Find the power supplied by 20 V cell in the figure shown.

Find the power supplied by 20 V cell in the figure shown.

A
$- 10 W$
B
20 W
C
$- 20 W$
D
10 W

Solution:

Taking point A as reference potential and its potential to be 0 : I = 20 A

Power supplied by 20V cell $= - 20 \times 1 = - 20 W$

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