实验目的：
探究蓄电池的工作原理。
实验器材：
手电池。
实验过程：
1、先观察仪器的结构特点。（微安级数码电流表）
2、将5伏稳压电源插入电源插座。
3、用左手握住铝棒、同时用右手握住铝棒，观察表盘读数的变化。
4、用左手握住铜棒、同时用右手握住铜棒，观察表盘读数的变化。
5、用一只手握住铝棒、同时用一只手握住铜棒，观察表盘读数的变化。
探究问题：
1、同时握住相同的金属棒，为什么没有明显的变化？
2、同时握住不同的金属棒，为什么会有明显的变化？
3、左端的铝棒与右端的铜棒组合，右端的铝棒与左端的铜棒组合，为什么电流方向不同？
4、手握紧或握松，对实验会有什么影响？
实验结论与体会：
（以下由学生总结并交流，也可由教师引导得出。）
注意事项：
实验完成后，应及时取下稳压电源。
Hand battery
Experimental purpose:
Researching the principle of the storage battery
Experimental equipment:
Hand battery
Experimental process:
1.At first, observe the structure of the instrument. (microampere digital amperemeter)
2.Insert the constant-voltage power supply 5-volt into the electric outlet.
3.Grip the aluminum stick with the left hand and with the right hand grip the other aluminum stick. Observe the reading on the dial plate.
4.Grip the copper stick with the left hand and with the right hand grip the other copper stick. Observe the reading too.
5.Grip the aluminum stick with the one hand and with the other hand grip the copper stick. Also observe the reading.
Researching issues:
1.Why is there no obvious change holding the same metal stick at one time?
2.Why is there obvious change holding the different metal stick at one time?
3.Why the current direction is different when Link the left aluminum stick to the right copper and link the right aluminum stick to the left copper?
4.What is the influence on the experiment when hold tightened and laxly?
Experimental conclusions and the experience:
The followings can be concluded and discussed by the students, or guided to get by the teachers
Caution:
Cut off the power supply on time when finishing the experiment.
