The effective resistance between $A$ and $B$ is ........... $\Omega$.

Kirchhoff's first law $(\sum i = 0)$ and second law $(\sum iR = \sum E)$,where the symbols have their usual meanings,are respectively based on:

If the internal resistance of the battery is $1\, \Omega$, then what is the reading of the ammeter?

To measure the temperature coefficient of resistivity $\alpha$ of a semiconductor,an electrical arrangement shown in the figure is prepared. The arm $BC$ is made up of the semiconductor. The experiment is being conducted at $25^{\circ} C$ and the resistance of the semiconductor arm $BC$ is $3 \ m\Omega$. Arm $BC$ is cooled at a constant rate of $2^{\circ} C / s$. If the galvanometer $G$ shows no deflection after $10 \ s$,then $\alpha$ is:

In the circuit shown in the figure,the current $I$ is (in $\,A$)

For the given circuit,the equivalent resistance between $A$ and $B$ is: