Question

For a common base transistor circuit, the emitter-current and the collector-current are 1 mA and 0.96 mA respectively. Calculate the current gain and base current.

Solution

Correct option is

0.96, 0.04 mA

By definition, the direct current gain  is given by 

         

                          

                        = 0.96. 

The base-current is emitter-current – collector-current. Thus 

                   

                            

                        = 0.04 mA.

SIMILAR QUESTIONS

Q1

The depletion layer in the p-n junction is formed by

Q2

When a forward bias is applied to a p-n junction, it :

Q3

The resistance of a forward-biased p-n junction is :

Q4

When a semiconductor device is connected with a battery and a resistance in series, a current flows in the circuit. The current almost vanishes if the polarity of the battery is reversed. The device may be :

Q5

The circuit contains two diodes, each with a forward resistance of  and with infinite backward resistance. If the battery voltage is 6 V, the current through the  resistance is  

                                                                        

Q6

Two identical p-n junction may be connected in series with a battery in three ways. The potential drops across the two p-n junction are equal in :

                                

Q7

In case of p-n junction diode at high reverse-bias, the current rises sharply. The value of reverse bias is known as : 

Q8

A junction diode can be used for :

Q9

p-n junction diode cannot be used :

Q10

The current gain for common-emitter amplifier is 59. If the emitter-current is 6.0 mA, find (i) base-current, and (ii) collector-current.