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A long wire carrying a steady current is bent into a circular loop of one turn. The magnetic field at the centre of the loop is B. It is then bent into a circular coil of n turns. The magnetic field at the centre of this coils of n turns will be
Options
(a) nB
(b) n²B
(c) 2nB
(d) 2n²B
Correct Answer:
n²B
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
- When a piece of metal is illuminated by a monochromatic light of wavelength λ,
- An electron of mass m and a photon have same energy E. The ratio of de-Broglie
- The point of suspension λ of a simple pendulum with normal time period T₁ is moving
- The input resistance of a silicon transistor is 100 W. Base current is changed
- 24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected
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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