Question

Assertion (A): The deflection in a galvanometer is directly proportional to the current passing through it.
Reason (R): The coil of a galvanometer is suspended in a uniform radial magnetic field.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false and Reason (R) is also false.

Hint:

The deflection in a galvanometer is directly related to the current, but the suspension of the coil in a uniform magnetic field is not the only reason for this relationship.

Answer 1

The Correct Option is B

The assertion is true because the deflection in a galvanometer is indeed directly proportional to the current passing through it. This is governed by the relationship between the magnetic field and the current.
The reason is also true that the coil of the galvanometer is suspended in a uniform radial magnetic field. However, this does not directly explain why the deflection is proportional to the current. The deflection depends on the current and the magnetic field produced by the current, not just the magnetic field of the galvanometer.
Therefore, the correct answer is (B): Both assertion and reason are true but the reason is not the correct explanation for the assertion.