Question

A certain fan is capable of using 4800J of electrical energy each minute,converting 4000J of it into kinetic energy of the fan .what is the efficiency of this fan?​

Answer 1

Answer:

• Hence, the efficiency of the fan is 120%

Explanation:

Given that:

• A certain fan is capable of using 4800J of electrical energy each minute,converting 4000J of it into kinetic energy of the fan.

To find:

• the efficiency of this fan?

Solution:

We Know that

Efficiency=Output Energy/Input Energy ×100%

$= ( \frac{4800}{4000} ) \times 100\% \\ = 1.2 \\ = 1.2 \times 100 \\ = 120\%$

Hence, the efficiency of the fan is 120% Ans.

Hope it's help you.