It’s an electrostatic voltmeter in which an assembly of figure – 8 – shaped metal plates rotates between the plates of a stationary assembly when a voltage is applied between the assemblies.
The length of the arc of rotation is proportional to the electrostatic attraction and thus, to the applied voltage.
A. varmeter
B. variometer
C. potentiometer
D. Kelvin voltmeter
Show Answer
Answer: D
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