Coulomb's Law Review

What is the principle of conservation of charge?

• The total electric charge in an isolated system remains constant.

• Electric charge can be created and destroyed in an isolated system.

• The total electric charge in a closed system can change over time.

• Electric charge is always equal to the mass of an object.

What is Coulomb's Law?

• Coulomb's Law describes the force between two charged objects, stating that the force is directly proportional to the product of the magnitudes of the charges and inversely proportional to the square of the distance between them.

• Coulomb's Law states that the force between two objects is constant regardless of their charges or distance.

• Coulomb's Law explains that the force between two charged objects decreases linearly with distance.

• Coulomb's Law indicates that like charges attract and unlike charges repel each other, without any dependence on distance.

What does Coulomb's constant (k) represent in Coulomb's Law?

• A proportionality factor in Coulomb's Law, approximately equal to 8.99 x 10^9 N m²/C².

• A measure of the electric field strength.

• The charge of an electron in coulombs.

• The distance between two charged particles.

What is the significance of a Van de Graaff generator?

• It generates high voltages and demonstrates electrostatic principles, such as charge accumulation and repulsion.

• It is used primarily for generating low voltages in electronic circuits.

• It serves as a power source for electric vehicles.

• It is a device for measuring temperature in scientific experiments.

What is the effect of like charges on each other?

• Like charges attract each other, pulling them closer together.

• Like charges repel each other, pushing them away from one another.

• Like charges have no effect on each other, remaining neutral.

• Like charges can combine to form a neutral charge.

What happens to the force between two charges if the distance is halved?

• The force remains the same.

• The force doubles.

• The force quadruples.

• The force decreases by half.

What is the difference between conductors and insulators in terms of charge?

• Conductors allow the flow of electric charge, while insulators do not allow charge to flow easily.

• Conductors do not allow the flow of electric charge, while insulators allow charge to flow easily.

• Both conductors and insulators allow the flow of electric charge.

• Conductors and insulators are the same in terms of charge flow.

What is the role of protons and electrons in charge?

• Protons carry a negative charge, while electrons carry a positive charge.

• Protons carry a positive charge, while electrons carry a negative charge.

• Protons and electrons both carry a positive charge.

• Protons carry no charge, while electrons carry a negative charge.

What happens to the force between two charges if one charge is doubled?

• The force remains the same.

• The force decreases by half.

• The force doubles.

• The force becomes zero.

How does the strength of an electric field change with distance?

• The strength of an electric field increases as the distance from the charge increases.

• The strength of an electric field remains constant regardless of distance.

• The strength of an electric field decreases as the distance from the charge increases.

• The strength of an electric field fluctuates randomly with distance.