Question

A wire is in the form of a circle of radius 5cm.the length of the wire will be​

Answer 1

Step-by-step explanation:

Answer

Correct option is

C

8π×10

−5

T

We Know,

r=5cm=5×10

−2

m

n=1

I=0.5A

μ

0

=4π×10

−7

Hm

−1

x=10cm=10×10

−2

m

B=

2(r

2

+x

2

)

3/2

μ

0

nir

2

B=

2×[(5×10

−2

)

2

+(10×10

−2

)

2

]

3/2

4π×10

−7

×0.5×(5×10

−2

)

2

=8π×10

−5

Hence the correct answer is 8π×10

−5

T

Answer 2

Answer:

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