Question

What is the voltage gain in a common emitter amplifier, where the input resistance is  and load resistance ? Given .

Solution

Correct option is

4.8

 

Voltage drop = current gain  resistance gain 

                      

                      

                       = 4.8

SIMILAR QUESTIONS

Q1

In a common emitter amplifier, the output resistance is  and the input resistance . In the peak value of the signal voltage is 10 mV and , then the peak value of the output voltage is 

Q2

The base current of a transistor is  and the collector current is 2 mA. What is the current gain for the common base configuration? 

Q3

In the depletion region of an unbiased pn junction diode, there are

Q4

An oscillator is nothing but an amplifier with

Q5

When Ge crystals are doped with phosphorus atom, then it becomes

Q6

The transfer ratio  of a transistor is 50. The input resistance of the when used in the common emitter configuration is . The peak value of the collector ac current for an ac input voltage for 0.01 V peak is

Q7

In a common base transistor circuit, the current gain is 0.98. On changing in the emitter current by 5.00 mA, the change in the collector current is

Q8

On increasing the reverse bias to a large value in a pn junction diode, the current  

Q9

When arsenic is added as an impurity to silicon, the resulting material is

Q10

In a pn junction dipole at a high value of reverse bias, the current rises sharply. The value of reverse bias is known as