Question

An electric lamp of 100 w is used daily for 5 hours per day . How much energy will consumes by the lamp in 3 days

Answer 1

E = P × t

E = 1/10 × 5 × 3

= 3/2

= 1.5 KWh

Answer 2

Explanation:

ENERGY CONSUMED:

$e = p \times t$

where in p stands for power and t stands for time taken....

power is 0.1 kilowatt.....time is 5 hours for 3 days that is 15 hours...

$e = 0.1 \times 15$

hence your answer is 1.5 joules.

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