Question

Explain how the moving cool galvanometer become dead beat and ballstic

Answer 1

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It is a galvanometer that can react fast to sudden surge in energy! Mechanically very sensitive to small change of cell potential for example as it is applied to the meter inputs..

Being mechanical in nature, it has a ballistic kind of meter response that is equivalent to having a very high sensitivity, rapid reacting meter needle as far as an upswing is concern. Any mechanical lags or delays associated to this type is on the down swing due probably due its mass…

Due to this characteristics, the ballistic galvanometer is preferred for measuring a more accurate peak value!