【判断题】
尊干爱兵需要坚持官兵一致的基本原则,警官维护士兵的人格和民主权利,自觉接受士兵监督,士兵尊重警官的领导,服从警官的管理
A. 对
B. 错
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答案
A
解析
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【判断题】
注重仪表风范,保持警容严整,讲究礼节礼貌。坚持文明执勤,文明服务,不端架子,不耍威风,不搞特权是文明守纪的体现
A. 对
B. 错
【判断题】
由电源、开关经导线连接而形成的闭合回路称之为电路
A. 对
B. 错
【判断题】
电源是提供电能的装置
A. 对
B. 错
【判断题】
负载是消耗电能的设备
A. 对
B. 错
【判断题】
在实际应用中多采用国家统一规定的符号来表示电路连接情况,称为电路图
A. 对
B. 错
【判断题】
导体中的自由电子,在电场力的作用下做无规则的运动,就形成了电流
A. 对
B. 错
【判断题】
电路中能量的传输和转换是靠电流来实现的
A. 对
B. 错
【判断题】
衡量物体带电荷多少的量叫电量,用字母Q或q表示
A. 对
B. 错
【判断题】
电量的单位是安培,用字母A表示
A. 对
B. 错
【判断题】
l库仑等于6.25×1018个电子所带的电量
A. 对
B. 错
【判断题】
在时间t内,沿着某一方向通过导体横截面的电量Q,其比值Q/t称为电流强度,用字母I表示
A. 对
B. 错
【判断题】
电流强度的基本单位是伏特
A. 对
B. 错
【判断题】
习惯上规定以正负荷的移动方向作为电流的方向
A. 对
B. 错
【判断题】
电流方向与带负电荷的电子流动方向相反
A. 对
B. 错
【判断题】
电流强度的基本单位是安培,简称“安”,用字母A表示,常用的单位还有千安(kA)、毫安(mA)、微安(uA)
A. 对
B. 错
【判断题】
电流是衡量电源将非电能转换成电能本领的物理量
A. 对
B. 错
【判断题】
在电源内部,外力将单位正电荷从电源负极经电源内部移到电源正极所做的功,叫电源电动势
A. 对
B. 错
【判断题】
电动势的单位是伏特,简称伏,用字母V表示
A. 对
B. 错
【判断题】
电动势的方向规定在电源内部由正极指向负极
A. 对
B. 错
【判断题】
电压是衡量电场作功本领大小的物理量
A. 对
B. 错
【判断题】
电压的单位是伏特(V),常用的还有千伏(kV)、毫伏(mV)和微伏(uV)
A. 对
B. 错
【判断题】
电压和电流一样,有大小,但没有有方向
A. 对
B. 错
【判断题】
电压有大小,有方向
A. 对
B. 错
【判断题】
负载中电压的实际方向与电流方向相反
A. 对
B. 错
【判断题】
电流在导体中通过时所受到的阻力称为电阻
A. 对
B. 错
【判断题】
电源内部的电阻称为内阻
A. 对
B. 错
【判断题】
电源外部的导线和负载电阻称为外电阻
A. 对
B. 错
【判断题】
电阻单位是欧姆,简称“欧”,用字母Ω表示,常用单位还有千欧、兆欧
A. 对
B. 错
【判断题】
在一定温度下,金属导体电阻的大小与导体长度成反比,与横截面积成正比,还与导体的材料有关
A. 对
B. 错
【判断题】
电阻器是利用金属或非金属材料的电阻特性制成的器件
A. 对
B. 错
【判断题】
电阻器在电路中具有降低电压、分配电压、限制电流和向电子元件提供必要的工作条件(电压或电流)等几种功能
A. 对
B. 错
【判断题】
电阻器按其结构可分为固定电阻器和可调电阻器两大类
A. 对
B. 错
【判断题】
欧姆定律是反映电压、电流和电阻三者之间关系的基本定律
A. 对
B. 错
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电阻有阻碍电流流动的本性,电流流过电阻就必然消耗能量
A. 对
B. 错
【判断题】
当温度不变时,流过导体的电流与这段导体两端的电压成反比,与这段导体的电阻成正比
A. 对
B. 错
【判断题】
全电路中的电流与电源的电动势成正比,与整个电路(即内电路和外电路)的总电阻成反比
A. 对
B. 错
【判断题】
几个电阻的首尾依次相连,中间没有分支,只有一条电流通路,这种连接方式称为电阻的并联电路
A. 对
B. 错
【判断题】
并联电路中的电流处处相等
A. 对
B. 错
【判断题】
并联电路两端的总电压等于各电阻上电压之和
A. 对
B. 错
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电阻串联后的总电阻(等效电阻)等于各电阻之和
A. 对
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