Electronics - Voltage and Current - Discussion


When considering conventional current versus electron current flow:

[A]. electron current flow came first
[B]. protons move in conventional current flow
[C]. conventional current flow came first
[D]. the direction of current is the same in both methods

Answer: Option C


No answer description available for this question.

Srinevasan.M said: (Nov 20, 2010)  
The conventional current flow method only at first when they discovered the electricity but they were wrong. But now we are using electron flow only in current era.

Mana said: (Nov 27, 2010)  
Answer should be Protons move in conventional current flow.

Girish said: (Jan 8, 2011)  
I am confused what is question.

Nishant said: (Jan 13, 2011)  
Whats the reason for this answer???

Ramalakshman . R .K said: (Jan 14, 2011)  
Current flows in opposite direction to electron and same direction of proton but first in conventional method they made mistake in direction of flow of current, which is rectified in electron current flow.

Vasu said: (Jan 31, 2011)  
I was not clarified with these explanation.

Nandhu said: (Feb 6, 2011)  
The conventional current and the electrons are moving when we give the supply. Then how you know which is came first.

In a closed circuit, the conventional current flows postive to negative charge and the electrons moving negative to positve terminal. Then how you know which is first.

Ravi Sharma said: (Feb 12, 2011)  
It should be (b) because conventional current is the direction of +ve charge. So there is no matter of speed. How one can judge the speed ?.

Rishu said: (Feb 20, 2011)  
Conventional current flows in opposite direction as that of electron flow.

Sai Kumar said: (Mar 5, 2011)  
What is mean by conventional current?

Bharath said: (Mar 19, 2011)  
No clear explanations. First explain what is conventional current and electron current.

Pradeep said: (Apr 25, 2011)  
Conventional current flow refers to a flow of positive charges. It is a kind of ficticious current. If - as is often the case - the real current is an electron flow (negative charges) , then the conventional flow is a current in the opposite direction as the electron movements, since this would have the same effect (for example on the magnetic field, or on conservation of charge).

Amit Kamboj said: (May 10, 2011)  
I can't understand the question and answer also?

Gdk said: (May 20, 2011)  
Conventional Current assumes that current flows out of the positive terminal, through the circuit and into the negative terminal of the source. This was the convention chosen during the discovery of electricity. They were wrong!

Electron Flow is what actually happens and electrons flow out of the negative terminal, through the circuit and into the positive terminal of the source.

Both Conventional Current and Electron Flow are used by industry. Many textbooks are available in both Electron Flow and Conventional Current formats.

In fact, it makes no difference which way current is flowing as long as it is used consistently. The direction of current flow does not affect what the current does.

In general, two year technical programs and highschool Physics use Electron Flow.

But three year technician and university engineering programs still use Conventional Current. Certain symbols (ex. diodes and transistors) and rules (ex. Right hand rules for electromagnets) were created using Conventional Current. Changing from Conventional Current to Electron Flow would cause a degree of confusion for old and new students and errors would occur, so Conventional Current was kept to ensure there was no confusion.

Throughout this course, Conventional Current is used. Therefore always assume current flows out of the positive terminal of the source.

A.K. Tiwari said: (Jun 25, 2011)  
IN this question it is asked which current flow came first
it is about it time of invention or launching not its speed

so the answer is conventional flow of current is used fist in curcuit anlaysis

Ooty said: (Aug 14, 2011)  
Well said gdk. . . . I agree.

Ravi said: (Aug 16, 2011)  
Answer should be Protons move in conventional current flow & it is opposit to the electron current flow direction.

Debashree said: (Sep 26, 2011)  
Still I can't understand, what is conventional current and why conventional current flow came first. Please explain me in a simple way.

Mayur said: (Oct 21, 2011)  
Please tell me, what is mean by conventional current ?

Ka$H said: (Nov 5, 2011)  
Direction in which an electric current is considered to flow in a circuit. By convention, the direction is that in which positive-charge carriers would flow - from the positive terminal of a cell to its negative terminal. It is opposite in direction to the flow of electrons. In circuit diagrams, the arrows shown on symbols for components such as diodes and transistors point in the direction of conventional current flow.

Nag said: (Dec 8, 2011)  
First electrons flow always negative to positive and conventional current flow positive negative to.

Then A is the answer.

Kani said: (Jan 3, 2012)  
I'm clarified by gdk. Thank you!

