The electrochemical equivalent of a material in an electrolyte depends on

For the circuit shown in the figure,calculate the resistance between the points $A$ and $B$.

$A$ cell of emf $90\,V$ is connected across a series combination of two resistors,each of $100\,\Omega$ resistance. $A$ voltmeter of resistance $400\,\Omega$ is used to measure the potential difference across one of the resistors. The reading of the voltmeter will be $.........\,V$.

In the circuit as shown in the figure, the heat produced by $6\,\Omega$ resistance due to current flowing in it is $60$ calorie per second. The heat generated across $3\,\Omega$ resistance per second will be ................. $calorie$.

For the given circuit,the $emf$ of the cells are $E_1 = 4 \, V$ and $E_2 = 8 \, V$,and their internal resistances are $0.5 \, \Omega$ and $1 \, \Omega$ respectively. Calculate the terminal voltage of each cell.

The current in a simple series circuit is $5.0 \, A$. When an additional resistance of $2.0 \, \Omega$ is inserted, the current drops to $4.0 \, A$. The original resistance of the circuit in $\Omega$ was: