Q: Which of the following is the correct value for the elementary charge $$e$$?

$$e = 1.602 \times 10$$^{-19}$$\ \mathrm{C}$$

Question 1

Which of the following statements best describes the law of conservation of electric charge?

Accepted Answer

Electric charge can be transferred between objects, but the total charge in the universe remains constant.

Question 2

A neutral amber rod is rubbed with a cloth. After rubbing, the amber rod becomes negatively charged. What happens to the cloth?

Accepted Answer

The cloth becomes positively charged.

Question 3

Which of the following is the correct value for the elementary charge $$e$$?

Accepted Answer

$$e = 1.602 	imes 10$$^{-19}$$\ \mathrm{C}$$

Question 4

A positively charged glass rod is brought near a neutral conducting sphere. What happens to the charges in the sphere?

Accepted Answer

Negative charges are attracted to the side near the rod, and positive charges are repelled to the far side.

Question 5

Which of the following materials is most likely to act as an insulator?

Accepted Answer

Rubber

Question 6

If two spheres are touching and a positively charged rod is brought near them, then the spheres are separated before the rod is removed, what is the result?

Accepted Answer

One sphere becomes positively charged and the other negatively charged.

Question 7

Which statement about electric charge is correct?

Accepted Answer

Electric charge is quantized and exists in integer multiples of the elementary charge.

Question 8

A comb attracts small strips of paper from a distance after being used. What is the best explanation for this phenomenon?

Accepted Answer

The comb has become electrically charged and exerts an electrostatic force on the paper.

Question 9

Which of the following best describes the structure of a neutral lithium atom?

Accepted Answer

It has equal numbers of protons and electrons.

Question 10

What is the net charge of a carbon atom with 6 protons, 6 neutrons, and 6 electrons?

Accepted Answer

Zero

Question 11

Which of the following is true about the electrostatic force between two charges?

Accepted Answer

It decreases rapidly with increasing separation between the charges.

Question 12

A neutral metal sphere is grounded and a positively charged rod is brought near it. What is the final charge on the sphere after the ground is removed and the rod is taken away?

Accepted Answer

The sphere is left with a net negative charge.

Question 13

Which of the following is the SI unit of electric charge?

Accepted Answer

Coulomb

Question 14

What happens when a positively charged object is brought near a neutral insulator?

Accepted Answer

The insulator becomes polarized, with negative charges shifting closer to the object.

Question 15

Which of the following best explains why a Leyden jar can store large amounts of electric charge?

Accepted Answer

It separates charges on its inner and outer surfaces, creating a large potential difference.

Question 16

Which of the following is NOT a property of conductors?

Accepted Answer

They do not permit free flow of electric charge.

Question 17

A neutral conducting sphere is placed near a negatively charged rod. What is the effect on the sphere?

Accepted Answer

Positive charges in the sphere are attracted toward the rod.

Question 18

Which of the following best describes charging by induction?

Accepted Answer

Creating a net charge in an object by bringing a charged object near it and then separating parts of the object.

Question 19

If a neutral metal sphere is charged by induction using a ground connection and a positively charged rod, what is the sequence of steps?

Accepted Answer

Bring the rod near, ground the sphere, remove the ground, then remove the rod.

Question 20

Which of the following is a real-world example of static electricity?

Accepted Answer

A cat covered in packing peanuts due to attraction between charges.

Electric Charges and Forces – Study Notes for General Physics II

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