Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर
JEE Main & Advanced
Physics
Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर
Question Bank
Heating Effect of Current
question_answer
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 [MP PET 2003; CBSE PMT 2004]
A) 180 W
B) 60 W
C) 20 W
D) \[\frac{20}{3}W\]
Correct Answer:
C
Solution :
In series \[{P}'=\frac{P}{n}=\frac{60}{3}=20\,watts\]