Three moving coil galvanometer A,B and C are made of coils of three different material having torsional constant `1.8xx10^(-8), 2.8xx10^(-8)` and `3.8xx10^(-8)` respectively if the three galvanometer are identical in all other respect then in which of the above cases sensitivity maximum

Options

A. all have equal senstivity
B. A
C. B
D. C

Answer

C

Explanation

Senstivity `S_i=(nAB)/K S_ipropto 1/K therefore` K is minimum for the galvanometer B.Hence its senstivity is maximum.