Answers3262 CR Physics B 2526Unit Test

Coulomb's Law Answers

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A positive charge, q1, of 5 µC is 3 × 10–2 m west of a positive charge, q2, of 2 µC. What is the magnitude and direction of the electrical force, Fe, applied by q1 on q2?

A
magnitude: 3 Ndirection: east
B
magnitude: 3 Ndirection: west
C
magnitude: 100 Ndirection: east
D
magnitude: 100 Ndirection: west
2
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The magnitude of the electrical force acting between a +2.4 × 10–8 C charge and a +1.8 × 10–6 C charge that are separated by 0.008 m is N, rounded to the tenths place.

Answer not available
3

A negative charge, q1, of 6 µC is 0.002 m north of a positive charge, q2, of 3 µC. What is the magnitude and direction of the electrical force, Fe, applied by q1 on q2?

A
magnitude: 8 × 101 Ndirection: south
B
magnitude: 8 × 101 Ndirection: north
C
magnitude: 4 × 104 Ndirection: south
D
magnitude: 4 × 104 Ndirection: north
4

Which statements correctly compare the gravitational force with the electrical force? Check all that apply.The gravitational force can be repulsive.The gravitational force can be attractive.The electrical force can be repulsive.The electrical force can be attractive.Any two objects experience a gravitational force between them.Any two objects experience an electrical force between them.

A
The gravitational force can be repulsive.
B
The gravitational force can be attractive.
C
The electrical force can be repulsive.
D
The electrical force can be attractive.
E
Any two objects experience a gravitational force between them.
F
Any two objects experience an electrical force between them.
5

How does the electrical force relate to the distance between two charged objects?

A
It is inversely proportional to the square of the distance.
B
It is directly proportional to the square of the distance.
C
It is inversely proportional to the distance.
D
It is directly proportional to the distance.
6

Charges of +2 µC and +3 µC are 4 mm from each other. Raina’s group draws four diagrams trying to represent the electrical force between the charges.Which diagram is correct?

Question illustration
A
W
B
X
C
Y
D
Z
7

How does the electrical force relate to the charge of an object?

A
It is inversely proportional to the square of the charge.
B
It is directly proportional to the square of the charge.
C
It is inversely proportional to the charge.
D
It is directly proportional to the charge.
8

Rolanda sees an error in her friend’s graphic organizer comparing electrical and gravitational forces.

Question illustration
A
The note about mass belongs in region Z, and the note about charge belongs in region X.
B
The note about mass belongs in region Y, and the note about infinite reach belongs in region Z.
C
The note about charge belongs in region Y.
D
The note about infinite reach belongs in region Y.
9

The direction of electrical force is based on the fact that like charges will each other.

Answer not available
10

The table lists the values of the electrical force and the gravitational force between two protons.

Question illustration
A
The electrical force is 1.2 × 1036 times less than the gravitational force.
B
The electrical force is 1.2 × 1036 times greater than the gravitational force.
C
The electrical force is 8.0 × 10–37 times less than the gravitational force.
D
The electrical force is 8.0 × 10–37 times greater than the gravitational force.

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Coulomb's Law Answers — 3262 CR Physics B 2526