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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 a common emitter (CE) amplifier having a voltage gain G, the transistor
- Which one of the following is a vector?
- A small rod of bismuth is suspended freely between the poles of a strong electromagnet.
- Two resistors of 6Ω and 9Ω are connected in series to a 120 V source.
- The length of an elastic string is a metre when the longitudinal tension is 4N and b
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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