NEET2014Physics-Magnetism
NEET 2014 Physics Magnetic Field Due to Current MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Two identical long conducting wires AOB and COD are placed at right angles to each other, with one above other such that O is the common point for the two. The wires carry I₁ and I₂ currents, respectively. Point P is lying at distance d from O along a direction perpendicular to the plane containing the wires. The magnetic field at the point P will be
A
μ₀/2πd (I₁)
B
μ₀/2πd (I₁ + I₂)
C
μ₀/2πd (I₁² − I₂²)
D
μ₀/2πd (I₁² + I₂²)¹/²
Correct Answer
Option B
Detailed Explanation
The magnetic field due to each wire at point P is perpendicular. Using the superposition principle, the net magnetic field is the vector sum of the fields due to each wire, which is μ₀/2πd (I₁ + I₂).
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