Free Printable Coulomb's Law and Charge High School Honors Physics

1.

What happens to the force between two charged objects if you triple the magnitude of one charge?

a)

1/3X

b)

3X

c)

1/9X

d)

9X

2.

What happens to the force between two charged objects if you reduce the distance between two objects from 30 cm to 10 cm?

a)

1/3X

b)

20X

c)

3X

d)

9X

3.

What happens to the force between two charged objects when you triple the magnitude of both charges?

a)

3X

b)

6X

c)

9X

d)

1/6X

4.

When distance increases, electrostatic force ____________; we call this relationship ____________ proportional

a)

decreases;directly

b)

decreases;inversely

c)

increases;inversely

d)

increases;directly

5.

Find the magnitude of the force between two charges of 1.0 C each which are 1.0 meter apart?

a)

9E-9 N

b)

9E9 N

c)

1.1E10 N

d)

1.1E-10 N

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)

2.5E-11 N

c)

-2.5E11 N

d)

-7.5E-10 N

7.

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

8.

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

9.

A 2-C charge and 4 -C charge attract each other with 10 N of force. How much will a 2-C charge and 8-C charge attract each other when placed the same distance apart?

a)

5 N

b)

12 N

c)

10 N

d)

20 N

10.

The electrical force between charges is strongest when the charges are

a)

close together

b)

far apart

c)

the electric force is constant everywhere.

d)

there is no pattern

11.

During a physics lab, a plastic strip was rubbed with cotton and became positively charged. The correct explanation for why the plastic strip becomes positively charged is that ...

a)

the plastic strip acquired extra protons from the cotton.

b)

the plastic strip acquired extra protons from the charging process

c)

protons were created as the result of the charging process

d)

the plastic strip lost electrons to the cotton during the charging process

12.

What is the total charge of 75.0 kg of electrons?

a)

9.23 x 10^-7C

b)

4.78 x 10-⁷C

c)

−1.32 × 10¹³ C

d)

−2.45 × 10⁷C

13.

The figure shows a neutral glass rod and a positively charged metal sphere.

Which of the following best describes the movement of charges as this glass rod touches the sphere?

a)

Positive charges move from the sphere to the glass rod.

b)

Negative charges move from the sphere to the glass rod.

c)

Negative charges move from the glass rod to the sphere.

d)

Positive charges move from the glass rod to the sphere.

14.

How many electrons are necessary to produce 1.0 C of negative charge? (e = 1.60 × 10^-19 C)

a)

6.3 × 10¹⁸

b)

6.3 × 10⁹

c)

1.6 × 10¹⁹

d)

1.6 × 10⁹

15.

In a good insulator, electrons are usually

a)

free to move around

b)

free to move around after an impurity has been added

c)

semi-free to move around

d)

tightly bound in place

16.

A repulsive force exists between which two particles?

a)

Two neutrons

b)

An electron and a neutron

c)

An electron and a proton

d)

Two protons

17.

What is the electric force between a 0.5 C charge and a 1.8 C charge when they are separated by a distance of 20 m?

a)

404,550,000 N

b)

20,227,500 N

c)

.045 N

d)

129,456 N

18.

As two oppositely charged particles approach each other, what happens to the electrical force between them?

a)

The attractive force increases

b)

The magnitude of the electric force decreases

c)

The repulsive force increases

d)

The magnitude of their charges increases

19.

What is the SI unit for charge?

a)

Joules

b)

Coulombs

c)

Newtons

d)

Meters

20.

A negative charge q₁ = -7.4 μC is located at a point X₁ = -9.0 m, a negative charge q₂ = -9.7 μC is located at a point X₂ = -3.0 m and a positive charge q₃ = 2.1 μC is located at a point X₃ = 1.0 m.
What does the free body diagram for q₁ look like?

a)

<----<----⊖

b)

⊖---->---->

c)

<----⊖---->

d)

---->⊖<----

21.

A negative charge q₁ = -7.4 μC is located at a point X₁ = -9.0 m, a negative charge q₂ = -9.7 μC is located at a point X₂ = -3.0 m and a positive charge q₃ = 2.1 μC is located at a point X₃ = 1.0 m.
What does the free body diagram for q₂ look like?

a)

<----<-----⊖

b)

⊖---->---->

c)

<----⊖---->

d)

---->⊖<----

22.

A negative charge Q₁ = -7.4 μC is located at a point X₁ = -9.0 m, a negative charge Q₂ = -9.7 μC is located at a point X₂ = -3.0 m and a positive charge Q₃ = 2.1 μC is located at a point X₃ = 1.0 m.
What is the magnitude of the force between q₁ and q₂?

a)

1.79 x 10^-2 N

b)

2.25 x 10^-2 N

c)

2.57 x 10^-2 N

d)

2.79 x 10^-2 N

23.

A negative charge q₁ = -7.4 μC is located at a point X₁ = -9.0 m, a negative charge q₂ = -9.7 μC is located at a point X₂ = -3.0 m and a positive charge q₃ = 2.1 μC is located at a point X₃ = 1.0 m.
What does the free body diagram for q₃ look like?

a)

<----<-----⊕

b)

⊕---->---->

c)

<----⊕---->

d)

---->⊕<----

24.

A negative charge Q₁ = -7.4 μC is located at a point X₁ = -9.0 m, a negative charge Q₂ = -9.7 μC is located at a point X₂ = -3.0 m and a positive charge Q₃ = 2.1 μC is located at a point X₃ = 1.0 m.
What is the magnitude of the force between q₁ and q₃?

a)

1.39 x 10^-3 N

b)

2.25 x 10^-2 N

c)

2.57 x 10^-3 N

d)

2.79 x 10^-2 N

25.

A negative charge Q₁ = -7.4 μC is located at a point X₁ = -9.0 m, a negative charge Q₂ = -9.7 μC is located at a point X₂ = -3.0 m and a positive charge Q₃ = 2.1 μC is located at a point X₃ = 1.0 m.
What is the magnitude of the force between q₂ and q₃?

a)

1.14 x 10^-2 N

b)

1.25 x 10^-2 N

c)

1.57 x 10^-2 N

d)

1.79 x 10^-2 N

Coulomb's Law and Charge High School Honors Physics

Total questions: 25

Worksheet time: 13mins

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