Question

a bulb is rated at 200 volts 100 Watts 5 such bulbs burn for 4 hours daily for 20 days what is the electrical energy consumed calculate the cost if the rate is rupees 4.6 per unit

Answer 1

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Answer 2

Using, P = V²R

we get R = V²P

= (200)²100

= 400

Energy consumed = P x t

= 100 x 80

= 8000 Wh

= 8 kWh

Cost at the rate of 4.6 paise per unit

= Rs (8 x 4.6)

= Rs 36.8

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