Coulomb's Law

Coulombs Law describes the math relationship between charges and the force between those charges (either attracting or repelling). Which option would result in attraction.

• A balloon is rubbed on a cat which causes electrons to be pulled of the cat's hair and caught on the balloon. Thus, the balloon has a net negative charge and the cat is net positive.

• Two balloons are rubbed on a cat which causes electrons to be pulled of the cat's hair and caught on the balloon. The two negative balloons are held near each other.

• A balloon is rubbed on two cats which causes electrons to be pulled of the cat's hair and caught on the balloon. The two cats are placed near each other to see what their fur does.

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NGSS.HS-PS2-4

What is used to calculate the magnitude of electric forces between charged objects?

• Newton's Law

• Coulomb's Law

• Ohm's Law

• Faraday's Law

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NGSS.HS-PS2-4

According to Coulomb's Law, the force between two point charges is inversely proportional to what?

• The square of the distance between the charges

• The product of the charges

• The sum of the charges

• The distance between the charges

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NGSS.HS-PS2-4

What does a smaller distance between charged particles result in, according to Coulomb's Law?

• A periodic change in the force of attraction

• A smaller force of attraction

• A greater force of attraction

• No change in the force of attraction

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NGSS.HS-PS2-4

Two charges, q1=2C and q2=3C, are placed 1 meter apart. What is the magnitude of the electric force between them? Use k=8.99x10⁹

Don't forget sig figs!

• 1.80x10¹⁰ N

• 5.39x10¹⁰ N

• 5x10¹⁰ N

• 2x10¹⁰ N

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NGSS.HS-PS2-4

Two charges, q1=4C and q2=6C, are placed 2 meter apart. What is the magnitude of the electric force between them? Use k=8.99x10⁹Don't forget sig figs!

• 8.88x10¹⁰ N

• 4x10¹⁰ N

• 5x10¹⁰ N

• 4.5x10¹⁰ N

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NGSS.HS-PS2-4

Two charges, q1=5.0 C and q2=3.0 C, exert a force of 6.74×10¹⁰ N on each other. What is the distance between them? You are solving for r!
Use k=8.99x10⁹

Don't forget sig figs!

• 1.4 meters

• 1 meter

• 2.0 meters

• 2 meters

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NGSS.HS-PS2-4

Two charges, q1=4.0 C and q2=6.0 C, exert a force of 5.5×10¹⁰ N on each other. What is the distance between them? You are solving for r!
Use k=8.99x10⁹

Don't forget sig figs!

• 1 meter

• 1.9 meters

• 3.9 meters

• 4 meters

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NGSS.HS-PS2-4

Two charges, q1=2. C and q2 are 3 meters apart. The electrical force between them is 3.99×10¹⁰ N. What is the magnitude of q2?
Use k=8.99x10⁹

Don't forget sig figs!

• 20 C

• 8 C

• 88 C

• 4 C

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NGSS.HS-PS2-4

How do charge signs affect the direction of the force between charged objects?

• Like charges repel each other, and unlike charges attract each other.

• Like charges attract each other, and unlike charges repel each other.

• Charge signs do not affect the direction of the force.

• The force is always attractive regardless of charge signs.

Tags

NGSS.HS-PS2-4