Question

It is said the power of a human are typically 10 W for a 70 kg adult. In
one year time the total energy required in kWh will be
(1) 87.6 KWh 2) 100 KWh 3) 1000 kWh 4) 1 KWh​

Answer 1

The energy required by the human is 87.6 kWh.

Explanation:

We have,

Mass of the adult, m = 70 kg

Power of the human, P = 10 W

It is required to find the total energy required. Energy required per unit time is called power of the human.

Time in one year is, t = 8760 hour

Power is given by :

$P=\dfrac{E}{t}\\\\E=P\times t\\\\E=10\times 8760 \\\\E=87600\ Wh\\or\\E=87.6\ kWh$

So, the energy required by the human is 87.6 kWh.

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Answer 2

Answer:

power = energy/time

here power = 10w

and time = 365×24 ( when in options given in watt hour)