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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
- The moment of inertia of a uniform circular disc of radius R and mass M about an axis
- The nuclear radius of a certain nucleus is 7.2 fm and it has a charge of 1.28×10⁻¹⁷ C.
- A spherical planet has a mass Mp and diameter Dp. A particle of mass
- Consider the following two statements about Kirchhoff’s law
- If two electric bulbs have 40 W and 60 W ratings at 220 V, then the ratio
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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