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Q.

In circuit shown below, the resistances are given in ohms and the battery is assumed ideal with emf equal to 3 volt. The voltage across the resistance R4 is

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a

0.4 V

b

0.6 V

c

1.2 V

d

1.5 V

answer is A.

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Detailed Solution

∴  Total  current  through  battery,  i=375i1 =i2 = 375 ×2 = 3150current through R4 = 3150 × 630 +60=3150 × 6090=2150 AV4 =i4 × R4 = 2150 × 30=25V=0.4 V
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