CUET · PHYSICS · PYQ PAPER 2023
The current sensitivity of a moving coil galvanometer can be increased by
A. Decreasing the magnetic field
B. Increasing the number of turns
C. Increasing the area of the coil
D. Inserting a soft iron core in the coil
E. Decreasing the area of the coil
Choose the correct answer from the options given below:
- A A, E Only
- B B, C, D Only
- C A, B, C Only
- D B, C Only
Answer & Solution
Correct Answer
(B) B, C, D Only
Step-by-step Solution
Detailed explanation
Current sensitivity is given by \(S_i=\frac{N B A}{k}\). To increase it, you must increase the number of turns ( \(N\) ), the coil area ( \(A\) ), or the magnetic field strength ( \(B\) ) by using a soft iron core. This makes statements B, C, and D the correct factors.
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