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     EduGorilla 
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    A circular coil of 5 turns and of 10 cm mean diameter is connected to a voltage source. If the resistance of the coil is 10, what should be the voltage of the source, so as to nullify the horizontal component of Earth’s magnetic field of 30 A turn m–1 at the centre of the coil?

    Options :-

    1. 6v, plane of the coil normal to magnetic meridian
    2. 2v, plane of the coil normal to magnetic meridian
    3. 6v, plane of the coil along the magnetic meridian
    4. 2v, plane of the coil along the magnetic meridian
    5. 4v, plane of the coil normal to magnetic meridian
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