In a magnetic field of `0.05T`, area of a coil changes from `101 cm^(2)` to `100 cm^(2)` without changing the resistance which is `2Omega`. The amount of charge that flow during this period is

In a magnetic field of 0.05T , area of a coil changes from 101 cm^(2) to 100 m^(2) without changing the resistance which is 2Omega. The amount of charge that flow during this period is

If the area of a circle change at the rate of 0.8 cm^(2)//sec , then, when the radius is 4 cm , it circumference changes at the rate of

If a coil of 40 turns and area 4.0 cm^(2) is suddenly remove from a magnetic field, it is observed that a charge of 2.0xx10^(-4)C flows into the coil. If the resistance of the coil is 80Omega , the magnetic flux density in Wb//m^(2) is

In a coil of area 10cm^(2) and 10 turns, magnetic field is directed perpendicular to the plane and is changing at a rate of 10^(4)Ts^(-1) . The resistance of the coil is 20Omega . The current in the coil will be

A magnetic field of flux density 10 T acts normal to a cail of 50 turns having 100 cm ^(2) area. Find the emf induced, if the coil is removed from the magnetic field in 0.1 s.

A magnetic field of 2xx10^(-2)T acts at right angles to a coil of area 100cm^(2) with 50 turns. The average emf induced in the coil is 0.1V , when it is removed from the field in time t . The value of t is