$$e = 1.60 \times 10$$^{-19}$$\ \mathrm{C}$$

Question 1

Which of the following statements best describes the difference between conductors and insulators?

Accepted Answer

Conductors allow electric charges to move freely, while insulators restrict the movement of electric charges.

Question 2

Which of the following is the correct formula for the quantization of electric charge?

Accepted Answer

$$q = ne$$

Question 3

A glass rod is rubbed with silk and becomes positively charged. What happens to the electrons?

Accepted Answer

Electrons are transferred from the glass rod to the silk.

Question 4

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

Accepted Answer

$$e = 1.60 	imes 10$$^{-19}$$\ \mathrm{C}$$

Question 5

Which of the following best explains why your hair stands up after rubbing a balloon on your head?

Accepted Answer

Electrostatic repulsion between like charges on individual hairs causes them to stand apart.

Question 6

Which of the following is NOT a fundamental force in nature?

Accepted Answer

Friction

Question 7

A neutral atom has 12 protons. How many electrons does it have?

Accepted Answer

12

Question 8

Which of the following best describes the process of grounding?

Accepted Answer

Providing a path for excess charge to flow from an object to the Earth.

Question 9

What happens to the net charge of a closed system according to the law of conservation of charge?

Accepted Answer

It remains constant.

Question 10

Which of the following materials is a good conductor?

Accepted Answer

Tap water

Question 11

If a negatively charged rod is brought near a small metal ball, what happens to the electrons in the ball?

Accepted Answer

They move away from the rod, leaving the side near the rod positively charged.

Question 12

Which of the following best describes a superconductor?

Accepted Answer

A material with no resistance to the movement of charge.

Question 13

Which of the following is true about the charges in a neutral atom?

Accepted Answer

The number of protons equals the number of electrons.

Question 14

Which of the following is a property of an insulator?

Accepted Answer

Electric charges are 'frozen' in place and cannot move freely.

Question 15

What is the charge of a neutron?

Accepted Answer

$$0$$

Question 16

Which of the following best describes the Earth's magnetic field's effect on solar wind?

Accepted Answer

It deflects most solar wind particles, protecting the atmosphere.

Question 17

Which of the following is a real-world application of the strong nuclear force?

Accepted Answer

Nuclear power plants

Question 18

Which of the following best describes the polarization of an insulator when a charged object is brought near?

Accepted Answer

Atoms become polarized but there is no net charge separation.

Question 19

If the net charge of a system is $$-3.2 	imes 10$$^{-19}$$\ \mathrm{C}$$, how many excess electrons does the system have?

Accepted Answer

$$2$$

Question 20

Which of the following best explains why the human body is considered a conductor?

Accepted Answer

Free electrons in the body can move toward or away from charged objects.

Introduction to Electric Charge and Electrostatics

Study Guide - Practice Questions