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Because the actual charge carriers are electrons, which carry negative charge.
So any positive charge is actually the absence of electrons where they're expected
to be, referred to as "holes", and conventional current is the flow of positive charge.
Answer
'Conventional current' is simply an assumed direction. It is NOT considered to be a 'flow of positive charge' -in fact, conventional flow direction is based on the mistaken assumption (by Benjamin Franklin and others) that current was a mysterious 'fluid' (not charge) that moved from a higher (positive) pressure to a lower (negative pressure). In other words, it was established long before 'positive charges' were discovered!!
'Holes', of course, don't exist. They're simply a 'model' used to explain the behaviour of semiconductors. As the original answer points out, holes are simply locations normally occupied by electrons. Relative to electron flow, holes 'move backwards' -in much the same way as the scenery appears to be moving backwards when you sit in a train -the scenery isn't moving backwards at all, of course, you are moving forward!
So in that sense, conventional current direction (not 'flow') and hole direction are the same.
What else can I help you with?
Do electrons travel in the same direction in a circuit?
In a circuit, electrons flow from the negative terminal to the positive terminal of the voltage source (such as a battery). This flow of electrons is opposite to the conventional current direction, which is from positive to negative. So, while electrons themselves move in one direction, the conventional current moves in the opposite direction.
Which direction does the conventional flow of energy move?
The term "conventional flow" is usually used specifically for electricity, not for any kind of energy. If the current consists of electrons, then, if the electrons move in one direction, the conventional flow (a ficticious flow of positive charge) flows in the opposite direction. If the electric flow consists of positive charges, then the conventional flow and the physical, or real, flow, are in the same direction. An electron current is the most common case, though.
How can positive charges cations in conventional current be equal to electronic current?
It IS NOT equal. The electron current represents something that really flows. The conventional current is a fictitious current that represents the flow of a POSITIVE charge (electrons have a negative charge), and flows in the opposite direction. Only the magnitude of the current is the same.
Difference between electron flow and conventional current?
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).
Are the conventional and electronic current the same?
No, conventional current is the flow of positive charge whereas current is actually the flow of negative electrons.
Are the direction of negative charges and conventional current in a conductor the same?
Conventional current is the effective direction of positive charge. When in a metal the negative charged electrons are moving in one direction, the conventional positive current is in the other direction.
The opposite direction of conventional current?
It doesn't always do so, but it does, in the case of an electron current."Conventional current" is, by definition, the equivalent of a flow of positive electric charge. So, if a current consists of positive carriers (e.g., holes, or positive ions), the conventional current flows in the same direction as the current carriers. On the other hand, if the current consists of negative carriers (like electrons - the most common carrier for electric current), the electrons flow in one direction, but the conventional (positive, fictitious you might say) current flows in the other direction.On a macroscopic scale, it is often useful to forget about the actual current carriers; for example, an electron current flowing to the left, and a current of positive ions flowing to the right, will have the same effect on a magnetic field.It doesn't always do so, but it does, in the case of an electron current."Conventional current" is, by definition, the equivalent of a flow of positive electric charge. So, if a current consists of positive carriers (e.g., holes, or positive ions), the conventional current flows in the same direction as the current carriers. On the other hand, if the current consists of negative carriers (like electrons - the most common carrier for electric current), the electrons flow in one direction, but the conventional (positive, fictitious you might say) current flows in the other direction.On a macroscopic scale, it is often useful to forget about the actual current carriers; for example, an electron current flowing to the left, and a current of positive ions flowing to the right, will have the same effect on a magnetic field.It doesn't always do so, but it does, in the case of an electron current."Conventional current" is, by definition, the equivalent of a flow of positive electric charge. So, if a current consists of positive carriers (e.g., holes, or positive ions), the conventional current flows in the same direction as the current carriers. On the other hand, if the current consists of negative carriers (like electrons - the most common carrier for electric current), the electrons flow in one direction, but the conventional (positive, fictitious you might say) current flows in the other direction.On a macroscopic scale, it is often useful to forget about the actual current carriers; for example, an electron current flowing to the left, and a current of positive ions flowing to the right, will have the same effect on a magnetic field.It doesn't always do so, but it does, in the case of an electron current."Conventional current" is, by definition, the equivalent of a flow of positive electric charge. So, if a current consists of positive carriers (e.g., holes, or positive ions), the conventional current flows in the same direction as the current carriers. On the other hand, if the current consists of negative carriers (like electrons - the most common carrier for electric current), the electrons flow in one direction, but the conventional (positive, fictitious you might say) current flows in the other direction.On a macroscopic scale, it is often useful to forget about the actual current carriers; for example, an electron current flowing to the left, and a current of positive ions flowing to the right, will have the same effect on a magnetic field.
Why direction of rotation is not reversed when both field and armature terminal are reversed?
The direction of the force that drives the machine is determined by the relative directions of the field and the armature current. By reversing the direction of both field and the armature current, the direction of the resulting force stays the same; you have to reverse the direction of one or the other; not both! Prove it for yourself, by applying Fleming's Left-Hand Rule (for conventional current flow); reverse the direction of both your first finger (field) and your second finger (armature current), and you thumb (direction of motion) will end up pointing in the same direction!
Why direction of rotation is not reversed when both field and armature terminals are reversed?
The direction of the force that drives the machine is determined by the relative directions of the field and the armature current. By reversing the direction of both field and the armature current, the direction of the resulting force stays the same; you have to reverse the direction of one or the other; not both! Prove it for yourself, by applying Fleming's Left-Hand Rule (for conventional current flow); reverse the direction of both your first finger (field) and your second finger (armature current), and you thumb (direction of motion) will end up pointing in the same direction!
What is a conventional current?
Conventional current shows current flow from + to - amp meters are labeled this way (conventional current flow) (hole flow) Physics shows that electrons are moving or flowing from - to + (electron flow) Tubes (deforest valves) sort of blew conventional current away semiconductors with different doping materials confuse it more so most new books relate to electron flow voltmeters ammeters are labeled the same since the 18th century
Why do you analyze electric circuit on the basis of the conventional current?
You can analyze it by either conventional or electron current, other than the sign they give the same answers. However it is convention to use conventional current, that is the way others will expect to see it done. That is also why it is called conventional current, it is the convention.
What is difference between positive current and negative current which current is used for generation of electricity?
Positive current flows from the positive terminal to the negative terminal, while negative current flows in the opposite direction. In electrical systems, positive current is used for generating electricity as it represents the flow of electrons from negative to positive, which is the direction of conventional current flow.
