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A Hall effect current sensor has the advantage over a shunt that it

  • A.is unaffected by the temperature of the conductor being measured
  • B.provides isolation and works on direct current
  • C.produces a much larger output voltage for a given current
  • D.requires no external supply of any kind for its operation

Answer: B

Nothing is inserted in the circuit and there is no galvanic connection, yet unlike a current transformer it responds to a steady current. Both a supply and temperature compensation are needed, which is the price of those advantages.

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