Lenz's law demonstration device

Abstract

The invention discloses a Lenz's law demonstration device, which comprises a non-magnetic-conductive and non-electric-conductive second column body and a non-magnetic-conductive metal ring which are used for conducting a contrast experiment, wherein at least one magnet is arranged above or below the second column body; a spacing distance is arranged between every two adjacent magnets; the metal ring can be sleeved outside the magnet and the second column body in a sliding manner; and orientations of the south and north poles of each magnet are consistent and are the same as the length direction of the column body. The Lenz's law demonstration device disclosed by the invention has the advantages of simplicity in structure, convenience in use, good demonstration effect, more intuition, and easiness in batch production, detachability and visualization.

Description

[0001] technical field [0002] The invention relates to an electromagnetic induction phenomenon demonstration device, in particular to a Lenz law demonstration device. [0003] Background technique [0004] The traditional demonstration device of Lenz's law mainly consists of two metal rings fixed at both ends of a metal bar, one of which is closed and the other is open, and the concave groove at the center of gravity of the metal bar is supported by the thimble at the upper end of the bracket , can rotate around the thimble. The defect of this kind of demonstration device is that it must be demonstrated in a fixed position, which is not convenient for walking and demonstration, the demonstration effect is not obvious, and it is inconvenient to operate, and it is easy to touch the metal ring and cause it to rotate. Although numerous Lenz's law demonstrators have appeared successively, some of them have good demonstration effects, but their structures are complicated, thei...

AI Technical Summary

Problems solved by technology

The disadvantage of this kind of demonstration device is that it must be demonstrated in a fixed position, it is not convenient to walk around for demonstration, the demonstration effect is not obvious, and it is inconvenient to operate, and it is easy to touch the metal ring and cause it to rotate

Although many Lenz's law demonstrators have appeared one after another, some of them have good demonstration effects, but their structures are complicated, their cost is high, their use is inconvenient, and they are not easy to carry.

Although some are simple in structure and low in cost, the demonstration effect is not good, such as using copper tubes to demonstrate

The Chinese utility model patent with the authorized announcement number CN 202677681 U discloses a demonstration device of Lenz’s law. Two insulating tubes are vertically fixed on the base, and an insulating inner tube with a slightly smaller outer diameter is installed in one of the insulating tubes. A closed coil is fixed on the insulated inner tube, and a wallboard is installed vertically on the base behind the insulating tube, and a magnetic ring and a supporting plate are installed on the wallboard through a hinge. The device overcomes the disadvantages of the previous Lenz's law demonstration device that the demonstration effect is not obvious and bad, and has an intuitive demonstration effect, but the structure is complex, it is not easy to mass-produce, and it is not portable. When teachers need classroom demonstrations, it is troublesome to carry and assemble. Not suitable for teachers to walk around and demonstrate

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