Can a supernode contain a resistor?

The resistor would typically be located outside the direct influence of the voltage source or be part of the broader circuit. When applying methods like nodal analysis, the presence of a resistor doesn't change the fact that you treat the combined nodes as a supernode. Instead, you need to consider the resistor’s effects when setting up the equations for the supernode and solving the circuit.

In summary, while a supernode simplifies the circuit analysis by combining nodes with a voltage source, resistors and other components are still part of the overall circuit and must be included in the equations you use to solve for the voltages and currents.