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JEE Main & Advanced Physics Semiconducting Devices Question Bank Junction Transistor

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    While a collector to emitter voltage is constant in a transistor, the collector current changes by 8.2 mA when the emitter current changes by 8.3 mA. The value of forward current ratio hfe is                                         [KCET 2002]

    A)            82  

    B)            83

    C)            8.2 

    D)            8.3

    Correct Answer: A

    Solution :

               \[{{h}_{fe}}={{\left( \frac{\Delta {{i}_{c}}}{\Delta {{i}_{b}}} \right)}_{{{V}_{ce}}}}=\frac{8.2}{8.3-8.2}=82\]


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