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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
- The threshold frequency for a metallic surface corresponds to an energy of 6.2 eV,
- When the energy of the incident radiation is increased by 20%,
- The oscillating frequency of a cyclotron is 10 MHz. If the radius of its Dees is o.5 m,
- Steam at 100⁰C is passed into 20 g of water at 10°C. When water acquires a temperature
- Two bodies of masses m and 4 m are moving with equal K.E. The ratio of their linear
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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