CUET · PHYSICS · PYQ PAPER 2025
A coil \(C_1\) is connected to a galvanometer G. Second coil \(C_2\) is connected to a battery through a tapping key. The steady current in the coil \(C_2\) produces a steady magnetic field. As coil \(C_2\) is moved towards the coil \(C_1\), the galvanometer shows a deflection. To obtain a large deflection, one or more of the following steps can be taken:
(A) Use a rod made of soft iron inside the coil \(C_2\)
(B) Connect the coil \(C_2\) to a more powerful battery
(C) Move the arrangement of coil \(C_2\) rapidly towards the coil \(C_1\)
(D) hold the key pressed continuously
Choose the correct answer from the options given below:
- A (A), (C) and (D) only
- B (A), (B) and (C) only
- C (A), (B) and (D) only
- D (B), (C) and (D) only
Answer & Solution
Correct Answer
(B) (A), (B) and (C) only
Step-by-step Solution
Detailed explanation
(A) Use a rod made of soft iron inside the coil \(C_2\): Increases magnetic flux. (B) Connect the coil \(C_2\) to a more powerful battery: Increases current, thus increases magnetic field and flux. (C) Move the arrangement of coil \(C_2\) rapidly towards the coil \(C_1\):…
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