$A$ 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 ................... $A$.

When a resistor of $11 \Omega$ is connected in series with an electric cell,the current flowing in it is $0.5 \ A$. Instead,when a resistor of $5 \Omega$ is connected to the same electric cell in series,the current increases by $0.4 \ A$. The internal resistance of the cell is (in $Omega$)

Two resistors of $200\ k\Omega$ and $1\ M\Omega$ form a potential divider circuit. If the potentials at the two ends are $+3\ V$ and $-15\ V$,the voltage at the junction will be ............... $V$.

The potential difference $(V_A - V_B)$ between the points $A$ and $B$ in the given figure is ............ $V$.

Consider the circuit given here with the following parameters: $E.M.F.$ of the cell = $12\, V$,internal resistance of the cell = $2\,\Omega$,and external resistance $R = 4\,\Omega$. Which one of the following statements is true?

Resistances $R_1$ and $R_2$ are joined in parallel and a current is passed so that the amount of heat liberated is $H_1$ and $H_2$ respectively. The ratio $\frac{H_1}{H_2}$ has the value: