For a coil of unit area, induction is doubled in `0.2s`. Then, the induced e.m.f. is

If a current of 3.0 amperes flowing in the primary coil is reduced to zero in 0.001 second, then the induced e.m.f. in the secondary coil is 15000 "volts" . The mutual inductance between the two coils is

If a current of 3.0 amperes flowing in the primary coil is reduced to zero in 0.001 second, then the induced e.m.f. in the secondary coil is 15000 "volts" . The mutual inductance between the two coils is

If the rate of change of current in primary coil is doubled,the induced e.m.f. in secondary coil will become

A coil of area 100 cm^(2) has 500 turns. Magnetic field of 0.1 "weber"//"metre"^(2) is perpendicular to the coil. The field is reduced to zero in 0.1 second. The induced e.m.f. in the coil is

If the current in the primary coil is reduced from 3.0 ampere to zero in 0.001 second, the induced e.m.f in the secondary coil is 1500 volt. The mutual inductance of the two coils will be-

When the current in a coil changes form +2A to-2A in 0.5 sec then the induced e.m.f. is 8V, Find self inductance of the coil.

The current in a coil of inductance 5H decreases at the rate of 2A//a . The induced e.m.f. is