[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fbQQsLljdmXRDzy7WQDENfjMvgk6dt_prSdyhpFAyY-M":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-12-12 07:37:46",260892721,[8,9,10,11],"R","2R","4R","8R",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},74,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_48852772","电阻定律","一根导线的电阻为R,若将其长度加倍,横截面积减半,则新电阻为:‌",[21,32,41,44,53,62,71,80,86,95],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],260892719,[25,26,27,28],"电阻与导体的长度成反比","电阻与导体的横截面积成正比","电阻率与导体的形状有关","电阻与长度成正比,与横截面积成反比","关于电阻定律,下列说法正确的是:‌","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],260892720,[36,37,38,39],"欧姆(Ω)","欧姆·米(Ω·m)","欧姆\u002F米(Ω\u002Fm)","米\u002F欧姆(m\u002FΩ)","电阻率的国际单位是:‌",{"answer":42,"createTime":5,"id":6,"options":43,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":45,"createTime":5,"id":46,"options":47,"question":52,"source":30,"type":31},[],260892722,[48,49,50,51],"电阻率与导体的长度成正比","电阻率与导体的横截面积成反比","电阻率是材料本身的属性,与温度有关","电阻率与温度无关","关于电阻率,下列说法正确的是:‌",{"answer":54,"createTime":5,"id":55,"options":56,"question":61,"source":30,"type":31},[],260892723,[57,58,59,60],"1\u002F2倍","2倍","4倍","8倍","两根相同材料的导线,甲的长度是乙的2倍,乙的直径是甲的2倍,则甲的电阻是乙的:‌",{"answer":63,"createTime":5,"id":64,"options":65,"question":70,"source":30,"type":31},[],260892724,[66,67,68,69],"10Ω","20Ω","40Ω","80Ω","一根导线的电阻为10Ω,如果将其均匀拉长为原来的2倍,则拉长后的电阻为:‌",{"answer":72,"createTime":5,"id":73,"options":74,"question":79,"source":30,"type":31},[],260892725,[75,76,77,78],"铜线","铁线","一样大","无法比较","在相同温度下,铜和铁的电阻率分别为ρ铜和ρ铁,且ρ铜 < ρ铁.则相同长度和横截面积的铜线和铁线,电阻较大的是:‌",{"answer":81,"createTime":5,"id":82,"options":83,"question":85,"source":30,"type":31},[],260892726,[84,8,9,10],"R\u002F2","一个电阻器的电阻值为R,如果将其材料换成电阻率减半的材料,其他条件不变,则新电阻为:‌",{"answer":87,"createTime":5,"id":88,"options":89,"question":94,"source":30,"type":31},[],260892727,[90,91,92,93],"仅材料","仅长度和横截面积","材料、长度和横截面积","仅温度","导体的电阻大小主要取决于:‌",{"answer":96,"createTime":5,"id":97,"options":98,"question":103,"source":30,"type":31},[],260892728,[99,100,101,102],"1:1","1:4","4:1","1:2","两根导线A和B,材料相同,长度之比为1:2,横截面积之比为2:1,则电阻之比R_A : R_B为:‌"]