Can we use copper wire as a potentiometer wire? Choose the correct option.

Concept of wire used in Potentiometer:

• The potential declines across the resistor in a resistive circuit, not across the conductor, because the conductor allows for easy current conduction.
• Copper is s a good conductor, it will not show a regular potential drop over its entire length.
• Using a Copper wire as a potentiometer wire will be not suitable. Because copper wire has a high-temperature coefficient of resistance and low resistivity.
• It causes a change in resistance with a slight change in temperature which further affects the experiment driven by the potentiometer.

Additional InformationPotentiometer:

It is an instrument designed to measure an unknown voltage by comparing it with a known voltage or standard voltage. It is also used for comparing the emf of two cells.

Characteristics of potentiometer:

• As it measures the unknown voltage by comparing it with standard voltage rather than by actual deflection of the pointer. This ensures a high degree of accuracy.
• The potentiometer measures the unknown voltage using null or balance conditions, hence no power is required for the measurement.
• The determination of voltage using a potentiometer is quite independent of the source resistance.