Modern Physics Course 1 Quizz

What is the SI unit of electric charge?

• Volt

• Coulomb

• Ohm

• Ampere

According to Coulomb's Law, what happens to the force between two charges if the distance between them is doubled?

• The force remains the same.

• The force is doubled.

• The force is halved.

• The force is quartered.

What does a Van de Graaff generator demonstrate?

• Magnetic fields

• Gravitational forces

• Electrostatic charges

• Nuclear fusion

What is the primary purpose of grounding in electrical circuits?

• To increase the circuit’s power

• To provide a reference point for voltages

• To reduce the energy consumption

• To amplify electrical signals

What property of a material opposes the flow of electric current?

• Conductance

• Capacitance

• Resistance

• Inductance

Which of the following is true for an object with a negative electric charge?

• It has an excess of protons.

• It has an excess of neutrons.

• It has an excess of electrons.

• It has no net charge.

What happens to the electric force between two charges when one of the charges is tripled?

• The force remains unchanged.

• The force triples.

• The force becomes nine times greater.

• The force is reduced to one-third.

What does the term "dielectric strength" refer to?

• The ability of a battery to maintain its charge

• The maximum electric field a material can withstand without breaking down

• The strength of a magnetic field produced by a coil

• The resistance offered by a superconductor

In a Van de Graaff generator, what is the purpose of the large metal sphere?

• To generate magnetic fields

• To accumulate and store electric charges

• To increase gravitational potential energy

• To serve as a counterweight for the belt system

How does the presence of water affect the conductivity of human skin?

• It has no effect.

• It decreases conductivity.

• It increases conductivity.

• It acts as a perfect insulator.