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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 compass needle which is allowed to move in a horizontal plane
- Water flows through a pipe. The area of cross-section at one place A₁=10 cm²,
- The time period of a simple pendulum in a lift descending with constant acceleration g is
- A beam of light contains two wavelengths 6500Å and 5200Å.
- A remote-sensing satellite of earth revolves in a circular orbit at a height
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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