The direction of the current in the steady circuit is 80

In a steady circuit, the direction of the current in the external circuit is from high potential to low potential; The direction of the current in the internal circuit is from low to high potential; If there is a potential difference, a current can be formed, and if there is no potential difference, the current cannot be formed, so there is no current in the equipotential circuit of the combined power supply, and the current direction is impossible to talk about

To put it simply, in a steady circuit, the direction of the current in the outer circuit is from high potential to low potential; The direction of the current in the internal circuit is from low to high potential; If there is a potential difference, a current can be formed, and if there is no potential difference, the current cannot be formed, so there is no current in the equipotential circuit of the combined power supply, and the current direction is impossible to talk about~~

In a constant current circuit, the current outside the constant current source flows from high to low potential, and from low to high potential internally. The constant current source is a convenient abstraction for analyzing the circuit. In a combined power supply, current flows from a high potential point to a low potential point.

Keep in mind that any circuit outside of a steady circuit (i.e., outside the power supply) will generate a current that goes from a high potential to a low potential if there is a potential difference between the two points: the inner circuit, which is inside the power supply, is in exactly the opposite direction.

By definition, the direction in which a positive charge flows is the direction of the current, or the positive electrode flows to the negative electrode (electrons flow from negative to positive), and the direction of the current in a circuit is from high potential to low potential.

On the outside is high to low, inside from low to high, what do you mean by combined power supply?

Let's go into more detail. I don't understand what you mean.

Summary. The direction of the constant current source is the same as the direction of the electromotive force of the voltage source.

The direction of electromotive force is directed from the negative pole to the positive pole, the direction of the electromotive force and the direction of voltage in the internal circuit are opposite, and the direction of electromotive force and current are the same.

The direction of current, electromotive force and voltage is divided into set direction and actual direction, and the set direction and the actual direction are the same as the positive value.

Hope mine can be helpful to you.

The direction of the electromotive force in the direction of the constant current source and the direction of the voltage source.

The direction of the constant current source is the same as the direction of the electromotive force of the voltage source.

The direction of electromotive force is directed from the negative pole to the positive pole, the direction of the electromotive force and the direction of voltage in the internal circuit are opposite, and the direction of electromotive force and current are the same.

The direction of current, electromotive force and voltage is divided into set direction and actual direction, and the set direction and the actual direction are the same as the positive value.

Hope mine can be helpful to you.

DC power supply principle: The electric field generated by the positive charge alone cannot maintain a constant current, but with the help of DC power supply, a non-electrostatic action can be used (so that the positive charge returns to the positive electrode with a higher potential difference from the negative electrode with a lower potential difference through the switching power supply, so as to maintain a two-level potential difference, and then generate a constant current. A DC power supply is a device that maintains a constant voltage and current in a circuit.

The non-electrostatic force in a DC power supply is deflected from the negative to the positive. When the DC power supply is connected to the external circuit, the current flowing from the positive electrode to the negative electrode will be generated outside the switching power supply (external circuit) due to the impetus of the electric field force. In a switching power supply (internal circuit), the action of the non-electrostatic force causes the current to flow from the negative electrode to the positive electrode, which in turn causes the flow of the positive charge to produce a closed circulation system.

One of the characteristics of the switching power supply itself is the electromotive force of the switching power supply, which is equivalent to the work done by the non-electrostatic force when the positive power of the enterprise moves from the negative electrode to the positive electrode according to the switching power supply. When the internal resistance of the switching power supply is negligible, the electromotive force of the switching power supply can be felt to be numerically similar to the potential difference or working voltage on both sides of the switching power supply.

Stability of current such as condition 1. Current intensity Current density vector 1Current: The charged particles in a conductor that can undergo directional motion under the action of an electric field force are called carriers.

Carriers: electrons, positive and negative ions, holes. The directional motion of the carriers in the conductor forms the current.

The flutter plexus current caused by the movement of a negative charge is equivalent to the current caused by the movement of an equal amount of positive charge in the opposite direction. The direction of motion of the positive charge is defined as the direction of the current. Department of Physics, Taiyuan University of Technology Current formation conditions in conductors:

1) There is an electric charge in the conductor that can move freely; (2) The conductor should maintain an electric eggplant and cherry blossom field.

The working principle of the constant current source circuit.

The constant current source refers to the circuit whose output current does not change with the circuit voltage, load, and ambient temperature, so theoretically the ideal constant current source should have infinite internal resistance.

As shown in the figure, the output current of the constant current source is determined by the variable resistance RVI, we know that the current of the collector is determined by the base current when the transistor works in the amplification area, that is: IC= IB R1 is connected in series with the diode to provide a stable bias voltage to the base, and the emitter resistance RVI can adjust the current on the one hand, and has a negative feedback effect on the other hand, so that the output current is more stable.

This is a regulated power supply with an output of 5V.

The main one here is the rectifier bridge three-terminal regulator, and the rest is nothing.

The magnitude and direction of the current intensity at each point in the current field do not change with time. For the steady current circuit, although there is the loss of electric heat and magnetic energy, that is, there is the problem of energy conversion, but because the steady power supply, conductor and charge carrier that constitute the steady current circuit constitute the same system, the interaction force between them belongs to the internal force, and such a system is not affected by other external forces, therefore, the conditions required by the law of conservation of momentum are met, so that the momentum of the steady current is conserved.

A constant current that exists inside a conductor and does not change in magnitude with time is called a constant current.

A circuit with a constant current must be closed - the current through any enclosed surface is zero.

The equilibrium current is based on the assumption that the electric field strength inside the entire wire is equal and the direction is the same, so a steady current is generated. In reality, the balance current does not exist at all, it is just a simplified model.

It is also important to remember that there is no electric field inside an ideal conductor.

The side perpendicular to the magnetic field is subjected to two forces: the vertical upward ampere force f=iab, and the resulting counterclockwise moment m1=iaba; The clockwise moment m2 = mga produced by the vertical downward gravity mg, and the other two edges equal to the magnetic field are not subject to the ampere force, but by the vertical downward gravity 2mg, the resulting moment is clockwise m3 = 2 mg a 2 = mga (its center of gravity is at the midpoint and the distance from the axis of rotation is a 2).

m1=m2+m3

iaba=mga+mga

So b = 2 mg ai

This topic is about the balance of moments. The new curriculum standard area does not require learning. If you're in an area that doesn't require you to learn the balance of moments, don't delve into it. It is enough to know.

The answer is correct, it is 2mg AI.

Only the edges of the wireframe parallel to the axis are subjected to ampere force, and the direction is vertically upward, and the magnitude is f=bia

The gravity on all three sides of the wire frame is mg, and the balance according to the moment is: fa=mga+2mga 2

Simultaneous and two-formula can be solved: b=2mg ai

Ontology, you may think of the force arms of the gravity of the three sides as A, but in fact, the arms of the gravity of the two sides perpendicular to the axis are A 2.