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An electric current passes through a long straight wire. At a distance 5 cm from the wire, the magnetic field is B. The field at 20 cm from the wire would be
Options
(a) B / 6
(b) B / 4
(c) B / 3
(d) B / 2
Correct Answer:
B / 4
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 cockroach is moving with a velocity v in anticlockwise direction on the rim
- The resistance in the two arms of the meter bridge are 5Ω and RΩ, respectively
- When two displacements represented by y₁=a sin(?t) are superimposed the motion is
- If Q, E and W denote respectively the heat added, change in internal energy
- The velocity v of waves produced in water depends on their wavelength λ, the density
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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