Ohm's Law - Technical MCQs

Q1:

What is the power in the given circuit?

A 3.92 kW

B 280 W

C 28.6 W

D 9.8 W

ANS:D - 9.8 W

p = i^2r this is right i=v/r a/c ohm's law.
p = 7/10 * 7/10 * 20.
p = 9.8W.