1. 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.

2. 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

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

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

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

8. 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

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