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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
- What is the wavelength of light for the least energetic photon emitted
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- Which one of the following is not due to total internal reflection?
- A radioactive substance emits n beta particles in the first 2 s and 0.5 n beta
- A point charge q is placed at a distance x/2 directly above the centre of a cube
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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