Question

Zero error of the ammeter​

Answer 1

Answer:

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Zero error :-

If the pointer of the ammeter or voltmeter is exactly at zero, when it is not connected to the circuit, then the instrument has zero error. If the pointer is above the zero mark, the the zero error is negative. The number of divisions it is above the zero mark are to be subtracted from the reading.

Least count for a measuring instrument means the smallest value that can be measured using the instrument.Least count gives the resolution of the instrument. Ammeter or Voltmeter is said to have zero error if their pointer doesn't read zero when it is supposed to read i.e. when not connected to the circuit.