In transistor, the change in base current from 300 microampere to 350 microampere,causes a change in collector current from 5 miliampere to 10 miliapmere keeping collector to emitter voltage constant at 10 V.Base to emitter voltage is 0.7V.then the current gain of transistor is ?

Explanation

To find the current gain (β) of the transistor, we will follow these steps:

### Step 1: Identify the change in base current (ΔIb)
The base current changes from 300 microamperes (μA) to 350 microamperes (μA).

\[ \Delta I_b = I_{b(final)} - I_{b(initial)} = 350 \, \mu A - 300 \, \mu A = 50 \, \mu A \]
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