Railways General Science & Technology Electrostatics & Capacitance Sample Paper Electrostatics Sample Test Paper-8

  • question_answer
    A soap bubble is given a negative charges then its radius

    A)  Decreases

    B)  Increases

    C)  Remains unchanged

    D)  Nothing can be predicted as information is insufficient

    Correct Answer: B

    Solution :

    [b] Every system tends to decrease its potential energy to attain more stability when we increase charge on soap bubble its radius increases \[\left[ U\,\propto \frac{1}{r} \right].\]


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