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Slide 2

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Two different
Effects of static
rods will attract
each other if
they have
different
charge:
Two rods made
of the same
material will
repel each
other due to
having the
same charge:…read more

Slide 3

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Use of static - Printers
Inkjet printers work by spraying charged drops of ink onto a page.
The droplets can be directed using two oppositely charged plates.
The voltage on these plates can be easily swapped or varied. The
inkjet cartridge can also moved across the page by the printer…read more

Slide 4

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Dangers of static
During refuelling the fuel gains electrons from the pipe,
making the pipe positive and the fuel negative. The resulting
voltage may cause a spark ­ bad news!
Solution: Either earth the fuel tank with a copper rod or
connect the tanker to the plane by a copper conductor.…read more

Slide 5

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Charge (Q)
As we said, electricity is when electrons move around a circuit
and carry energy with them. Each electron has a negative
CHARGE. Charge is measured in Coulombs (C). We can work
out how much charge flows in a circuit using the equation:
Charge = current x time
Q
(in C) (in A) (in s)
I T…read more

Slide 6

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Energy and charge
The amount of energy that flows in a circuit will depend on the
amount of charge carried by the electrons and the voltage
pushing the charge around:
Energy transferred = charge x voltage
(in J) (in C) (in V)
E
V Q…read more

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