AIPMT PRELIMS2012Physics-Magnetism and Matter
AIPMT PRELIMS 2012 Physics Magnetic Field due to Current MCQ Question
Type: MCQ-numerical-Medium-Class 12
Two similar coils of radius R are lying concentrically with their planes at right angles to each other. The currents flowing in them are I and 2I, respectively. The resultant magnetic field induction at the centre will be
A
μ₀I/R
B
√5μ₀I/2R
C
3μ₀I/2R
D
μ₀I/2R
Correct Answer
Option B
Detailed Explanation
The magnetic fields due to each coil are perpendicular. Using vector addition, the resultant field is B = √(B₁² + B₂²) = √5μ₀I/2R.
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