Calculating Power and Fuses _ GCSE Physics

The video tutorial explains the concept of power, measured in watts, and how it relates to energy transfer over time. It provides methods to calculate power using energy in joules and time in seconds, as well as using current and voltage. The role of fuses in protecting electrical appliances from surges is discussed, along with guidance on selecting the appropriate fuse based on current flow and appliance specifications.

What is the unit of measurement for power?

• Joules

• Watts

• Amperes

• Volts

How much power is transferred if 500 Joules of energy is used in 5 seconds?

• 50 watts

• 500 watts

• 100 watts

• 200 watts

Which of the following is needed to calculate the power of an electrical appliance?

• Energy and time

• Voltage and resistance

• Current and potential difference

• Resistance and current

What is the role of a fuse in an electrical appliance?

• To store energy

• To reduce voltage

• To prevent overheating

• To increase power

Which fuse rating would be most suitable for a 1.15 kilowatt electric fire with a voltage of 230?

• 5 Amps

• 3 Amps

• 13 Amps

• 10 Amps