$A$ network of four resistances is connected to a $9\,V$ battery,as shown in the figure. The magnitude of the voltage difference between the points $A$ and $B$ is .......... $V.$

For the circuit shown,the value of current at time $t=3.2 \, s$ will be ...... $A$. (Voltage distribution $V(t)$ is shown by Figure $1$ and the circuit is shown in Figure $2$)

$A$ copper voltameter is connected to a $12 \, V$ source,and $2 \, g$ of copper is deposited in $30 \, min$. If this cell is connected to a $6 \, V$ source,how much copper (in $g$) will be deposited in $45 \, min$?

$A$ $12\, V$ lead accumulator is being charged using a $24\, V$ supply with an external resistance of $2\,\Omega$. The internal resistance of the accumulator is $1\,\Omega$. Find the time in which it will store $360\, Wh$ of energy.

In the following circuit,$1 \,\Omega$ resistor dissipates power $P$. If the resistor is replaced by $9 \,\Omega$,the power dissipated in it is

In the circuit shown in the adjoining figure,the reading of ammeter $A$ is ................ $A$.