________ are loops of electric current induced within conductors by changing magnetic field.

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 3
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  1. Electric currents
  2. Eddy currents
  3. Berry currents
  4. Faulty currents

Answer (Detailed Solution Below)

Option 2 : Eddy currents
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  • Eddy currents (also called Foucault currents) are loops of electrical current induced within conductors by a changing magnetic field in the conductor according to Faraday's law of induction.
  • Eddy currents flow in closed loops within conductors, in planes perpendicular to the magnetic field.
  • The eddy currents cause energy to be lost from the transformer as they heat up the core i.e. electrical energy is being wasted as unwanted heat energy.
  • So that core is laminated to reduce eddy current to a minimum as they interfere with the efficient transfer of energy from the primary coil to the secondary one.

 

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