Question

which will consume more energy a 600w refrigerator working 2 hours or a bulb of 100w working for 14 hours​

Answer 1

Given: Power of Refrigerator, P = 600W

Time, t = 2hrs = 7200s

Power of Bulb, P = 100W

Time, t = 50400s

Find: We have to find the source which has more consumption energy,

Step by Step Solution:

We know the expression of power,

$Power = \dfrac{Energy}{Time} \\\\P = \dfrac{E}{t}\\\\E = P \times t$

For refrigerator,

$E = 600\times 7200\\\\E = 432\times 10^{4}J$

For Bulb,

$E = 100\times 50400\\\\E = 504\times 10^{4}J$

So, the bulb consumer more energy