VIT Engineering VIT Engineering Solved Paper-2008

  • question_answer
    In the absence of applied potential, the electric current flowing through a metallic wire is zero because

    A)   the electrons remain stationary

    B)   the electrons are drifted in random direction with a speed of the order of \[{{10}^{-2}}cm/s\]

    C)   the electrons move in random direction with a speed of the order close to that of velocity of light

    D)   electrons and ions move in opposite direction  

    Correct Answer: C

    Solution :

    At room temperature, the free electrons in a conductor move randomly with speed of the order of l05 m/s. Since, the motion of the electrons is random there is no net charge flow in any direction.


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