First slide

KVL

Question

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

Moderate

A

Zero
B

14.6 W
C

20.25 W
D

32.6 W

Solution

Let I is current through battery
Let x be current through 3 $Ω$ resistance
$\frac{x \times 3}{15} = 0 .3 \Rightarrow x = 1 .5 A$
$∴ I = 1 .8 A P = I^{2} R = 14 .6 W$

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