Question 261993PhysicsWAEC

A lamp marked 100W 250 V is lit for 10 hours. If it operates normally and 1kwh of electrical energy costs 2k, what is the cost of lighting the lamp?

A

1k

B

2k

C

5k

D

10k

Step-by-Step Explanation

100W to kW = 0.1kW
t = 10hrs
E = 0.1 × 10 = 1kWh
1Kwh costs 2k

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