Electric current - Wikipedia
An electric current is a flow of charged particles, such as electrons or ions, moving through an electrical conductor or space. It is defined as the net rate of flow of electric charge through a surface.
Electric Current and Current Flow - Electrical Classroom
Electric current is normally referred to as the flow of charges through a conductor. It can be defined as the amount of charge that flows past a cross-section area in a conductor. In other words, the term “current” can be defined as the rate of flow of charges through a conductor.
9.2: Electrical Current - Physics LibreTexts
The rate at which the charges flow past a location—that is, the amount of charge per unit time—is known as the electrical current. When charges flow through a medium, the current depends on the voltage applied, the material through which the charges flow, and the state of the material.
20.1: Current - Physics LibreTexts
Current is the flow of free charges, such as electrons and ions. Drift veloctiy \(v_{d}\) is the average speed at which these charges move. Current \(I\) is proportional to drift velocity \(v_{d}\), as expressed in the relationship \(I = nqAv_{d}\).
Electric Current: What is it? (Formula, Units, AC vs DC)
2021年5月9日 · Electric current is defined as a stream of charged particles—like electrons or ions—moving through a conductor or space. It measures how fast electric charge flows through a medium over time. The symbol for electric current in formulas is “I” or …
Electric Current - HyperPhysics
Electric current is the rate of charge flow past a given point in an electric circuit, measured in Coulombs/second which is named Amperes. In most DC electric circuits, it can be assumed that the resistance to current flow is a constant so that the current in the circuit is related to voltage and resistance by Ohm's law.
Electric Current- Definition, Formula, Ohm's Law, Solved Examples
2024年8月23日 · Electric current is the flow of electric charge through a conductor. It is a measure of the rate at which electric charge passes through a particular point in a circuit. In simpler terms, electric current is the movement of electrons or ions in a closed circuit, typically resulting from the presence of a voltage difference across the circuit.
请问：current, flow, stream这三种“流”在物理中有什么区别吗？
current强调运动、趋势，而忽略各类细节，常用于潮流、电流、洋流。 例如，洋流可以存在局部循环，分支等等，但整体有个大的运动趋势。 flow则强调“通过”这一动作，不在流动是否连续，也不在乎它从哪里来到哪里去，常用于气流、水流、流量、流动。
9.1 Electrical Current – University Physics Volume 2
The rate at which the charges flow past a location—that is, the amount of charge per unit time—is known as the electrical current. When charges flow through a medium, the current depends on the voltage applied, the material through which the charges flow, and the state of the material.
How Does Electricity Flow? | Explanation and Review
2023年10月19日 · Electricity is the flow of electric charge, which, in most household contexts, means the movement of electrons through a conductor. These electrons move from areas of negative charge to areas of positive charge, creating an electric current. In conductive materials, such as metals, some electrons are free to move.
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