CUET · PHYSICS · PYQ PAPER 2025
For a metre Bridge, Choose the incorrect option from the following
- A The wire of one meter length fixed on the wooden plank is a uniform conducting wire having constant resistance per unit length.
- B Metre Bridge is not suitable to measure very low resistances.
- C Interchanging the position of the galvanometer and the cell will not change the balance point on the wire \(X / Y=\) \(\frac{l_1}{l_2}\)
- D The internal resistance of the cell affects the balancing position of null point.
Answer & Solution
Correct Answer
(D) The internal resistance of the cell affects the balancing position of null point.
Step-by-step Solution
Detailed explanation
At the null point, no current flows through the galvanometer, making the balance condition \(\left(\frac{X}{Y}=\frac{l_1}{l_2}\right)\) independent of the cell's internal resistance or emf. Options A, B, and C are correct scientific facts regarding the construction and conjugate…
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