In the given circuit,the current through the $2\,\Omega$ resistance is ............ $A$.

In the given network, the potential difference between the points $B$ and $D$ is

Find the potential of $J$ with respect to $G$ in $V$.

$A$ $d.c.$ main supply of $e.m.f. \, 220 \, V$ is connected across a storage battery of $e.m.f. \, 200 \, V$ through a resistance of $1 \, \Omega$. The battery terminals are connected to an external resistance $'R'$. The minimum value of $'R'$ so that a current passes through the battery to charge it is ............... $\Omega$.

In the circuit shown,$A$ and $V$ are an ideal ammeter and an ideal voltmeter respectively. The reading of the voltmeter will be ............... $V$.

$A$ heater is rated $100\ W, 200\ V$. It is cut into two equal parts. Both parts are connected in parallel to the same $200\ V$ source. The energy released per second in this new combination is ............. $W$.