Counting device for demonstrating magnitude of magnetic force

Abstract

The invention relates to a counting device for demonstrating the magnitude of a magnetic force. Lower supporting rods are fixed to four side edges of a bottom plate; a vertical rod is fixed at the center of the bottom plate; the bottom end of the vertical rod is provided with a gasket; the gasket is covered with iron nuts; the lower part of the vertical rod passes through the iron nuts; a middle-layer plate is fixed to the tops of the lower supporting rods; a middle-layer plate hole is formed at the middle-layer plate; the vertical rod passes through the middle-layer plate hole; a magnet is arranged above the middle-layer plate hole; a spring is arranged above the magnet; and the vertical rod passes through the iron nuts, the magnet and the spring. With the counting device of the inventionadopted, the magnitude of the magnetic force of the magnet can be visually demonstrated. When testing is performed, one or two magnets are selected; the magnet is arranged on the middle-layer plate;the iron nuts below the middle-layer plate are pulled upwards one by one, and the number of iron nuts that can be attracted at most is needed experimental data; the number of magnets sucked together is increased, the magnitude of the magnetic force is measured, and a result is recorded. According to the counting device of the present invention, conclusions are drawn through experiments, and provedwith data. With the counting device adopted, the problem of lack of standardization can be solved, and the experiment can be very simple and effective.

Description

technical field [0001] The invention relates to a teaching and demonstration tool, in particular to a kind of vertical rod installed in the center of the bottom board, middle board, upper board and top board, and a plurality of iron nuts are worn on the vertical rod above the bottom board, and the middle board There are multiple magnets on the vertical rod above the board, and according to the magnetic force of the magnets, multiple iron nuts can be attracted to the piece counting device under the middle board to demonstrate the magnetic force. Background technique [0002] At present, there is no special experimental instrument for measuring the magnetic force of magnets in the laboratory. When the teacher talked about the magnetic force of magnets in class, he could only use a board with magnets on it, and paper clips on the bottom of the board to attract them in series. Then count the number of paper clips. To prove the magnitude of the magnetic force. This method is a l...

AI Technical Summary

Problems solved by technology

Therefore, it is unscientific and not standardized to use this primitive method to demonstrate the magnitude of the magnetic force of a magnet.

Images