Calculate the value of 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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Data : I = 5A, a = 0.02 m, \(\frac{\mu_{0}}{4 \pi}\) = 10-7 T∙m/A The magnetic induction, B = \(\frac{\mu_{0} I}{2 \pi a}=\frac{\mu_{0}}{4 \pi} \frac{2 I}{a}\) = 10-7 × \(\frac{2(5)}{2 \times 10^{-2}}\) = 5 × 10-5 T
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