Understanding AC and DC Power

What does AC stand for in electrical terms?

• Alternating Current

• Active Current

• Amplified Current

• Average Current

What does DC stand for in electrical terms?

• Direct Current

• Dynamic Current

• Discrete Current

• Distributed Current

Which type of current is typically used in household power supplies in Great Britain?

• DC

• AC

• Both AC and DC

• Neither AC nor DC

What is the frequency of AC mains electricity in Great Britain?

• 50 Hz

• 60 Hz

• 100 Hz

• 120 Hz

Which of the following is a characteristic of DC?

• It changes direction periodically.

• It flows in one direction only.

• It has a frequency of 50 Hz.

• It is used in household power supplies.

Which device is used to convert AC to DC?

• Transformer

• Rectifier

• Inverter

• Generator

Which device is used to convert DC to AC?

• Transformer

• Rectifier

• Inverter

• Generator

What is the typical voltage of AC mains electricity in Great Britain?

• 110 V

• 230 V

• 240 V

• 120 V

Which of the following is a common use of DC power?

• Powering household appliances

• Charging batteries

• Powering street lights

• Operating large industrial machines

What is the main advantage of AC over DC for power distribution?

• AC is safer than DC.

• AC can be easily transformed to different voltages.

• AC is more efficient than DC.

• AC is cheaper to produce than DC.