Answers25-26 TX-Physics B-CRCoulomb's Law

Coulomb's Law Answers

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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?

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W
B
X
C
Y
D
Z
2
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The table shows the charges and the distance between five different pairs of objects.If the force between two charges, q, separated by a distance, d, is F, what is the list of the other forces, from greatest to least?

Question illustration
A
Y, Z, W, X
B
Y, W, X, Z
C
Z, Y, W, X
D
Z, X, W, Y
3

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
4

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
5

Mark creates a graphic organizer to review his notes about electrical force.

Question illustration
A
X: Decreasing to half will quadruple forceY: Doubling will double force
B
X: Doubling will cut force in halfY: Decreasing to half will cut force in half
C
X: Doubling will double forceY: Decreasing to half will quadruple force
D
X: Decreasing to half will double forceY: Doubling will cut force in half
6

Which statements correctly compare the gravitational force with the electrical force? Check all that apply.

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.
7

Which factors affect the electrical force between two objects?

A
mass and distance between them
B
charge and distance between them
C
mass and electric field strength
D
charge and mass
8

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.
9

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
10

Three charges are located at the vertices of a triangle, as shown.

Question illustration
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W
B
X
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Y
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Z

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Coulomb's Law Answers — 25-26 TX-Physics B-CR