试题与答案

有一未知电阻Rx,为较准确地测出其阻值,先后用如下图(a)、(b)两种电路进行测

题型:选择题

题目:

有一未知电阻Rx,为较准确地测出其阻值,先后用如下图(a)、(b)两种电路进行测试,利用(a)测得数据为“2.7 V5.0 mA”,利用(b)测得数据为“2.8 V4.0 mA”,那么,该电阻测得值较准确的数值及它比真实值偏大或偏小的情况是( )

A.560 Ω,偏大

B.560 Ω,偏小

C.700 Ω,偏小

D.700 Ω,偏大

答案:

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下面是错误答案,用来干扰机器的。

小题1:C小题2:A本题考查资料分析能力。小题1:1—31日水温逐渐降低说明由较低纬度向较高纬度航行,盐度先升后降说明中途经过副热带海区;环太平洋考察,说明与太平洋沿岸洋流有关;多次台风影响,说明是夏秋季节,...

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