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Question

B at centroid of regular hexagon carrying current i as shown is:

A
123 Gauss
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B
63 Gauss
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C
3 Gauss
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D
13 Gauss
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Solution

The correct option is A 123 Gauss
Bnet=6×Bone side

Bone side=μoi4πr(sinα+sinβ)

Here, α=β=30o

Bnet=6×107×10a3=123×156102=123×107=123Gauss

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