AIIMS2007Physics-Magnetism
AIIMS 2007 Physics Magnetic Field of a Coil MCQ Question
Type: MCQ-conceptual-Medium-Class 12
What is the magnetic field at a distance R from a coil of radius r carrying current I?
A
μ₀IR² / 2(R² + r²)³/²
B
μ₀Ir² / 2(R² + r²)³/²
C
μ₀I / 2r
D
μ₀I / 2R
Correct Answer
Option B
Detailed Explanation
A coil of radius r carrying current I, magnetic field at a point at a distance R from the centre of the coil is given by B = μ₀Ir² / 2(R² + r²)³/²
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