Assertion : Earth's magnetic field does not affect the working of a moving coil galvanometer.
Reason: The earth's magnetic field is quite weak as compared to magnetic field produced in the moving coil galvanometer.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true and reason is not the correct explanation of assertion.
C. If assertion is ture but reason is false.
D. If both assertion and reason are false.

Answer

C

Explanation

The field magnet used in a moving coil The field magnet is used in a moving coil galvanometer is very strongs ,m a.gnetic Held is quite weak as compared to the magnetic field produced by the field magnet. Practically the coil rotates under the effect of the strong magnetic field du1e to the field magnet and the weak magnetic field due to the earth does not affect the worldng of the moving coil galvanometer