Circuit Theory

 Unit of power is/are

a) watts

b) joules/sec

c) Both a and b

d) None of the above

Correct Answer: Option C

Solution:

Power

• Rate at which the work is done
• Rate of expending or consuming energy. $$p (t)=\frac{dW}{dt}$$
• Unit:
• Watt
• Joules/second (since Work-done per unit time)
• Also, Work done = Force × distance, hence unit of power can be Nm/s