Small lamp assembly experiments focus: understanding the electronic component symbols, draw a series circuit diagram lamp is essential in our lives small appliances. It is mainly focused on the lights in a small area, for us to study and work. But you know what it is made of several components consisting of? Is it how bright it brought us? Let yourself be a small lamp. Purpose: an understanding of a simple circuit constitution 2. Draw a simple diagram of the experiment can Cognition: Lamps: can be placed flat bench seat has a lamp. The role of electronic components and symbols representing ① ------- provide battery power circuits; ② ------- bulb converts electrical energy into light energy; ③ ------- connections and wires conduction current (the water pipes in the water flow is called, in the flow of electricity in a wire is called the current electric power transmission along an object moving in a certain direction of flow pattern is invisible, intangible. current rate per 300,000 . km wire notation is: ④ switch - close and open the control circuit; ⑤ battery box ---- stationary batteries, above the "+, -" sign, indicating "positive and negative" understanding of the experimental equipment. : shade, diodes, double sided tape, straws, plastic tube, wire, foam base with switch battery box 1. insert separate diodes inside curved shade better (in order to avoid a short circuit, the factory-assembled), the two wires. bipolar diodes are connected (note length is positive then the red line), and then inserted into a bendable plastic spool; 2. Then put a plastic tube with a straw on the plug, the foam base and plastic pipe on the plug, consisting of a small lamp bracket. 3. Install the battery in the battery case, the above device with double-sided adhesive paste can be fixed with the battery box 4. trimming the length of the wires on the battery compartment, and then lead a small lamp on the bracket and the positive wire to the positive battery case a cathode connected to the negative (red and red), the circuit connection is completed. 5. The switch is on, look at the small table lamp is not lit? The experiment draw the following circuit diagram and tried to guide the students themselves drawn and marked Small bulbs to prompt the positive and negative: positive and negative battery box wire not direct contact, so as not to burn the child's hand can not do directly home, school experiment in the electric socket to avoid electric shock caused by accident, causing injury (. Remember) Knowledge Development: The first time lighting tools are widely used in candles, kerosene or gas lamp This lamp by burning kerosene or gas, therefore, there is strong and pungent smell of smoke, and to regularly add fuel. scrub shade, which is very convenient. More seriously, this lamp can easily cause a fire, a catastrophe. Over the years, many scientists find ways, to invent a safe and convenient light until 1879 October 21, the US inventor Thomas Edison through a long trial and error, and finally lit the world's first practical value of the lamp light. Light is the human conquest of the night a great witness. Since then, the inventor's name, as He invented the electric light, like, into the household, he is to be praised posterity as "King of the invention," the Edison safe voltage: refers to people not directly kill or maim voltage under normal environmental conditions permit continued. contact "safety extra low voltage" is under 36V lesson time, students can get to know more books and web series circuit and a parallel circuit under think they apply in our lives you know:..? circuit diagram Definition: wire the power switch (key), appliances, ammeter, voltmeter, etc. connected together to form a circuit, then in accordance with uniform symbols that represent them, such draw is called the circuit. Experiment: Students can network through books and more to understand the series circuit and a parallel circuit under. Safety Tips: The experiment must be under the guidance of a teacher or adult operation of any equipment can not be imported. http://www.bjxwt.com Beijing precedent http://www.bjxwt.com.cn Beijing Education Development Co., Ltd. stationery small child playing precedent http://www.xianhe-edu.com Beijing Education Development Co. Company Stationery Factory