The power of four devices = 4 × 500 W = 2000 W
Time = 10 hours
Therefore, the energy consumed = power × time
= 2,000 × 10 Wh
= 20,000 Wh
= 20 kWh
= 20 units [1 unit = 1 kWh]
Question
Find the energy in kW h consumed in 10 hours by four devices of power 500 W each.
- work and energy CBSE Class 9
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