A stray magnetic field does ' $\underline{\text { NOT' }}$ affect the deflection of moving coil galvanometer…
A stray magnetic field does ' $\underline{\text { NOT' }}$ affect the deflection of moving coil galvanometer because
magnetic field inside galvanometer is zero.
magnetic field is equal to earth's magnetic field.
magnetic field inside galvanometer is very strong.
magnetic field inside galvanometer is very weak.
Solution
The stray magnetic field does not affect the deflection of a moving coil galvanometer because:
Reason: The magnetic field inside the galvanometer is designed to be very strong due to the use of powerful magnets. This strong internal magnetic field dominates over any stray magnetic fields, ensuring accurate deflection.
Answer: (3) The magnetic field inside the galvanometer is very strong.