A student is handling a potentiometer that has 10 wires and the balance point is obtainedon the 7th wire.To shift the balance point of the potentiometer to the 9th wire, the resistance of thepotentiometer should be
Correct answer: A. Increased.
- A. Increased.
- B. Decreased.
- C. Fixed at zero.
- D. Kept constant.
Explanation
To move the balance point from the 7th wire to the 9th wire, the resistance of the potentiometer must be increased. This is because the balance point on a potentiometer is determined by the voltage drop across its length, which is directly proportional to its resistance. Increasing the resistance allows the balance point to shift further along the potentiometer towards the 9th wire. Options B, C, and D are incorrect because decreasing, setting to zero, or keeping the resistance constant would not achieve the desired shift in the balance point.
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