The current drawn from the battery shown in the figure is

All resistances shown in circuit are $2 \mathrm{\Omega }$ each. The current in the resistance between $D$ and $E$ is

In the circuit shown in figure, the values of $i_1, i_2$ and $i_3$ are

In the circuit shown, the current in $3 \mathrm{\Omega }$ resistance is

Under what conditions, current passing through the resistance $R$ can be increased by short-circuiting the battery of emf $E_2$. The internal resistances of the two batteries are $r_1$ and $r_2$, respectively.

In the arrangement shown, the magnitude of each resistance is $1 \mathrm{\Omega }$. The equivalent resistance between $O$ and $A$ given by

The figure shows, the variation of $V$ with $I$ at temperatures $T_1$ and $T_2$. $\left(T_1-T_2\right)$ is proportional to

The potential difference across $100 \mathrm{\Omega }$ resistance in the circuit is measured by a voltmeter of $900 \mathrm{\Omega }$ resistance. The percentage error in reading the potential difference is

In the circuit shown in the figure, when key $K_1$ is closed, the ammeter reads $I_0$ whether $K_2$ is open or closed.

But when $K_1$ is open, the ammeter reads $\frac{I_0}{2},$ when $\frac{I_0}{2}$ when $K_2$ is closed.

Assuming that ammeter resistance is much less than $R_2$, the values of $r$ and $R_1$ in Ohms are