How to connect parallel circuits to find the junction points in parallel circuits?

First of all, you should be familiar with parallel circuits.

so that the points of division and junction in the circuit can be determined. The connection method of the parallel circuit is that the head is connected to each other, and the tail is connected, just like the left hand of two people is connected together, the right hand is connected together, and then connected with the circuit, which is the parallel circuit; The point of junction is the junction of the hands. If two people connect the left hand to the other person's right hand, this is called end-to-end connection, one person's empty left hand is connected to one end of the circuit, and the other person's empty right hand is connected to the other end of the circuit, it is called a series circuit.

A parallel circuit can be understood as a number of wire ends concentrated on a binding post, and then the wire ends at the other end are concentrated on another binding post, which is a parallel circuit. And the binding post is its junction point.

In the parallel circuit, start from the positive pole of the power supply to see how the current flows, the point where the current branches is the equinox, and the point where it is gathered together is the junction point.

In parallel circuits, the best way to find the junction of parallel circuits is to see whether a certain point is the node of two branches of the current.

For example, the parallel connection method of two bulbs: the beginning of the two bulbs is connected together and then one end of the power supply is connected; The ends of the two bulbs are connected together and then connected to the other end of the power supply.

The fields of each branch of the parallel circuit are between the two poles of the power supply, and the two poles of the power supply are the junction points of each branch of the parallel circuit.

Then there are only the connection points in the circuit, which is the "point" ...... of the circuit diagram

The first thing to consider when it comes to 'parallel' is generally 'node'. The node is the common contact of each line in the circuit, and there are no less than three branches at the same node, which means that there must be at least three connecting lines at the same point!

Then, on this basis, divide in the same way, and you can quickly find each loop. If it is a circuit with power supply, you can directly find the parallel circuit with the help of the power supply end of the power supply.

Civil lighting bulbs are connected in parallel to the rated voltage of 220V.

, so each bulb is subjected to a voltage of 220V, and the total current of the external circuit is the sum of the currents flowing through all the bulbs.

Your question is not clear, there are intersection points in parallel circuits, and if there are branch points in parallel circuits then this circuit is not called parallel circuits either.

You can think of it this way as you can think of as a terminal point where two wires share the same place. After you get familiar with the circuit, you can analyze the circuit independently. Actually, there's nothing complicated.

The physical diagram is connected according to the circuit diagram!

1) Understand circuit diagrams.

2) According to the circuit diagram, starting from the positive pole of the power supply, connect it in turn according to a branch, and return to the negative pole!

The right should be connected as a series circuit - do not consider another branch 3) and then according to the requirements of the circuit diagram, find the nodes at both ends of the other branch 4) and then connect the circuit elements of the next branch between the two nodes in turn when there are multiple branches, and so on!

It's not easy to make mistakes!

If you don't understand, ask again! Ask me anything!

First string and then merge, the first is connected, the tail is connected...

That's what our teachers said... First of all, the series of good marks on the beginning and the tail of the first and last of the first and the last of the tail...

Even the physical picture how to say that I still practice more Practice makes perfect... I just started out like you... qaq ahhh t t

I still don't understand the circuit diagram, the circuit diagram is the same as the physical diagram.

When looking at the equivalent circuit, you can shrink the node to one point, or pan over the wire to see what appliances or switches are next to the node.

In short, first sort out the relative position of the nodes in the equivalent circuit diagram and the electrical appliances and switches, and then connect the physical objects.

It is to connect a series circuit from the power supply on the basis of series connection. Take a look at the picture, you don't know how to send me a message! Hope it helps! ↖(

The head is connected, and the tail is connected. [+Even,--Even].

Parallel circuits. The point at which the circuit is divided into two from one is called a equinox. (The point where the current starts to slip from the trunk road and flows to the branch road).

The equinox is connected to the positive pole of the power supply.

The point at which the circuit is synthesized into one from two is called the point where the circuit is combined into one. (the point at which the current starts flowing from the branch to the trunk).

The junction is connected to the negative pole of the power supply.

1. Analyze the circuit diagram, find the equinox and junction points on the circuit and mark them.

2. Connect the battery pack (find out the positive pole of the power supply, start from the positive pole), 3. Connect the trunk components;

4. Branch connection: After finding the branch, connect the branch road until the junction point, and then draw another branch road (the master can directly connect the two branches, this method is easier to understand).

5. Check for omissions, short circuits, open circuits and errors.

Note: 1. When connecting, draw in order, starting from the "ten" pole of the power supply, directly to the "one" pole of the power supply, and the wire must be drawn to the terminal post (switch, ammeter, voltmeter, etc.).

2. When connecting the sliding rheostat, it must be drawn on and at once;

3. The voltmeter is connected in parallel, that is, the current flows in from the positive pole of the meter and flows out from the negative pole.

