Question

A transistor is operated in common-emmitter configuration at Vc=2Volt such that a change in the produces a change in tge collector current from 5mA to 10mA.the current gain is

A.75 B.100 C.150 D. 50​

Answer 1

Answer:

B.100

Explanation:

V=2

change in tge = 5ma to 10ma

5*10=50

50*2=100

Answer 2

Q]____?

=> d ) 50

Iᴇ = Iʙ + Iᴄ

Where Iᴇ = emitter current

Iʙ = base current

Iᴄ = collector current

and current gain β = ∆Ic / ∆Iʙ

Here, ∆Ic = 10 × 10^-3 - 5 × 10^-3

= 5 × 10^-3 A

∆Iʙ = 200 × 10^-6 - 100 × 10^-6

= 100 × 10^-6 A

∴ β = 5/100× 1000 = 50

Thus, The current gain is 50 !