1. Will you be charging that?

2. (LIKE A PARTICLE’S MASS) IT IS A PROPERTY OF MATTER
THE
ELECTRIC CHARGE
OF A PARTICLE
(LIKE A PARTICLE’S MASS)
IT IS A PROPERTY OF MATTER

3. SOME PARTICLES HAVE
AN ELECTRIC CHARGE,
OTHERS DO NOT:

4. SOME PARTICLES HAVE AN ELECTRIC CHARGE, OTHERS DO NOT:
THE ELECTRON AND THE UP AND DOWN QUARKS
ARE EXAMPLES OF PARTICLES THAT
HAVE A CHARGE:
ELECTRON
CHARGE = -1
UP QUARK
CHARGE = +⅔
DOWN QUARK
CHARGE = -⅓

5. THE PHOTON AND THE NEUTRINO ARE EXAMPLES OF PARTICLES THAT
SOME PARTICLES HAVE
AN ELECTRIC CHARGE,
OTHERS DO NOT:
THE PHOTON AND THE NEUTRINO ARE EXAMPLES OF PARTICLES THAT
DO NOT HAVE A CHARGE:
PHOTON
CHARGE = 0
NEUTRINO
CHARGE = 0

6. THE QUARKS THAT MAKE IT UP
THE PROTON HAS A
NET CHARGE OF +1
DUE TO
THE QUARKS THAT MAKE IT UP +⅔ +⅔ -⅓
PROTON
CHARGE = +1

7. +⅔ +⅔ +⅔ -⅓ -⅓ -⅓ THE PROTON HAS A NET CHARGE OF +1 DUE TO
THE QUARKS THAT MAKE IT UP
THE NEUTRON HAS A
NET CHARGE OF ZERO
DUE TO
THE QUARKS THAT MAKE IT UP +⅔ +⅔ +⅔ -⅓ -⅓ -⅓
PROTON
CHARGE = +1
NEUTRON
CHARGE = 0

8. YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES

9. YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES
FOR EXAMPLE, YOU ARE PROBABLY AWARE THAT
LIKE CHARGES
for example, two negative charges

10. − YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES
FOR EXAMPLE, YOU ARE PROBABLY AWARE THAT
LIKE CHARGES
for example, two negative charges −

11. − − YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES
FOR EXAMPLE, YOU ARE PROBABLY AWARE THAT
LIKE CHARGES
for example, two negative charges − −

12. − − YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES
FOR EXAMPLE, YOU ARE PROBABLY AWARE THAT
LIKE CHARGES
for example, two negative charges − −
will REPEL each other

13. + − YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES
AND THAT, OPPOSITE CHARGES + −

14. - + YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES
AND THAT, OPPOSITE CHARGES - +

15. - + YOU ARE PROBABLY ALREADY FAMILIAR WITH SOME OF THE BEHAVIOURS OF
CHARGED PARTICLES
AND THAT, OPPOSITE CHARGES - +
will ATTRACT each other

16. A MAGNETIC FIELD* A BEHAVIOUR OF CHARGED PARTICLES
THAT YOU MAY NOT BE FAMILIAR WITH
IS WHAT HAPPENS TO THEM IN
A MAGNETIC FIELD*
*The concept of FIELDS are useful in explaining so-called “action-at-a-distance” forces. For example, a gravitational field can be used to explain the attractive force of gravity, and an electric field can be used to explain the attraction of opposite charges and the repulsion of like charges. Likewise, magnetic fields can be used to explain why like poles of two magnets repel each other and their opposite poles attract.

17. You have probably seen how iron filings line themselves up
around a bar magnet:

18. We say that the iron filings align themselves with the magnetic field
that surrounds the magnet.

19. To show what happens to charged particles
in a magnetic field,
we take
a “horseshoe” magnet…

20. To show what happens to charged particles
in a magnetic field,
we take
a “horseshoe” magnet… N

21. region where the magnetic field is concentrated.
…and let this box
outline the
region where the magnetic field is concentrated. N

22. Direction of magnetic fieldS
The field has a direction associated with it, as shown by the arrow. The direction of a magnetic field always points from the North pole to the South pole of the magnet.
Direction of magnetic field N

23. S
If we were to send two
charged particles of equal mass into the magnetic field…
Direction of magnetic field N

24. S
…one that is negatively charged…
Direction of magnetic field - N

25. S
…and one that is positively charged…
Direction of magnetic field + N

26. S
…we would find that
the negatively charged particle would be deflected in
this direction…
Direction of magnetic field - N

27. S
…we would find that
the negatively charged particle would be deflected in
this direction…
Direction of magnetic field - N

28. in the opposite direction.
…and that
the positively charged particle would be deflected by
the same amount
but
in the opposite direction.
Direction of magnetic field + N

29. in the opposite direction.
…and that
the positively charged particle would be deflected by
the same amount
but
in the opposite direction.
Direction of magnetic field +

30. in the opposite direction.
…and that
the positively charged particle would be deflected by
the same amount
but
in the opposite direction.
Direction of magnetic field +
(You should realize that using a magnet in this way could also be used to DETECT
that two UNKNOWN particles had the SAME mass but OPPOSITE charge).