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Q.
In meter bridge or Wheatstone bridge for measurement
of resistance, the known and the unknown resistances are
interchanged. The error so removed is
Current Electricity
Solution:
In meter bridge experiment, it is assumed that the resistance of the $L$ shaped plate is negligible, but actually it is not so. The error created due to this is called end error. To remove this, the resistance box and the unknown resistance must be interchanged and then the mean reading must be taken.