$n$ equal resistors are first connected in series and then connected in parallel. The ratio of the maximum to the minimum resistance is

Calculate the equivalent resistance in the combination shown in the figure below.

The $V-I$ graph for series and parallel combination of two metallic resistors is as shown in the figure. Which graph represents parallel combination? Justify your answer.

How will you conclude that the same potential difference (voltage) exists across three resistors connected in a parallel arrangement to a battery?

Calculate the equivalent resistance between the points $A$ and $B$ in the following combination.

The diagram below shows two ways of connecting three bulbs $A, B$ and $C$ to a $220 \,V$ main in a room. Name the two arrangements. Which of them would you prefer for household electricity? Give two reasons.