Question

In an ac circuit, the instantaneous values of e.m.f. and current are e = 200 sin 314 t volt and$i = \sin \left( 314 t + \frac { \pi } { 3 } \right)$ ampere. The average power consumed in watt is

• A. 200
• B. 100
• C. 50
• D. 25

Answer 1

Answer: (C)

50

Answer 2

$V _ { r m s } = \frac { 200 } { \sqrt { 2 } } , i _ { r m s } = \frac { 1 } { \sqrt { 2 } }$