Energy use in the home

Which uses more power: charging an electric car overnight or running a fridge for a year?

• Charging an electric car overnight

• Running a fridge for a year

• Both use the same amount of power

• Neither uses power

What is the unit of measurement for power in physics?

• Joules

• Newtons

• Watts

• Hertz

Power in physics is defined as how quickly what is done?

• Motion is achieved

• Energy is transferred

• Work is done

• Heat is generated

What does "Potential Difference" in a circuit refer to?

• The difference in current flow between two points

• The difference in resistance between two components

• The difference in energy between two parts of a circuit

• The total amount of energy used by the circuit

How is potential difference measured?

• Amps

• Ohms

• Volts

• Watts

What does the letter 'P' represent in the triangle diagram related to electrical equations?

• Pressure

• Power

• Potential difference

• Pulse

According to the triangle diagram, which formula represents the relationship for voltage (V)?

• V = P / I

• V = I / P

• V = P * I

• V = I + P

What does the letter 'I' stand for in the context of the triangle diagram?

• Intensity

• Impulse

• Current

• Induction

What is the formula for calculating power in an electrical circuit?

• Power = Voltage + Current

• Power = Voltage x Current

• Power = Voltage / Current

• Power = Current - Voltage

How can voltage be calculated from power and current?

• Voltage = Power x Current

• Voltage = Power + Current

• Voltage = Power / Current

• Voltage = Current - Power