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
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