Question – 1
1. ___________ allows electric current to pass through it.
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A. An insulator
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B. Wood
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C. A Conductor
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D. None of the above
- Answer:C
- Answer Explanation:
Question – 2
2. When temperature rises, the resistance of a semi-conductor ___________.
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A. Increases
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B. Decreases
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C. Remains constant
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D. Increases in the beginning and then gradually decreases.
- Answer:B
- Answer Explanation:
Question – 3
3. In order to reduce the voltage, a __________ is used.
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A. diode
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B. rectifier
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C. step-up transformer
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D. step-down transformer
- Answer:D
- Answer Explanation:
Question – 4
4. __________ is a method in which impurities are introduced into the crystal structure of silicon.
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A. Lithography
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B. Fabrication
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C. Doping
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D. Enhancing
- Answer:C
- Answer Explanation:
Question – 5
5. A __________ converts electrical energy into sound energy.
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A. loudspeaker
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B. transmitter
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C. receiver
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D. none of the above
- Answer:A
- Answer Explanation:
Question – 6
6. The process of conversion of liquid into gas is called as _________.
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A. condensation
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B. sublimation
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C. melting
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D. vaporization
- Answer:D
- Answer Explanation:
Question – 7
7. ___________ is used to measure electric power.
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A. Volt
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B. Watt
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C. Ampere
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D. Ohm
- Answer:B
- Answer Explanation:
Question – 8
8. Electrical charge can be stored using _________.
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A. resistors
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B. diodes
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C. transistors
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D. capacitors
- Answer:D
- Answer Explanation:
Question – 9
9. Which among the following is used for initiating a circuit action?
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A. Trigger
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B. Transformer
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C. Voltmeter
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D. Capacitor
- Answer:A
- Answer Explanation:
Question – 10
10. Alternating Current is changed to Direct Current using ________.
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A. an ammeter
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B. a rectifier
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C. a terminal
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D. None of the above
- Answer:B
- Answer Explanation:
Question – 11
11. Two electrical wires of thickness 6mm and 3mm are connected to a machine. The larger wire requires _______ voltage so that the two wires carry the same current.
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A. more
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B. less
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C. constant
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D. no
- Answer:B
- Answer Explanation:
Question – 12
12. A 20-ohm resistor and a 50-ohm resistor are connected in series. The total resistance is
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A. 30 ohms
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B. 50 ohms
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C. 70 ohms
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D. 20 ohms
- Answer:C
- Answer Explanation:
Question – 13
13. __________ is produced by a photovoltaic cell.
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A. DC
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B. AC
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C. Both A and B
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D. No current
- Answer:A
- Answer Explanation:
Question – 14
14. The current flowing through a circuit is 6A and the voltage is 2V. What will be its resistance?
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A. 3 ohms
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B. 12 ohms
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C. 4 ohms
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D. 0.3 ohms
- Answer:D
- Answer Explanation:
Question – 15
15. __________ is used for measuring current.
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A. Wattmeter
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B. Voltmeter
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C. Ammeter
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D. Ohmmeter
- Answer:C
- Answer Explanation: