Question

An incandescent bulb is supplied with

100 J of energy every second and
transfers 5 J of energy by light
Calculate the efficiency of the bulb.

I need some help can you explain this to me please and thank you

Answer 1

Efficiency = 5%

Step-by-step explanation:

Given that,

Supplies energy to the bulb = 100 J

Transferred energy by the bulb = 5 J

We need to find the efficiency of the bulb. It can be given by "

`\eta=\frac{\text{useful energy out}}{\text{useful energy in}}* 100\\\\=(5)/(100)* 100\\\\=5\%`

So, the efficiency of the bulb is 5%.