Physics Quiz for Grade 2

What is electric current?

• Flow of electric charge through a conductor

• The process of converting water into steam

• The movement of air in an enclosed space

• The sound produced by a musical instrument

How is electric current measured?

• Using a compass

• Using an ammeter

• Using a ruler

• Using a thermometer

What are the units of electric current?

• Volts (V)

• Kilograms (kg)

• Meters (m)

• Amperes (A)

What is potential difference?

• The resistance in an electric circuit

• The amount of potential energy in a circuit

• The difference in electric potential between two points in an electric circuit.

• The speed of electric current

How is potential difference related to the flow of electric current?

• Higher potential difference leads to lower current flow

• Higher potential difference leads to alternating current flow

• Higher potential difference leads to higher current flow

• Potential difference has no effect on current flow

Give an example of potential difference in everyday life.

• Plugging in an electronic device

• Using a hairdryer

• Cooking on a gas stove

• Turning on a light switch

What is Ohm's law?

• Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• Ohm's law states that the current through a conductor is proportional to the resistance

• Ohm's law states that the current through a conductor is not related to the voltage

• Ohm's law states that the current through a conductor is inversely proportional to the voltage

How is resistance related to current and voltage according to Ohm's law?

• Resistance is directly proportional to both current and voltage

• Resistance is inversely proportional to both current and voltage

• Resistance is directly proportional to voltage and inversely proportional to current

• Resistance is directly proportional to current and inversely proportional to voltage

Explain the difference between series and parallel circuits.

• Series circuits have components connected in multiple loops, while parallel circuits have a single path for the current to flow.

• Series circuits have all components connected in a single loop, while parallel circuits have multiple paths for the current to flow.

• Series circuits have components connected in a single loop, while parallel circuits have all components connected in a single loop.

• Series circuits have multiple paths for the current to flow, while parallel circuits have all components connected in a single loop.

In which type of circuit does the failure of one component affect the functioning of the entire circuit?

• Parallel circuit

• Series circuit

• Open circuit

• Combination circuit