Consider resistor of uniform cross-sectional area connected to a battery of internal resistance zero. If the length of the resistor is doubled by stretching it, then

In the circuit shown in the figure,

If the switch at point $P$ is opened (which was initially closed), choose the correct option(s).

Current through the battery in the circuit shown in the figure

In the circuit shown in figure,

In the given circuit, the value of $m$ is varying. The correct statements about the circuit are

In the given circuit, mark the correct statement/statements

In the circuit, various resistances and five batteries are connected as shown in the figure. If point $O$ is earthed,

Inside a superconducting ring, six identical resistors each of resistance $R$ are connected as shown in figure. The equivalent resistance(s),