Please select a subject first
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Fill in the blank using one of the word : at rest, in motion.
A person sitting in a compartment of a moving train is relative to the other person sitting by his side and is relative to the platform.
Concept: undefined >> undefined
Write true or false of the following statement.
In an electric fan, electrical energy changes into the mechanical energy.
Concept: undefined >> undefined
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Write true or false of the following statement.
Potential energy changes into kinetic energy when it is put to use
Concept: undefined >> undefined
Name five different types of motion you know.
Concept: undefined >> undefined
Write true or false of the following statement.
One form of energy cannot be converted into another form.
Concept: undefined >> undefined
Fill in the blank
An electric fan converts electrical energy into ______ energy.
Concept: undefined >> undefined
Fill in the blank
Cooking gas converts _______ energy into heat energy.
Concept: undefined >> undefined
Fill in the blank
The ability to do work is called ______
Concept: undefined >> undefined
Fill in the blank
The S.I.unit of energy is ______
Concept: undefined >> undefined
Name the type of motion being performed by Vehicle on a straight road.
Concept: undefined >> undefined
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 |
Concept: undefined >> undefined
Select the correct alternatives
When we rub our hands
Concept: undefined >> undefined
Select the correct alternatives
When a bulb lights up on passing current, the change of energy is
Concept: undefined >> undefined
Select the correct alternatives
The correct statement is
Concept: undefined >> undefined
State the unit of energy and define it.
Concept: undefined >> undefined
What is potential energy ? State its unit.
Concept: undefined >> undefined
State two factors on which the potential energy of a body at a certain height above the ground depends.
Concept: undefined >> undefined
What do you mean by conservation of mechanical energy? State the condition when does it hold.
Concept: undefined >> undefined
Match the following
| (a). A light ray passes from air to glass | (1) . speeds up |
| (b). A light ray passes from glass to water | (2). reflects red light |
| (c). Virtual image | (3). primary colours |
| (d). Red rose | (4). plane mirror |
| (e). Red, green, and blue | (5). slows down |
Concept: undefined >> undefined
Fill in the blank
Heat is a form of _______.
Concept: undefined >> undefined
