| ⇦ | 
| ⇨ |
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:
- An electric kettle takes 4A current at 220 V. How much time will it take to boil 1 kg
- Heat is supplied at constant pressure to diatomic gas. The part of this heat that goes
- A coil of resistance 20 ohm and inductance 5H is connected with a 100V battery
- A planar coil having 12 turns carries 15 A current. The coil is oriented with respect
- Four point masses, each of value m, are placed at the corners of a square ABCD
Topics: Magnetic Effects of Current and Magnetism
(167)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply