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KCET 2020 Physics Solved Paper

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Question : 56

Total: 60

The magnetic field at the origin due to a current element i

placed at a point with vectorposition

is

µ0i
4π
→
r
×
→
dl
r2
µ0i
4π
→
dl
×
→
r
r3
µ0i
4π
→
r
×
→
dl
r3
µ0i
4π
→
dl
×
→
r
r2

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