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Question
Calculate the value of the magnetic field at a distance of 2 cm from a very long straight wire carrying a current of 5 A (Given: μ0 = 4π × 10-7 Wb/Am).
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Solution
Given: I = 5A, x = 0.02 m,
The magnetic induction,
`B = (mu_0I)/(2pix)`
`B = mu_0/(4pi)(2I)/x`
B = `10^-7 xx (2(5))/(2 xx 10^-2)`
B = 5 × 10−5T
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