Question

Calculate the current gain  of a transistor if the current-gain  is 0.98.

Solution

Correct option is

49

The current gain  (in common-emitter arrangement) is related to the current gain  (in common-base arrangement) of a transistor as under : 

              

  

  

              = 49.

SIMILAR QUESTIONS

Q1

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

Q2

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 :

Q3

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  

                                                                        

Q4

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 :

                                

Q5

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

Q6

A junction diode can be used for :

Q7

p-n junction diode cannot be used :

Q8

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.

Q9

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.

Q10

In a silicon transistor, a change of 7.98 mA in the emitter-current produces a change of 7.8 mA in the collector-current. Find the required change in the base current to produce an equivalent change in the collector current.