摘要
用发光二极管代替电流计,对电磁感应现象和电磁振荡等演示实验进行改进后,明显提高了实验的效果。本文就此方面进行了阐述。
In the demonstration experiments with electromagnetic induction and electromagnetic oscillation, a galvanometer can be replaced by a light - emitting diode. The innovation improves obviously experimental results.
