Advertisements
Advertisements
प्रश्न
Answer the following in a word or two or in a sentence.
Write the formula for calculating the efficiency of a machine.
Advertisements
उत्तर
Efficiency =`"Output energy"/"Input energy"`
The percentage value of efficiency of a machine is calculated as
Efficiency =`" Output energy"/" Input energy"`× 100 %
APPEARS IN
संबंधित प्रश्न
Fill in the blank
An electric fan converts electrical energy into ______ energy.
Fill in the blank
Cooking gas converts _______ energy into heat energy.
Fill in the blank
The S.I.unit of energy is ______
What is potential energy ? State its unit.
Define the term efficiency of a machine.
How many joules are there in one kilowatt-hour?
The commercial unit of energy is :
We make useful objects from a variety of substances. Another use of substances is that we get energy from some of them.
There is a car. Its tank is full of fuel but it does not move. Why is that?
We make useful objects from a variety of substances. Another use of substances is that we get energy from some of them.
When we have run a long distance, we feel tired. We have to stop. Why is that?
The work done on an object does not depend upon the
