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物理实验经常需要灯作为演示仪器,发光二极管相比传统的白炽灯、纳光灯等光源,具有体积小、寿命长、价格便宜、发光效率高等特点。在物理实验中灵活地应用LED,可以增强物理实验的演示效果。一、LED在电磁感应现象演示实验中的应用原电磁感应现象演示实验是使用电流计来测量电路中有无感应电流和感应电流的方向的。在观察电流计指针偏转时,在演示实验前,需要先验证电流方向与指针偏转方向的关系。而指针偏转现象由于
Physics experiments often require lamps as a demonstration instrument, light-emitting diodes compared to traditional incandescent lamp, light and other light sources, with small size, long life, cheap, high luminous efficiency and so on. Flexible application of LEDs in physics experiments can enhance the demonstration of physics experiments. First, the LED in the electromagnetic induction phenomenon demonstration experiment The original electromagnetic induction phenomenon demonstration experiment is to use the ammeter to measure the presence of induction current and induced current in the circuit direction. When observing the galvanometer pointer deflection, before demonstrating the experiment, you need to verify the relationship between the current direction and the pointer deflection direction. The pointer deflection phenomenon due to