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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
- A thermoelectric refrigerator works on
- When a ceiling fan is switched off its angular velocity reduces to 50% while
- In the series resonance the value of impedence is 3 Ω and the resistance is 4Ω,
- A 70 kg man stands in contact against the inner wall of a hollow cylindrical drum
- A boat of anchor is rocked by waves whose crests are 100 m apart and velocity
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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