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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

Two toroids 1 and 2 have total number of turns 200 and 100 respectively with average radii 40 cm and 20 cm, respectively. If they carry same current , the ratio of the magnetic fields along the two loops is

Answer: (A)

Solution

, so

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Question ID VK-078807