(1) The wire shown in the figure carries a current of 10A. What is the magnitude of magnetic Meld
induction at the centre O? Given the radius of the bent coil is 3 cm.
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90°
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The wire shown in Fig, carries a current of 10 A. Determine the magnitude of magnetic field at the centre O. Given radius of the bent coil is 3 cm.
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Answer
Given that,
Current i=10A
Radius r=3cm
Angle θ=360
0
−90
0
=270
0
We know that,
The magnetic field
B=
4πr
μ
0
Iθ
B=
3×10
−2
×2
10
−7
×10×3π
B=
2
π
×10
−4
B=1.57×10
−4
T
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