# Exam 8 Numbers 6-10 Preap

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
| By Sfduke
S
Sfduke
Community Contributor
Quizzes Created: 51 | Total Attempts: 7,638
Questions: 5 | Attempts: 98

Settings

.

• 1.

### 6. Electric force and gravitational force are alike in that both forces

• A.

A. depend on charge.

• B.

B. act only when objects are touching.

• C.

C. depend on mass.

• D.

D. are field forces.

D. D. are field forces.
Explanation
Electric force and gravitational force are both field forces because they act on objects even when they are not in direct contact with each other. Electric force is the force between charged particles, while gravitational force is the force between objects with mass. Both forces can act over a distance and do not require physical contact between the objects. Therefore, the correct answer is d. are field forces.

Rate this question:

• 2.

### 7. Which of the following best represents a difference between electric force and gravitational force?

• A.

A. Gravitational force is stronger than electric force.

• B.

B. Electric force can both attract and repel.

• C.

C. Electric force is inversely proportional to the square of the distance between objects.

• D.

D. Gravitational force exists between objects that are not touching.

B. B. Electric force can both attract and repel.
Explanation
The correct answer is b. Electric force can both attract and repel. This is because electric force is caused by the interaction of charged particles, which can have positive or negative charges. Like charges repel each other, while opposite charges attract each other. In contrast, gravitational force only attracts objects and does not have the ability to repel.

Rate this question:

• 3.

### 8. Which of the following is not true for both gravitational and electric forces?

• A.

A. The inverse square distance law applies.

• B.

B. Forces are proportional to physical properties.

• C.

C. Potential energy is a function of distance of separation.

• D.

D. Forces are either attractive or repulsive.

D. D. Forces are either attractive or repulsive.
Explanation
Both gravitational and electric forces are always either attractive or repulsive. Gravitational forces are always attractive, meaning they pull objects towards each other. Electric forces can be either attractive or repulsive, depending on the charges of the objects involved. Like charges repel each other, while opposite charges attract each other. Therefore, the statement that forces are either attractive or repulsive is true for both gravitational and electric forces.

Rate this question:

• 4.

### 9. Two 1 kg spheres each carry a charge of magnitude 1 C. How does FE, the strength of the electric force between the spheres, compare with FG, the strength of their gravitational attraction?

• A.

A. FE < FG

• B.

B. FE = FG

• C.

C. FE > FG

• D.

D. If the charges on the spheres are of the same sign, then FE > FG ; but if the charges on the spheres are of opposite sign, then FE < FG.

• E.

E. Cannot be determined without knowing the distance between the spheres

C. C. FE > FG
Explanation
The electric force between the spheres, FE, is greater than the gravitational attraction, FG. This is because the electric force is determined by the magnitude of the charges and the distance between them, while the gravitational attraction is determined by the masses of the spheres and the distance between them. Since the charges on the spheres are the same and the masses are equal, the electric force will be greater than the gravitational attraction.

Rate this question:

• 5.

### 10. When comparing the force of attraction between an electron and a proton due to the electric force and gravity, it can be concluded that

• A.

A. the gravitational force is a lot stronger

• B.

B. the electric force is a lot stronger

• C.

C. the two types of forces are the same

• D.

D. they cannot be compared

• E.

E. the electric force is slightly stronger

B. B. the electric force is a lot stronger
Explanation
The correct answer is b. the electric force is a lot stronger. This is because the electric force between an electron and a proton is much stronger than the gravitational force between them. The electric force is determined by the charges of the particles, while the gravitational force is determined by their masses. Since the charge of an electron is much larger than its mass, the electric force dominates over gravity in this scenario.

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Feb 07, 2024
Quiz Edited by
ProProfs Editorial Team
• Dec 08, 2015
Quiz Created by
Sfduke

Related Topics