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    Physics
    Grade-10
    Easy

    Question

    In a magnetic field, a rectangular coil of copper wires is rotated. Once in each rotation, the direction of the induced current changes.

    1. One revolution
    2. One fourth revolution
    3. Half revolution
    4. Two revolutions

    Hint:

    A rectangular coil fixed in an electrical generator in a magnetic field, the coil rotates to enhance the current flow which is reversed in each half revolution.

    The correct answer is: Half revolution

      In a magnetic field, a rectangular coil of copper wires is rotated. Once in each rotation, the direction of the induced current changes in half revolution.
      • The rectangular coil in the generator provides a rotational shift to the induced current.
      • It reverses the direction of the current in each half-cycle.
      • So the direction of induced current changes in half revolution.

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