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The coupling between two magnetically coupled coils is said to be ideal if the coefficient of coupling is-
  • a)
    Zero
  • b)
    0.1
  • c)
    2
  • d)
    1
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
The coupling between two magnetically coupled coils is said to be ide...
An ideal transformer is a useful approximation of a very tightly coupled transformer (k≈1) in which both the primary and secondary inductive reactances are extremely large compared to the load impedance.
Hence, the correct option is (D)
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The coupling between two magnetically coupled coils is said to be ide...
The Coefficient of Coupling in Magnetic Coupled Coils

In a magnetic coupled coil system, the coefficient of coupling (k) quantifies the extent of magnetic coupling between the two coils. It provides information about how effectively the magnetic field generated by one coil induces a voltage in the other coil. The coefficient of coupling can range from 0 to 1, with 1 being an ideal or perfect coupling.

Explanation

When the coefficient of coupling is 1, it indicates that all the magnetic flux produced by one coil is linking with the other coil. In other words, the magnetic field lines are completely shared between the two coils, resulting in maximum mutual inductance. This ideal situation ensures that any change in current or voltage in one coil will induce the maximum voltage in the other coil.

On the other hand, when the coefficient of coupling is 0, it means that there is no magnetic coupling between the two coils. In this case, the magnetic field lines do not intersect or link, resulting in no mutual inductance. As a result, there is no voltage induced in the secondary coil when a current flows through the primary coil.

When the coefficient of coupling is between 0 and 1, it indicates a partial magnetic coupling between the coils. This means that only a portion of the magnetic field lines generated by one coil link with the other coil. The value of the coefficient of coupling can be less than 1 due to factors such as the physical separation between the coils, the orientation of the coils, and the presence of magnetic shielding.

Significance of an Ideal Coupling

An ideal coupling, represented by a coefficient of coupling of 1, is highly desirable in many applications. It ensures maximum power transfer between the coils and allows for efficient energy transfer. Furthermore, an ideal coupling minimizes losses in the system and provides better voltage regulation.

In practical applications, achieving an ideal coupling is challenging due to various factors such as physical constraints, coil design, and external interference. However, designers strive to maximize the coefficient of coupling to ensure optimal performance of magnetic coupled coil systems.

Conclusion

In summary, an ideal coupling between two magnetically coupled coils is represented by a coefficient of coupling of 1. This indicates maximum magnetic coupling and ensures efficient energy transfer between the coils. Achieving an ideal coupling is a desirable goal in many applications, although it can be challenging to achieve in practice.
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The coupling between two magnetically coupled coils is said to be ideal if the coefficient of coupling is-a)Zerob)0.1c)2d)1Correct answer is option 'D'. Can you explain this answer?
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