What happens to the reading of a potentiometer if the wire is heated and its res

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Question: What happens to the reading of a potentiometer if the wire is heated and its resistance increases?

Options:

Correct Answer: Reading decreases

Solution:

If the wire is heated and its resistance increases, the reading of the potentiometer decreases because the potential gradient will be affected.

What happens to the reading of a potentiometer if the wire is heated and its resistance increases?

What happens to the reading of a potentiometer if the wire is heated and its resistance increases?

Correct Answer: Reading decreases

Step 1: Understand what a potentiometer is. It measures voltage in a circuit.
Step 2: Know that a potentiometer has a wire that can change its resistance.
Step 3: When the wire is heated, its resistance increases.
Step 4: An increase in resistance means that less current can flow through the wire.
Step 5: The potential gradient (voltage per unit length) of the wire is affected by the current.
Step 6: If the potential gradient decreases, the reading on the potentiometer also decreases.
Step 7: Therefore, when the wire is heated and its resistance increases, the reading of the potentiometer decreases.

Resistance and Potential Gradient – The relationship between resistance in a circuit and how it affects the potential difference across components.
Potentiometer Functionality – Understanding how a potentiometer measures voltage and how changes in resistance can influence its readings.