Consider two thin identical conducting wires covered with very thin insulating material…
Physics · JEE Main · NTA Exams — Magnetic Effects of Current and Magnetism
Consider two thin identical conducting wires covered with very thin insulating material. One of the wires is bent into a loop and produces magnetic field B1, at its centre when a current I passes through it. The second wire is bent into a coil with three identical loops adjacent to each other and produces magnetic field B2 at the centre of the loops when current I/3 passes through it. The ratio B1 : B2 is:
- 1 : 3
- 9 : 1
- 1 : 9
- 1 : 1
Answer
(A) 1 : 3
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