Answer :


Given:
Inductance of the coil: L = 0.01 H
Resistance of the coil : R = 1 Ω
Supply voltage: V = 200 V
Frequency: f = 50 Hz
Formula used:
Impedance of the circuit is given as

Here, Z is the impedance, R is the resistance and XL is the inductive reactance.
XL = 2πfL
XL = 2× π × 50× 0.01
XL = 3.14 Ω
Substituting we get,

Z = 3.29 Ω
Now, expression for phase of the circuit is:



ϕ = 72.33°= 1.26 radians
Time lag is given as:



t = 4×10-3 seconds
Hence, impedance of the circuit is 3.29 Ω and time lag between max. alternating voltage and current is 4 ms.

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