An ideal inductive coil has a resistance of `100Omega` When an ac signal of frequency `1000Hz` is applied to the coil the voltage leads the current by `45^(@)` The inductance of the coil is .

When 200 volts dc is applied across a coil a current of 2A flows through it. When 200 V ac of 50 Hz is applied to the same coil only 1A flows. Calculate the resistance impedance and inductance of the coil.

A coil of resistance 400 Omega and inductance 0.5 H is connected across an alternating voltage of frequency 100 Hz. Calculate the phase difference between voltage and current in the circuit.