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AIIMS2019Physics-Magnetism

AIIMS 2019 Physics Magnetic Field MCQ Question

Type: MCQ-conceptual-Medium-Class 12

Two circular loops having same radius [R=10 cm][R = 10 \text{ cm}] and same current 72 A\frac{7}{2} \text{ A} are placed along same axis as shown. If distance between their centre is 10 cm10 \text{ cm}, find net magnetic field at point P.

Question diagram
A

50μ05 T\frac{50\mu_0}{\sqrt{5}} \text{ T}

B

28μ05 T\frac{28\mu_0}{\sqrt{5}} \text{ T}

C

56μ05 T\frac{56\mu_0}{\sqrt{5}} \text{ T}

D

56μ03 T\frac{56\mu_0}{\sqrt{3}} \text{ T}

Correct Answer

Option C

Detailed Explanation

At point P, the magnetic fields produced by both coils, B₁ and B₂, are in the same direction, allowing them to add constructively. Since both coils generate the same magnetic field strength (B₁ = B₂), the total magnetic field at point P is B = B₁ + B₂ = 2B₁. Other options are not applicable as they do not provide relevant information or alternative scenarios regarding the magnetic fields generated by the coils. Understanding the principle of superposition in magnetic fields is crucial for analyzing such configurations.

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