An electric bulb of 100 W is used 8 hours per day. The energy consumed by the bulb in one day is ______ units.
100 W का एक विद्युत् बल्ब प्रति दिन 8 घंटे उपयोग किया जाता है। एक दिन में बल्ब द्वारा खपत ऊर्जा ______ इकाइयां है।

800

80

8

0.80
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CONCEPT:
The heat dissipated is given by:
Heat (H) = I2 R t
Work done (W) = Heat (H) = Energy consumed (E) = Power (P) × Time taken (t)
Where I = the current flowing in the circuit, R = the resistance of the circuit, and t = the time taken
CALCULATION:
Given,
Power = 100 W, Time = 8 hours per day
We know that,
Power (P) = Energy (E)/Time (t)
Power = 100 W = 0.1 KW
0.1 = E/8
Energy (E) = 0.8 KWh = 0.8 Unit in one day
Additional Information
1 Unit of electricity = 1 KWh = 1000 Watthour = 3.6 × 106 J
1 Kilowatt = 1000 Watt
1 Hp = 1 horsepower = 746 Watt (W)