Energy and Power

Q1: If it takes 400 ms to use 12,000 J of energy, the power is

A 30 kW

B 30 W

C 3 W

D 300 kW

ANS:A - 30 kW

Energy = Power*Time.

Power = Energy/Time.

Power = 12000/0.400.

= 30000 watt.

= 30 kw.



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