Electronic Circuits

1. A buffer amplifier is used for

1. Maximum loading and minimum mismatch
2. Minimum loading and minimum mismatch
3. Maximum loading and maximum mismatch
4. Minimum loading and maximum mismatch

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2. A class A power amplifier is otherwise known as

1. Single ended amplifier
2. Darlington amplifier
3. Symmetrical amplifier
4. Differential amplifier

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3. A class A power amplifier uses _________ transistor(s).

1. Two
2. One
3. Three
4. Four

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4. A common emitter circuit is also called _________ circuit.

1. Grounded emitter
2. Grounded collector
3. Grounded base
4. Emitter follower

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5. A complementary-symmetry amplifier has

1. One PNP and one NPN transistor
2. Two PNP transistors
3. Two NPN transistors
4. Two PNP and two NPN transistors

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6. A dc voltage supply provides 60V when the output is unloaded. When connected to a load the output drops to 56V. Calculate the value of the voltage regulation.

1. 8.1%
2. 7.1%
3. 5%
4. 12%

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7. A feedback circuit is _________ frequency

1. Independent of
2. Strongly dependent on
3. Moderately dependent on
4. Relatively dependent on

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8. A multistage amplifier uses at least how many transistors?

1. One
2. Three
3. Four
4. Two

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9. A pair of filter common on high fidelity system which separate audio frequency band signals into two separate groups, where one is fed to the tweeter and the other to the woofer is called

1. Equalizer
2. Synthesizer
3. Cross over network
4. Hybrid

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10. A pulsating dc applied to power amplifiers causes

1. Burning of transistor
2. Hum in the circuit
3. Excessive forward voltage
4. Excessive reverse voltage

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