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P, Q and R long parallel straight wires in air, carrying currents as shown. The direction of resultant force on R is :-
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Important Questions on Magnetic Effect of Current
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Two parallel wires in free space are 10 cm apart and each carries a current of 10 A in the same direction. The magnetic force per unit length of each wire is :-
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Wire in the form of a right angle , with and carries a current of . There is a uniform magnetic field of perpendicular to the plane of the wire. The force on the wire will be :-
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When alternating current passes through a spring then it :-
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When direct current passed through a spring then it :-
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A rectangular loop carrying a current i2, is situated near a long straight wire carrying a steady current i2. The wire is parallel to one of the sides of the loop and is in the plane of the loop as shown in the figure. Then the current loop will :-
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Two parallel beams of positrons moving in the same direction will :-
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Due to the flow of current in a circular loop of radius R, the magnetic field produced at the centre of the loop is B. The magnetic moment of the loop is :-
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A circular loop has a radius of 5 cm. and it is carrying a current of 0.1 A. its magnetic moment is :
