Question

heat generated by 40W bulb in one hour is

Answer 1

To find:

Heat generated by 40W bulb in one hour is ?

Calculation:

Power is defined as the rate of work done in unit time. In case of a bulb , it can also be represented as the the rate of heat generation in unit time.

$\therefore \: power = \dfrac{heat \: generated}{time \: taken}$

$\implies\: heat \: generated = (power) \times (time \: taken)$

Putting the values in SI units:

$\implies\: heat \: generated = (40) \times (1 \times 60 \times 60)$

$\implies\: heat \: generated = (40) \times (3600)$

$\implies\: heat \: generated = 36 \times 4 \times {10}^{3}$

$\implies\: heat \: generated =144\times {10}^{3} \: joule$

$\implies\: heat \: generated =144\:kilo joule$

So, net heat generated is 144 kJ.

Answer 2

Answer:

144000j

it's your answer

Explanation:

Hope it's helpful for you