Assertion: In a shunted galvanometer, only $10 \%$ current passes through the galvanometer. The resistance of the galvanometer is $G$. Then the resistance of the shunt is $\frac{G}{9}$.

Reason: If $\mathrm{S}$ is the resistance of the shunt, then voltage across $S$ and $G$ is same.

A small cylindrical soft iron piece is kept in a galvanometer so that

In a moving coil galvanometer, the deflection of the coil $\mathrm{\theta }$ is related to the electrical current $I$ by the relation.

OR

If in a moving coil galvanometer, a current I produces a deflection $\mathrm{\theta },$ then 

The resistance of an ideal ammeter is 

Assertion: Higher the range, greater is the resistance of ammeter.

Reason: To increase the range of ammeter, additional shunt needs to be used across it. 

In an ammeter $0.2 \%$ of main current passes through the galvanometer. If resistance of galvanometer is $G,$ the resistance of ammeter will be 

The resistance of a galvanometer is $90 \mathrm{ohm}$ . If only $10\%$ of the main current may flow through the galvanometer, in which way and of what value, a resistor is to be used? 

Resistance of galvanometer is $500 \mathrm{\Omega }$. The effective resistance of an ammeter with a shunt is $25 \mathrm{\Omega }$. What is the value of a shunt?

A galvanometer whose resistance is,$120 \mathrm{\Omega }$, gives full-scale deflection with a current of$0.05 \mathrm{A}$ so that it can read a maximum current of$10 \mathrm{A}$ . Shunt resistance is added in parallel with it. The resistance of the ammeter so formed iS