What happens to the null point in a potentiometer if the resistance of the wire

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Question: What happens to the null point in a potentiometer if the resistance of the wire is increased?

Options:

Correct Answer: Null point moves away from the battery

Solution:

Increasing the resistance of the wire decreases the current, which causes the null point to move away from the battery.

What happens to the null point in a potentiometer if the resistance of the wire is increased?

What happens to the null point in a potentiometer if the resistance of the wire is increased?

Step 1: Understand what a potentiometer is. It is a device used to measure voltage by balancing it against a known voltage.
Step 2: Know that the null point is the point where the voltage across the wire equals the voltage from the battery.
Step 3: Recognize that the resistance of the wire affects the current flowing through it.
Step 4: When the resistance of the wire is increased, the current flowing through the wire decreases.
Step 5: A decrease in current means that less voltage is dropped across the wire.
Step 6: Since the voltage drop across the wire is less, the null point (where the voltages balance) will move away from the battery.

Potentiometer Functionality – Understanding how the resistance of the wire affects current flow and the position of the null point.
Ohm's Law – Application of Ohm's Law to relate resistance, current, and voltage in the context of a potentiometer.