Question 1

Which of the following statements best describes the behavior of electric charges according to Coulomb’s Law?

Accepted Answer

Like charges repel each other, and opposite charges attract each other.

Question 2

A glass rod is rubbed with silk, resulting in a positive charge on the rod and a negative charge of equal magnitude on the silk. Which principle does this demonstrate?

Accepted Answer

Charge is conserved.

Question 3

Which material would allow electrons to move freely, making it a good conductor?

Accepted Answer

Copper

Question 4

What is the magnitude of the electrostatic force between two protons separated by $$4.0 	imes 10$$^{-15}$$ m? Use e = 1.602$$ 	imes $$10^{-19} C $$and $$k = 8.99 	imes 10^9$ N·m^2$/C^2$.

Accepted Answer

$$F = 14 N$$

Question 5

Which of the following is NOT a property of conductors?

Accepted Answer

Charged particles are not free to move.

Question 6

If two identical spherical conductors touch, what happens to any excess charge?

Accepted Answer

It is shared equally between the two spheres.

Question 7

A neutral copper rod is brought near a negatively charged plastic rod. What happens to the charges in the copper rod?

Accepted Answer

Electrons in the copper rod are repelled to the far end, leaving positive charge near the plastic rod.

Question 8

Which equation correctly represents Coulomb’s Law for the force between two point charges $$q_1$$ and $$q_2$$ separated by distance $$r$$?

Accepted Answer

$$F = \frac{1}{4\pi\$$varepsilon_0$$} \frac{|q_1$||q_2$|}{r^2$}$$

Question 9

Which of the following statements about electric charge is correct?

Accepted Answer

Electric charge is quantized and can be written as $$q = ne.$$

Question 10

If three particles are arranged on a line, with two positive charges and one negative charge between them, how do you find the net force on one of the positive charges?

Accepted Answer

Add the forces as vectors, considering direction.

Question 11

Which particle in an atom is responsible for conduction in metals?

Accepted Answer

Conduction electron

Question 12

A shell of uniform charge attracts or repels a charged particle outside the shell as if:

Accepted Answer

All the shell’s charge were concentrated at the shell’s center.

Question 13

What happens to a charged particle located inside a shell of uniform charge?

Accepted Answer

It experiences no net electrostatic force from the shell.

Question 14

Which of the following is a property of superconductors?

Accepted Answer

They allow charges to move without any hindrance.

Question 15

If a non-conducting object is charged, how is the charge distributed?

Accepted Answer

It can have any given distribution, including at interior points.

Question 16

Which equation relates current $$I$$, charge $$Q$$, and time interval $$\Delta t$$?

Accepted Answer

$$I = \frac{Q}{\Delta t}$$

Question 17

A charged rod is brought near a neutral object. What is the most likely outcome?

Accepted Answer

The neutral object will be attracted to the charged rod due to induced charge.

Question 18

Which of the following best describes the charge of a neutron?

Accepted Answer

Zero

Question 19

If the distance between two point charges is doubled, what happens to the electrostatic force between them?

Accepted Answer

It is reduced to one-fourth.

Question 20

Which scenario demonstrates the principle of induced charge?

Accepted Answer

A charged rod attracts a neutral copper rod, causing charge separation in the copper.

Coulomb’s Law and Electric Charge: Study Notes for Physics II

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