Two concentric circular loops of radii and are placed in X-Y plane as shown in the figure. current is flowing through them in the direction as shown in figure. The net magnetic moment of this system of two circular loops is approximately :
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From the given figure. Magnetic moment will be, current
If is magnetic moment and is the magnetic field, then the torque is given by
The magnetic moment of a circular coil carrying current is
directly proportional to the length of the wire in the coil
inversely proportional to the length of the wire in the coil
directly proportional to the square of the length of the wire in the coil
inversely proportional to the square of the length of the wire in the coil
Two wires of the same length are shaped into a square of side ' ' and a circle with radius ' '. If they carry same current, the ratio of their magnetic moment is
A circular loop of area carrying a current of , is held with its plane perpendicular to a magnetic field induction . The torque acting on the loop is
zero
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