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Assignment in Electric Field

Total questions: 30

Worksheet time: 30mins

Name
Class
Date
1.
When distance increases, electrostatic force ____________; we call this relationship ____________ proportional
a)
decreases;directly
b)
decreases;inversely
c)
increases;inversely
d)
increases;directly
2.
What variable is a Coulomb the unit for?
a)
Charge
b)
Force
c)
Distance
d)
Mass
3.
What variable do "Newtons" represent?
a)
Electrostatic Charge
b)
Force
c)
Distance
d)
Mass
4.
What happens to the force between two charged objects when you double the distance between them?
a)
2X
b)
1/2X
c)
4X
d)
1/4X
5.
What happens to the force between two charged objects if you double the distance between them and double the magnitude of one charge?
a)
4X
b)
6X
c)
1/2X
d)
1/6X
6.
If each of the charges doubles, what happens to the force?
a)
Quadruples
b)
Doubles
c)
Stays the same
d)
Reduced by half
7.
If the distance doubles, what happens to the force?
a)
Reduced by half
b)
Reduced by 1/4
c)
Stays the same
d)
Quadruples
8.
Electrostatic force F is directly proportional to:
a)
r^2 (distance squared)
b)
q1
c)
q2
d)
both q1 and q2
9.

Recap:

Coulomb’s law states that the force between two charged objects will __________ when the magnitude of the object’s charge increases.

Coulomb’s law also states that the force between two charged objects will __________ when the distance between objects increases.

a)

increase; increase

b)

increase; decrease

c)

decrease; increase

d)

decrease; decrease

10.
The Electric Force is strongest when charges are...
a)
close together
b)
far apart
c)
the electric force is constant everywhere
11.

What does "r" measure?

a)

the distance between the two charged objects

b)

the amount of charge carried by the objects

c)

the amount of force between two charged objects

d)

the constant value for forces between the objects

12.

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

13.

A 5 C and 8 C charge give off a force of 2.5 x 109 N. What is the distance between them?

a)

11 m

b)

12 m

c)

121 m

d)

144 m

14.

Two charges of equal magnitude give off a force of -441000 N when they are 1000 m away from each other. What are the charges magnitude?

a)

5

b)

7

c)

9

d)

11

15.

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

16.
If each of the charges doubles, what happens to the force?
a)
Quadruples
b)
Doubles
c)
Stays the same
d)
Reduced by half
17.
If the distance doubles, what happens to the force?
a)
Reduced by half
b)
Reduced by 1/4
c)
Stays the same
d)
Quadruples
18.

A point charge of +3.0 X 10-7 coulomb is placed 2.0 X 10-2 meter from a second point charge of +4.0 X 10-7 coulomb. What is the magnitude of the electrostatic force on the charges?

a)

6.0 X 10-12 N

b)

3.0 X 10-10 N

c)

5.4 X 10-2 N

d)

2.7 N

19.
What is the magnitude of the electrostatic force that a charge of +3.0 X 10-5 coulomb exerts on a charge of +6.0 X 10-6 coulomb that is 0.30 meter away?
a)
1.8 X 10-3 N
b)
5.4 X 10-2 N
c)
5.4 X 100 N
d)
1.8 X 101 N
20.

Which of the following charges will attract each other?

a)

-4 μC & -5 μC

b)

4 μC & 5 μC

c)

4 C & 5 C

d)

-4 μC & 5 μC

21.

What letter is used to denote "charge"?

a)

k

b)

q

c)

r

d)

e

22.

What does the "k" represent in Coulomb's Law?

a)

charge

b)

Coulomb's Constant

c)

kilometers

d)

distance between charges

23.

What is the value of Coulomb's Constant?

a)

9 x 109 Nm2C-2

b)

8.987 Nm2C-2

c)

8.987 x 1011 Nm2C-2

d)

7.1 x 104.5 Nm2C-2

24.

What will happen to two positive charges placed near each other?

a)

They will attract.

b)

They will repel.

c)

They will not do anything.

d)

They will go out for lunch.

25.

What will happen to two negative charges placed near each other?

a)

They will attract.

b)

They will repel.

c)

They will not do anything.

d)

They will start a podcast.

26.

What will happen to a positive and a negative charge when placed near each other?

a)

They will attract.

b)

They will repel.

c)

They will not do anything.

d)

They will die tragically in a plane crash.

27.

What direction will the charge in the middle move?

a)

to the right

b)

to the left

c)

stay still

d)

it's a mystery

28.

The unit of electric field is not equivalent to

a)

N/C

b)

J/C

c)

V/m

d)

J/Coulomb.meter

29.

Electric lines of force about negative point charge are

a)

Circular, anticlockwise

b)

Circular, clockwise

c)

Radial, outward

d)

Radial, inward

30.

The electric field inside a spherical shell of uniform surface charge density is

a)

Constant, less than zero

b)

Directly proportional to the distance from the centre

c)

zero

d)

None of the above

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