Question 1

Which of the following best describes the process of charging an object by induction?

Accepted Answer

Bringing a charged object near a neutral object, causing a redistribution of charges without direct contact.

Question 2

A person rubs a balloon on their hair and the balloon becomes negatively charged. What happens to the charges in the hair?

Accepted Answer

The hair loses electrons and becomes positively charged.

Question 3

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

Accepted Answer

Glass

Question 4

What is the main function of grounding (mise à la terre) in preventing static charge buildup?

Accepted Answer

It allows excess charge to flow safely into the Earth, neutralizing the object.

Question 5

According to the Bohr-Rutherford atomic model, which subatomic particle is responsible for the transfer of electric charge?

Accepted Answer

Electron

Question 6

If a negatively charged rod touches a neutral metal sphere, what will be the final charge on the sphere?

Accepted Answer

The sphere will become negatively charged.

Question 7

Which equation correctly represents the law of conservation of charge during contact charging?

Accepted Answer

$Q_{initial,1} + Q_{initial,2} = Q_{final,1} + Q_{final,2}$

Question 8

A person touches a metal doorknob after walking on a carpet and receives a shock. Which phenomenon explains this event?

Accepted Answer

Electrostatic discharge due to the movement of electrons.

Question 9

Which of the following statements about conductors and insulators is correct?

Accepted Answer

Conductors allow electrons to move freely, while insulators restrict electron movement.

Question 10

When a charged object is brought near the leaves of an electroscope, but does not touch it, what happens to the leaves?

Accepted Answer

The leaves separate due to induction.

Question 11

Which of the following best describes the electrostatic series?

Accepted Answer

A list of materials ranked by their tendency to gain or lose electrons when rubbed together.

Question 12

A negatively charged rod is brought near a neutral metal sphere, and the sphere is then grounded. What is the final charge on the sphere after the rod is removed?

Accepted Answer

Positive

Question 13

Which real-world scenario best illustrates the danger of static electricity in industry?

Accepted Answer

A fuel truck being grounded before unloading to prevent sparks.

Question 14

What is the effect of bringing a positively charged object close to a neutral electroscope?

Accepted Answer

Electrons in the electroscope move toward the top, causing the leaves to separate.

Question 15

Which of the following is NOT a method for detecting static charge?

Accepted Answer

Measuring temperature changes.

Question 16

If two identical metal spheres, one charged and one neutral, are brought into contact and then separated, what will be the charge on each sphere?

Accepted Answer

Both spheres will have equal charges of the same sign.

Question 17

Which law explains why two objects with the same type of charge repel each other?

Accepted Answer

Law of electric charges

Question 18

A scientist wants to prevent static discharge in a laboratory where sensitive electronics are assembled. What is the best method?

Accepted Answer

Increase humidity and use grounding straps.

Question 19

Which of the following equations represents the force between two point charges according to Coulomb's law?

Accepted Answer

$F = k \frac{q_1 q_2}{r^2}$

Question 20

Which statement best describes the behavior of electric field lines around a positive and a negative charge?

Accepted Answer

Field lines point away from positive charges and toward negative charges.

Les charges statiques et l'électricité statique : Concepts fondamentaux

Study Guide - Practice Questions

Study Guide - Flashcards