Advertisements
Advertisements
प्रश्न
What is energy?
Advertisements
उत्तर १
The ability or capacity to do work is called energy.
उत्तर २
Energy is defined as the capacity to do work. S.I unit of work is Joule.
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.
In an electric fan, electrical energy changes into the mechanical energy.
Write true or false of the following statement.
Potential energy changes into kinetic energy when it is put to use
Write true or false of the following statement.
One form of energy cannot be converted into another form.
Fill in the blank
An electric fan converts electrical energy into ______ energy.
Fill in the blank
Cooking gas converts _______ energy into heat energy.
Match the following columns
| COLUMN A | COLUMN B |
| 1. Running water | 1. heat energy |
| 2. Burning | 2. vibrations |
| 3.Energy | 3.atom bomb |
| 4.Sound energy | 4.kinetic energy |
| 5.Nuclear energy | 5.joule |
Select the correct alternatives
The correct statement is
State the unit of energy and define it.
What do you mean by conservation of mechanical energy? State the condition when does it hold.
Give a reason for the following.
The efficiency of a machine is always less than 100%.
A cell converts one form of energy into another form. Name the two forms.
Derive the relation between commercial unit of energy (kWh) and SI unit of energy (joule).
Can you tell?
What should be taken into account for measuring work?
Find out the form of energy possessed by the following thing.
A rock on the top of a hill
Write the type of energy.
What energy transfer happen in a car engine?
When a body falls freely towards the earth, then its total energy