Ashish Sharma said: (Apr 7, 2012)  
Whatever we studied in B-Tech we always talking about current like what is the direction of current, where current is flowing etc. We all are habitual to talking like this that the "flow of current". But fact is that current never flows it is the electron which flows and some new school students are teaching in this way they don't use current flow. They use where electron is flowing, what is the direction of electron flow. This is the modern approch and came later. Thats why answer is C.

Manikanta said: (Apr 19, 2012)  
Conventional current means protons flow. But electrons flow is much much greater the the protons. So electrons move faster than conventional current. But answer is reverse. Can any one explain it. Please.

Venkatesh Madhamanchi said: (Apr 29, 2012)  
Yes @manikanta my explanation is very near to you.

coventional current= protan flow
electron current = electron flow

Electron weight is about 1/1800th weight of proton's weight.
so electron flow will be faster than the protons flow.

and the present elctronic era is considering only electronic corrent...
So my answer is electronic current comes first..
Answer should be "a"

Raj said: (Aug 9, 2012)  
Conventional current is due to the migration of holes (i. E flow of protons). Hole is nothing but proton, hole forms due to the lose of electron. And this current flows in opposite direction to the electron current.

Vidya said: (Aug 18, 2012)  
Thank you Gdk.

Aps said: (Aug 21, 2012)  
What is conventional current?

Rathore said: (Oct 15, 2012)  
Why firstly convention current flow in circuit ?

Please give proper reason.

Simpi said: (Nov 8, 2012)  

Here the question is not about flow of current. Its about concept, I mean which concept first propose to explain the flow of current in a circuit.

Srikant Tavhare said: (Nov 23, 2012)  
Conventional current is due to the migration of holes (i.e flow of protons). Hole is nothing but proton, hole forms due to the lose of electron. Conventional current flows from +ve to -ve direction. It means holes reached first than electron to destination.

Ksk said: (Jan 13, 2013)  
Hole is NOT proton. It is deficiency or absence of electron. So when any hole is moving from point A to any other point B it means an electron is moving from point B to point A. I mean it is wrong saying which current flows first or second.

Chandan said: (Jan 30, 2013)  
Proton flow in the direction of conventional current.

Sairam V M said: (Jul 8, 2013)  
Above @Ksk had the exact explanation of electron-hole theory, hole flow direction is considered as conventional flow direction and protons are not holes, holes are the vacant spaces left due to the motion of electrons. So, conventional flow is exactly opposite to the flow of electrons.

Raj said: (Jul 20, 2013)  
Conventional current flow when no power supply, after that electronic current flow.

Wilson said: (Aug 4, 2013)  
Guys its just simple listen. Assume a simple circuit with a battery connected to a small bulb (load). As everyone know we connect +ve terminal to one side and the -ve to other side. We know that in a battery charge stored in cathode starts moving towards anode. So what we do is we connect battery +ve and and battery -ve with a wire btw the wire we have a load (bulb) the load utilises as much charge it wants and it glows.

The charge will be flowing from cathode to anode (since +v and -v attracts) meanwhile the load connected in between utilises the charge to glow. This is what happens when we explain the circuit. The charge (electron) flow here called conventional current (it is assumed just to explain the circuit). But actually current direction is from -ve to +ve because electron is -ve charge and its obvious it is attracted to +ve. So current always flows from -ve to positive.

Since the circuit analysis were made 100 years ago at that time scientist actually thought electricity was some kind of invisible fluid which flows of higher region to lower region just like water (so they gave higher region as +ve and lower region as -ve) but later it was discovered that electrons flows from -ve to +ve. So finally the thing is current direction is -ve to +v but while analysing circuit we say its +v to -v and hence the conventional current. I hope everyone are clear now.

Manu D M said: (Aug 24, 2013)  
Conventional Current direction is always Opposite direction of actual electrons flow i.e. in the direction of flow of Protons. So I thought my answer is "Protons move in conventional current flow".

Komal said: (Aug 26, 2013)  
How is the conventional current came first?

Explain please.

Mounika said: (Nov 6, 2013)  
Conventional current is also the current which flows even if you don't connect battery (a very little small amount).

Nithyasree said: (Apr 30, 2014)  
Generally, current is a flow of electrons. Then how the flow of protons is considered as a conventional current. Please explain.

Yehyah said: (May 29, 2014)  
Please explain what is difference between conventional current and electron current ?

