Current Electricity Charging Discharging Of Capacitors Question 222
Question: In a potentiometer circuit there is a cell of e.m.f. 2 volt, a resistance of 5 ohm and a wire of uniform thickness of length 1000 cm and resistance 15 ohm. The potential gradient in the wire is
[MP PMT 1994]
Options:
A) $ \frac{1}{500}V/cm $
B) $ \frac{3}{2000}V/cm $
C) $ \frac{3}{5000}V/cm $
D) $ \frac{1}{1000}V/cm $
Show Answer
Answer:
Correct Answer: B
Solution:
Potential gradient $ x=\frac{V}{L}=\frac{iR}{L} $
Therefore $ x=\frac{2}{(15+5)}\times \frac{15}{10}=\frac{3}{2000}volt/cm $
BETA
