I. Overview

This demonstrator is used for the teaching of physical magnetic field in middle schools. There are five kinds of vertical, horizontal and three-dimensional, and bar magnets can be used, the hoof magnet demonstrates the formation of magnetic induction lines around and the formation of magnetic induction lines under different conditions of attraction or exclusion. It can also demonstrate the formation of magnetic induction lines in each space around the current magnetic field. This demonstrator is made of organic glass, novel and beautiful, with obvious effect, which is intuitive and projective.

II. Use

Shake the demo board gently to make the small needle piece or the small needle in the hole irregularly arranged, then put the magnet on the demo board and tap the board surface lightly, the small needle piece or the small needle in the hole obviously presents magnetic induction lines under the action of magnetic field.

III. Precautions

1. Do not contact with acid and alkali corrosion products during use or storage, and keep them dry to avoid oxidation of metal parts and affecting the experimental effect.

2. This instrument is made of plexiglass. Do not touch it hard to avoid damage.