Electronics & Communication Engineering - Electronics Devices and Circuits

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43.

Which of the following is (are) true to achieve a good overall voltage gain for the circuit?                        
A. The effect of Rsand RLmust be considered as a product B. The effect of Rsand RLmust be considered as a product and evaluated individually
C. The effect of Rsand RLmust be evaluated individually D. None of the above



44.

To analyze the common-emitter amplifier, what must be done to determine the dc equivalent circuit?                        
A. leave circuit unchanged B. replace coupling and bypass capacitors with opens
C. replace coupling and bypass capacitors with shorts D. replace VCCwith ground



45.

For the common-emitter amplifier ac equivalent circuit, all capacitors are                        
A. effectively shorts B. effectively open circuits
C. not connected to ground D. connected to ground




46.

Under which of the following conditions is the output impedance of the network approximately equal to RC for a common-emitter fixed-bias configuration?                        
A. ro ≥Â10RC B. ro< 10RC
C. ro< ro D. ro> ro



47.

Which of the following gains is less than 1 for a common-base configuration?                        
A. Ai B. Av
C. Ap D. None of the above



48.

Which of the following define(s) the conversion efficiency?                        
A. Ac power to the load/ac input power B. Ac power to the load/dc power supplied
C. Dc output power/ac input power D. All of the above



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