In the circuit shown in the figure,

For the resistance network shown in the figure, choose the correct option(s).

Three ammeters $A, B$ and $C$ of resistances $R_A, R_B$ and $R_C,$ respectively, are joined as shown in the figure.

When some potential difference is applied across the terminals $T_1$ and $T_2,$ their readings are $I_A, I_B$ and $I_C,$ respectively, then

A battery of emf $E$ and internal resistance $r$ is connected across a resistance $R.$ Resistance $R$ can be adjusted to any zero. A graph is plotted between the current passing through the resistance $\left(I\right)$ and potential difference $\left(V\right)$ across it. Select the correct alternatives.

A cylindrical solid rod of length $L$ and radius $a$ is connected across a source of emf $V$ and negligible internal resistance as shown in the figure. The resistivity of the rod at point $P$ at a distance $x$ from the left end is given by $\rho =bx$ (where $b$ is a positive constant). The electric field at point $P$ is $\left(\frac{nV}{L^2}\right)x$. The value of $n$ is

There are six parallel plates of equal area A are arranged as shown in figure $(\mathrm{d}<<\mathrm{A}).$ The equivalent capacitance between points $2$ and $5,$ is $\alpha \frac{{ϵ}_0 A}{ d}.$ Then find the value of $\alpha$