If the voltage is highenough the air molecules will ioniseand a spark dischargeoccurs.

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Ionisation is the ability to remove electrons from atoms leaving a trail of positive ions.

P2 4.3 Uses and dangers of static electricity

DISCHARGING UNSAFE STATIC

Electrons are transferred fromthe pipe to the fuel by friction.

A high voltage could cause an explosion so:* Fuel tank is earthed with a copper conductor* fuel tank and plane are connected

A spark is thought to have causedthe huge explosion in December 2005at the Buncefield oil depot North of London

A spark is thought to have causedthe huge explosion in December 2005at the Buncefield oil depot North of London

HOW A PHOTOCOPIER WORKS

ORIGINAL Copying plate is charged

ORIGINAL isprojected onto copying plate

HOW A PHOTOCOPIER WORKS

ORIGINAL Copying plate is charged

ORIGINAL isprojected onto copying plate

Light makescharge leakaway

Black powder attaches to remaining charges

Powder is transferred to copying paper

Light makescharge leakaway

Black powder attaches to remaining charges

Powder is transferred to copying paper

Paper is heated to ‘fix’ image