A coil of 0.01 henry inductance and 1 ohm resistance is connected to 200 volt, 50 Hz ac supply. Find the impedance of the circuit and time lag between max. alternating voltage and current.

Explanation

`Z = sqrt(R^2 + X_(L)^(2)) = sqrt(R^2 + (2pifL)^2) = 3.3 Omega`
`tan phi = (omega L )/(R ) = (2 n fL )/(R ) = 3.14`
` phi ~= 72^@`
`"Phase diff". phi = (72xx pi)/(180) rad`.
`omega = (Delta phi )/(Deltat)`, time lag `Delta t = (phi)/(omega)`
`= (72 pi )/(180 xx 2pi xx 50)=(1)/(250) s`