Question

an alternating voltage 80+j60v is applied to a circuit and the current flowing is -4+j10A find (a)the impedance of the circuit (b)the power consumed,and (c)the phase angle.

Answer 1

a) impedance is same as resistance = voltage/current

b) power = real part of voltage x real part of current

c) phase angle = tan inverse of (imaginary part/real part)