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Question
Calculate the value of magnetic field at a distance of 3 cm from a very long, straight wire carrying a current of 6 A.
Solution
Given,
R = 3 cm = 3 × 10-2 m
I = 6 A
B = ?
Magnetic field B = `(mu_0 "l")/(2 pi "R")`
`= (4 pi xx 10^-7 xx 6)/(2 pi xx 3 xx 10^-2)`
B = 4 × 10-5 T
The value of a magnetic field is 4 × 10-5 T.
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