Question

The workdone by the machine is given as 50 Jand the workdone on it is given
75 J. Find the value of efficiency and its percentage.
a) 60%
b) 66.7%
c) 70%
d) 77%​

Answer 1

Answer:

Its efficiency is 66.7%

Explanation:

Because,

We know

Efficiency = required form of output/ total

input energy

So. efficiency = 50 /75 = 0.667

or %efficiency = (required form of output/ total input

energy) X 100

Thus

%efficiency = 50/75 X 100 = 66.7%