How to distinguish parallel connection from series connection 30

To put it in layman's terms, tandem is mainly understood"Skewers"To give a simple example, the current is like a river, a river only flows along one route, then the branch road can be regarded as a series, if the river flows along two branches, and then merges with one, then these two branches can be regarded as parallel...

1. The series connection is connected from end to end, and the parallel connection is equal connection.

2. The same current passes through A and then through B in turn, and Ganga A and B are connected in series.

One current passes through A, and the other current passes through B, and these two currents later flow to the same wire, and A and B are connected in parallel.

To use an analogy, parallel connection is when you go to a junction and have multiple forks, but they can all reach their destination, that is, they all go to the same destination. In series, it is you who go all the way to the dark, and you can't turn back if you hit the wall.

Very simply, if it is connected in series, only one point of the two parts of the circuit is directly connected, and if it is connected in parallel, there is a point directly connected at each end, if not, it is neither series nor parallel, note: if there is a branch at the connection point in the series judgment, it is not in series.

The current passing in parallel is the same voltage, and the current and voltage in series are not the same.

Count how many ways there are from the positive electrode of the power supply to the negative electrode, and more than one is parallel.

With the equivalent node method! Guaranteed you won't make a mistake! The specific method is too many words, you can ask your teacher to highlight it for you!

First, the voltage is different1. Series connection: The total voltage at both ends of the series circuit is equal to the sum of the voltages at both ends of each part of the circuit.

2. Parallel: The voltage at both ends of each branch of the parallel circuit is equal.

Second, the current is different1. Series connection: The current is equal everywhere in the series circuit.

2. Parallel: The current of the trunk circuit in the parallel circuit is equal to the sum of the currents of each branch.

Third, the resistance is different1. Series connection: The total resistance of the series circuit is equal to the sum of the resistance of each series conductor.

2. Parallel: The reciprocal of the total resistance of the parallel circuit is equal to the sum of the reciprocal of the resistance of each parallel conductor.

Quite simply, if it is connected in series, only one point of the two parts of the circuit is directly connected, and if it is connected in parallel, one point at each end is directly connected, if it is not, it is neither in series nor in parallel.

Note: If there are branches at the connected points in the concatenation judgment, it is not concatenation.

I divide it like this, the series circuit is a line that comes out of the positive pole of the power supply, and returns to the negative pole through electrical appliances; In the parallel circuit, after coming out of the positive pole of the power supply, it is divided into several branches, and then returns to the negative pole after passing through the electrical appliance.

Parallel and series connection of resistor series.

With the equivalent node method! Guaranteed you won't make a mistake! The specific method is too many words, you can ask your teacher to highlight it for you!

1.Definition of series and parallel circuits:

Series circuit: A circuit composed of connecting components one by one. Features are:

The current that flows through the first element also flows through all the elements in turn; The switch in the series circuit can control all the electrical appliances, if there is a disconnection, there is no current in the whole circuit, and none of the electrical appliances can work.

Parallel circuit: A circuit consisting of components connected in parallel. Features are:

The current of the trunk circuit is divided into multiple branches in the branches, and the current flowing from the power supply flows through each element in each branch respectively; In the parallel circuit, the current flowing into the electrical appliances of a certain branch will never flow into the electrical appliances of other branches, but can only flow into the main circuit; In the parallel circuit, the switch on the trunk road and the branch road are closed at the same time, and all the electrical appliances will work, the switches on the trunk road are disconnected, the switches on each branch road are closed, and the electrical appliances will not work, indicating that the switch on the trunk road can control the entire circuit, and the switch on the branch road can only control the branch.

2.Features of series and parallel circuits:

In a series circuit, since there is only one path of current, the current flowing from the positive terminal of the power supply will flow through each consumer one by one and finally back to the negative terminal of the power supply. Therefore, in the series circuit, if one of the electrical appliances is damaged or disconnected somewhere, the whole circuit will become an open circuit, the circuit will have no current, and all the electrical appliances will stop working, so in the series circuit, several electrical appliances are implicated in each other, either all of them or all of them stop working.

In a parallel circuit, the current flowing from the positive terminal of the power supply is divided into two branches at the branches, each with current flowing through it, so that even if one branch is disconnected, the other branch will still form a path with the trunk circuit. It can be seen that in a parallel circuit, the branches are not implicated with each other.

3.Common methods for identifying circuits in series and parallel.

Electrical connection method: analyze the connection method of electrical appliances in the circuit, and connect them in series one by one; Parallel between two points in a circuit is parallel.

Current analysis method: when identifying the circuit, the current: the positive pole of the power supply, the negative pole of the power supply, if there is no shunt on the way, it is a series circuit; If the current is diverted at a certain point, there is only one electrical appliance for each branch, which is a parallel circuit; If there is more than one electrical appliance in each branch, then the circuit is connected in series, which is called a hybrid circuit.

Disconnection method: remove any electrical appliance, if the other electrical appliance is not working, the two electrical appliances are connected in series; If the other consumer is not affected and still working, the two consumers are connected in parallel.

Node method: When identifying the circuit, no matter how long the wire is, as long as there is no electrical appliance or power supply in between, the two ends of the wire can be regarded as the same point, so as to find out the common point of each electrical appliance.

Observation structure method: the electrical terminal is numbered, the current inflow end is the "head" and the current outflow end is the "tail", and the electrical appliances are observed, if the "head and tail and the end of the tail" are connected in series; If the "head, head", "tail, tail" are connected, it is in parallel.

The meaning is different:

Series connection is one of the basic ways to connect circuit components, which means that circuit components (such as resistors, capacitors, inductors, electrical appliances, etc.) are connected one by one, and the circuit composed of series series of electrical appliances is called series circuit.

