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Use the following diagram to answer the next question. The diagram below shows a experimental design used to investigate the effect of a magnetic field on a vertical current-carrying conductor. The aluminum rod is able to swing freely. Retort stand Horseshoe magnet Aluminum rod Battery Switch When the switch is closed, a current in the circuit causes the bottom end of the aluminum rod to swing Select one: O a. toward the retort stand O b. away from the retort stand O c. toward the south pole of the magnet O d. toward the north pole of the magnet