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Question
Physics
The magnetic field at centre P is
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Q. The magnetic field at centre $P$ is
Rajasthan PET
Rajasthan PET 2002
A
$ \frac{{{\mu }_{0}}I}{4r} $
B
$ \frac{{{\mu }_{0}}I}{2r} $
C
$ \frac{{{\mu }_{0}}I}{8r} $
D
zero
Solution:
The magnetic field at centre of half circular coil $ B=\frac{{{\mu }_{0}}I}{4r} $
