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(D) When a battery of $emf$ $E$ and internal resistance $r$ is being charged,the current $I$ flows into the positive terminal of the battery.The termi

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All of the above.

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(D) When a battery of $emf$ $E$ and internal resistance $r$ is being charged,the current $I$ flows into the positive terminal of the battery.The terminal potential difference $V$ across the battery is given by the equation: $V = E + Ir$.Since $I > 0$ and $r > 0$,it follows that $V > E$. Thus,the potential difference across the charger terminals $A$ and $B$ must be greater than $E$.Because the positive terminal of the battery is connected to $A$ and the negative terminal to $B$,and current flows from $A$ to $B$ through the battery,$A$ must be at a higher potential than $B$.Inside the battery during charging,the current flows from the positive terminal to the negative terminal.Therefore,all the given statements are correct.

Column-$I$	Column-$II$
$(A)$ Electrical resistance	$(P)$ $M^1 L^3 T^{-3} A^{-2}$
$(B)$ Electrical potential	$(Q)$ $M^1 L^2 T^{-3} A^{-2}$
$(C)$ Specific resistance	$(R)$ $M^1 L^2 T^{-3} A^{-1}$
$(D)$ Specific conductance	$(S)$ None of these

$A$ battery of $emf$ $E$ is being charged from a charger such that the positive terminal of the battery is connected to terminal $A$ of the charger and the negative terminal of the battery is connected to terminal $B$ of the charger. The internal resistance of the battery is $r$.

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Match the following two columns:
Column-$I$ Column-$II$
$(A)$ Electrical resistance $(P)$ $M^1 L^3 T^{-3} A^{-2}$
$(B)$ Electrical potential $(Q)$ $M^1 L^2 T^{-3} A^{-2}$
$(C)$ Specific resistance $(R)$ $M^1 L^2 T^{-3} A^{-1}$
$(D)$ Specific conductance $(S)$ None of these

The figure shows a tetrahedron,each side of which has a resistance $r$. Choose the correct diagram$(s)$,which show a two-dimensional equivalent of the tetrahedron.

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