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Anshu Gala
Asked: 2022-11-08T14:46:44+05:30 In:

Figure. Shows a small loop carrying a current I. The curved portion is an arc of a circle of radius R and the straight portion is a chord to the same circle subtending an angle `theta`. The magnetic induction at centor O is
image
A. zero
B. always inward irrespective of the value `theta`
C. inward as long as `theta` is less than `pi`
D. always outward irrespective of the value of `theta`

Figure. Shows a small loop carrying a current I. The curved portion is an arc of a circle of radius R and the straight portion is a chord to the same circle subtending an angle `theta`. The magnetic induction at centor O is
image
A. zero
B. always inward irrespective of the value `theta`
C. inward as long as `theta` is less than `pi`
D. always outward irrespective of the value of `theta`
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1 Answer

  1. Correct Answer – C
    (c) Due to current shown in figure, the magnetic field with loop
    is outwards. So field at O should be inward because magnetic
    field lines from closed loop. But if `theta gt pi`, then point O will lie within loop and for a point within loop magnetic field is
    outward.

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