Forces in Nature

What is the fundamental force that causes objects to fall towards the Earth?

• gravity

• light

• friction

• magnetism

What is the SI unit of force?

• Kilogram

• Meter

• Joule

• Newton (N)

What is the force that holds electrons in orbit around the nucleus of an atom?

• Gravitational force

• Nuclear force

• Frictional force

• Electromagnetic force

What happens to the force between two charges when they are brought closer together?

• The force between two charges increases.

• The force between two charges becomes repulsive.

• The force between two charges decreases.

• The force between two charges remains the same.

In a circuit, what is the unit of electrical current?

• Ampere (A)

• Joule

• Ohm

• Volt

What is the relationship between voltage, current, and resistance in a circuit?

• V = I ^ R

• V = I * R

• V = I + R

• V = I / R

What is the function of a resistor in an electrical circuit?

• To amplify the signal in an electrical circuit.

• To store energy in an electrical circuit.

• To increase the voltage in an electrical circuit.

• To limit the flow of current in an electrical circuit.

What type of circuit has only one path for current to flow?

• Parallel circuit

• Series circuit

• Combination circuit

• Open circuit

What is the unit of electrical resistance?

• Ohm

• Ampere

• Joule

• Volt

What is the formula to calculate electrical power in a circuit?

• P = V + I

• P = V * I

• P = V / I

• P = V - I