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physics

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A straight horizontal rod A of mass 50 gm and length 0.5 m, is placed in a uniform horizontal magnetic field of 0.2 T, perpendicular to A. Calculate the current in A if the force acting on it just balances it weight.

  • physics - ,

    Require that
    M g = B I L

    Solve for I (amps). Make sure M is in kg.

    I = M g/(B L)

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