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The centimetre–gram–second units of current is the electrostatic unit of charge (esu) per second. It is said that there is a current - a flow of charge. One ampere is constituted by the flow one coulomb of charge per second, that is, 1A= 1C/1s. An electric circuit is a path in which electrons from a voltage or current source flow. If we connect the conductor to a battery, potential difference between the ends of the conductor occurs. Let … When electric current flows through a conductor, the conductor becomes (a) liquid (b) vapor (c) hot (d) cold (c) hot. Free charges inside this electric field are exerted a force F=q.E in this field. 1. water analogy: the flowing water is the flowing charge (aka electric current). One ampere is equal to 1 coulomb over 1 second. an insulator does not transfer electric charge well. to produce an electric current, charges must flow continuously from one place to another. The point where those electrons enter an electrical circuit is called the "source" of electrons. explain how conductors are different from insulators. The electric current is expressed by a unit called ampere (A), named after the French scientist, Andre- Marie Ampere. a conductor transfers electric charge well. Calculating Current Current can be calculated using Ohm's Law. Electric Current and Flow of Charge. the water pressure is the voltage, and the water wants to flow from high pressure to low pressure, and the pump is the voltage source, which pushes the water up to high pressure. If the two requirements of an electric circuit are met, then charge will flow through the external circuit. Yet current is a physical quantity that can be measured and expressed numerically. describe what causes electric charges to flow in a circuit. Electric current definition, the time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time: measured in amperes. See more. 6. Current is measured as the flow of electric charge over time through a given point in an electric circuit. It means the continuous flow of electrons in an electric circuit is called an electric current. A common unit of electric current is the ampere, which is defined as a flow of one coulomb of charge per second, or 6.2 × 10 18 electrons per second. In this article, we will discuss this important concept of an electrical circuit and electric current formula with examples. The point where the electrons leave an electrical circuit is called the "return" or "earth ground". Using the word current in this context is to simply use it to say that something is happening in the wires - charge is moving. 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