【简答题】![](https://cos-cdn.shuashuati.com/shuashuati-web/2024-0521-0905-00/logo-new-ad743.png)
要测定一台直流电动机的效率.给你电源、电压表、电流表、滑动变阻器、开关、砝码盘(已知质量)砝码若干、停表、刻度尺、细绳一根、导线若干.(1)请你在答题纸相应的空白处画出实验电路图.(2)本实验要测定的物理量是F及______、______、______、______、.(3)如果某同学根据测得的数据计算出P出=0.18w; P入=0.21w.则大体可计算出该直流电动机的效率η=______.(4)如果要比较准确地得到该直流电动机的效率可采取的方法是:______.(5)根据实验可得到直流电动机的效率总是:______1.(选填“<”、或“>”、或“=”)(6)如果有一台电动机的效率是85%,请分析它的能量转换情况:______.
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