Question

What is the coefficient of coupling (K ) between two coils?

Options

• The induced EMF per unit rate of change in primary current

• The fraction of the total magnetic flux produced by one coil that links with the other coil

• The total magnetic flux linkage in the secondary coil per unit primary current

• The self-inductance of coil 1 divided by that of coil 2

Answer 1

The coefficient of coupling measures the fraction of one coil’s total magnetic flux that links with the other. It quantifies how efficiently flux is shared between the coils.