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Multi-functional electrical experiment instrument

An electrical experiment, multi-functional technology, applied in the direction of instruments, teaching models, educational appliances, etc., to achieve the effect of accurate and reliable, obvious flame, simple installation

Inactive Publication Date: 2012-09-26
雷海平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the mass of the liquid is large and the temperature rises slowly; the temperature change is small and the convincing power is weak; the heating time is long, the heat loss is large and uneven, and it is easy to cause the experiment to fail

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0016] like figure 1 As shown, two linear resistance wires 3 are respectively suspended and fixed on the support 1 side by side through the binding post 2. The lengths of the two resistance wires are the same, but the resistance values ​​are different, that is, the thickness or resistivity of the two resistance wires should be different. same. The two clips 4 clamp the two matches 5 on the support 1 respectively, so that the head ends of the two matches 5 provided with chemical substances are respectively tightly pressed on the two resistance wires 3 . The two resistance wires 3 are also respectively placed with foam 6 at the positions close to the matches 5 .

[0017] In order to facilitate the demonstration of the above-mentioned device upright to increase visibility, a sleeve 8 with an open lower end is fixed on the back of the bracket 1. The inner diameter of the sleeve 8 should be greater than the outer diameter of the metal rod 10 on the iron frame platform, so that th...

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Abstract

The invention relates to a multi-functional electrical experiment instrument, comprising two resistance wires with different resistance values. The multi-function electrical experiment instrument is characterized in that: the instrument also includes two clamps clamping matches; the two resistance wires, which are in linear shapes, are fixed on a support respectively by binding posts in a side-by-side suspending mode; the two clamps are respectively used for clamping two matches at the support, so that the two matches' heads provided with chemical substances are respectively pressed on the two resistance wires. According to the invention, beneficial effects are as follows: it takes a little time to carry out the experiment and matches and foams can be lighted in tens of seconds; a small-scale fire disaster can be realized splendidly with controllable security; a resistance ratio between two resistance wires is adjusted and timing for lighting is reliable, so that the success rate of the experiment is high; if the resistance values of the resistance wires and a voltage value of an external power supply are selected appropriately, one resistance wire can light a match continuously and another resistance wire can not light a match; an iron stand is suspended, thereby realizing good visuality; four kinds of experiments including an electrical power experiment, an electrical power rate experiment, a current heat effect experiment and a Joule's law experiment can be completed; and the instrument with simple structure has a remarkable effect and is easy to popularize.

Description

Technical field [0001] The present invention involves a multi -functional electrical experimental device that can do electrical experiments in middle school, especially for electrical experiments, electrical experiments, current thermal effects experiments, and Jiao Er Law experiments. Background technique [0002] Most of the existing middle school electronic experiments, electrical power experiments, current thermal effects experiments, and coke ear law experiments, most of them use resistance wire or fixed value resistance to the water / or kerosene in the bottle / or cup of the cup, and then compare the temperature of the water / or kerosene.How much / or fast and slow to perform experiments.The disadvantage is that the quality of the liquid is large, the temperature is slow; the temperature changes small, the persuasion is weak; the heating time is long, the heat loss is large and uneven, which can easily lead to the failure of the experiment. Invention content [0003] The purpo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09B23/18
Inventor 雷海平
Owner 雷海平
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