4. The ammeter is connected in series, so be careful not to short circuit. It is also the current flowing in from the positive pole of the meter and out from the negative pole.

5. In case of multiple branch connections, at this time, pay attention to the connection of one loop and one loop in turn, do not connect one circuit is not connected, just connect the other circuit, so it is easy to have problems.

6. Check whether the circuit is consistent with the circuit diagram, and whether there are omissions, short circuits, open circuits and errors.

7. The wires cannot be crossed.

1) Current shunt method.

The main point of this method is to start from the positive pole of the power supply and follow the direction of the current until you reach the negative pole of the power supply. No matter how the circuit is bent, as long as the current is not divided, that is, the current flows from one electrical appliance to another electrical appliance and flows all the way, then the electrical appliance is connected in series, and the composition is a series circuit.

If the circuit splits at one point, indicating that there are both trunks and branches in the circuit, then the current will converge at another point after passing through the consumer on the branch, and will return to the negative pole of the power supply. When there are no electrical appliances on the main road, and only one electrical appliance is used on each branch road, these appliances form a parallel circuit.

2) Node method.

For those with strings. For students with preliminary knowledge of parallel circuits, it is easy to see the connection method of electrical appliances from the standardized circuits. But when faced with an unregulated circuit, especially when the wires in the circuit are cross-connected in multiple places, beginners tend to be confused.

The "nodal method" can be used to identify such circuits. Nodes are those points in a circuit where the wires are "cross-connected", including shunt and bus.

The specific steps to identify a circuit using the nodal method are:

a.Identify all the nodes in the circuit and represent them with letters (or numbers).

b.All nodes that are directly connected by a single wire (without passing through the consumer) are considered to be the same node. and use the same letter (or number) instead.

After the above two steps, it is not difficult to see from Figure 06-2 that the two ends of lamps L1, L2 and L3 are connected to point A of the circuit at one end and point D (B) of the circuit at the other end, so the lamps L1, L2 and L3 are connected in parallel.

4.Connect the circuit.

Connecting the real thing according to the circuit diagram is an electrical experimental skill that students should have. There are three ways to connect circuits.

1) Current flow method.

Starting from the positive terminal of the power supply, the physical object is connected in sequence along the direction of the current flow until the negative terminal of the power supply. This method is quick and accurate when connecting series circuits.

2) Branch road first and then trunk road method.

As the name suggests, this is a common method used to connect parallel circuits. The process is as follows: first find out the shunt points and busbar points of the circuit from the circuit diagram, and regard them as the "head" and "tail" of each branch; The components on each branch are connected according to the direction of current inflow, and the current inflow end is the "head" of the branch, and the current outflow end is the "tail" of the branch, and the "head" of each branch is connected, and the "tail tail" is connected; Then connect the components on the trunk road between the shunt point and the busbar point in the order in the circuit diagram; Finally, the "head" and "tail" of each branch road are connected to the shunt point and the catchment point respectively.

3) Pass first and then make up the method.

Starting from the positive pole of the power supply, along the flow direction of the current, the components in the trunk circuit and the components of a certain branch are connected with wires, and a current path is formed first, and the position of the shunt point and the busbar point is found; The components in the other branches are then connected and connected between the shunt and the busbar to form the path of all currents. I hope you get something!

How to draw a parallel circuit diagram in the third year of physics.

Let me give you two examples (the above is the physical diagram, and the following is the circuit diagram).

It's so simple hahaha

Drawing circuit diagram questions can be roughly divided into the following types:

1. Look at the real thing and draw the circuit diagram.

2. Look at the diagram and make a drawing of the components.

3. Design the circuit according to the requirements.

4. Identify the wrong circuit and draw the correct diagram. In general, the above four types of graphs are used, and their plotting methods are described in detail below.

Look at the real thing to draw the circuit diagram, the key is to look at the diagram, the diagram can not be understood, you can not make a good diagram, there is an internal regulation in the high school entrance examination, mixed diagram is not required, then you should understand in your heart that the physical diagram actually has only two circuits, one in series, the other is in parallel, the series circuit is very easy to identify, first find the positive pole of the power supply, and use the tip of the pencil to advance in order in the direction of the current until the negative pole of the power supply.

Clarify the location of each component, and then plot it. The order is: draw the battery pack first, according to the order of the components to make a specification drawing, horizontal and vertical, there shall be no components at the turn, if there is a voltmeter, it is necessary to accurately judge which can measure the voltage of a circuit, in the case of checking the circuit is correct, the voltmeter and at both ends of the circuit under test.

It is the least error-prone method to connect one of the branches first, and then connect the other branch, in turn.

Walk the circuit in the direction of the current.

In parallel circuits, one circuit is connected first, then the other is merged, and finally it is checked again.

Draw your own circuit diagram of an equivalent circuit.