When the primary current in the spark-coil of a car changes from 4A to zero in `10muS`, an emf of 40,000 V is induced in the secondary. The mutual inductance between the primary and the secondary windings of the spark-coil will be -

If the current in the primary coil is reduced from 3 A to zero in 0.001 s, the induced emf in the secondary coil is 1500 volt. Calculate the mutual inductance between two coils.

If the current in the primary coil is reduced from 3A to zero in 10 second, then the induced e.m.f. in the secondary is 15xx10^(-3) volt. The mutual inductance of the coil will be

If the current 30A flowing in the primary coil is made zero in 0.1 sec. the emf induced in the secondary coil is 1.5 volt. The mutual inductance between the coil is

An emf of 40 kV is induced in the secondary of car spark coil when the current in primary changes from 5A to 2A in 20 mus . Calculate the mutual inductance between the primary and secondary windings of this coil.

If the current in the primary circuit of a pair of coils changes from 10 A to 0 in 0.1 s, calculate (i) the induced emf in the secondary if the mutual inductance between the two coils is 2 H and (ii) the change of flux per turn in the secondary if it has 500 turns.

In a car spark coil an e.m.f. of 40000 volts is induced in a secondary when the primary current changes from 4A to 0 in 10 mu s . The mutual inductance between the primary and secondary winding of this spark coil is (nxx(1)/(10)) henry, then n=

If a current of 3A, flowing in the primary coil is reduced to zero in 10^(-3) s , the induced e.m.f in the secondary coil is 15000 V. The mutual inductance between the two coils is

If a current of 3 A flowing in the primary coil is reduced to zero in 0.01 s, the e.m.f induced in the secondary coil is 750 V. What is the mutual inductance between the two coil ?