Static Electricity

1. STATIC
ELECTRICKERY
Presented by
Gaurav Singh Rajput
@gauravkrsrajput

2.  Have you ever stuck a balloon to the
wall after rubbing it on your head?
 Has your jumper ever made crackling
noises when you took it off?
 Have you ever got an electric shock o
ff your door knob?
 Have you ever seen lightening?

3. All these things happen
because of
Static Electricit
y

4. What is Static Electricity?
 Static electricity occurs when there is
a build up of electric charge on the sur
face of a material.
 It is called static electricity because th
e charges don’t move.
 The electricity we use everyday involv
es moving charges.

5. What is charge?
 To understand charge we have to look
at things on an extremely small scale.
 We have to try and understand things
that we can’t even see with the most p
owerful microscope.
Atoms!

6. The atom
 Everything we see around us everyday is m
ade of atoms.
 We can’t see individual atoms because the
y are so small.
 In fact the diameter of an atom is about 0.0
000000001m
 In the air in your classroom there are about
1500000000000000000000000000 atoms.

7. What is inside the atom?
 The atom is made of 3 sorts of particles.
The electron
The proton
The neutron
 We can imagine each as a tiny little ball.

8. Inside an atom
 The protons and neut
rons sit together in a
lump in the middle c
alled the nucleus.
 The electrons orbit a
round the nucleus, a
bit like the planets or
biting the Sun.
Most of the atom is empty space if ato
ms were the size of football fields, the
nucleus would be a grain of sand in the
middle and the electrons would be orbiti
ng around the edge.
.

9. Charge
 The electron is negatively charged.
 The proton is positively charged.
 The neutron has no charge, it is neutral.

10. Charge
 Most things have the same number of
electrons and protons in them.
 They don’t have any overall charge.
 If this isn’t true interesting things can h
appen.

11. How do charges behave?
 What do you know about magnets?
 2 north poles will repel each other, but
a north and a south put together will at
tract one another.
opposites attract, likes repel.

12. How do charges behave?
 Exactly the same thing happens with
charges.
 2 positive charges put together will re
pel each other.
 Put a positive charge near a negative
charge and they will attract each other
.
 A charged object may even attract a n
eutral one.

13. Static electricity
 Static electricity is caused when certai
n materials are rubbed against each o
ther.
 Electrons can be rubbed off one mater
ial and on to another.
 The material that has got extra electro
ns is now negatively charged
 The material which has lost electrons i
s positively charged.

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21. Static electricity
 It is this imbalance of positive and neg
ative charges that causes:
 Balloons to stick to walls.
 Your hair to stand on end when brush
your hair on a dry day.
 And the electric shock you sometimes
get from the door handle.

22. Your Turn to Experiment

23. Lightning

24. What causes lightning?
 Lightning is actually j
ust static electricity o
n a much larger scale
.
 The rubbing is cause
d by air moving arou
nd
 In thunderclouds bot
tom is usually negativ
e and top is positive.

25. Thunder
 When the lightning flash happens it he
ats the air to a temperature 5 times h
otter than the surface of the sun.
 This causes nearby air to expand and
vibrate forming the sound we hear as t
hunder.

26. Interesting facts
 Lightning bolts can travel at speeds of
up to 60,000 miles per second.
 Every second around 100 bolts of light
ning strike the Earth.
 One lightning bolt has enough electrici
ty to power 200,000 homes.
 You are more likely to be struck by lig
htning than be eaten by a shark.

27. Some myths
 Lightning never strikes in the same place t
wice.
 False, the Empire State Building is reported
ly struck 100 times a year.
 Wearing rubber shoes will protect me in a t
hunder storm.
 False, Lighting is too powerful to be stoppe
d by half an inch of rubber or several hundr
ed feet of rubber for that matter.
 https://www.bing.com/videos/search?q=Bill
+Nye+Static+Electricity&&view=detail&mid