1.

Who will spend more electricalenergy? 500 W TV Set in 30 mins, or 600 W heater in 20 mins?

Answer»

Answer:

500 W TV in 30 min.

Explanation:

ENERGY = Power × TIME of usage

500 × (30×60)s = 900,000.

600 × (20×60)s = 720,000.

:)



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