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If r be the distance of a point on the axis of a magnetic dipole from its centre then the magnetic field at such a point is proportional to
Options
(a) 1/r
(b) 1/r²
(c) 1/r³
(d) none of these
Correct Answer:
1/r³
Explanation:
As we know that, the magnetic field at a point due to the dipole is given by B = (μ₀ / 4π) × (M / r³) × √(1 + 3 cos² θ) where, M is magnetic dipole moment. Then, B ∝ 1 / r³
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Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The pair of quantities having same dimensions is
- A man goes 10 m towards north, then 20m towards east, the displacement is
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- A body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool
- A thin prism of angle 15⁰ made of glass of refractive index µ₁ = 1.5 is combined
Topics: Magnetic Effects of Current and Magnetism (167)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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