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A helium nucleus is moving in a circular path of radius 0.8m. If it takes 2 sec to complete one revolution. Magnetic field produced at the centre of the circle :-
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Important Questions on Magnetic Effect of Current
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A cell of an emf of, and internal resistance of is sending current through a tangent galvanometer of resistance, . If another external resistance of is introduced, the deflection of the galvanometer is, . The reduction factor of the galvanometer is:-
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A stationary magnet does not interact with:-
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Following is a square shape loop, whose one arm BC produces a magnetic field at the center of the coil. The resultant magnetic field due to all the arms will be:-
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A wire is parallel to one arm of a square current-carrying loop, which also carries current. Now at any point within the coil, the magnetic field will be:-
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A current of is established in a long wire along the positive z-axis. Find the magnetic field at the point .
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The radius of the current-carrying coil is, . Then the ratio of magnetic fields at the centre of the coil to the axial point, which is , distance away from the centre of the coil:-
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A coil of one loop is made by a wire of length L and there after a coil of two loops is made by same wire. The ratio of magnetic field at the centre of coils respectively :-
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Assume the given diagram a combination of complete circle and two semi-infinite wires. Magnetic field at point will be:
