Current Electricity Charging Discharging Of Capacitors Question 312
Question: In a potentiometer experiment the balancing with a cell is at length 240 cm. On shunting the cell with a resistance of 2 W, the balancing length becomes 120 cm. The internal resistance of the cell is
[DCE 2002; AIEEE 2005]
Options:
A) 4 W
B) 2 W
C) 1 W
D) 0.5 W
Show Answer
Answer:
Correct Answer: B
Solution:
$ r=R,( \frac{l _{1}}{l _{2}}-1 ) $
$ =2,( \frac{240}{120}-1 ) $
$ =2,\Omega $
BETA
