Magnetic Effects Of Current Question 52
Question: A current of 1 ampere is passed through a straight wire of length 2.0 metres. The magnetic field at a point in air at a distance of 3 metres from either end of wire and lying on the axis of wire will be [MP PET 1995]
Options:
A) $ \frac{{\mu_{0}}}{2\pi } $
B) $ \frac{{\mu_{0}}}{4\pi } $
C) $ \frac{{\mu_{0}}}{8\pi } $
D) Zero
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Answer:
Correct Answer: D
Solution:
The magnetic field at any point on the axis of a wire is zero.
BETA
