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Solution


Q.

Which one of the following is not a measurable quantity   [2026]
1 Resistance  
2 Voltage difference  
3 Displacement current  
4 Voltage  

Ans.

(4)

Here from voltage, question refers to potential. We can measure potential difference between two points but not potential at any point.

Note: If the potential of reference point is known then we can measure potential as well.