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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
- Two identical capacitors are first connected in series and then in parallel.
- Eight drops of a liquid of density ρ and each of radius a are falling through air
- The current in the windings of a toroid is 2.0 A. There are 400 turns
- The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap
- A disc of moment of inertia (9.8/π²) kg m² is rotating at 600 rpm. If the frequency
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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