In which of the following devices, the eddy current effect is not used ?

1. induction furnace

2. magnetic braking in train

3. electromagnet

4. electric heater

Doubtly Asked 30 Oct 2026 NEET UG 2019 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 3. electromagnet or 4. electric heater

Eddy currents are induced in a conductor by a changing magnetic flux.

Induction furnace: eddy currents heat and melt the metal. Used.
Magnetic braking in trains: eddy currents oppose the motion. Used.
Electromagnet: it works by the magnetic field of a steady current. The core is laminated precisely to reduce eddy currents. Not used.
Electric heater: heating comes from Joule heating in the resistance wire. Not used.

So both options 3 and 4 fit the question as worded.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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