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
Different Measuring Instruments
question_answer
A potentiometer consists of a wire of length 4 m and resistance 10 W. It is connected to cell of emf 2 V. The potential difference per unit length of the wire will be [Pb. PET 2002]
A) 0.5 V/m
B) 10 V/m
C) 2 V/m
D) 5 V/m
Correct Answer:
A
Solution :
Potential difference per unit length \[=\frac{V}{L}=\frac{2}{4}=0.5\,V/m\]