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?

Academy of PakistanTest & Learning

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Academy of PakistanTest & Learning

804Active Users

1316Electrical EngineeringMedium

AIncreases

BRemains same

CFirst increases and then decreases depending on the depth of iron in¬sertion

DDecreases

Correct answer

A. Increases

Explanation

The correct answer is Increases.

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? - Answer and Explanation | Academy of Pakistan