Q. Three electric bulbs of rating $60W$ each are joined in series and then connected to electric mains. The power consumed by these three bulbs will be
A) $180\ W$
B) $60\ W$
C) $20\ W$
D) $\frac{20}{3}W$
Explanation
(c) In series$\ P^{'} = \frac{P}{n} = \frac{60}{3} = 20\ watts$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.