Question

Who will spend more electrical energy? 500 W TV set in 30 mins, or 600 W heater in 20 mins? (I need the steps too)

Answer 1

energy of TV = 500 *30 = 15000j
energy of heater = 600*20 = 12000j
cleary TV will consume more energy.

Answer 2

Answer: TV will spend more electrical energy.

Explanation:

Given that,

Power of TV = 500 W

Time t = 30 min

Power of heater = 600 W

Time t = 20 min

We know that,

Consumed energy is the product of the power and time.

$E = P\times t$

Energy consumed  by the TV

$E = 500 W\times 0.5\ h$

$E = 250\ Wh$

Energy consumed  by the heater

$E = 600 W\times 0.33\ h$

$E = 198\ Wh$

Hence, TV will spend more electrical energy.