测量可导电流体在管中的流量通常采用电磁流量计,其原理是法拉第电磁感应定律.驱动液体在管中流动通常采用电磁泵,其原理是磁场对通电导体的作用力.下面通过两道高考题对这两种装置进行分析. Measuring the flow of conductive fluid in the tube usually uses electromagnetic flowmeters, the principle of which is Faraday’s law of electromagnetic induction. Electromagnetic pumps are usually used to drive the flow of liquid in the tube. The principle is the force of the magnetic field on the energized conductor. The following two entrance exams Questions are analyzed on these two devices.