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JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Self Evaluation Test - Electrostatic Potential and Capacitance

  • question_answer
    Two points P and Q are maintained at the potentials of 10 V and -4 V, respectively. The work done in moving 100 electrons from P to Q is:

    A) \[9.60\times {{10}^{-17}}J\]

    B) \[-2.24\times {{10}^{-16}}J\]

    C) \[2.24\times {{10}^{-16}}J\]

    D) \[-9.60\times {{10}^{-17}}J\,\]

    Correct Answer: C

    Solution :

    [c] \[{{W}_{PQ}}=q\left( {{V}_{Q}}-{{V}_{P}} \right)\] \[=\left( -100\times 1.6\times {{10}^{-19}} \right)\left( -4-10 \right)\] \[=+2.24\times {{10}^{-16}}J\]


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