A silver wire has a resistance of $2.1 \mathrm{\Omega }$ at $27.5 °\mathrm{C}$ and a resistance of $2.7 \mathrm{\Omega }$ at $100 °\mathrm{C}$. Determine the temperature coefficient of resistivity of silver.

In a meter bridge shown in the figure, the balance point is found to be at $39.5 \mathrm{cm}$ from the end $A$ when the resistor $Y$ is of $12.5 \mathrm{\Omega }$. Determine the resistance of $X$. Why are the connections between resistors in a Wheatstone or meter bridge made of thick copper strips?

In a meter bridge shown in the figure, the balance point is found to be at $39.5 \mathrm{cm}$ from the end A when the resistor X is of $8.16 \mathrm{\Omega }$ and Y is of $12.5 \mathrm{\Omega }.$

Determine the balance point of the bridge above, if X and Y get interchanged.

In a meter bridge shown in the figure, the balance point is found to be at $39.5 \mathrm{cm}$ from the end $\mathrm{A}$ when the resistor $\mathrm{X}$ is of $8.2 \mathrm{\Omega }$ and $\mathrm{Y}$ is of $12.5 \mathrm{\Omega }$.
What happens if the galvanometer and cell are interchanged at the balance point of the bridge? Would the galvanometer show any current?