论文部分内容阅读
打点计时器是高中物理力学实验中的常用仪器,它每打一点的时间是一个必须测量的物理量。整个测试装置如图1所示。开关 K 并联在计时器电路的10Ω滑动变阻器 R 两端,它是用香烟盒或旧电容器内的铝箔纸制成,如图2所示。测试开始时,首先勿使摆球摆动,按图1接通电源、拖动纸带并调节 R(一般调至5Ω左右)使纸
The dot timer is a commonly used instrument in high school physics and mechanics experiments. The time it takes to hit a point is a physical quantity that must be measured. The entire test device is shown in Figure 1. The switch K is connected in parallel across the timer circuit’s 10Ω sled R, which is made of aluminum foil in a cigarette box or an old capacitor, as shown in Figure 2. At the beginning of the test, first of all, do not swing the pendulum ball, switch on the power supply according to Figure 1, drag the tape and adjust R (usually adjusted to about 5Ω) to make the paper