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A very long, straight solenoid with a cross-sectional area of 1.86 is wound with 90.2 turns of wire per centimeter. Starting at = 0, the current in the solenoid is increasing according to 0.160 . A secondary winding of 5 turns encircles the solenoid at its center, such that the secondary winding has the same cross-sectional area as the solenoid. What is the magnitude of the emf induced in the secondary winding at the instant that the current in the solenoid is 3.2?

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