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WorksheetsPhysics
Total questions: 20
Worksheet time: 29mins
The S.I.unit of energy is (a)
1 joule=
When we rub our hands
Kinetic energy changes into potential energy
Potential energy changes into kinetic energy
Mechanical energy changes into heat energy
Heat energy changes into mechanical energy
Write the transformation of energy in cooking gas LPG
What is the speed of light in air or vacuum
(a) Image cannot be obtained on a screen
A plane mirror (a) reflect 100% light falling on it
The angle of incidence on a plane mirror is 30° the angle between the incident ray and reflected ray is
30°
15°
60°
90°
No medium is required for the transfer of heat by the process of (a)
In the process of convection heat travels
Sideways
In all directions
Downwards
Upwards
The temperature of a normal human body is (a) °C
Still air is an (a) of heat.
Birds produce sound due to vibration of their____
Sound requires a (a) for propagation
The sound heard after reflection is
(a)
The speed of sound in water is
332 metre per second
1500 M per second
5000 M per second
1000 metre per second
(a) is a sure test of a magnet
The path along which electricity flows is called
(a)
To light a table lamp and to run a refrigerator we use _____as the source of electricity
A freely suspended magnet rest in
North south direction
North east direction
North West direction
East west direction
