Two galvanometers A and B require 3 mA and 5 mA respectively to produce the same deflection of `i_(0)` division. Then

Options

A. A and B are equally sensitive
B. Sensitiveness of B is 5/3 times that of A
C. B is more sensitive than A
D. A is more sensitive B

Answer

D

Explanation

Senstivity `S_1=theta/i` There is the same deflection `(theta)` for both galvanometers. `therefore S_ipropto 1/i therefore (S_A)/S_B=(i_B)/(i_A)=5/3 therefore S_AgtS_B`.