Current Electricity Charging Discharging Of Capacitors Question 255
Question: If the resistivity of a potentiometer wire be $ \rho $ and area of cross-section be A, then what will be potential gradient along the wire
[RPET 1996]
Options:
A) $ \frac{I\rho }{A} $
B) $ \frac{I}{A\rho } $
C) $ \frac{IA}{\rho } $
D) $ IA\rho $
Show Answer
Answer:
Correct Answer: A
Solution:
Potential gradient $ x=\frac{V}{L}=\frac{iR}{L}=\frac{i,( \frac{\rho L}{A} )}{L}=\frac{i\rho }{A} $
BETA
