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1.用多用表测一个电阻的阻值,多用表的“Ω”挡有“×1”、“×10”、“×100”三挡,先选用“×10”挡,调零后测量结果如图1.这说明被测电阻很__(填“大”或“小”),应换用__挡,并重新调零后再测量.2.实验室内有一只指针在中间的灵敏电流表G,其刻度盘如图2,其一侧的总格数为N,满偏电流、满偏电压、内阻均未知,但估计满偏电流不超过1mA,内电阻大约不超过100Ω,现要较准确地测定其满偏电
1. Use a multimeter to measure the resistance of a resistor, multimeter “Ω ” block “ 1 ”, “X10 ”, “X100 ” third gear, first choose “X 10 ”block, zero after the measurement results shown in Figure 1. This shows that the measured resistance is __ (fill “ big ”or “ small ”), should be replaced with __ block, and then zero again Measurement .2. The laboratory has a pointer in the middle of the sensitive ammeter G, the dial in Figure 2, the total number of cells on one side of the N, full bias current, full bias voltage, internal resistance are unknown, but estimated full Partial current does not exceed 1mA, the internal resistance does not exceed about 100Ω, it is necessary to more accurately determine its full bias