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.
A gum bottle lying on a table has no energy.
Write true or false of the following statement.
One form of energy cannot be converted into another form.
What is potential energy ? State its unit.
What do you mean by conservation of mechanical energy? State the condition when does it hold.
How many joules are there in one kilowatt-hour?
A cell converts one form of energy into another form. Name the two forms.
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?
Observe the picture and put a tick (✓) if work is done and put a cross (x) if work is not done.
 |
 |
 |
 |
 |
 |
Running water possesses ______.
