Question – 1
1. Which of the following time constant is considered for a capacitor to be fully charged?
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A. Second
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B. Third
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C. Fourth
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D. Fifth
- Answer:D
- Answer Explanation:
Question – 2
2. A diode under normal conditions conducts current when it is _________.
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A. Forward biased
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B. Avalanched
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C. Reverse biased
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D. Inducted
- Answer:A
- Answer Explanation:
Question – 3
3. An adjustable voltage divider is a potentiometer application which is also known as ____________.
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A. Current control
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B. Voltage control
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C. Resistance control
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D. Volume control
- Answer:D
- Answer Explanation:
Question – 4
4. When the forward current through a silicon diode increases, the internal resistance ______.
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A. decreases
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B. increases
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C. remains the same
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D. increases initially and then decreases
- Answer:A
- Answer Explanation:
Question – 5
5. Find the voltage required for 40A to flow through a 70 k?? resistance?
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A. 2.8 KV
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B. 2800 V
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C. 2.8 MV
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D. 28 KV
- Answer:C
- Answer Explanation:
Question – 6
6. Which of the following is considered to be a capacitor’s rate of charge?
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A. A circuit block
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B. Exponential
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C. Linear
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D. Parallel
- Answer:B
- Answer Explanation:
Question – 7
7. What would be the result if the series current doubles?
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A. Voltage is reduced
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B. Resistance is halved
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C. Voltage is doubled
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D. Resistance is doubled
- Answer:B
- Answer Explanation:
Question – 8
8. __________ is the function performed by a diode.
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A. Amplifier
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B. Rectifier
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C. Inverter
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D. Emitter
- Answer:B
- Answer Explanation:
Question – 9
9. The two main applications for an alternating current are __________.
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A. Power and information
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B. Static and dynamic
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C. Magnetic and electric
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D. None of the above
- Answer:A
- Answer Explanation:
Question – 10
10. The unit of electrical resistance is __________.
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A. Volt
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B. Amp
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C. Hertz
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D. Ohm
- Answer:D
- Answer Explanation:
Question – 11
11. __________ is a device used to convert direct current to alternating current.
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A. Oscillator
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B. Rectifier
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C. Diode
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D. Insulator
- Answer:A
- Answer Explanation:
Question – 12
12. A coil that consumes the electrical energy stores it in the form of _________.
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A. An electric field
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B. A magnetic field
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C. An electromotive field
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D. An electrostatic field
- Answer:B
- Answer Explanation:
Question – 13
13. The process of increasing the number of turns of wire on the secondary of a transformer results in __________.
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A. an increase in the primary current
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B. an increase in the secondary current
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C. a decrease in the secondary current
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D. no change
- Answer:C
- Answer Explanation:
Question – 14
14. In which of the following are the zener diodes commonly used?
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A. Current limiting circuits
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B. Oscillator circuits
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C. Amplifier circuits
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D. Power supply circuits
- Answer:D
- Answer Explanation:
Question – 15
15. What is the frequency of the second harmonic of 70 Hz?
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A. 70 Hz
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B. 35 Hz
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C. 140 Hz
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D. 490 Hz
- Answer:C
- Answer Explanation: