Who spent more electricity? 500w TV set in 30 min or 600w in 20 min? Solve.
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Answer:
500 W TV in 30 min spent more electricity
Explanation:
Power = Work done/Time
Work done = Power × Time
Case 1:-
Work done = 500 × 30 × 60 J/s
= 900000 J
= 9 × 10^5 J
Case 2:-
Work done = Power × Time
= 600 × 20 × 60 J/s
= 720000 J
= 7.2 × 10^5
So in the 1st case more electricity is spent
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