Statement -1 : The sensitvity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil.
Statement - 2: Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.

Options

A. If statement I is true, statement II is true: statement II is the correct explanation for statement I
B. If statement I is true, statement II is true: statement II is not a correct explanation for statement I
C. If statement I is true: statement II is false
D. If statement I is false: statement II is true

Answer

C

Explanation

`c phi =B I NA :. Phi ((BNA)/C)I` using iron core. Value of magnetic field increases. So, deflection increases for same current. Hence, sensitivity increases. Soft iron can be easily magnetized or demagnetized. `:..` Correct option is (C).