In a transistor, the change in base current from \( 100 \mu \mathrm{A} \) to \( 125 \mu \mathrm{...

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In a transistor, the change in base current from \( 100 \mu \mathrm{A} \) to \( 125 \mu \mathrm{A} \) causes a change in collector current from \( 5 \mathrm{~mA} \) to \( 7.5 \mathrm{~mA} \), keeping collector-to-emitter voltage constant at 10
\( \mathrm{V} \). What is the current gain of the transistor?
(a) 200
(b) 100
(c) 50
(d) 25
W
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