Mutually inductance between two magnetically coupled coils depends on
A. Permeability of the core
B. The number of their turns
C. Cross-sectional area of their common core
D. All of the above
Answer: Option D
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M = k*sqrt(L1*L2)
if we change permeability of core, inductance of coils will be changed.
if we change numbers of turns of coils, inductance of coils will be changed.
if we change cross-sectional area of core, inductance of coils will be changed.