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滑动变阻器滑片的移动,改变了其接入电路的电阻值,引起电路中的电流改变、电路元件两端的电压重新分配,求解此过程中滑动变阻器阻值变化的范围,要遵循一定的分析、解答思路.首先,看清楚滑动变阻器与其它元件的连接情况.是串联、并联还是混联,滑片移动时接入电路的电阻如何变化,整个电路中各部分的电流和电压如何变化.其次,确定各个元件允许的最大电流或最大电压,以不烧坏用电器、电流表或电压表等电路元件为原则.
Sliding rheostat vane movement, changing the resistance of its access circuit, causing the current in the circuit changes, the voltage across the circuit components redistribution, to solve the process of sliding rheostat resistance changes in the range, to follow a certain analysis, First, look at the sliding rheostat connection with other components. Is the series, parallel or hybrid, the vane moves the resistance of the access circuit changes, the entire circuit in the various parts of the current and voltage changes.Secondly, Determine the maximum allowable current of each component or the maximum voltage, in order not to burn out the electrical components such as ammeter, ammeter or voltmeter principle.