Multistage Transistor Amplifiers

1. __________ coupling provides the maximum voltage gain

1. RC
2. Transformer
3. Direct
4. Impedance

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2. 1 db corresponds to __________ change in power level

1. 50%
2. 35%
3. 26%
4. 22%

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3. 1 db corresponds to __________ change in voltage or current level

1. 40%
2. 80%
3. 20%
4. 25%

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4. A current amplification of 2000 is a gain of __________

1. 3 db
2. 66 db
3. 20 db
4. 200 db

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5. A gain of 1,000,000 times in power is expressed by __________

1. 30 db
2. 60 db
3. 120 db
4. 600 db

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6. A gain of 1000 times in voltage is expressed by __________

1. 60 db
2. 30 db
3. 120 db
4. 600 db

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7. A radio receiver has __________ of amplification

1. One stage
2. Two stages
3. Three stages
4. More than one stages

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8. An advantage of RC coupling scheme is the __________

1. Good impedance matching
2. Economy
3. High efficiency
4. None of the above

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9. An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?

1. 8 db
2. 6 db
3. 5 db
4. 4 db

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10. If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is __________

1. 600 db
2. 24 db
3. 14 db
4. 27 db

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