Question

In a common-base amplifier the load-resistance of the output circuit is  and the resistance of the input circuit is . If current-gain be 0.95, calculate the voltage-gain and the power gain.

Solution

Correct option is

 

The a-c voltage gain in a common-base amplifier is given by

         

           

           

           

           = 1900. 

The a-c power gain is   

         

         .

SIMILAR QUESTIONS

Q1

When the p-end of the p-n junction is connected to the negative terminal of the battery and the n-end to the positive terminal of the battery, then thep-n junction behaves like :   

Q2

n-type semiconductor is formed :

Q3

An n-type and a p-type silicon can be obtained by doping pure silicon with : 

Q4

An n-type semiconductor is :

Q5

The drift current in a p-n junction is :

Q6

The diffusion current in a p-n junction is 

Q7

In a p-n-p transistor with normal bias:

Q8

The base-current of a transistor is  and the collector-current is 2.05 mA. A change of  in the base-current produces a change of 0.65 mA in the collector current. Find .  

Q9

The current-gain of a transistor in a common-base arrangement is 0.98. Find the change in collector-current corresponding to a change of 5.0 mA in emitter-current. What would be the change in the base-current?

Q10

In input and output resistances in a common-base amplifier circuit are  respectively. If the current-gain  is 0.98, then find the voltage gain. If the emitter-current is 2 mA, then find the collector-current and the base-current.