A very long straight wire carrying current I, is 3 cm above a rectangular wire with length L= 20 cm and width  w = 10 cm (see Figure). a) Calculate the magnetic flux through the rectangular wire due to the current I. b) If the current changes with time according to I = (5+10t) A, determine the value of the induced emf in the rectangular wire. c) Determine the direction of the induced current in the rectangular wire. Explain!

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