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In repulsion type instrument the force of repulsion is approximately proportional to

  • In repulsion type instrument the force of repulsion is approximately proportional to Square of current.
  • In a repulsion type instrument, the current passing through the coil produces two magnetic fields, one in the coil and the other in the fixed core.
  • The interaction between these magnetic fields produces a force of repulsion between the two coils, which is approximately proportional to the square of the current.
  • This force causes the moving coil to rotate and hence the instrument measures the current flowing through the circuit.