A current of 2.5 A flows through a coil of inductance 5 H. The magnetic flux linked with the coil is

A wire loop is rotated in a magnetic field. The frequency of change of direction of the induced e.m.f. is

A coil of self-inductance L is connected in series with a bulb B and an AC source. Brightness of the bulb decreases when

The instantaneous values of alternating current and voltage in a circuit are given as

$$i = {1 \over {\sqrt 2 }}$$ sin (100 $$\pi $$t) ampere

$$e = {1 \over {\sqrt 2 }}\sin \left( {100\pi t + {\pi \over 3}} \right)$$ Volt

The average power in watts consumed in the circuit is