A coil is said to be loosely coupled with which of the following condi...
Answer: d
Explanation: k is the coefficient of coupling. It lies between 0 and 1. For loosely coupled coil, the coefficient of coupling will be very less. Thus the condition K<0.5 is true.
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A coil is said to be loosely coupled with which of the following condi...
Understanding Coupling in Coils
In electrical engineering, coupling refers to the interaction between two inductive components, typically coils or transformers. The degree of coupling is quantified by a parameter known as the coupling coefficient, denoted as K.
What is the Coupling Coefficient (K)?
- K ranges from 0 to 1.
- K = 0 indicates no coupling (independent coils).
- K = 1 indicates perfect coupling (all magnetic lines link both coils).
Loose Coupling Explained
Loose coupling occurs when the magnetic field produced by one coil does not significantly influence the other coil. This is characterized by a coupling coefficient K that is less than 0.5.
Conditions for Loose Coupling
- K < />: This indicates that a significant portion of the magnetic field does not link the two coils.
- Limited Interaction: The energy transfer between the coils is minimal, leading to inefficient mutual inductance.
- Applications: Loose coupling is often used in applications where isolation or minimal interaction is desired, such as in certain types of sensors or transformers.
Why K < 0.5="" />
- Efficiency: Lower coupling can reduce efficiency in energy transfer but may be beneficial in preventing interference.
- Design Considerations: Engineers must consider the desired coupling based on the application, ensuring that the coils are designed appropriately for their intended function.
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