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?
-
A.
1k -
B.
2k -
C.
5k -
D.
10k -
E.
20k
Correct Answer: Option B
Explanation
100W X 10h = 1000Wh = 1KWh thus cost is 2k