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在电学实验中,我们给学生讲选取元件的原则和选取的方法,可以培养学生的求同思维和求异思维的能力。下面就谈谈我对这一问题的做法。一、选取电学元件的原则是:安全、精确、可行、方便。安全是指选用的器材要能保证在电路中正常工作不致损坏。例如通过安培表的电流、加在伏特表上的电压不能超过仪器的使用量程;通过电源、滑动变阻器的电流不能超过其额定电流;电路中的限流电阻的阻值必须满足要求,确保电流不能超过设计值等。即所有元件
In the electrical experiment, we give students the principles of selecting components and the method of selection, which can cultivate students’ ability to seek common thinking and different thinking. Let’s talk about my approach to this issue. First, the principle of selecting electrical components is: safe, accurate, feasible and convenient. Safety means that the selected equipment must be able to guarantee normal operation in the circuit without damage. For example, the current through the ampere meter and the voltage applied to the voltmeter must not exceed the range of use of the instrument; the current through the power supply and the sliding rheostat must not exceed its rated current; the resistance of the current limiting resistor in the circuit must meet the requirements to ensure that the current cannot be Exceeds the design value and so on. Ie all components