A current of 2 A flows through a 2 
resistor when connected across a battery. The same battery supplies a current of 0.5 A when connected across a 9 
resistor. The internal resistance of the battery is
A
0.5 
B
1/3 
C
1/4 
D
1 
Text Solution
Verified by ExpertsThe correct answer is:
B
Let 
be the emf and 
be internal resistance of the battery.
In the first case,
(i)
In the second case,
(ii)
Divide (i) by (ii), we get
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