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For a toroid to extract the energy from the supply system, the flux linkages of the magnetic field must be ________
  • a)
    zero
  • b)
    changing or varying
  • c)
    constant
  • d)
    any of the mentioned
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
For a toroid to extract the energy from the supply system, the flux li...

Flux Linkages in a Toroid

To extract energy from the supply system, the flux linkages of the magnetic field in a toroid must be changing or varying. This is because the generation of an electromotive force (EMF) in a coil is directly proportional to the rate of change of magnetic flux passing through the coil.

Explanation:

- In a toroid, the magnetic field is confined within the core due to its closed-loop structure, which helps in increasing the flux linkage with the coils wound around it.
- When the magnetic flux passing through the toroid changes, it induces an EMF in the coils due to Faraday's law of electromagnetic induction.
- This EMF can then be used to extract energy from the supply system for various applications.
- If the magnetic flux linkages are constant, there will be no change in flux, and hence no induced EMF will be generated in the coils.
- Therefore, for energy extraction to occur, the flux linkages must be changing or varying, allowing for the generation of EMF in the coils.

Conclusion:

In conclusion, in order for a toroid to extract energy from the supply system, the flux linkages of the magnetic field must be changing or varying to induce an electromotive force in the coils. This change in flux is essential for the conversion of magnetic energy into electrical energy.
Free Test
Community Answer
For a toroid to extract the energy from the supply system, the flux li...
dWelec = idφ = eidt, where dWelec = differential electrical energy to coupling field, and if the flux linkages are either constant or zero, i.e, dφ = 0, then dWelec = 0.
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