Electrical Engineering ⇒ Topic : Various Scales
Linear Scales A linear scale like a foot rule, is the simplest to read. Though termed as linear it may form a part of the arc, however the graduations will be uniformly disturbed. The moving coil electrodynamic wattmeters generally have linear scale. Moving iron instruments also have nearly linear scales.
Square low scale Some instruments like thermal instruments, electrodynamic voltmeters and ammeters follow square low scale.
Logarithmic scale Logarithmic scale as a slide rule, have the advantage of equal percentage accuracy all over the scale but are more difficult to read as compared to a linear scale due to sudden change in values of adjacent scale divisions.
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