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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A coil is placed in a constant magnetic field of induction 10^-3 Wb /m^2 . if the radius of the coil decreases steadily at the rate of 10^-2 m/s . what will be the radius of the coil .when the induced e.m.f in the 1 mu V.

A coil is placed in a constant magnetic field of induction 10^-3 Wb /m^2 . if the radius of the coil decreases steadily at the rate of 10^-2 m/s . what will be the radius of the coil .when the induced e.m.f in the 1 mu V.

A long copper wire carries a current of I ampere. Calculate the magnetic flux per meter of the wire for a plane surface S inside the wire as shown in Fig. A wire forms a closed circular loop of radius = 1 m and resistance 5 ohm . The circle is centered on a long straight wire; at time t = 0 the current in the long straight wire is 10 rightward. Thereafter