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A long straight wire of radius a carries a steady current I. The current is uniformly distributed over its cross-section. The ratio of the magnetic field B and B’ at radial distances a/2 and 2a respectively, from the axis of the wire is
Options
(a) (1/2)
(b) 1
(c) 4
(d) (1/4)
Correct Answer:
1
Explanation:
No explanation available. Be the first to write the explanation for this question by commenting below.
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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
- An electric kettle takes 4A current at 220 V. How much time will it take to boil 1 kg
- A block of mass m is moving on a wedge with the acceleration aᵒ
- Two sound waves of wavelengths 5m and 6m formed 30 beats in 3 seconds
- The mass of a ⁷₃ Li nucleus is 0.042 u less than the sum of the masses of all its nucleons
- Two coherent sources of different intensities send waves which interfere.
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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