Devashish said: (May 30, 2014)  
Is it relate to the difference b/w electricity and current?

Amritanshu Pandey From Govt.Poly. Bahraich(U.P.) said: (Jul 27, 2014)  
A flow of positive charge gives the same electric current as an opposite flow of negative charge. Thus, opposite flows of opposite charges contribute to a single electric current. For this reason, the polarity of the flowing charges can usually be ignored during measurements. All the flowing charges are assumed to have positive polarity, and this flow is called Conventional current.

In solid metals such as wires, the positive charge carriers are immobile, and only the negatively charged electrons flow. Because the electron carries negative charge, the electron motion in a metal is in the direction opposite to that of conventional (or electric) current. In many other conductive materials, the electric current is due to the flow of both positively and negatively charged particles at the same time. In still others, the current is entirely due to positive charge flow. For example, the electric currents in electrolytes are flows of electrically charged atoms(ions) , which exist in both positive and negative varieties. In a common lead-acid electrochemical cell, electric currents are composed of positive hydrogen ions(protons) flowing in one direction, and negative sulfate ions flowing in the other.

Electric currents in sparks or plasma are flows of electrons as well as positive and negative ions. In ice and in certain solid Electrolytes, the electric current is entirely composed of flowing protons. For conceptual simplicity, Conventional current is used to conceal these issues by summing the various currents together into a single value.

There are also materials where the electric current is due to the flow of electrons, and yet it is conceptually easier to think of the current as due to the flow of positive "holes" (the spots that should have an electron to make the conductor neutral). This is the case in a p-type semiconductor.

Pavan said: (Aug 6, 2014)  
Protons can't flow out of the atoms but in the conventional current flow in case of the semiconductors the holes (vacant spaces created by the electrons) which are assumed to be positive flow in the direction of the conventional current.

Sangavay said: (Sep 8, 2014)  
Why should not be option b? I think it is also correct.

Engnr Samreen said: (Jan 21, 2015)  
Conventional current means flow of positive charges (protons). So the answer should be B.

Priya said: (Jan 21, 2015)  
Please give a short&sweet answer.

Vinil Visanth said: (Mar 17, 2015)  
Conventional current flows in a direction opposite to that of electron flow.

Electron flows from negative to positive. Protons never flows.

In case of semiconductors holes flows in the same direction of conventional current flow.

Armandwish said: (Sep 4, 2015)  
I think conventional current flow means the current flow process in a conductor (no band gap not require external energy, so its faster) and vice-versa.

Payel said: (Feb 11, 2016)  
Mass is inversely proportional to the speed. Mass of a proton is 1836 times of an electron mass. So the speed of electron > speed of proton. Electron current come first than conventional current (i.e Current for proton).

Rajesh said: (May 8, 2016)  
Without the flow of electron how "current" comes?

Current itself means the flow of charge.

Priti said: (Jun 1, 2016)  
In the question, they mentioned the discovery of the current flow.

So the conventional flow of electrons was assumed by the scientist first and then they were proved wrong and then they realized that current actually flows in the electron flow pattern.

Syed said: (Sep 8, 2016)  
To find the conventional current flow, first you must go to electric current defination in one word " the flow of electrons or charge" is called an electric current.

That's why conventional current flow first.

Heera said: (Jan 3, 2018)  
Electron flow-ve to +ve and conventional current flow +ve to - ve terminal.

Mimi said: (Feb 14, 2018)  
I think the answer is B.

Bizon said: (Aug 2, 2018)  
Convetional flow follows the flow of positive charge source. While the electron flow is the real movement of electrons, which is negative.

Syamala said: (Nov 8, 2018)  
According to the law of conservation of energy.

Energy always flows from higher to lower so in electrical circuit current is shown from positive terminal of the source to the negative terminal which is called as conventional current.

But actually, in circuits ELECTRONS are moving from negative terminal to positive terminal which is called electron current.

We can agree with that they might find conventional current first in history so it can be the answer.

Abar-4744 said: (Oct 15, 2019)  
Conventional: Proton will have excess +ve charge, so charges will flow from +ve to -ve.

Electron flow: Electron will have excess -ve electron so, -ve charges will flow from -ve to +ve.

Both concepts are about current flow but in the different or opposite directions.

I think the scientist found the conventional current flow, that's why ANSWER is conventional current came first.

Chandini K P said: (Nov 27, 2019)  
What is the difference between conventional current and electron current ?

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