2020年高考物理试卷(江苏)(解析卷)
2020年江苏省高考物理试卷一、单项选择题:本题共5小题,每小题3分,共计15分。每小题只有一个选项符合题意。1.质量为的汽车在水平路面上匀速行驶,速度为,受到的阻力大小为 。此时,汽车发动机输出的实际功率是()A.B.C.D.【答案】C【解析】【详解】汽车匀速行驶,则牵引力与阻力平衡汽车发动机的功率故选C。2.电流互感器是一种测量电路中电流的变压器,工作原理如图所示。其原线圈匝数较少,串 联在电路中,副线圈匝数较多,两端接在电流表上。则电流互感器()A.是一种降压变压器B.能测量直流电路的电流C.原、副线圈电流的频率不同D.副线圈的电流小于原线圈的电流【答案】D第1页|共23页【解析】【...
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