In a circuit,$5$ percent of the total current passes through a galvanometer. If the resistance of the galvanometer is $G$,then the value of the shunt is:

$A$ galvanometer coil has $100$ turns and an area of $1 \, cm^2$. The restoring torque constant of the coil is $10^{-8} \, N-m/rad$. If the magnetic field is $5 \, T$,what is the current sensitivity?

$A$ multirange current meter can be constructed by using a galvanometer circuit as shown in the figure. We want a current meter that can measure $10 \text{ mA}$,$100 \text{ mA}$,and $1 \text{ A}$ using a galvanometer of resistance $10 \text{ } \Omega$ that produces maximum deflection for a current of $1 \text{ mA}$. Find the values of $S_1, S_2$,and $S_3$ that have to be used.

What is the resistance of an ideal ammeter?

What is the current sensitivity of a galvanometer? How can it be increased?

An ammeter reads up to $1\, A$. Its internal resistance is $0.81\, \Omega$. To increase the range to $10\, A$,the value of the required shunt is ............ $\Omega$.