In the context of electromagnetic induction, the fraction of magnetic flux produced by the current in one coil that links the other coil is called _______.

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SSC JE Electrical 10 Oct 2023 Shift 2 Official Paper-I
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  1. coefficient of coupling
  2. mutual induction
  3. mutually induced EMF
  4. self-induction

Answer (Detailed Solution Below)

Option 1 : coefficient of coupling
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Concept:

The coefficient of coupling is a factor used when two coils are mutually coupled in a magnetic circuit.

The coupling coefficient K is a measure of the magnetic coupling between two coils.

The coupling coefficient is the amount of inductive coupling that exists between the two coils is expressed as a fractional number between 0 and 1. The coupling factor between the coils or the coupling coefficient is given as

\(K = \frac{M}{{\sqrt {{L_1}{L_2}} }}\)

0 ≤ K ≤ 1

K < 0.5 loosely coupled

K > 0.5 tightly coupled

K = 1 magnetically tightly coupled.

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