166. AC emitter resistance equals 25 mV divided by the—

1. 1. Quiescent base current

   
   
   

   2. DC emitter current

   
   
   

   3. AC emitter current

   
   
   

   4. Change in collector current

   
   
   

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1. View Hint View Answer Discuss in Forum

   The AC emitter resistance,
   

   Ye =	VT
   	IE

   
   

   or Ye =	25 mV
   	IE

   
   Where, Y_e = AC emitter resistance
   I_E = DC emitter current
   

   Correct Option: B

   The AC emitter resistance,
   

   Ye =	VT
   	IE

   
   

   or Ye =	25 mV
   	IE

   
   Where, Y_e = AC emitter resistance
   I_E = DC emitter current
   

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167. The ac equivalent circuit is derived from the original circuit by shorting all—

1. 1. Resistors

   
   
   

   2. Capacitors

   
   
   

   3. Inductors

   
   
   

   4. Transistors

   
   
   

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1. View Hint View Answer Discuss in Forum

   The ac equivalent circuit is derived from the original circuit by shorting all capacitors.

   Correct Option: B

   The ac equivalent circuit is derived from the original circuit by shorting all capacitors.

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168. Reducing all dc sources to zero is one of the steps in getting the—

1. 1. dc equivalent circuit

   
   
   

   2. ac equivalent circuit

   
   
   

   3. complete amplifier circuit

   
   
   

   4. voltage divider biasing circuit

   
   
   

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1. View Hint View Answer Discuss in Forum

   Reducing all dc sources to zero is one of the steps in getting the ac equivalent circuit.

   Correct Option: B

   Reducing all dc sources to zero is one of the steps in getting the ac equivalent circuit.

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169. The capacitors of a CE amplifier appear to be—

1. 1. Open to ac

   
   
   

   2. Shorted to dc

   
   
   

   3. Open to supply voltage

   
   
   

   4. Shorted to ac

   
   
   

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1. View Hint View Answer Discuss in Forum

   The capacitors of a CE amplifier appear to be shorted to ac.

   Correct Option: D

   The capacitors of a CE amplifier appear to be shorted to ac.

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170. The capacitor that produces an ac ground is called a—

1. 1. By pass capacitor

   
   
   

   2. Coupling capacitor

   
   
   

   3. DC open

   
   
   

   4. AC open

   
   
   

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1. View Hint View Answer Discuss in Forum

   The capacitor that produces an ac ground is called a By Pass capacitor.

   Correct Option: A

   The capacitor that produces an ac ground is called a By Pass capacitor.

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