Physical quantities are measurable properties in physics with defined units

Steps:

• Define a physical quantity as a property like mass or length that can be measured using standard units in physics.
• Evaluate each option: flavour is a sensory attribute, not measurable in physics; kelvin is a unit for temperature; minute is a unit for time; potential difference is a measurable electrical property.
• Confirm potential difference fits as it is quantified in volts via Ohm's law (V = IR).
• Select the option that matches the definition of a physical quantity.

Why D is correct:

• Potential difference, or voltage, is a physical quantity in electromagnetism, defined as work per unit charge (V = W/Q) and measured in volts.

Why the others are wrong:

• A: Flavour is a qualitative sensory or chemical property, not a measurable physical quantity in physics.
• B: Kelvin is the SI unit for temperature, not the quantity itself (the quantity is temperature).
• C: Minute is a unit of time, not the physical quantity (the quantity is time).

Final answer: D