101.Two coaxial coils are very close to each other and their mutual inductance is 5mH. If a current 50sin500t is passed in one of the coils then the peak value of induced e.m.f 8n the secondary coils will be

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Q. Two coaxial coils are very close to each other and their mutual inductance is

3 H .

If a current

i_{1} = 2 sin 30 t A

is passing through the first coil, then find the peak value of induced emf in the second coil.

Q. The coefficient of mutual inductance of two coils is

5 H .

The current through the primary coil is reduced to zero value from

3 A

1

millisecond. The induced e.m.f. in the secondary coil will be :

Q. A primary coil and secondary coil are placed close to each other. A current, which changes at the rate of

25

amp in a millisecond, is present in the primary coil. If the mutual inductance is

92 \times 10^{- 6} H

, then the value of induced emf in the secondary coil is:

Q. Alternating current of peak value

(\frac{2}{π})

ampere flows through the primary coil of the transformer. The coefficient of mutual inductance between primary and secondary coil is 1 henry. The peak e.m.f. induced in secondary coil is
(Frequency of a.c. = 50 Hz)

If a current of 3 amperes flowing in the primary coil is reduced to zero in 0.001second, then the induced e.m.f in the secondary coil is 15000 volts. The mutual inductance between the two coils is

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