Problem: A long, straight wire carries a current of 4 A. What is the magnetic field at adistance of 5 cm from the wire?Solution: is 2.54 * 10^-5 T.Problem: A long straight wire carrying a current of 5 A is surrounded by a cylindricalsurface of radius 4 cm and height 10 cm, with the wire passing through the center of thecylinder. Determine the magnetic flux through the surface.Solution: 1.005*10^-2 Wb.Problem: A magnetic field is directed perpendicular to the surface of a circular loop ofwire with radius 10 cm. The field varies with time according to the equation B(t) = 0.2t +0.1 T. What is the magnitude of the induced emf in the loop when t = 2 s?Solution: 0.00628 V/s.

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Problem: A long, straight wire carries a current of 4 A. What is the magnetic field at a distance of 5 cm from the wire? Solution: is 2.54 * 10^-5 T.