In the given circuit,the current flowing between points $A$ and $B$ and through the battery $E_2$ is:

$A$ $DC$ source with internal resistance $R_0$ is connected to three identical resistors each of resistance $R$ as shown in the figure. If the thermal power generated in the circuit is highest,then

When a current of $4 \, A$ is passed through a cell for $2 \, minutes$,the mass deposited at the cathode is $m \, g$. If a current of $6 \, A$ is passed through the same cell for $40 \, seconds$,what mass will be deposited at the cathode?

$A$ dry cell has an $e.m.f.$ of $1.5\, V$ and an internal resistance of $0.05\,\Omega$. The maximum current obtainable from this cell for a very short time interval is ................... $A$.

In the given circuit,the potentials at points $B$,$C$,and $D$ will be:

$A$ current of $9\text{A}$ enters point $P$ of an equilateral triangle $PQR$ having three wires of $3\Omega$ each and leaves by point $R$. The currents $I_1$ and $I_2$ are respectively