How can small current in a circuit be detected?

Answer:

Galvanometer is used to detect presence of small current in a circuit.

Use of galvanometer

  • A galvanometer is an electromechanical system that detects and displays an electric current.
  • A galvanometer generates a rotary deflection of a pointer in response to electrical current flowing through a coil in a continuous magnetic field, acting as an actuator.
  • A galvanometer is a device that detects weak electrical voltages and currents in a circuit.
  • It has a coil of a solid laminated horse shoe magnet pivoted between concave pole faces. If an electrical current passes through the coil, it deflects.

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