Magnet

MAGNETMagnet produces magnetic field

A force pulls on ferromagnetic material

Attracts and Repels other magnets

MAGNETIC FIELDMagnetic influence of electric

current &magnetic material.

Direction & Magnitude

denoted by ‘H’

What affects the strength of magnet?

Material between magnet & metal.

Concrete slab interrupts field.

Skin,paper do not.

MAGNETIC FLUXAmount of magnetic field passing

through a surface

Represented by ‘B’

The SI unit is ‘weber’

ELECTROMAGNETS

Insulated wire around iron

Current magnetizes the coil

EARTH’S MAGNETIC FIELDIron particles around the earth.

Iron acts as coil.

North- South poles.

EARTH’S MAGNETIC FIELD

MAGNETIC COMPASSTo find direction

Two ends

A coloured end points North direction

MAGNETIC COMPASS

AURORABright band of light

Deflected charged ions from sun by the earth magnetic field

Protects Solar Wind

AURORA

AURORA

APPLICATIONSMagnetic Levitation Train

Computer Disks, Video Tapes

Magnetic bed