In transistor, the change in base current from 175 microampere to 200 microampere,causes a change in collector current from 5 miliampere to 7.5 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: Calculate the change in collector current (ΔIc)
The collector current changes from 5 mA to 7.5 mA. We can calculate ΔIc as follows:

\[ \Delta I_c = I_{c(final)} - I_{c(initial)} = 7.5 \, \text{mA} - 5 \, \text{mA} = 2.5 \, \text{mA} \]
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