Statement-1: The sensitivity of a moving coil galvanometer is increased by placing a suitable magnetic material as a core inside the coil. [2008]

Question

Statement-1: The sensitivity 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. [2008]

Smart Achievers · Accepted Answer

(3)

Sensitivity of a moving coil galvanometer, $\frac{θ}{I} = \frac{N B A}{C}$

If $B$ increases by using an iron core, $\frac{θ}{I}$ i.e., sensitivity increases.

Soft iron can be easily magnetised and demagnetised.

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