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NEET Sample Paper NEET Sample Test Paper-22

  • question_answer
    A conducting square loop of side\[\ell \]and resistance R moves in its plane with a uniform velocity v perpendicular to one of its sides. A uniform and constant magnetic field B exists along the perpendicular to the plane of the loop as shown in figure. The current induced in the loop is:

    A) \[\frac{B\ell v}{R}\]clockwise

    B)  \[\frac{B\ell v}{R}\]anticlockwise      

    C)  \[\frac{2B\ell v}{r}\]anticlockwise     

    D)  0

    Correct Answer: D

    Solution :

    Induced \[emf=e=-\frac{d\phi }{dt},\]where \[\phi =\vec{B}.\vec{A}\] As both \[\vec{B}\]and \[\vec{A}\]are constant so \[\phi \]is constant, hence induced emf in the loop is zero. Hence, the correction option is [d].


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