Electricity Quiz

What does Coulomb's Law state about the electrical force between two charged objects?

• It is directly proportional to the distance between them.

• It is directly proportional to the multiplication of the charges.

• It is independent of the charges.

• It is inversely proportional to the multiplication of the charges.

What is the unit of electric current?

• Ohm

• Volt

• Coulomb

• Ampere

What happens to similar charges according to Coulomb's Law?

• They repel each other.

• They attract each other.

• They have no effect on each other.

• They neutralize each other.

What is the formula for calculating resistance in a conductor?

• R = I + V

• R = V*I

• R = I/V

• R = V/I

What is the electric field defined as?

• Charge per unit distance.

• Electric force per unit charge.

• Resistance per unit length.

• Potential difference per unit charge.

What is the relationship between potential difference and work done?

• Potential difference is independent of work done.

• Potential difference is the energy stored in a capacitor.

• Potential difference is the charge per unit work done.

• Potential difference is the work done to move a charge.

What does capacitance measure?

• The resistance of a conductor.

• The potential difference per unit charge.

• The electric field strength.

• The charge stored per unit potential difference.

What is the dielectric constant?

• A factor that increases capacitance in a dielectric.

• A measure of electric field strength.

• A measure of a material's resistance.

• A constant for electric potential.

What is the formula for calculating the energy stored in a capacitor?

• U = V² / C

• U = ½ × C × V²

• U = C / V

• U = C × V

What is the direction of conventional current flow?

• Same as the flow of electrons.

• Opposite to the flow of electrons.

• Random direction.

• Always upward.