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题如图所示的电路中,滑动变阻器上标有“50欧1安”,电源电压为18伏恒定不变,R1=10欧.若电流表的量程为0-0.6安。电压表的量程为0-15伏,要使电路中各元件均能安全使用,则滑动变阻器接入电路中的阻值范围是多大? 分析接入电路的滑动变阻器的阻值与滑动变阻器的规格,电流表的量程及电压表量程有关,所以应由三个不等式进行求解.即: (1)为保证电流表不被损坏,应使电路中的电流
In the circuit shown in the figure, the sliding rheostat is marked with “50 ohms 1 ampere”, the power supply voltage is 18 volts constant, and R1 = 10 ohms. If the current meter has a range of 0-0.6 amps. The voltmeter has a range of 0-15 volts. To ensure safe use of all components in the circuit, what is the resistance range of the sliding rheostat access circuit? Analyze the resistance of the sliding rheostat and the specifications of the sliding rheostat. The ammeter range and voltmeter range are related, so it should be solved by three inequalities. That is: (1) In order to ensure that the ammeter is not damaged, the current in the circuit should be