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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
Related Questions: - A thin prism of angle 15⁰ made of glass of refractive index µ₁ = 1.5 is combined
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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
- A thin prism of angle 15⁰ made of glass of refractive index µ₁ = 1.5 is combined
- A circular road of radius 1000m has banking angle 45°.The maximum safe speed of a car
- If the rise in height of capillary of two tubes is 6.6 cm and 2.2 cm
- A carnot engine working between 300 K and 600 K has a work output of 800J per cycle.
- A wire of length 1 m is placed in a uniform magnetic field of 1.5 tesla at an angle
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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