current
26. Which device is used to measure electric current?
a) Voltmeter
b) Ammeter
c) Multimeter
d) Ohmmeter
Answer: b) Ammeter
27. The resistance of a conductor depends on which of the following?
a) Current
b) Voltage
c) Length of the conductor
d) All of the above
Answer: d) All of the above
28. Which type of circuit has only one path for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: a) Series circuit
29. Which law states that the total resistance in a parallel circuit is equal to the reciprocal of the sum of the individual resistances?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Joule’s Law
d) Ohm’s Law of Combining Resistances
Answer: d) Ohm’s Law of Combining Resistances
30. Which component in a circuit stores electrical energy in an electrostatic field?
a) Capacitor
b) Inductor
c) Resistor
d) Diode
Answer: a) Capacitor
31. What is the unit of electrical power?
a) Watt
b) Ampere
c) Volt
d) Ohm
Answer: a) Watt
32. Which of the following is a semiconductor material?
a) Copper
b) Aluminum
c) Silicon
d) Iron
Answer: c) Silicon
33. What does the term “DC” stand for in DC power?
a) Direct Current
b) Dual Current
c) Dynamic Current
d) Direct Charge
Answer: a) Direct Current
34. Which component allows current to flow in only one direction?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: c) Diode
35. What does the term “LED” stand for?
a) Long Emission Diode
b) Light Emitting Diode
c) Low Energy Device
d) Light Emitting Detector
Answer: b) Light Emitting Diode
36. What is the purpose of a fuse in an electrical circuit?
a) To regulate voltage
b) To store electrical energy
c) To interrupt current flow in case of overload
d) To increase resistance
Answer: c) To interrupt current flow in case of overload
37. Which of the following is a unit of electric potential difference?
a) Ampere
b) Ohm
c) Volt
d) Watt
Answer: c) Volt
38. Which law states that the potential difference across a conductor is directly proportional to the current flowing through it, given constant temperature?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: a) Ohm’s Law
39. Which of the following is an example of a non-renewable energy source?
a) Wind power
b) Solar power
c) Natural gas
d) Biomass
Answer: c) Natural gas
40. What is the SI unit of resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
41. Which of the following is a unit of electric charge?
a) Joule
b) Coulomb
c) Newton
d) Henry
Answer: b) Coulomb
42. What does the term “AC” stand for in AC power?
a) Alternating Current
b) Active Charge
c) Amperage Control
d) Automatic Circuit
Answer: a) Alternating Current
43. Which type of circuit has multiple paths for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: b) Parallel circuit
44. Which of the following is used to measure electric potential difference?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Galvanometer
Answer: b) Voltmeter
45. What is the unit of electrical resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
46. Which of the following materials is a good insulator?
a) Copper
b) Aluminum
c) Rubber
d) Silver
Answer: c) Rubber
47. What does the term “PWM” stand for in electronics?
a) Pulse Width Modulation
b) Power Wire Management
c) Positive Waveform Mode
d) Programmable Watt Meter
Answer: a) Pulse Width Modulation
48. Which component is used to store electric charge in a circuit?
a) Resistor
b) Capacitor
c) Inductor
d) Transformer
Answer: b) Capacitor
49. What is the purpose of a diode in an electrical circuit?
a) To increase resistance
b) To store electrical energy
c) To control the flow of current in one direction
d) To regulate voltage
Answer: c) To control the flow of current in one direction
50. Which of the following devices converts electrical energy into mechanical motion?
a) Transistor
b) Resistor
c) Motor
d) Capacitor
Answer: c) Motor
51. What is the unit of electric power?
a) Watt
b) Volt
c) Ampere
d) Ohm
Answer: a) Watt
52. Which of the following is a semiconductor material?
a) Copper
b) Aluminum
c) Silicon
d) Iron
Answer: c) Silicon
53. What does the term “DC” stand for in DC power?
a) Direct Current
b) Dual Current
c) Dynamic Current
d) Direct Charge
Answer: a) Direct Current
54. Which component allows current to flow in only one direction?
a) Resistor
b) Capacitor
c) Diode
d) Transistor
Answer: c) Diode
55. What does the term “LED” stand for?
a) Long Emission Diode
b) Light Emitting Diode
c) Low Energy Device
d) Light Emitting Detector
Answer: b) Light Emitting Diode
56. What is the purpose of a fuse in an electrical circuit?
a) To regulate voltage
b) To store electrical energy
c) To interrupt current flow in case of overload
d) To increase resistance
Answer: c) To interrupt current flow in case of overload
57. Which law states that the potential difference across a conductor is directly proportional to the current flowing through it, given constant temperature?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: a) Ohm’s Law
