Page 353 - Basic Electrical Engineering

Squaring,

Example 3.18 A voltage of v = 100 sin (314t + 0) is applied across a
resistance and inductance in series. A current of 10 sin (314t – π/6) flows
through the circuit. Calculate the value of R and L of the circuit. Also

calculate power and power factor.

Solution:

v = 100 sin 314t

= V sin ωt
m
V = 100 V
m

Similarly,

i = 10 sin (ωt − 30°)

= Im sin (ωt − 30°)

Current, I is lagging V by 30°.