Lesson 6.2

According to Coulomb's Law, when the distance increases, the electrostatic force ____________.

• increases

• decreases

• remains unchanged

• has no relationship to distance

Answer explanation

This question links to success criteria: I can predict how a change in charge or distance will affect the electric force between two objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

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

• it doubles

• it is cut in half

• it quadruples

• it is cut by 1/4

Answer explanation

This question links to success criteria: I can predict how a change in charge or distance will affect the electric force between two objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Coulomb’s law states that the force between two charged objects will __________ when the magnitude (value) of the object’s charge increases.

• increase

• decrease

• stay the same

• first increase, then decrease

Answer explanation

This question links to success criteria: I can predict how a change in charge or distance will affect the electric force between two objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

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

Answer explanation

This question links to success criteria: I can predict how a change in charge or distance will affect the electric force between two objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

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

• 5.625 x 10⁹ N

• 5.625 x 10^-9 N

• 4.5 x 10¹⁰ N

• 4.5 x 10^-10 N

Answer explanation

This question links to success criteria: I can use Coulomb’s Law to calculate the electric force acting between two charged objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Which is the value of the constant in Coulomb's equation?

• k_e = 9·10^-9 N·m²/C²

• k_e = 9.8 N·m²/C²

• k_e = 6.67·10^-11 N·m²/C²

• k_e = 9 ·10⁹ N·m²/C²

Answer explanation

This question links to success criteria: I can use Coulomb’s Law to calculate the electric force acting between two charged objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Gravity is only able to pull things. Why can the electric force push or pull?

• There are two types of electric charge. There is only one type of mass.

• the electric force depends on the distance between charges but the gravity force does not depend on the distance between masses

• There are two types of mass but only one type of charge.

• gravitational force can act over long distances, but electric force only acts over short distances

Answer explanation

This question links to success criteria: I can compare and contrast Coulomb’s Law with the Law of Universal Gravitation.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

When distance increases, both the electrostatic force and gravity ​ (a)   ; we call this relationship ​ (b)   proportional

• decreases
• inversely
• increases
• directly
• does not change
• not

Answer explanation

This question links to success criteria: I can compare and contrast Coulomb’s Law with the Law of Universal Gravitation.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

Charges of 4 C and -7 C are 200 m apart. What is the force between them?

• 6.3 x 10⁶ N

• -6.3 x 10⁶ N

• 2.52 x 10¹¹ N

• -2.52 x 10¹¹ N

Answer explanation

This question links to success criteria: I can use Coulomb’s Law to calculate the electric force acting between two charged objects.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.

the force of gravity increases when the ​ (a)   of one or both of the objects increases. The ​ (b)   increases when the charge of one or both of the objects ​ (c)   .

• mass
• electric force
• increases
• size
• electric energy
• kinetic energy
• deceases

Answer explanation

This question links to success criteria: I can compare and contrast Coulomb’s Law with the Law of Universal Gravitation.

If you got it correct place a check mark in the question results section. If you got it incorrect place an X in that section. If this was a redemption question, cross out the one X and replace it with a check mark.