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Consider a loop of wire oscillating up and down at the end of a spring. The figure below shows the same loop at different moments in time. t = 0 t = 1 t = 2 t = 3 t = 4 t = 5 t = 6 Ollllll Delllll Ceeeell I oooooo Delllll Olllll B b) The dashed region of constant magnetic field will cause the loop to experience an induced emf at some moments in time but not at other moments if the direction of the magnetic field is (circle all correct choices): i) toward the top of the page ii) toward the bottom of the page iii) toward the right side of the page iv) into the page v) out of the page Explain your reasoning.
Three loops of wire shown in the figure are all subject to the same uniform magnetic field B that does not vary with time. Loop 1 oscillates back and forth as the bob in a pendulum, loop 2 rotates about a vertical axis, and loop 3 oscillates up and down at the end of a spring. The length of the arrows represents how far the loops move. B c) Which loop, or loops, will experience an induced emf? Briefly explain your reasoning.
d) Two identical metal discs are attached to identical strings and pulled back to the same position before being released. The first pendulum starts its swing outside the magnetic field and the second pendulum is inside the magnetic field for the entirety of its swing (the arrows indicate how far each pendulum swings). Which pendulum will oscillate back and forth for the longest time before coming to a stop? Explain your reasoning. B t=0]