11. GCSE - Electricity Definitions

What is the primary function of an ammeter in an electrical circuit?

• To measure the potential difference across a component.

• To measure the current flowing through a component.

• To decrease the potential difference.

• To provide a path for electrons.

Which type of current flows in one direction only?

• Alternating current (ac)

• Direct current (dc)

• Static electricity

• Mains electricity

What does a light dependent resistor (LDR) do when light intensity increases?

• The resistance increases.

• The resistance decreases.

• The potential difference increases.

• The current stops flowing.

What is the role of a step-up transformer in an electrical circuit?

• To decrease the potential difference.

• To measure the potential difference.

• To increase the potential difference.

• To reduce the current flow.

Which component is used to measure the potential difference across a component in a circuit?

• Ammeter

• Voltmeter

• Thermistor

• Resistor

How does a thermistor's resistance change with increasing temperature?

• The resistance decreases.

• The resistance increases.

• The resistance remains constant.

• The resistance becomes zero.

What type of current does a typical household outlet supply?

• Direct current (dc)

• Alternating current (ac)

• Static electricity

• Battery current