CBSE Class 12 Physics 2020 Outside Delhi Set 1 Paper

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Question : 3 of 37
 
Marks: +1, -0
A current I flows through a long straight conductor which is bent into a circular loop of radius R in the middle as shown in the figure.
The magnitude of the net magnetic field at point O will be :
Solution:
(d) µ0I2R(1−1π)
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