Alternating Cur...

In the a.c. circuit shown in fig. the supply voltage has a constant r.m.s value V, but variable frequency f, Resonance frequency is

In the circuit shown in fig if value of R = 60Ω, then the current flowing through the condenser will be

The value of conductance in the adjoining circuit shown if fig is

If number of turns in primary and secondary coils is increased to two times each, the mutual inductance

The current flowing in a coil of self inductance 0.4 mH is increased by 250 mA in 0.1 s. The e.m.f induced will be

Mutual inductance of two coils can be increased by

An LCR series circuit is connected to a source of alternating current. At resonance, the applied voltage and the current flowing through the circuit will have a phase difference of

In general, in an alternating current circuit

In a noiseless transformer, an alternating current of 2 ampere is flowing in the primary coil. The no. of turns in the primary and secondary coils are 100 and 20 respectively. The value of the current in secondary coil is

In a car spark coil, an emf of 40000 V is induced in a secondary when the primary current changes from 4 A to zero in 10μs. Find the mutual inductance between the primary and secondary windings of the spark coil.