Principles of Electricity

The unit for ________ (emf). The higher the voltage the greater the force is to cause electrons to flow along the conductor (eg 240v for domestic). Fill in the blank with the correct term.

• electromotive force

• ampere

• ohm

• watt

The ampere is the unit of ________, and can be defined as the unit of quantity or volume passing down a conductor. (eg 3 amp fuse). Fill in the blank with the correct term.

• current

• resistance

• voltage

• power

The ohm is the unit of ________, which opposes the flow of current. Fill in the blank with the correct term.

• resistance

• voltage

• capacitance

• inductance

Which of the following is the unit for electromotive force (emf)?

• Ampere

• Ohm

• Volt

• Watt

Which of the following opposes the flow of current?

• Voltage

• Resistance

• Current

• Power

What is the unit of power for an appliance?

• Watt (W)

• Joule (J)

• Volt (V)

• Ampere (A)

Which of the following is used to measure how electricity bills are calculated?

• Joule

• Kilowatt hour

• Watt

• Ampere

Power is used to make an appliance work, but an appliance is never 100% efficient.

• True

• False

Fill in the blank: Today, electrical energy is generally measured in the ________, which is how electricity bills are measured.

• kilowatt hour

• ampere

• joule

• watt

According to the diagram, what does 'W' stand for in the context of electricity?

• Watts

• Amps

• Volts

• Ohms