P2 4.3 Uses and dangers of static electricity

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Presentation transcript:

P2 4.3 Uses and dangers of static electricity If the voltage is high enough the air molecules will ionise and a spark discharge occurs. - Ionisation is the ability to remove electrons from atoms leaving a trail of positive ions.

DISCHARGING UNSAFE STATIC Electrons are transferred from the 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 caused the huge explosion in December 2005 at the Buncefield oil depot North of London

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

HOW A PHOTOCOPIER WORKS ORIGINAL Copying plate is charged ORIGINAL is projected on to copying plate

HOW A PHOTOCOPIER WORKS ORIGINAL Copying plate is charged ORIGINAL is projected on to copying plate Light makes charge leak away Black powder attaches to remaining charges Powder is transferred to copying paper

Powder is transferred to copying paper Black powder attaches to remaining charges Light makes charge leak away Paper is heated to ‘fix’ image