Electric Force Between Point Charges

Practice Questions

AP Physics 1 › Electric Force Between Point Charges

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1

What is the magnitude of the electric force between two charged metals that are 3m apart, that have absolute value of the charges being 1C and 3C?

2

Determine the magnitude of the electric force between 2 protons that are 3nm apart. Also determine if this force is attractive or repulsive.

3

Two electric charges are placed apart, where and .

What is the magnitude of force between them? Is it replusive or attractive?

4

Two point charges, each having a charge of +1C, are 2 meters apart. If the distance between them is doubled, by what factor does the force between them change?

5

If we have 2 charges, and , that are apart, what is the force exerted on by if we know that has a charge of and has a charge of ?

6

A mole of electrons have a charge of , which is called Faraday's constant. Given that Faraday's constant is , determine the electric force per mole exerted by individual moles of electrons on one another separated by by . Assume charges are static. Use Coulomb's law, and assume that moles of electrons behave like a point charge.

7

What is the force exerted on a point charge of by a point charge of that is located away?

8

3charge

Three charges are shown in the given figure. Find the net force on the "top" charge due to the other two (both magnitude and direction). Let and assume all charges are away from each other.

Let be the bottom left particle, be the top particle and be the bottom right particle. Note the axis.

9

A point charge of magnitude is located 0.01m away from a point charge of magnitude . What is the electric force between the point charges?

10

Which of the following pairs of charges would exhibit the most electrostatic repulsive force?

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