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滑动变阻器可以改变电路中的电流大小,从而起到限制电流保护电路的作用.它是我们在进行有关电学的科学探究时必不可少的器材之一,在生产、生活中都得到了广泛的应用.
Sliding rheostats can change the size of the current in the circuit, thus limiting the role of the current protection circuit. It is one of the indispensable devices for conducting scientific inquiry into electricity and has been widely used in production and life. .