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
A hot electric iron has a resistance of \[80\,\Omega \] and is used on a 200 V source. The electrical energy spent, if it is used for two hours, will be [Pb. PET 2002]
A) 8000 Wh
B) 2000 Wh
C) 1000 Wh
D) 800 Wh
Correct Answer:
C
Solution :
Energy \[\frac{{{V}^{2}}}{R}t=\frac{200\times 200\times 2}{80}=1000\,Wh\]