Question

A very long wire generates a magnetic field of 0.0050 × 10-4 t at a distance of 3.0 mm. what is the magnitude of the current?

Answer 1

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Answer 2

The magnitude of the current is 0.075 A.

A long wire generates a magnetic field B = 0.0050 × 10 ⁻⁴ T

Distance 3.0 mm

How magnitude of the current is calculated?

      The magnitude can be usually said about the quantity. In the terms of " scalar " and " vector " the word magnitude can be determined. If the quantity is scalar, then it has only magnitude but if the quantity is vector, then it has both magnitude and direction. The magnitude of the current depends upon the quantity of charge that passes a chosen some point during some interval.

                        B = μ₀I / 2πd

                         I =  B × 2πd / μ₀

                           =  (0.0050 × 10⁻⁴ × 2 π × 3 mm) / ( 4π × 10 ⁻⁷ )

                        I  = 0.075 A

The magnitude can be usually said as maximum extent of size. In that the current flow has been calculated.

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