58. Which of the following is an example of a non-renewable energy source?
a) Wind power
b) Solar power
c) Natural gas
d) Biomass
Answer: c) Natural gas
59. What is the SI unit of resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
60. Which of the following is used to measure electric charge?
a) Joule
b) Coulomb
c) Newton
d) Henry
Answer: b) Coulomb
61. What does the term “AC” stand for in AC power?
a) Alternating Current
b) Active Charge
c) Amperage Control
d) Automatic Circuit
Answer: a) Alternating Current
62. Which type of circuit has multiple paths for current to flow?
a) Series circuit
b) Parallel circuit
c) Combination circuit
d) Complex circuit
Answer: b) Parallel circuit
63. Which of the following is used to measure electric potential difference?
a) Ammeter
b) Voltmeter
c) Ohmmeter
d) Galvanometer
Answer: b) Voltmeter
64. What is the unit of electrical resistance?
a) Ampere
b) Volt
c) Ohm
d) Watt
Answer: c) Ohm
65. Which of the following materials is a good insulator?
a) Copper
b) Aluminum
c) Rubber
d) Silver
Answer: c) Rubber
66. What does the term “PWM” stand for in electronics?
a) Pulse Width Modulation
b) Power Wire Management
c) Positive Waveform Mode
d) Programmable Watt Meter
Answer: a) Pulse Width Modulation
67. Which component is used to amplify or switch electronic signals?
a) Resistor
b) Capacitor
c) Transistor
d) Inductor
Answer: c) Transistor
68. What is the unit of frequency?
a) Hertz
b) Watt
c) Ohm
d) Ampere
Answer: a) Hertz
69. Which of the following is the primary function of a capacitor in an electrical circuit?
a) To store electrical charge
b) To regulate voltage
c) To increase current flow
d) To control resistance
Answer: a) To store electrical charge
70. What is the purpose of a resistor in an electrical circuit?
a) To store energy
b) To generate electricity
c) To limit the flow of current
d) To measure voltage
Answer: c) To limit the flow of current
71. Which of the following is a passive electronic component?
a) Diode
b) Transformer
c) Battery
d) Transistor
Answer: a) Diode
72. What does the term “EMF” stand for in physics?
a) Electric Magnetic Field
b) Electromagnetic Force
c) Electric Motion Frequency
d) Electromotive Force
Answer: d) Electromotive Force
73. Which of the following is a type of magnetic storage device?
a) CD-ROM
b) USB flash drive
c) Hard disk drive
d) Solid-state drive
Answer: c) Hard disk drive
74. What is the function of a relay in an electrical circuit?
a) To convert AC to DC
b) To amplify audio signals
c) To control the flow of current
d) To generate electromagnetic waves
Answer: c) To control the flow of current
75. Which of the following is a characteristic of a parallel circuit?
a) The total resistance is equal to the sum of the individual resistances.
b) The total current is divided among the branches.
c) The voltage across each component is the same.
d) All of the above
Answer: d) All of the above
76. Which of the following is used to measure the intensity of sound?
a) Ammeter
b) Voltmeter
c) Decibel meter
d) Wattmeter
Answer: c) Decibel meter
78. What is the purpose of a ground wire in an electrical circuit?
a) To provide electrical insulation
b) To carry current back to the source in case of a fault
c) To increase the voltage
d) To store electrical energy
Answer: b) To carry current back to the source in case of a fault
79. Which law states that the sum of currents entering a junction is equal to the sum of currents leaving the junction?
a) Ohm’s Law
b) Kirchhoff’s Law
c) Faraday’s Law
d) Newton’s Law
Answer: b) Kirchhoff’s Law
80. What does the term “AC/DC” refer to in the context of music?
a) Alternating Current/Direct Current
b) Audio Cassette/Digital Compact Disc
c) Australian rock band
d) Analog Converter/Digital Converter
Answer: c) Australian rock band
81. Which of the following is an active component in electronics?
a) Resistor
b) Capacitor
c) Transistor
d) Inductor
Answer: c) Transistor
82. What is the unit of electric charge?
a) Volt
b) Ampere
c) Coulomb
d) Ohm
Answer: c) Coulomb
83. Which of the following is used to measure the flow of electrons in a circuit?
a) Voltmeter
b) Ammeter
c) Ohmmeter
d) Wattmeter
Answer: b) Ammeter
84. What does the term “VLSI” stand for in electronics?
a) Very Long Signal Integration
b) Variable Logic System Integration
c) Voltage Level Synchronization Interface
d) Very Large Scale Integration
Answer: d) Very Large Scale Integration
85. Which of the following is a common unit for expressing electrical resistance?
a) Volt
b) Ampere
c) Ohm
d) Watt
Answer: c) Ohm