Fundamentholfundamenthol
JEE Main2026Jan 28, Shift 2Physics
Q.

Which one of the following is not a measurable quantity ?

  1. A

    Voltage difference

  2. B

    Resistance

  3. C

    Voltage

  4. D

    Displacement current

Solution

Absolute voltage (electric potential at a single point) is not directly measurable — only potential differences between two points can be measured. Resistance, potential difference, and displacement current are all measurable quantities.

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