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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
- In an orbital motion, the angular momentum vector is
- 64 drops of mercury, each charged to a potential of 10 V, are combined
- When a spring is extended by 2 cm energy stored is 100 J. When extended further by 2 cm
- A black body is heated from 27° C to 127° C. The ratio of their energies of radiations
- The frequency of a light wave in a material is 2 x 10¹⁴ Hz and wavelength is 5000Å.
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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