What is an electrical current used for? A. Causing the body to burn its fat. B. Controlling the body’s storage of fat. C. Seeing if the headset will be affected. D. Speeding the process of one’s digesting. 相关知识点: 试题来源: 解析 A ...
Electrical current definitionElectric current definition: An electric current is a flow of electric charge in a circuit. More specifically, the electric current is the rate of charge flow past a given point in an electric circuit. The charge can be negatively charged electrons or positive charge ...
The symbol for electric current in formulas is “I” or “i”. The unit for current is the ampere (A). Mathematically, the flow rate of charge with respect to time can be expressed as, In other words, a stream of charged particles flowing through an electrical conductor or space is ...
Electrical currentis the flow of charged particles. It is similar to flow of water molecules in a river. AC and DC are ways of flow of current an electrical circuit.Electric charge or current can flow only in one direction (DC) or in the charge can change direction periodically (AC). Wh...
What is the Ampere? What is a Current Transformer? What is an Electrical Circuit? Discussion Comments ByMrMoody— On May 21, 2011 We had an ice storm a few years back and there were major power outages all over town. It seemed like everyone was buying an electric current generator. Howev...
Ohm's law says that in an electrical circuit, the current passing through a resistor between two points, is related to the voltage difference between the two points, and inversely related to the electrical resistance between the two points. This relation is shown in the following pee ...
D. To change the direction of the current. 相关知识点: 试题来源: 解析 C。解析:保险丝在电路中的主要作用是防止过载。选项 A,保险丝不能增加电压。选项 B,测量电流的是电流表等仪器。选项 D,保险丝不能改变电流方向。阅读时要抓住“fuse”“electrical circuit”等关键词理解其在电路中的作用。
and the whole thing is a current-electric happening. It is an electrical phenomenon; an example of "current electricity." But no "current electricity" flows in the wires. Instead, the lighting of the bulb, the turning of the switch, the magnetic fields around the wires, and the unseen mot...
Electrical transmission towers support wires that carry electricity from power plants to homes.(Image credit: long8614 | Shutterstock.com) Electric current is electric charge in motion. It can take the form of a sudden discharge of static electricity, such as a lightning bolt or a spark between...
The wide range of electrical conductivity makes it possible to control and modulate the magnitude of the conductivity by applying a time-dependent voltage,current,light,temperature,or mechanical force. In contrast,metal has so many conduction electrons that it is difficult to change its conductivity ...