In the circuit shown in the figure,the potential difference between points $A$ and $B$ is $16\,V$. The current passing through the $2\,\Omega$ resistance will be $...........\,A$.

In the given electrical circuit,the potential difference between points $P$ and $Q$ is ........... $V$.

The equivalent resistance between the points $P$ and $Q$ of the circuit given is

$A, B$ and $C$ are voltmeters of resistance $R, 1.5R$ and $3R$ respectively as shown in the figure. When some potential difference is applied between $X$ and $Y$,the voltmeter readings are $V_A, V_B$ and $V_C$ respectively. Then

$A$ series combination of two resistors $1\,\Omega$ each is connected to a $12\,V$ battery of internal resistance $0.4\,\Omega$. The current flowing through the circuit will be ............... $A$.

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