In the table put three ticks (-) against the correct statements about the thermocouple.

Here are the correct statements about the thermocouple:

Statement	Tick ($\checkmark$)
Meter Z measures energy.
Meter Z measures potential difference.	$\checkmark$
Meter Z measures power.
Materials X and Y are different materials.	$\checkmark$
Materials X and Y are the same materials.
Materials X and Y are electrical conductors.	$\checkmark$
Materials X and Y are electrical insulators.

Explanation:

• A thermocouple works on the principle that a temperature difference between two junctions made of different electrical conductors generates a potential difference (voltage).
• Meter Z is used to measure this generated potential difference.
• Therefore, the materials X and Y must be different and they must be electrical conductors.