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Electric current is a flow of charge why two wires rather a single is required?
Wiki User
∙ 7y ago
If the current flows only in one direction, it will flow for a very short time - due to the electric charge that builds up. For example excess electrons will build up on one side, and stop any further electrons from coming in.
Wiki User
∙ 7y ago
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What is the principle of ballistic galvanometer?
when current passes through a coil of b.g then it rotates in a magnetic field and measures the quantity of charge rather than current
What term would you use to describe the attraction between two objects?
Rather depends on the objects and what you are measuring! Gravitational, magnetic or electric charge.
What allows electricity to move through materials?
electricity doesnt move...its the electrons...rather free electrons in materrials that moves nd we call it as electric current
Energy carried by current?
For DC: power (in watts) = current (in ampere) x voltage (in volts). Energy = power x time, so energy = current x voltage x time (time in seconds). For AC, a power factor may have to be included (the cosine of the angular displacement between current and voltage). This is often near one, but it may be less.
What does electromagnets do?
It is the joining of electricity and magnetic field, it is the study if the interaction between the two.
Electric current is sometimes incorrectly defined as simply a flow of electrons What is wrong with this definition?
Electric current is the rate of flow of electrons.AnswerA more accurate definition of electric current would be that it is a flow of electric charges. While current flow in a metallic conductor is, indeed, a flow of electrons, in other conductors -such as electrolytes- current flow may be a movement of ions. So, it would be more accurate to define current in terms of charge flow, rather than in terms of electron flow.
Is a transformer a source of constant electric current?
A; Terminology is not correct a transformer is not really a source but rather a device to transform one source of power to some power that can be used as required minus efficiency of power transfer
Is a transformer one source of constant electric current?
A; Terminology is not correct a transformer is not really a source but rather a device to transform one source of power to some power that can be used as required minus efficiency of power transfer
What Kind of Criminal Charge Is A Release On Recognizance?
A release on recognizance is not a criminal charge, but rather a type of pretrial release where a defendant is not required to post bail but is released based on their promise to appear in court as required.
What is the principle of ballistic galvanometer?
when current passes through a coil of b.g then it rotates in a magnetic field and measures the quantity of charge rather than current
What is the measure of how difficult it is for electrons to flow through a material?
You are probably looking for an answer like 'resistance' or 'resistivity', but these answers would be incorrect, because your supposition ('difficulty of flow') is incorrect .Resistance is the opposition to the drift of an electric current through a material. It's determined by the resistivity of that material, as well as by the length and cross-sectional area of that material.This opposition, however, is not a measure of the 'difficulty' of charge movement through the material. Rather, it is a measure of how well a material can support current due to the quantity of charge carriers available within the material.It's important to understand, for example, that insulators don't 'block' or 'make it difficult' for electric current, they simply don't have sufficient charge carriers available to supportelectric current.
What term would you use to describe the attraction between two objects?
Rather depends on the objects and what you are measuring! Gravitational, magnetic or electric charge.
Why are the charge carriers in a current rather electrons than protons?
Proprons carry a positive charge and are located in the heart of the atom called Nucleous where they can not easily be disloged without destroying the atom or element if you wish. And since we are talking about current then th best examples would be a copper cable to your light builb or a Gold strip on your tv PCB. Electrons are located on the outer sphere of the nucleus and the outer most layer's electrons in good electric conducting elements are not firmly bonded making it easy for them to move or jump from one atom to another hence allowing an electric current to flow.
Is an electric current a movement of electrons at near the speed of light?
No. The current travels near the speed of light; the individual electrons don't. Rather, energy is transferred from one electron to the next.
What does hydrelectricity do?
Hydroelectricity does what all electricity does. Hydro refers to the source of the electricity (generated by moving water) rather than the nature of the electric current itself.
Are most metals electrical insulators?
No, most metals are electrical conductors. This means that most metals will conduct an electric current in the presence of an electric field.
Why current density is vector quantity?
Current is not scalar. Current is a vector quantity. For simplicity, in electric circuits, current is scalar because the direction is assumed to be one way or another, rather than three dimensional.
