Advertisements
Advertisements
Question
Define the term efficiency of a machine.
Advertisements
Solution
The ratio of the work done by the machine to the work done on the machine is called the efficiency of a machine
Efficiency =`"Output energy"/" Input energy"`
(Work done by a machine is called the output energy and the work done on a machine is called the input energy.)
APPEARS IN
RELATED QUESTIONS
Write true or false of the following statement.
Potential energy changes into kinetic energy when it is put to use
Fill in the blank
Cooking gas converts _______ energy into heat energy.
Fill in the blank
The S.I.unit of energy is ______
Select the correct alternatives
When a bulb lights up on passing current, the change of energy is
What do you mean by conservation of mechanical energy? State the condition when does it hold.
Define the term 'watt'.
Can you tell?
When can we say that displacement has taken place?
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?
A ball is dropped from a height of 10 m. If the energy of the ball reduces by 40% after striking the ground, how much high can the ball bounce back? (g = 10 m s–2)
Define kilowatt hour.
