Unit I Electromagnetism

The material which possess the property of attracting iron particles by nature is called

• Ferro material

• Magnet

• Attracting material

• Non-magnet

The region in which magnetic lines of force acts is called

• Electric field

• Magnetic field

• Electro magnetic field

• Dynamic field

The temporary magnet which becomes strong magnet when current is passed through it called ______

• Electro Magnet

• Non Magnet

• Permanent Magnet

• Ferro Magnet

The magnetism retained in the material after the removal of magnetizing force is called _________ magnetism

• Retained

• Residual

• Induced

• Permanent

The magnet which retains magnetism even when the current passed through it is stopped is called ___ Magnet

• Electro

• Permanent

• Dia

• Para

The magnet that is used in loud speaker is ____ magnet

• Electro

• Permanent

• Dia

• Para

The unit of magnetic flux is

• ampere

• volt

• weber

• farad

Flux is repesented by the symbol

• A

• B

• Φ

• H

The force which establishes the magnetic flux in a magnetic circuit is called

• EMF

• MMF

• BMF

• LMF

Unit of Magneto motive force

• Flux turns

• Ampere turns

• Flux turns per metre

• volt turns