Questions in emi

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	A rectangular coil of 20 turns and area of cross- section 25 sq cm has a resistance of 100 ohm. If a magnetic field which is perpendicular to the plane of the coil changes at the rate of 1000 Tesla per second, the current in the coil is
	The north pole of a magnet is brought near a metallic ring. The direction of the induced current in the ring will be
	Lenz’s law applies to
	If a coil of metal wire is kept stationary in a non-uniform magnetic field, then
	The magnetic flux linked with a coil, in webers, is given by the equations $\varphi = 3{t^2} + 4t + 9$. Then the magnitude of induced e.m.f. at t = 2 second will be
	A coil has an area of 0.05 m2 and it has 800 turns. It is placed perpendicularly in a magnetic field of strength $4 \times {10^{ - 5}}\,Wb/{m^2},$ it is rotated through ${90^o}$ in 0.1 sec. The average e.m.f. induced in the coil is
	A moving conductor coil in a magnetic field produces an induced e.m.f. This is in accordance with
	In the diagram shown if a bar magnet is moved along the common axis of two single turn coils A and B in the direction of arrow
	Magnetic flux $\varphi$ (in weber) linked with a closed circuit of resistance 10 ohm varies with time t (in seconds) as $\varphi = 5{t^2} - 4t + 1$. The induced electromotive force in the circuit at t = 0.2 sec. is
	The formula for induced e.m.f. in a coil due to change in magnetic flux through the coil is (here A = area of the coil, B = magnetic field)