WorksheetsElectrostatics
Total questions: 25
Worksheet time: 25mins
Name
Class
Date
1.
Insulators are different than conductors in that insulators ____.
a)
do not contain electrons or protons
b)
do not contain any charge
c)
have a weaker affinity for electrons
d)
do not allow charge to freely move
2.
During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...
a)
the plastic strip acquired extra protons from the cotton.
b)
the plastic strip acquired extra protons from the charging process
c)
protons were created as the result of the charging process
d)
the plastic strip lost electrons to the cotton during the charging process
3.
A balloon is rubbed against a student's hair and then touched to a wall. The balloon sticks to the wall due to
a)
magnetic forces between the particles of the balloon and the particles of the wall
b)
electrostatic forces between the particles of the balloon and the particles of the wall
c)
magnetic forces between the particles of the wall
d)
electrostatic forces between the particles of the balloon
4.
Electrostatic force F exists between two point charges. If the both charges are doubled, the force between the charges will be
a)
F
b)
4F
c)
2F
d)
F/4
5.
Which of the following is a false statement about electrostatic force.
a)
Bringing charges closer together strengthen the force.
b)
The electrostatic constant remains the same.
c)
The values of the two charges is always the same.
d)
Electrostatic force can be attractive or repulsive
6.
Two similar metal spheres, A and B, have charges of +2.0 x 10-6 coulomb and +1.0 x 10-6 coulomb, respectively. The magnitude of the electrostatic force on A due to B is 4.0N newtons. What is the magnitude of the electrostatic force on B due to A?
a)
2.0N
b)
4.0N
c)
8.0N
d)
1.0N
7.
Two like charges
a)
neutralize each other.
b)
repel each other.
c)
must be neutrons.
d)
attract each other.
8.
The charge of an electron is
a)
positive.
b)
negative.
c)
Electrons have no charge
9.
An atom loses an electron. What type of charge does it have now?
a)
positive
b)
negative
10.
An atom gains an electron. What type of charge does it have now?
a)
positive
b)
negative
c)
No charge
11.
When a balloon is rubbed on clothes it acquires a charge by ___________
a)
Induction
b)
reduction
c)
friction
d)
concuction
12.
What object allowed John Tra"voltage" to discharge his electrons?
a)
The rug
b)
The wall
c)
The door
d)
The metal doorknob
13.
When a balloon is rubbed on a sweater in what direction do the electrons move?
a)
From the sweater to the balloon
b)
From the balloon to the sweater
c)
They do not move
d)
They travel to the groud
14.
If two balloons have the same charge, what will happen if you place them close to each other?
a)
Nothing
b)
They will be attracted
c)
They will pop
d)
They will push each other away.
15.
What is the overall charge on this balloon? (They are the same so look at either one!)
a)
+3
b)
-6
c)
+6
d)
-3
16.
The SI unit of charge is
a)
the ampere
b)
the newton
c)
the coulomb
d)
the joule
17.
When distance increases, electrostatic force ____________; we call this relationship ____________ proportional
a)
decreases;directly
b)
decreases;inversely
c)
increases;inversely
d)
increases;directly
18.
A material in which electrons are not able to move easily
a)
Circuit
b)
Insulator
c)
Resistance
d)
Conductor
19.
The Electric Force is strongest when charges are...
a)
close together
b)
far apart
c)
the electric force is constant everywhere
20.
If one of the charges doubles, what happens to the force?
a)
it doubles
b)
it gets cut in half
c)
it quadruples
d)
it is cut by 1/4
21.
Which is the value of the constant in Coulomb's equation?
a)
ke = 9·10-9
b)
ke = 9.8
c)
ke = 6.67·10-11
d)
ke = 9 ·109
22.
A 5 C and 8 C are 8 m apart. What is the force between them?
a)
5.625 x 109
b)
5.625 x 10-9
c)
4.5 x 1010
d)
4.5 x 10-10
23.
A charge of 4 C and -7 C are 200 m apart. What is the force between them?
a)
6.3 x 106
b)
-6.3 x 106
c)
2.52 x 1011
d)
-2.52 x 1011
24.
Calculate the force exerted between two charged objects separated by a distance of 0.6 m. One object has a charge of -5 C and the other has a charge of +2.0 C.
a)
-1.5E-11 N
b)
2.5E-11 N
c)
-2.5E11 N
d)
-7.5E-10 N
25.
A repulsive force exists between which two particles?
a)
Two neutrons
b)
An electron and a neutron
c)
An electron and a proton
d)
Two electrons
100 %
