Question

Two galvanometers $A$ and $B$ require $3mA$ and $6mA$ respectively, to produce the same deflection of $10$ divisions. Then is,

• A. $A$ is more sensitive than $B$
• B. $B$ is more sensitive than $A$
• C. $A$ and $B$ are equally sensitive
• D. Sensitiveness of $B$ is twice that of $A$

Answer 1

Answer: (A)

$A$ is more sensitive than $B$

The sensitivity ratio is given as,

$\frac{S_A}{S_B}=\frac{I_B}{I_A}$

$\frac{S_A}{S_B}=\frac{5}{3}$

$S_A>S_B$

Thus, A is more sensitive than B.