2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-3

  • question_answer
                                                In n-p-n transistor, the collection current is 10MA. If 90% of electrons emitted reach the collector then:                                            

    A)  emitter current will be \[9\text{ }mA\]                

    B)  emitter current will be \[\text{11}\text{.1 }mA\]

    C)  base current will be \[\text{0}\text{.1 }mA\]

    D)  base current will be \[\text{0}\text{.0 }mA\]  

    Correct Answer: B

    Solution :

        Here     \[{{I}_{C}}=0.9{{I}_{E}}\] \[\Rightarrow \]               \[{{I}_{E}}=\frac{10}{0.9}=11.1\,mA\] For emission of electrons, incident energy of each photon must be greater than work - function of aluminium (threshold energy).


You need to login to perform this action.
You will be redirected in 3 sec spinner