$A$ storage battery has an $e.m.f.$ of $15\, V$ and an internal resistance of $0.05\, \Omega$. Its terminal voltage when it is delivering $10\, A$ of current is ............... $V$.

Two wires of the same material have lengths in the ratio $1 : 2$ and radii in the ratio $2 : 1$. If they are connected in parallel to a battery,what is the ratio of heat produced in them?

In the electric network shown,when no current flows through the $4\, \Omega$ resistor in the arm $EB$,the potential difference between the points $A$ and $D$ will be ............... $V$.

Two resistors $400 \, \Omega$ and $800 \, \Omega$ are connected in series across a $6 \, V$ battery. The potential difference measured by a voltmeter of $10 \, k \Omega$ connected across the $400 \, \Omega$ resistor is close to $.... \, V$.

In the given electric circuit, the potential difference across $PQ$ is approximately ...... volts.

$A$ voltmeter connected across the terminals of a battery reads $5\,V$. When an ammeter is connected across the same terminals,it reads $10\,A$. If a resistor of $2\,\Omega$ is connected across the terminals of this battery,the current flowing through it will be ...........$A$.