知识点1 电流 1. 形成原因:电荷的定向移动。 2. 形成条件:有电源;电路是闭合的。 3. 电流的方向:正电荷定向移动的方向规定为电流的方向。 4. 关于电流的几点说明 (1)金属中电流是...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 电流的测量 一、国际单位:安培(A);常用单位:毫安(mA),微安(A),1安培=103毫安=106微安...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 串、并联电路中电流的规律 串联有以下特点: 电流:串联电路中各处的电流相等 I=I1...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 串联和并联 一、串联 1.串联:把元件逐个顺次连接起来叫串联。任意处断开,电路中都...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 两种电荷 我们人类认识电现象,是从摩擦生电开始的。我国很早就已经发现电和磁的现...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 电流和电路 一、电流 1.电流的形成:电荷的定向移动形成电流。任何电荷的定向移动都...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 电路的三种状态 (1)通路:正常接通的电路(电路中有电流通过,用电器能够正常工作)...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 电流与电压的关系...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 常见的两种电路故障 断路:开关未闭合、导线断裂、接头松脱等(电路中无电流,用电器...
'); (window.slotbydup=window.slotbydup || []).push({ id: '8096091', container: s, size: '580,90', display: 'inlay-fix' });})(); 电路图 1. 电路图:用统一规定的符号表示电路连接的图。 2. 画电路图的注意事项 (1)要...