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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 coi] without dimensional change of coil? | |
A. | Decreases [Wrong Answer] |
B. | Increases [Correct Answer] |
C. | Remains same [Wrong Answer] |
D. | First increases and then decreases depending on the depth of iron insertion [Wrong Answer] |