Free Printable NGSS Physics IS2T3: Coulomb's Law

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NGSS Physics IS2T3: Coulomb's Law

Total questions: 33

Worksheet time: 54mins

Name

Class

Date

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

decreases;directly

decreases;inversely

increases;inversely

increases;directly

What variable is a Coulomb the unit for?

Charge

Force

Distance

Mass

What happens to the force between two charged objects when you double the distance between them?

1/2X

1/4X

What happens to the force between two charged objects if you double the distance between them and double the magnitude of one charge?

1/2X

1/6X

If each of the charges doubles, what happens to the force?

Quadruples

Doubles

Stays the same

Reduced by half

If the distance doubles, what happens to the force?

Reduced by half

Reduced by 1/4

Stays the same

Quadruples

Electrostatic force F is directly proportional to:

r^2 (distance squared)

both q1 and q2

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

decreases;directly

decreases;inversely

increases;inversely

increases;directly

What variable do Coulombs represent?

Electrostatic Charge

Force

Distance

Mass

10.

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.

increase; increase

increase; decrease

decrease; increase

decrease; decrease

11.

The plastic covering is there to:

Provide a conductor for electrical energy to flow.

Provide an insulator so that electrical energy will not pass outside of the wires.

Provide a conductor so that electrical energy can NOT flow.

Provide an insulator so that electrical energy can flow.

12.

The difference between attract and repel is that to attract is to pull something closer and repel is to push something away.

True

False

13.

How do electrons differ from protons?

They are the same thing

Electrons hold a negative charge and protons hold a positive charge.

Electrons are positively charged and protons are negatively charged.

Protons are neutral

14.

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the magnitude of charge on q2 doubles?

9.6 N

4.8 N

1.2 N

.6 N

15.

The image shows two charged particles with a force of 2.4 N. What would you predict the force of interaction would be when the distance doubles?

4.8 N

1.2 N

.6 N

.3 N

16.

The Electric Force is strongest when charges are...

close together

far apart

the electric force is constant everywhere

17.

What would a negative value for F_e mean?

The particles are moving away from each other

The particles have the same charge

The particles have opposite charges

The particles are moving towards each other

18.

Select all answer that apply:

What kinds of particles do Coulomb's Law apply to?

electrons

protons

neutrons

neutral atoms

19.

A repulsive force exists between which two particles?

Two neutrons

An electron and a neutron

An electron and a proton

Two protons

20.

The variable "r" in Coulomb's Law would have what units?

Joules

Coulombs

Newtons

Meters

21.

What does "r" measure?

the distance between the two charged objects

the amount of charge carried by the objects

the amount of force between two charged objects

the constant value for forces between the objects

22.

What does F_e stand for?

the electrostatic force

the symbol for iron

the constant for the charges

the charges of the particles

23.

What will be the units of F (or F_e)?

Newtons

Meters

Coulombs

Joules

24.

As the value of r increases, what happens to the value of F?

F increases

F decreases

F never changes, q does

Cannot know from the information

25.

What does q measure?

the distance between the two charged objects

the amount of charge carried by the object

the amount of force between two charged objects

26.

Why are there two q's in the equation?

because there are two charged objects

because there are protons and electrons

because the particles are moving away from each other

because the particles are moving towards each other

27.

What can you do to increase the value of k?

change the force

change the distance

change the charge

nothing can be done to change the value of k; it is a constant

28.

An attractive force exists between which two particles?

Two neutrons

An electron and a neutron

An electron and a proton

Two electrons

29.

A 5 C and 8 C are 8 m apart. What is the force between them?

5.625 x 10⁹

5.625 x 10^-9

4.5 x 10¹⁰

4.5 x 10^-10

30.

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

11 m

12 m

121 m

144 m

31.

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?

32.

A charge of 3 C is 27 m away from another charge. They exert a force of -2.59 x 10⁸N on each other. What is the 2nd charge?

5 C

-5 C

7 C

-7 C

33.

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.

-1.5E-11 N

2.5E-11 N

-2.5E11 N

-7.5E-10 N

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NGSS Physics IS2T3: Coulomb's Law

Total questions: 33

Worksheet time: 54mins

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