Current Electricity Charging Discharging Of Capacitors Question 302
Question: The e.m.f. of a standard cell balances across 150 cm length of a wire of potentiometer. When a resistance of $ 2,\Omega $ is connected as a shunt with the cell, the balance point is obtained at $ 100,cm $ . The internal resistance of the cell is
[MP PET 1993]
Options:
A) $ 0.1,\Omega $
B) $ 1,\Omega $
C) $ 2,\Omega $
D) $ 0.5,\Omega $
Show Answer
Answer:
Correct Answer: B
Solution:
Using $ r=R,( \frac{l _{1}}{l _{2}}-1 ) $
$ =2,( \frac{150}{100}-1 )=1\Omega $
BETA
