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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
- Light emitted during the de excitation of electron from n=3 to n=2, when incident
- Photons of 5.5 eV energy fall on the surface of the metal emitting photoelectrons
- A wire of resistance 4 ohm is stretched to twice its original length.
- To demonstrate the phenomenon of interference, we require two sources which emit
- The induced emf in a coil of 10 H inductance in which current varies
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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