magnets and work and energy

what do you mean by light energy

• the energy present in the light

• the energy present in the air

• the energy present in the water

• the energy present in the trees

name the following magnet

• horse shoe magnet

• ball magnet

• circular magnet

• bar magnet

steel is a magnetic material

true or false

• false

• true

• i dont know

• none of the above

a bar magnet has two magnetic pole the

• north, east

• south, west

• east, west

• north, south

name the magnet which was discovered first

• bar magnet

• loadstone

• steel

• cobalt

the first compass was discovered by

• Greece

• Japan

• London

• China

define energy

• the capacity to eat

• the capacity to play

• the capacity to do work

• the capacity to sleep

what is the main source of light energy

• bulb

• tube light

• sunlight

• none of the above

an electric bell produces sound from _______ energy.

• electric energy

• light energy

• kinetic energy

• sound energy

a magnet has _______ many poles

• 4

• 6

• 2

• 7