AnswersPhysicsCoulomb's Law

Coulomb's Law — Quiz Answers

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1
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If the force between two charges, q , separated by a distance, d , is cap f , what is the list of the other forces, from greatest to least?

A
cap y , cap z , cap w , cap x
B
cap y , cap w , cap x , cap z
C
cap z , cap y , cap w , cap x
D
cap z , cap x , cap w , cap y
2
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How do the electrical force and the gravitational force compare?

A
The electrical force is 8 point 0 times 10 to the negative 37 power times greater than the gravitational force.
B
The electrical force is 1 point 2 times 10 to the 36th power times greater than the gravitational force.
C
The electrical force is 8 point 0 times 10 to the negative 37 power times less than the gravitational force.
D
The electrical force is 1 point 2 times 10 to the 36th power times less than the gravitational force.
3

A positive charge, q sub 1 , of 5 µC is 3 times 10 to the negative 2 power m west of a positive charge, q sub 2 , of 2 µC What is the magnitude and direction of the electrical force, cap f sub e , applied by q sub 1 on q sub 2 ?

A
magnitude: 100 cap n direction: east
B
magnitude: 100 cap n direction: west
C
magnitude: 3 cap n direction: west
D
magnitude: 3 cap n direction: east
4

A negative charge, q sub 1 , of 6 µC is 0 point 0 0 2 m north of a positive charge, q sub 2 , of 3 µC What is the magnitude and direction of the electrical force, cap f sub e , applied by q sub 1 on q sub 2 ?

A
magnitude: 8 times 10 to the 1th power cap n direction: north
B
magnitude: 8 times 10 to the 1th power cap n direction: south
C
magnitude: 4 times 10 to the 4th power cap n direction: south
D
magnitude: 4 times 10 to the 4th power cap n direction: north
5

One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value. How will the electrical force between the charges compare with the original force?

A
It will decrease to one-sixth the original force.
B
It will decrease to one-thirty-sixth the original force.
C
It will increase to six times the original force.
D
It will increase to thirty-six times the original force.
6

When studying atoms, scientists can ignore the ______ force between charged particles that make up the atoms because it is many millions of times smaller than other forces in the atom.

A
Gravitational
B
Constant
C
Normal
D
Fricitional
7

Both the electrical force and the gravitational force between two objects share which relationship?

A
They are directly proportional to the square of the distance.
B
They are inversely proportional to the square of the distance.
C
They are directly proportional to mass.
D
They are inversely proportional to charge.
8

What is the equation for calculating the electrical force, cap f sub e , between two charges?

A
cap f sub e is equal to k times open paren the fraction with numerator q sub 1 q sub 2 and denominator d close paren squared
B
cap f sub e is equal to the fraction with numerator q sub 1 q sub 2 and denominator d squared
C
cap f sub e is equal to k the fraction with numerator q sub 1 q sub 2 and denominator d squared
D
cap f sub e is equal to k the fraction with numerator q sub 1 q sub 2 and denominator d
9

One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value. How will the electrical force between the charges compare with the original force?

A
It will increase to six times the original force.
B
It will increase to thirty-six times the original force.
C
It will decrease to one-sixth the original force.
D
It will decrease to one-thirty-sixth the original force.
10

Which statements correctly compare the gravitational force with the electrical force? Choose four correct answers.

A
Any two objects experience a gravitational force between them.
B
The gravitational force can be repulsive.
C
The electrical force can be attractive.
D
The electrical force can be repulsive.
E
Any two objects experience an electrical force between them.
F
The gravitational force can be attractive.
11

Which diagram is correct?

A
W
B
X
C
Y
D
Z
12

If the force between two charges, q , separated by a distance, d , is cap f , what is the list of the other forces, from greatest to least?

A
cap y , cap z , cap w , cap x
B
cap y , cap w , cap x , cap z
C
cap z , cap y , cap w , cap x
D
cap z , cap x , cap w , cap y
13

Which vector best represents the net force acting on the negative 3 cap c charge in the diagram?

A
cap w
B
cap x
C
cap y
D
cap z
14

A negative charge, q sub 1 , of 6 µC is 0 point 0 0 2 m north of a positive charge, q sub 2 , of 3 µC What is the magnitude and direction of the electrical force, cap f sub e , applied by q sub 1 on q sub 2 ?

A
magnitude: 8 times 10 to the 1th power cap n direction: south
B
magnitude: 4 times 10 to the 4th power cap n direction: south
C
magnitude: 4 times 10 to the 4th power cap n direction: north
D
magnitude: 8 times 10 to the 1th power cap n direction: north
15

Which change should Rolanda suggest to her friend to correct the error?

A
The note about mass belongs in region cap z , and the note about charge belongs in region cap x .
B
The note about charge belongs in region cap y .
C
The note about mass belongs in region cap y , and the note about infinite reach belongs in region cap z .
D
The note about infinite reach belongs in region cap y .
16

One charge is decreased to one-third of its original value, and a second charge is decreased to one-half of its original value. How will the electrical force between the charges compare with the original force?

A
It will increase to six times the original force.
B
It will increase to thirty-six times the original force.
C
It will decrease to one-thirty-sixth the original force.
D
It will decrease to one-sixth the original force.
17

Which labels belong in the regions marked cap x and cap y ?

A
cap x : Doubling will cut force in half cap y : Decreasing to half will cut force in half
B
cap x : Doubling will double force cap y : Decreasing to half will quadruple force
C
cap x : Decreasing to half will double force cap y : Doubling will cut force in half
D
cap x : Decreasing to half will quadruple force cap y : Doubling will double force
18

Both the electrical force and the gravitational force between two objects share which relationship?

A
They are inversely proportional to charge.
B
They are inversely proportional to the square of the distance.
C
They are directly proportional to mass.
D
They are directly proportional to the square of the distance.
19

How do the gravitational and electrical forces between a proton and a neutron compare?

A
The gravitational force is much larger than the electrical force for only very small distances between the particles.
B
The gravitational force is much smaller than the electrical force for only very small distances between the particles.
C
The gravitational force is much larger than the electrical force for any distance between the particles.
D
The gravitational force is much smaller than the electrical force for any distance between the particles.
20

What is the equation for calculating the electrical force, cap f sub e , between two charges?

A
cap f sub e is equal to k the fraction with numerator q sub 1 q sub 2 and denominator d
B
cap f sub e is equal to the fraction with numerator q sub 1 q sub 2 and denominator d squared
C
cap f sub e is equal to k times open paren the fraction with numerator q sub 1 q sub 2 and denominator d close paren squared
D
cap f sub e is equal to k the fraction with numerator q sub 1 q sub 2 and denominator d squared

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