Question

In an a.c. circuit V and I are given by
V = 100 sin (100 t) volts
I = 100 sin (100 t + π/3) mA
the power dissipated in the circuit is
(a) 10⁴ watt (b) 10 watt (c) 2.5 watt (d) 5.0 watt

Answer 1

Answer:

2.5 watt

Explanation:

P=V

r.m.s

×I

r.m.s

×cosϕ

=

2

1

×100×(100×10

−3

)cosπ/3=2.5W