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 ?

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Accepted Answer

B. Increases

Answer

A. Decreases

Answer

C. Remains same

Answer

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

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 ?

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