Question

The sensitivity of a tangent galvanometer is increased if

• A. (a) Number of turn decreases
• A. (b) Number of turn increases
• A. (c) Field increases
• A. (d) None of the above

Answer 1

(b)

Sol. Sensitivity $S = \frac { \theta } { i } = \frac { \theta } { K \tan \theta }$where $K = \frac { 2 R B _ { H } } { \mu _ { 0 } N }$

For increasing sensitivity K should be decreased and hence number of turns should be increased.