SSC SSC JE Electrical 2025 Mock Test Series (Paper 1 & Paper 2) Electrical and Electronics Measurements Indicating Instruments Basic Requirements of an Instrument
Which of the following is true for the spring control as a controlling force for measuring instruments?
1
It can be used only in vertically mounted instruments.
2
Since deflection is directly proportional to the current, it has a uniform scale.
3
The instrument must be perfectly levelled.
4
It is independent of temp variations.