List of top Physics Questions on Resistance asked in JEE Advanced

Consider two identical galvanometers and two identical resistors with resistance $R$. If the internal resistance of the galvanometers $R _{ C }< R / 2$, which of the following statement(s) about any one of the galvanometers is(are) true?

A cell has terminal voltage $2\, V$ in open circuit and internal resistance of the given cell is $2O$. If $4\, A$ of current is flowing between points $P$ and $Q$ in the circuit and then the potential difference between $P$ and $Q$ is

Two ideal batteries of $emf V _{1}$ and $V _{2}$ and three resistances $R _{1}, R _{2}$ and $R _{3}$ are connected as shown in the figure. The current in resistance $R _{2}$ would be zero if

A $d.c$. battery of $V$ volt is connected to a series combination of a resistor $R$ and an ideal diode $D$ as shown in the figure below. The potential difference across $R$ will be