MHT CET 2026 Physics question
Two circular coils X (smaller) and Y (bigger), each having a single turn, carry equal currents in the same direction and subtend the same angle at point 'O' along the axis of the coil. The distances of the centers of coil to point 'O' are d and for coil Y and X respectively. The radii of coils Y and X are (2r) and (r) respectively. The magnetic induction due to the bigger coil at point 'O' is and that due to smaller coil X at point 'O' is . (d >>r) The relation between and is
Answer: (C)
Solution
On the axis of a circular coil of radius at distance from its centre, . For this becomes . Coil Y: , , so . Coil X: , $x =
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