Physics Practice Test (From reviewer)

According to Coulomb's Law, the force between two charged objects is directly proportional to:

• a) The product of their charges

• b) The square of the distance between them

• c) The sum of their charges

• d) The inverse of the distance between them

Two charged objects are placed twice as far apart. How does the force between them change?

• a) It doubles

• b) It quadruples

• c) It halves

• d) It becomes four times smaller

If the distance between two charged objects is tripled, how does the force between them change?

• a) It triples

• b) It becomes nine times smaller

• c) It becomes one-third

• d) It becomes one-ninth

Two charged objects have the same charge. What happens to the force between them if the distance is halved?

• a) It doubles

• b) It quadruples

• c) It halves d)

• d) It becomes four times smaller

What is the SI unit of electric charge?

• a) Ampere

• b) Coulomb

• c) Volt

• d) Ohm

Two charged objects have opposite charges. What happens to the force between them if the distance is doubled?

• a) It doubles

• b) It quadruples

• c) It halves

• d) It becomes four times smaller

Coulomb's Law is applicable to:

• a) Only point charges

• b) Only charged spheres

• c) Only charged cylinders

• d) All charged objects

The force between two charged objects is 4 N. If the distance between them is doubled, what is the new force?

• a) 1 N

• b) 2

• c) 8

• d) 16 N

Two charged objects have the same charge. What happens to the force between them if the charges are doubled?

• a) It doubles

• b) It quadruples

• c) It halves

• d) It becomes four times smaller

Coulomb's Law is a fundamental principle in which branch of physics?

• a) Thermodynamics

• b) Optics

• c) Electromagnetism

• d) Quantum mechanics