Question

A Microwave oven operates on 1500W
of power and is used for 20 minutes. How
much electrical energy in joules and kilo watt per hour is
Used by the microwave oven?

Answer 1

Explanation:

1.8 MJ and 0.5 kWh

Explanation:

Power

Unit of power is Watt.

1 W = 1 J/s

E = 1500 x 20 min x

= 1.8 MJ

or

34%

Energy

Time

60g min = 1800000 J

1 h

E = 1500 W x 20 min x 60 min

= 0.5 kWh

= 500 Wh

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