a为使通过用电器的电流不超过额定值或实际工作需要的规定值,以保证用电器的正常工作,通常可在电路中串联一个可变电阻。当改变这个电阻的大小时,电流的大小也随之改变,我们把这种可以限制电流大小的电阻叫做限流电阻。 In order to cause through to use the electric appliance the electric current not to surpass ...
Electrical circuit in order to reduce the electromagnetic fields in the vicinity of an electrolyser comprising the electrolyser and an electrical line comprising at least a bus-bar for the return of the current flowing in the electrolyser, comprising a power supply by means of at least two ...
Since current always creates a magnetic field, there are Hall Effect and other sensors that allow us to measure this field and thereby measure the current. It is also possible to connect a shunt resistor within the circuit itself and directly measure the current, as in the classic ammeter an...
To reduce voltage in half, we simply form a voltage divider circuit between 2 resistors of equal value (for example, 2 10KΩ) resistors. To divide voltage in half, all you must do is place any 2 resistors of equal value in series and then place a jumper wire in between the resistors....
If you wanted to increase the current through an electrical device which of these could you do? Check all answers that apply.相关知识点: 试题来源: 解析 Increase the potential difference across the deviceDecrease the resistance of the device ...
【题目】Lightning is a__of electrical current from acloud to the ground or from one cloud to another.A、rushB、rainbowC、racD、ribbon 相关知识点: 试题来源: 解析 【解析】答案:A核心短语/句式:lightening:闪电翻译:闪电是从云到地面或到另一块云的电流。解析:词语辨析题。a rush of electrical ...
Alternating current, or AC power can be found in any electrical power outlet installed in most standard homes and businesses in the United States. This type of power circuit is unique in that the flow of charge can periodically change direction. ...
member is driven from the first position to the second position; and, a current limiter connected to the drive circuit to detect the current supplied to the drive member, said current limiter operable upon detection of an increased current above the first level to reduce the current level ...
Which of the following devices is used to measure electrical current? A. Voltmeter B. Ammeter C. Ohmmeter D. Galvanometer 相关知识点: 试题来源: 解析 B。本题考查电学测量仪器。选项 A“Voltmeter”是电压表,用于测量电压;选项 B“Ammeter”是电流表,用于测量电流;选项 C“Ohmmeter”是欧姆表,用于测量...
doi:US3590276 AWATSON JOHN DUSUS3590276 * 1969年4月24日 1971年6月29日 Westinghouse Electric Corp Circuit for producing an electrical pulse which occurs at some fixed phase angle with respect to an alternating current input voltage