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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
- When a wire of uniform cross-section a, length l and resistance R
- Photons with energy 5eV are incident on a cathode C in a photoelectric cell.
- In Young’s double slit experiment, the intensity of light coming from the first slit
- The electric potential V at any point (x,y,z) all in meters in space is given by
- Two identical capacitors each of capacitance 5 mF are charged potentials 2 kV and 1 kV
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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