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KVPY Sample Paper KVPY Stream-SX Model Paper-24

  • question_answer
    A 2 W carbon resistor is colour coded with green, black and brown respectively. The maximum current which can  be passed through this resistor is:

    A) 20 mA

    B) 100 mA

    C) 04 mA

    D) 63 mA

    Correct Answer: A

    Solution :

    By colour coding.
    \[R=50\times {{10}^{2}}\Omega \]
    \[{{I}^{2}}R=P\]
    \[I=\sqrt{\frac{P}{R}}=20\,mA.\]


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