Transistor Biasing

1. A silicon transistor is biased with base resistor method. If β=100, VBE =0.7 V, zero signal collector current IC = 1 mA and VCC = 6V, what is the value of the base resistor RB?

1. 105 kO
2. 530 kO
3. 315 kO
4. None of the above

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2. An ideal value of stability factor is __________..

1. 100
2. 200
3. More than 200
4. 1

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3. For faithful amplification by a transistor circuit, the value of VBE should __________ for a silicon transistor

1. Be zero
2. Be 0.01 V
3. Not fall below 0.7 V
4. Be between 0 V and 0.1 V

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4. For faithful amplification by a transistor circuit, the value of VCE should __________ for silicon transistor

1. Not fall below 1 V
2. Be zero
3. Be 0.2 V
4. None of the above

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5. For germanium transistor amplifier, VCE should __________ for faithful amplification

1. Be zero
2. Be 0.2 V
3. Not fall below 0.7 V
4. None of the above

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6. For good stabilsation in voltage divider bias, the current I1 flowing through R1 and R2 should be equal to or greater than

1. 10 IB
2. 3 IB
3. 2 IB
4. 4 IB

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7. For proper amplification by a transistor circuit, the operating point should be located at the __________ of the d.c. load line

1. The end point
2. Middle
3. The maximum current point
4. None of the above

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8. For proper operation of the transistor, its collector should have __________

1. Proper forward bias
2. Proper reverse bias
3. Very small size
4. None of the above

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9. If biasing is not done in an amplifier circuit, it results in __________

1. Decrease in the base current
2. Unfaithful amplification
3. Excessive collector bias
4. None of the above

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10. If the maximum collector current due to signal alone is 3 mA, then zero signal collector current should be at least equal to __________

1. 6 mA
2. mA
3. 3 mA
4. 1 mA

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