Question

A common base transistor amplifier has an input resistance of 20 ohms and output resistance of 100 kilo ohms. The collector load is 1 K ohms. If a signal of 500 mV is applied between emitter and base, find the voltage amplification Select one: O a. 25 O b. 75 C. 100 d. 50​

Answer 1

Explanation:

input current =15×10

−6

output current =3×10

−3

resistance output =1000

V

input

=10×10

−3

V

input

=r

input

×i

input

10×10

−3

=r

input

×15×10

−6

r

input

=

3

2000

=0.67kΩ

voltage gain =

V

input

V

output

=

10×10

−3

1000×3×10

−3

=300