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Physics Worksheet
Electrostatics
Section:
Name:
Electrostatics
Charging by Friction
1.
10. Electrons are being transferred ___________________
when one material rubs against another.
The one that gains electrons becomes _______________.
Electrostatics is the ___________________. It involves:
a) ___________________________________________.
b) ___________________________________________.
c) ___________________________________________.
Electric Charges
2. Based on the experiment situations, Benjamin Franklin
concluded that:
The one that lose electrons becomes ________________.
Different materials have different tendency to gain or lose
electrons
Charging by Contact
11. What will happen when two identical metal balls in the
diagram contact each other? Q
a) ___________________________________________.
b) ___________________________________________.
3.
The fundamental rule of all electrical phenomena is:
Like charges ____________, opposite charges ___________
4.
Thomson’s cathode ray experiment proved that:
_____________________________________________.
5.
Millikan’s oil drop experiment showed that:
a) ___________________________________________.
Net charge inside is ______________________________.
13. On symmetric objects, charge distributes ___________,
on non-symmetric objects, charges stay at ____________.
14. If the object is a poor conductor, charge cannot move,
so it will ______________________________________.
c) ___________________________________________.
15. Three identical metal balls A, B, and C. Ball A has 4 C,
and both ball B and C are neutral. If ball A contacts ball B
momentarily, and then ball B contacts ball C
momentarily, what will be the charge on all three balls
afterward?
_____________________________________________.
7.
______________________________________________.
b) ___________________________________________.
Millikan’s oil drop experiment proved that:
6.
12. If an object is good conductor, the charge will spread to
The SI unit of charge is _____________, symbol _____
The charge of an electron is ______________________
The charge of a proton is ________________________
4C
4
A
B
C
____________ ______________ _____________
16. Write down the Law of conservation of charge.
The charge of a neutron is _______________________
________________________________________________
8.
1 C is the charge of _____________________electrons.
________________________________________________
Charging an Object
9. There are three ways to charge an object:
1) Electrons are being transferred when one material rubs
against another
_________________________________________________
2) Electrons can be transferred from one material to another
by simply touching
_________________________________________________
3) A charged object can be used to charge another object
without contact is called:
_________________________________________________
Mr. Lin
17. When a charged rod touched an insulator at B, where
can you find the highest density of charges?
________________
18. When a charged rod touched a metal at B, where can
you find the highest density of charges?
________________
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