A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil ?

Electrical Engineering Mcqs

A certain amount of current flows through a ring-shaped coil with fixed number of turns. How does the magnetic induction B varies inside the coil if an iron core is threaded into coil without dimensional change of coil ?

(A)  Decreases

(B)  Increases

(C)  Remains same

(D)  First increases and then decreases depending on the depth of iron in¬sertion

Submitted By :Ali Uppal

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