SP power point 6 2025

What is the unit for electromotive force (emf)?

• Ampere

• Ohm

• Volt

• Watt

What does the ampere measure in electrical terms?

• Voltage

• Resistance

• Current

• Power

Which unit is used to measure resistance?

• Volt

• Ampere

• Ohm

• Joule

What is the unit of power for an appliance?

• Joules

• Watts

• Kilowatt hours

• Amperes

What is the unit of electrical energy that is often measured in kilowatt hours for electricity bills?

• Watts

• Joules

• Amperes

• Volts

What is the relationship between watts, amps, and volts as depicted in the diagram?

• W = A × V

• W = A + V

• W = A / V

• W = V - A

If an appliance needs 3kW in a domestic property, what is the fuse size?

• 10 amp

• 12.5 amp

• 15 amp

• 20 amp

In a domestic property, an appliance has a fuse size of 3 amp. What is the maximum power rating of the appliance?

• 500w or 0.5kW

• 600w or 0.6kW

• 720w or 0.72kW

• 900w or 0.9kW

An appliance has a 5 amp fuse and needs 1.2kW of power. What is the voltage required?

• 220v

• 230v

• 240v

• 250v

What does Ohm's Law show the relationship between?

• Voltage, current, and resistance

• Power, energy, and time

• Force, mass, and acceleration

• Speed, distance, and time