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STATIC ELECTRICITY by Mind Map: STATIC ELECTRICITY
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STATIC ELECTRICITY

Charges

types

Negative, E.G:amber & fur, The electrons transfer to objects

positive, E.G:glass & silk, electrons transfer away from objects.

When placed together.

negative with negative

positive with positive, repel

positive with negative, attract

SI unit

coulomb, 6.24 x 10^18 charges

charging

by rubbing

Amber & fur, electrons move from fur to the amber, amber=negative, fur = positive

By induction

Production of an electric charge on the surface of a conductor under the influence of an electric field.

Electric field

region which an electric charge experince a force

to sketch

must begin from positive charges to negative charges

no 2 field lines can cross

number of lines drawn leaving a positive charge or ending at a negative charge is proportional to the carge

pictures

positive & negative

positive & positive

negative &negative

the movement of positive particle if it is free to move

hazards of electrostatics

objects may get charged due to build up of charges

clothing by synthetic fibres may get charged easily, in dry environments may cause sparks resulting in a fire

rotating tyres=negative charge. metal body near it may become positively charged->sparks produced ma ignite highly flamable load(petrol)

applications of electrostatics

photocopier

page 290 of text book

laser printer

electrostatic paint spraying

give even coating of paint on a car

electrostatic precipitator

clean smoke coming out from industrial chimneys

page 292 of text book