The current I in a long, straight wire is constant and is directed toward the right. Conducting loops A, B, C, and D are moving, in the directions shown, near the wire. a)  Is the direction of the induced current clockwise or counterclockwise, or is the induced current zero for loop D? Briefly explain. b) What is the direction of the net force that the wire exerts on the loop D? (No explanation is needed.) c) Is the direction of the induced current clockwise or counterclockwise, or is the induced current zero for loop C? Briefly explain.

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