$A$ wire of resistance $R$ is cut into $n$ equal parts. These parts are then connected in parallel. The equivalent resistance of the combination will be

Some electric bulbs are connected in series across a $220\, V$ supply in a room. If one bulb is fused,then the remaining bulbs are connected again in series across the same supply. The illumination in the room will

Three resistances of equal values are arranged in four different configurations as shown below. Power dissipation in the increasing order is

Consider the combination of resistors as shown in the figure and pick out the correct statement.

$A$ regular hexagon is formed by six wires each of resistance $r \Omega$ and the corners are joined to the centre by wires of the same resistance. If the current enters at one corner and leaves at the opposite corner,the equivalent resistance of the hexagon between the two opposite corners will be:

The resistors of resistances $2 \ \Omega$,$4 \ \Omega$,and $8 \ \Omega$ are connected in parallel. The equivalent resistance of the combination will be: