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在进行电子小制作时,很多同学用到过晶体二极管。可是问起二极管的作用,却有不少同学回答不出来或回答的不全面。因此在这里我跟同学们谈谈二极管的常规作用。我们先来按图1所示的电路图做一个实验。我们知道二极管是有极性的,有“+”号的一端是正极,“-”号的一端为负极。当二极管的正极经过开关 S 与电源正极相接,负极经过小电珠 H 与电源负极相接时,合上开关 S,我们发
In the electronic production of small, many students used a crystal diode. However, the role of the diode asked, but there are many students can not answer or answer is not comprehensive. So here I talk to my classmates about the normal role of the diode. Let's first do an experiment on the circuit shown in Figure 1. We know that the diode is polar, with “+” sign on the positive side and “-” sign on the negative side. When the positive pole of the diode is connected to the positive pole of the power supply via the switch S and the negative pole is connected to the negative pole of the power supply through the small ball H, the switch S is turned on.