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Question

Three identical batteries each emf 4 V and zero of negligible internal resistance are connected as shown in figure below. The potential difference between the poiints A and G (VA−VG)

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A
4 V
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B
4V
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C
8 V
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D
8V
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Solution

The correct option is B 4V
Current in ABCDA loop : I1=42+2=1A
Current in EFGHE loop : I2=43+3=2/3A

Applying KVL A to G, VA+2I1+43I2=VG
or VAVG=3I22I14=3(2/3)24=4 V

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