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Electric Force

Total questions: 25

Worksheet time: 28mins

Name
Class
Date
1.
If each of the charges doubles, what happens to the electric force?
a)
Quadruples
b)
Doubles
c)
Stays the same
d)
Reduced by half
2.
If the distance between 2 charges doubles, what happens to the electrostatic force?
a)
Reduced by half
b)
Reduced by 1/4
c)
Stays the same
d)
Quadruples
3.
If the distance between two electric charges is reduced by half, what happens to the electrostatic force?
a)
Quadruples
b)
Doubles
c)
Triples
d)
Reduces by half
4.
Electrostatic force F is directly proportional to:
a)
r^2 (distance squared)
b)
q1
c)
q2
d)
both q1 and q2
5.
When distance increases, electrostatic force ____________; we call this relationship ____________ proportional
a)
decreases;directly
b)
decreases;inversely
c)
increases;inversely
d)
increases;directly
6.

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)

2.5E11 N

c)

-2.5E11 N

d)

-7.5E-10 N

7.
What variable do meters represent?
a)
Electrostatic Charge
b)
Force
c)
Distance
d)
Mass
8.
What variable do "Newtons" represent?
a)
Electrostatic Charge
b)
Force
c)
Distance
d)
Mass
9.
What variable do Coulombs represent?
a)
Electrostatic Charge
b)
Force
c)
Distance
d)
Mass
10.
Two oppositely charged particles are held in place near each other. When the particles are released, what will most likely happen?
a)
the will accelerate towards each other
b)
they will accelerate away from each other
c)
they will move towards each other at a constant speed
d)
they will move away from each other at a constant speed
11.
Two like charged particles are held in place near each other. When the particles are released, what will most likely happen?
a)
the will accelerate towards each other
b)
they will accelerate away from each other
c)
they will move towards each other at a constant speed
d)
they will move away from each other at a constant speed
12.
The Electric Force is strongest when charges are...
a)
close together
b)
far apart
c)
the electric force is constant everywhere
13.
The distance between two charges doubles at the same time that the charge on each also doubles.  What happens to the electric force?
a)
doubles
b)
quadruples
c)
cut in half
d)
no change
14.
Two charges separated by a distance of 1 meter exert a 20-N force on each other. If the charges are pulled to a 2 meter separation distance, the force on each charge will be 
a)
10 N
b)
5 N
c)
2.5 N
d)
40 N
15.
What are the two types of charges that objects may possess?
a)
+ and +
b)
+ and -
c)
+ and neutral 
d)
- and neutral 
16.
What equation is this:
FE= (k*q1*q2) / r2 
a)
Coulombs law
b)
Ohms law
c)
Newtons law
17.

According to Coulomb's Law, what will happen to the Electrostatic Force between 2 objects if the distance between them is is quadrupled?

a)

the force will decrease to 1/16 the original strength

b)

the force will increase by 16x

c)

the force will increase by 4x

d)

the force will decrease to 1/4 the original strength

18.

As shown in the figure, the charge Q is midway between two other charges. If Q= -7.5 nC what must be the charge q1 so that charge q2 remains stationary as Q and q1 are held in place?

a)

30 nC

b)

15 nC

c)

7.5 nC

d)

60 nC

19.
The transfer of what type of atomic particle is responsible for the static charges on objects?
a)
neutrons
b)
protons
c)
electrons
d)
none of these
20.
The closer the charges, the ___________ the force between them
a)
closer
b)
further
c)
stronger
d)
weaker
21.
Which part of the atom is positively charged?
a)
Proton
b)
Neutron
c)
Electron
22.

Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are EA and EB respectively and if the displacement between A and B is r then

a)

EA > EB

b)

EA < EB

c)

EA = EB / r

d)

EA = EB / r2

23.
Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.
a)
+,+
b)
+,-
c)
-,+
d)
-,-
24.

Based on the arrangement of the electric field lines in the diagram, what are the charges?

a)

both charges are the same

b)

the charges are opposite

c)

they are neutral; no charge

25.

Which statement best describes the electric fields in the image?

a)

The charges are neutral.

b)

Both charges are negative, so the field lines are alike.

c)

The field lines move toward a positive charge and away from a negative charge.

d)

The field lines move away from a positive charge and toward a negative charge.

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