實(shí)驗(yàn)?zāi)康模?br />探究蓄電池的工作原理。
實(shí)驗(yàn)器材：
手電池。
實(shí)驗(yàn)過程：
1、先觀察儀器的結(jié)構(gòu)特點(diǎn)。（微安級數(shù)碼電流表）
2、將5伏穩(wěn)壓電源插入電源插座。
3、用左手握住鋁棒、同時(shí)用右手握住鋁棒，觀察表盤讀數(shù)的變化。
4、用左手握住銅棒、同時(shí)用右手握住銅棒，觀察表盤讀數(shù)的變化。
5、用一只手握住鋁棒、同時(shí)用一只手握住銅棒，觀察表盤讀數(shù)的變化。
探究問題：
1、同時(shí)握住相同的金屬棒，為什么沒有明顯的變化？
2、同時(shí)握住不同的金屬棒，為什么會有明顯的變化？
3、左端的鋁棒與右端的銅棒組合，右端的鋁棒與左端的銅棒組合，為什么電流方向不同？
4、手握緊或握松，對實(shí)驗(yàn)會有什么影響？
實(shí)驗(yàn)結(jié)論與體會：
（以下由學(xué)生總結(jié)并交流，也可由教師引導(dǎo)得出。）
注意事項(xiàng)：
實(shí)驗(yàn)完成后，應(yīng)及時(shí)取下穩(wěn)壓電源。
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.
