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What is the magnetic induction at a dist...

What is the magnetic induction at a distance of 5 cm from a straight wire carrying a current of 5 mA ?

A

`4xx10^(-8)Wb//m^(2)`

B

`3xx10^(-8)Wb//m^(2)`

C

`2xx10^(-8)Wb//m^(2)`

D

`5.5 xx10^(-8)Wb//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Given: `x=5 xx10^(-2) m, I =5 mA =5 xx 10^(-3)A`
`B=(mu_(0))/(4pi) ((2I)/(x))=10^(-7) xx(2xx5xx10^(-3))/(5xx10^(-2))`
`thereforeB=2xx 10^(-8)Wb//m^(2)`
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