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(a) Draw a labelled diagram of a moving ...

(a) Draw a labelled diagram of a moving coil galvanometer. Describe briefly its principle and working.
(b) Answer the following :
(i) Why is it necessary to introduce a cylindrical soft iron core inside the coil a galvanometer?
(ii) Increasing the current sensitivity of a galvanometer may not necessarily increase its voltage sensitivity. Explain giving reason.

Text Solution

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(b) (i) A cylindrical soft iron core is introduced inside the coil of a galvanometer so as to make the magnetic field stronger. It also helps in making the field radial .
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