Which solution is used as an electrolyte in a Voltaic cell?

Out of the two wires $X$ and $Y$ shown below,which one has greater resistance? Justify your answer.

What is the device (meter) used to measure electric potential difference called?

$A$ wire of resistance $10 \, \Omega$ is bent in the form of a closed circle. What is the effective resistance between the two points at the ends of any diameter of this circle?

Which of the following combinations of cells in series (as shown in the figure) correctly represents the arrangement to obtain maximum potential?

State $Ohm's$ law. Write the mathematical representation of $Ohm's$ law. Use this relationship to define $1\, ohm.$ List two disadvantages of connecting different electrical appliances in series.