A battery of emf 10 V is connected to a group of resistances as shown in figure. The potential-difference 
between the points A and B is
A
-2 V
B
2 V
C
5 V
D
Text Solution
Verified by ExpertsThe correct answer is:
B
Resistance between upper branch and lower branch in parallel part is same, so equal amount of current flows through them.
Let main current is I.
Equivalent resistance of circuit,
So, current in each branch 
Now, 
… (i)
and 
… (ii)
Solving Eqs. (i) and (ii), we have
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