Answer the following why is it necessary to introduce a cylindrical soft iron core inside the coil of a galvanometer ?

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

A small cylindrical soft iron piece is kept in a galvanometer so that

A small cylindrical soft iron piece is kept in a galvanometer so that

A small cylindrical soft iron piece is kept in a galvanometer so that

Describe the working principle of a moving coil galvanometer. Why is it necessary to use (i) a radial magnetic field and (ii) a cylindrical soft iron core in a galvanometer? Write the expression for current sensitivity of the galvanometer.

Explain why is it necessary to use cylindrically concave pole pieces in construction of moving coil galvanometer.

Describe the working principle of a moving coil galvanometer. Why is necessary to use (i) a radial magnetic field and (ii) a cylindrical soft iron core in a galvanometer ? Write the expression for current sensitivity of the galvanometer . Can a galvanometer as such be used for measuring the current ? Explain.