Q.

The power supplied by battery shown in the diagram is (ammeter is ideal)

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a

Zero

b

14.6 W

c

20.25 W

d

32.6 W

answer is B.

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Detailed Solution

Let I is current through battery Let x be current through 3Ω resistance x×315=0.3         ⇒           x=1.5 A∴  I=1.8A                        P=I2R=14.6 W
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