电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压...电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压后正常运转,此时两端的电流为2A,求M的输出功率很容易

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电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压...电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压后正常运转,此时两端的电流为2A,求M的输出功率很容易

电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压...电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压后正常运转,此时两端的电流为2A,求M的输出功率很容易
电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压...
电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压后正常运转,此时两端的电流为2A,求M的输出功率
很容易求出电动机M的内阻r=4Ω,求M的热功率时究竟是用未转动时的电流还是转动时的电流?

电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压...电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压后正常运转,此时两端的电流为2A,求M的输出功率很容易
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电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压...电动机M接上2V的电压,没转,此时它两端的电流为0.5A,当接上24V的电压后正常运转,此时两端的电流为2A,求M的输出功率很容易 高二物理(焦耳定律):有一个小电动机,当把它接在2V的电压上时,通过它的电流为0.5A有一个小电动机,当把它接在2V的电压上时,通过它的电流为0.5A,此时电动机不转.若将该电动机接在24V电压 一个玩具车使用的电动机,当把它接入0.2V电压的电路时,电动机不转,测得流过电动机的电流是0.4A;若把它接入2V电压的电路中,电动机正常工作,测得此时流过电动机的电流是1A.那么该电动机线 一个关于蓄电池的问题.一节蓄电池在没接负载的情况下测它两端的电压,测得是3.8V左右.当在它两端接上负载的时候测它两端的电压,测得是2V左右,这是怎么回事?两次测得的电压为什么会不同. 电动机的工作效率怎么求?当把一个玩具车使用的电动机接入0.2V电压的电路时,电动机不转,测得流过电动机的电流是0.4A;若把它接入2V电压的电路中,电动机正常工作,测得此时流过电动机的电 一个玩具车的电动机,当把它接入0.2V电压的电路时,电动机不转,测得流过电动机的电流是0.4A,此时能量转化是电能转化为 能;若把它接入2V电压的电路中,电动机正常工作,测得此时流过电动 一个玩具车的电动机,当把它接入0.2V电压的电路时,电动机不转,测得流过电动机的电流是0.4A,此时能量转化是电能转化为 能;若把它接入2V电压的电路中,电动机正常工作,测得此时流过电动 一只小灯泡正常工作时的电流为0.5 A,在它的两端接上3 V电压时,恰好正常发光,这时小灯泡的功率为 W,0.5 A是该灯的 电流当灯泡两端的电压为2V时,测得通过灯泡的电流为0.4A,此时灯泡的电功 微型吸尘器的直流电动机内阻一定.当加上0.3V的电压时,通过的电流为0.3A,此时电动机不转当加在电动机两端的电压为2V时,电流为0.8A,这是电动机正常工作,则吸尘器的效率为多少? 某同学在做玩具直流电动机实验,当家在电动机两端的电压为0.3v时,测得流过电动机的电流为0.3A此时电动机不转动.当电动机两端两端的电流增大为2.0v时,电动机正常工作,此时流过电动机的电 请问一个钳位二极管的负极接上+5V电压,如果此时在它正极也接上一个-12V电压,会出现什么后果? 物理题 电动机两端电压0.2v电流0.1 此时电动机不转动 当其两端电压为3v时电流0.4 电动机电动机两端电压0.2v电流0.1 此时电动机不转动 当其两端电压为3v时电流0.4 电动机正常转动 求 电动机线 电动机的电阻为5欧,两端所加电压为6v,此时电流为0.4a 求电动机的电功率和热功率分是多少 有一个直流电动机,把它接入0.2v电压的电路时,电动机不转,测得流过电动机的电流是0.4A;若把它接入2V电压的电路中,电动机正常工作,工作电流是1A,如在正常工作时,转子突然被卡住,此时电动 微型吸尘器的直流电动机内电阻一定,当加上0.3V的电压时,通过的电流为0.3A,此时电动机不转,当加在电动机两端的电压为2.0V,电流为0.8A,这是电动机正常工作,则吸尘器的效率为多少? 微型吸尘器的直流电动机内阻一定,当加上0.3V电压时,通过的电流0.3A,此时电动机不转,当加在电动机两端电压2.0V时,通过电流0.8A,这时电动机正常工作,则吸尘器的效率为多少?(效率的公式是什 当加上1V电压 电流为0.25A 电动机没转 当加上2V电流为0.4A时转动 电动机的电阻为多少 1给小电动机加上U1=0.3V的直流电压,电动机不转…用理想电流表测的I1=0.48A…2给电动机加上U2=1.5V的直流电压,电动机正常运动…此时I2=0.8A…这个电动机内阻r是?在2中,电动机消耗的总功率p