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
Write true or false of the following statement.
Potential energy changes into kinetic energy when it is put to use
What is energy?
Give a reason for the following.
The efficiency of a machine is always less than 100%.
Name the commercial unit of measurement of energy.
Name the quantity whose unit is :
(a) kilowatt
(b) kilowatt-hour
What is the common name of '1 kWh' of electrical energy?
The commercial unit of energy is :
If the energy of a ball falling from a height of 10 metres is reduced by 40%, how high will it rebound?
Which one of the following requires wind energy?
The weight of a person on planet A is about half that on the earth. He can jump up to 0.4 m in height on the surface of the earth. How high he can jump on planet A?
