Statement 1 The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic…
Statement 1 The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil.
and Statement 2 Soft iron has a high magnetic permeability and cannot be easily magnetized or demagnetized.
Statement 1 is true, Statement 2 is true, Statement 2 is a correct explanation for Statement 1.
Statement 1 is true, Statement 2 is true, Statement 2 is not a correct explanation for Statement 1.
Statement 1 is true, Statement 2 is false.
Statement 1 is false, Statement 2 is true
Solution
$c \phi=B I N A$
$
\therefore \phi=\left(\frac{B N A}{c}\right) 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.
$\therefore$ correct option is (c)