Q177 / 200 · MHT CET - Medical 2026 (21 April Shift 1) · Physics
Identify the CORRECT statement
- AThe direction of eddy currents can be determined by the Left-Hand Rule.
- BEddy currents always perform useful work and increase the efficiency of all electrical devices.
- Correct answerCEddy currents circulate in planes perpendicular to the magnetic field that induces them.
- DEddy currents are present only in non-magnetic materials like aluminum
Solution
Eddy currents are induced in bulk pieces of conductors when they are subjected to a changing magnetic flux.
According to Faraday's law of induction, the induced electric field and the resulting eddy currents circulate in closed loops within the conductor, in planes perpendicular to the changing magnetic field.
The direction of eddy currents is determined by Lenz's law or Fleming's Right-Hand Rule, not the Left-Hand Rule.
Eddy currents often cause undesirable heating and energy loss in electrical devices like transformers, reducing their efficiency.
Eddy currents can be induced in any conducting material, whether magnetic (like iron) or non-magnetic (like aluminum).
Answer: Eddy currents circulate in planes perpendicular to the magnetic field that induces them.
According to Faraday's law of induction, the induced electric field and the resulting eddy currents circulate in closed loops within the conductor, in planes perpendicular to the changing magnetic field.
The direction of eddy currents is determined by Lenz's law or Fleming's Right-Hand Rule, not the Left-Hand Rule.
Eddy currents often cause undesirable heating and energy loss in electrical devices like transformers, reducing their efficiency.
Eddy currents can be induced in any conducting material, whether magnetic (like iron) or non-magnetic (like aluminum).
Answer: Eddy currents circulate in planes perpendicular to the magnetic field that induces them.
Hence, the correct answer is option: 'C'.