我们利用大型演示电流计制做了一种测定重力加速度的简易装置,简介如下。一、原理简易装置的原理如图1所示。图中重物G是一个上下表面平滑的金属块,E为电源,mA为大型演示电流计,R为可变电阻。调节R的阻值,使电路接通时, We used a large demo current meter system to make a simple device for measuring the acceleration of gravity, as described below. First, the principle of a simple device shown in Figure 1. In the picture, the weight G is a metal block with a smooth upper and lower surfaces. E is a power supply, mA is a large-scale demonstration galvanometer, and R is a variable resistance. Adjust the resistance of R so that when the circuit is turned on,