Question

Assertion (A) The coil is bound over the metallic frame in moving coil galvanometer.
Reason (R) The metallic frame helps in making steady deflection without any oscillation.

• A. Both assertion and reason are true and reason is the correct explanation of assertion
• B. Both assertion and reason are true but reason is not the correct explanation of assertion
• C. Assertion is true but reason is false
• D. Both assertion and reason are false

Answer 1

Answer: (A)

Due to metallic frame, the deflection is only due to current in a coil and magnetic field, not due to vibration in the strings. If string starts oscillating, presence of metallic frame in the field makes these oscillations damped.