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JEE Main & Advanced Physics Electro Magnetic Induction JEE PYQ-Electro Magnetic Induction

  • question_answer
    A boat is moving due east in a region where the earth's magnetic field is \[5.0\times {{10}^{-5}}N{{A}^{-1}}\] due north and horizontal. The boat carries a vertical aerial 2 m long. If the speed of the boat is \[1.50\,m{{s}^{-1}}\], the magnitude of the induced emf in the wire of aerial is                                                      [AIEEE 2011]

    A) \[0.15\] mV

    B) 1 mV

    C) \[0.75\] mV

    D) \[0.50\] mV

    Correct Answer: A

    Solution :

    [a]
    \[\varepsilon =Bvl\]
    \[=5.0\times {{10}^{-5}}\times 2\times 1.50\]
    \[=15\times {{10}^{-5}}\]
    \[=0.15\] mV


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