Question

A transistor is operated in common emitter configuration at $V_{C}$ = 2V such that a change in the base current from 100 μA to 300 μA produces a change in the collector current from 10mA to 20 mA. The current gain is(a) 50(b) 75(c) 100(d) 25

Answer 1

A is the currect answer

Answer 2

Answer:

A) 50

Explanation:

Current change =100 μA to 300 μA

Vc  = 2V

For common emitter, the current gain is

β = (ΔIc/ΔIb)

Thus, at a given potential difference of CE

β = ( 10× 10 power -3 -5× 10 power -3)A / ( 200×10 power -6 -100× 10 power -6 )

= 5× 10 power -3/ 100× 10 power -6

= 50

Thus, the current gain will be 50