Electromagnetic...

The current flowing in a copper voltameter is 3.2 A. The number of copper ions $$(Cu^{2+})$$ deposited at the cathode per minute is

In a coil of self inductance $$0.5$$ henry, the current varies at a constant rate from zero to 10 amperes in 2 seconds. The e.m.f.generated in the coil is

Which of the following is wrong statement

A coil of wire of a certain radius has $$600$$ turns and a self inductance of $$108$$ mH. The self inductance of a $$2^{nd}$$ similar coil of $$500$$ turns will be

A wheel with ten metallic spokes each $$0.50\, m$$ long is rotated with a speed of $$120\, rev/min$$ in a plane normal to the earths magnetic field at the place. If the magnitude of the field is $$0.4$$ Gauss, the induced e.m.f.between the axle and the rim of the wheel is equal to

In the figure, shown the magnetic induction at the center of their arc due to the current in the potion $$AB$$ the magnetic induction at $$O$$ due to the whole length of the conductor is  

In the figure shown, the magnetic induction at the center of their arc due to the current in the potion $$AB$$ will be 

The electrochemical equivalent of a metal is $$3.3\times 10^{-7}$$ kg / coulomb. The mass of the metal liberated at the cathode when a 3 A current is passed for 2 second will be

Find out the e.m.f. produced when the current changes from 0 to 1 A in 10 second, given $$L = 10 \,\mu H$$

Plane of eddy currents makes an angle with the plane of magnetic lines of force equal to