Which of the following quantities is NOT measured in ohms?

Voltage is measured in volts, not ohms. Ohms are the units used to quantify electrical resistance, which is the opposition to the flow of current in a circuit. Conductivity, on the other hand, is a measure of a material's ability to conduct electric current and is typically expressed in siemens, which can be considered the reciprocal of resistivity (measured in ohm-meters). Resistivity is also directly related to resistance, providing a measure of how strongly a material opposes the flow of electric current. Thus, while resistance, conductivity, and resistivity can all be related to ohms, voltage stands apart as a different electrical quantity measured in volts.