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

By: |Published on: Aug 29|Categories: Physics WAEC| 0 comments

A. 1k
B. 2k
C. 5k
D. 10k
E. 20k

Correct Answer:

Option B – 2k

Explanation

100W X 10h = 1000Wh = 1KWh thus cost is 2k

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