In an AC network, the load connected is (10 + j10). The phase relation between the voltage applied and the current through the load is:

• A. Voltage leads current by 45°
• B. Voltage and current are in phase with each other
• C. Voltage lags current by 45°
• D. Voltage lags current by 30°

Answer: (A)

L0ad impedance Z = R + jX
z = 10 + 10j
Phase angle θ= tan−1(IL/IR)
θ= tan−1(10/10)
tanθ = 1
tanθ =45°