The potential difference $(V_{A}-V_{B})$ between the points $A$ and $B$ in the given part of the circuit is

Kirchhoff's second law is based on the law of conservation of:

Find the current flowing through the resistance $R_1$ of the circuit shown in the figure,if the resistances are equal to $R_1=10 \Omega, R_2=20 \Omega$,and $R_3=30 \Omega$,and the potentials of points $1, 2$,and $3$ are equal to $\phi_1=10 \text{ V}, \phi_2=6 \text{ V}$,and $\phi_3=5 \text{ V}$. (in $\text{ A}$)

If in the experiment of Wheatstone's bridge,the positions of cells and galvanometer are interchanged,then the balance point will

Four resistances of $15\, \Omega, 12\, \Omega, 4\, \Omega$ and $10\, \Omega$ are connected in cyclic order to form a Wheatstone bridge network. The resistance that is to be connected in parallel with the resistance of $10\, \Omega$ to balance the network is ................. $\Omega$.

In the given circuit,find the energy stored in the coil at steady state.