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Electromagnet: In this device, I have used rotary motion of the electromagnet to increase its power. Electromagnets are placed on both sides of the arm B, which is positioned inside the ring that also has electromagnets installed on it. The ring is movable, and depending on the direction of rotation of the ring, we can move backwards or forwards in time. The arm remains stationary. The arrangement of the electromagnets is crucial, and the number of electromagnets on the ring can also be increased.