Gearing, blacklash, friction between moving parts and scale accuracies are generally known as

Gearing, blacklash, friction between moving parts and scale accuracies are generally known as 

(a) Instrument errors (b) Interference errors (c) Calibration errors (d) Interaction errors
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Gearing, blacklash, friction between moving parts and scale accuracies are generally known as Instrument errors

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What is the typical full-scale deflection current of a moving coil instrument?

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