Question

When 5 A current flows into the positive terminal of voltage source 6 V. Calculate the power delivered by the source.

(a) -30 W

(b) 36 W

(c) -43 W

(d) 50 W

I have been asked this question in quiz.

This interesting question is from Electric Motors in chapter Braking of Electric Motors of Electric Drives

Answer 1

Correct option is (a) -30 W

The explanation is: When the current enters the positive terminal of an element it will always absorb the power and when the current leaves the positive terminal it will deliver the power. Power delivered is -5×6=-30 W.