Question

A typical person can maintain a steady energy expenditure of 400 W on a bicycle. Assuming a typical efficiency for the body and a generator that is 85% efficient, what useful electric power could you produce with a bicycle-powered generator? Express your answer to two significant figures and include the appropriate units.

Answer 1

Answer:

we will get 340 W of output power when there is an input energy of 400 W with 85% efficient generator

Explanation:

As we know that efficiency of the generator is given as 85 %

so we can define efficiency of the generator as

$efficiency = \frac{work \: output}{input\: energy} \times$ 100

so here we know that efficiency is 85 %

so it shows that it will given us 85% of output work when we give it some energy or input

So we will have

$85 = \frac{W}{400}\times 100$

$W = \frac{85 \times 400}{100}$

$W = 340 W$

So we will get 340 W of output power when there is an input energy of 400 W with 85% efficient generator