Current Electricity Charging Discharging Of Capacitors Question 257
Question: For a cell of e.m.f. 2V, a balance is obtained for 50 cm of the potentiometer wire. If the cell is shunted by a $ 2,\Omega $ resistor and the balance is obtained across 40 cm of the wire, then the internal resistance of the cell is
[SCRA 1998]
Options:
A) $ 0.25,\Omega $
B) $ 0.50\Omega $
C) $ 0.80,\Omega $
D) $ 1.00,\Omega $
Show Answer
Answer:
Correct Answer: B
Solution:
$ r=( \frac{l _{1}-l _{2}}{l _{1}} )R=0.5,\Omega $ .
BETA
