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>>Introduction to Work
>> $A TV set having a power rating of 200W o$

Question

A TV set having a power rating of $200 W$ operates for $5$ hours a day. What is the cost of electrical energy required to operate it for a period of $30$ days?The rate of electrical energy is Rs. $3.40$ per kWh.

A

Rs 680

B

Rs 17

C

Rs 600

D

Rs 102

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Updated on : 2022-09-05

Solution

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Correct option is D)

Here, power $P = 200 W = 200 / 1000 = 0.2 k W$
Electrical energy loss per day $= 0.2 \times 5 = 1 k W h$
Thus, the electrical energy loss for 30 days $= 1 \times 30 = 30 k W h$
Total cost of electrical energy $= 30 \times 3.40 = R s 102$

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