1.

The energy comsumed in 10 hours by 4 devieesf power 500 w:a) 20 Jolec) 20 kwh(b) 20 Wan(d) 5 kwh.

Answer»

power = 500 W =0.5 kWtime = 10 hpower = energy / time0.5 = E/100.5 * 10 = E E =5 kWhnow ,energy consumed by 4 machines = 4 * 5 = 20 units

Option (c) is correct.



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