Parallel connection is a connection method between components, that is, two components and devices of the same or different classes are connected to each other, and the tail is also connected at the same time, which is usually used to refer to the connection of electronic components in the circuit, that is, parallel circuit.

Calculations are different:

In the series circuit, the current everywhere wants to wait; The total voltage at both ends of the series circuit is equal to the sum of the voltages at both ends of the circuit part; The total resistance of a series circuit is equal to the sum of the resistances of the various series conductors;

The reciprocal of the total resistance of the parallel circuit is equal to the sum of the reciprocal of the resistance of the parallel conductors; In a parallel circuit, the main circuit current is equal to the sum of the currents of each branch; The voltage at both ends of each branch of the parallel circuit is equal.

The law of parallel circuits

1. The voltage of each branch in the parallel circuit is equal and equal to the power supply voltage.

u=u1=u2

2. The dry circuit current (or total current) in the parallel circuit is equal to the sum of the currents of each branch.

i=i1+i2

3. The reciprocal of the total resistance in the parallel circuit is equal to the reciprocal sum of the resistance of each branch.

1 r=1 r1+1 r2 or written as: r=r1*r2 (r1+r2).

That is: 1 r=1 r1+1 r2+1 r3+....+1/rn

1.Definition: If the electrical appliances are connected one by one, they are connected in series. If the first head is connected, it is parallel.

2.Current method: If the current starts from the positive pole of the power supply, it is always a path, there is no shunt, and it belongs to series connection. If the current is divided and combined in the circuit, it is in parallel.

3.Removal method: Remove one of the electrical appliances in the circuit and identify the circuit according to whether there is current passing through other electrical appliances.

4.Comprehensive method: It is applied to circuits that are difficult to judge. Circuit analysis is an important foundation in the electrical knowledge of secondary school physics. When learning, it is necessary to grasp the basic characteristics of series circuits and parallel circuits, so as to better identify circuits.

Parallel and series connection of resistor series.

As long as one line is disconnected, the whole line will be broken, and parallel connection means that the whole line can still be energized normally when one place is disconnected.

Method 1: See if there is a branch. If there is only one line like a string of pearls, the string of electrical appliances is a series connection; If there is a forked branch, it is in parallel.

Method 2: See if they affect each other. If one of the appliances is broken, the others cannot work in series; On the contrary, if one of the appliances is broken, the others will not be affected, that is, in parallel.

For example, if the rice cooker at home is broken, it does not affect the role of the TV, it is connected in parallel.

A series connection is a path of current, and a parallel connection is a path of multiple currents.

On a line it is in series, and if there is a fork in the road, it is in parallel.

1. Tandem.

Definition: A circuit that connects components one after the other.

Features: One by one, end to end.

Current Path: There is only one current path in the circuit.

Switching function: control the whole circuit, at the same time control all the electrical appliances, the switch position changes the control function unchanged.

2. Parallel. Definition: A circuit in which components are connected side by side.

Features: Parallel connection, end to end.

Current paths: There are at least two current paths in a circuit.

Switching function: The main switch in the trunk circuit controls the entire circuit, and the switch in the branch only controls the branch.

Series Parallel connection.

Definition: A circuit that connects components one after the other. A circuit that connects components in parallel.

Features One by one, end to end, side by side, side by side, head to tail.

Current path There is only one current path in a circuit There are at least two current paths in a circuit.

The switch controls the entire circuit, and the main switch in the trunk circuit controls the entire circuit.

Function: Control all electrical appliances at the same time. That is, the switch in the branch only controls that branch.

The switch position changes, and the control function remains unchanged.

Node No Node There are nodes.

When the electrical appliances are working, they affect each other The electrical appliances in each branch work independently and do not affect each other.

I hope it helps you, and if you have any questions, you can ask them

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1. The connection method is different.

Series connection: The electrical appliances are connected in the circuit in turn, and the circuit has only one path, and any open circuit will appear open.

Parallel: There is more than one independent path between the circuit elements that constitute the parallel, the circuit has multiple paths, each circuit is independent of each other, one circuit element is open, and the other branches work as usual.

2. The characteristics are different.

Series connection: (1) There is only one path for the current.

2) The current of the series circuit is equal everywhere.

3) The total voltage of the series circuit is equal to the sum of the voltages everywhere.

4) The equivalent resistance of the series resistors is equal to the sum of the resistors.

Parallel: (1) The circuit has several paths.

2) The voltages are equal everywhere in parallel circuits;

3. The influence of the switch on the line.

Series connection: The switch controls the on/off of the entire circuit.

Parallel: The trunk switch controls all the electrical appliances, and the branch switch controls the electrical appliances of the branch where it is located.

4. The relationship between various electrical appliances in the circuit.

Tandem: The mutual influence of various electrical appliances.

Parallel: The electrical appliances have no influence on each other.

The organization in parallel in the circuit will reduce the number of tissues connected in series and increase.

What is the difference between series and parallel voltages?

There is only one loop in a series circuit.

Common methods for identifying circuits in series and parallel.

Current analysis method: when identifying the circuit, the current: the positive pole of the power supply, the negative pole of the power supply, if the electrical appliances are not shunted on the way, they are connected in series; If the current is diverted at a certain point, there is only one consumer for each branch, and these appliances are connected in parallel; If there is more than one electrical appliance per branch, then the circuit is connected in series, which is called a hybrid circuit.

Disconnection method: remove Ren Heng hollow meaning an electrical appliance, if the other electrical appliance is not working, then the two electrical appliances are connected in series; If the other consumer is not affected and still working, the two consumers are connected in parallel.

Node method: When identifying the circuit, no matter how long the wire is, as long as there is no electrical appliance or power supply in the meantime, the two ends of the wire can be regarded as the same point, so as to find out the common point of each electrical appliance.

Observation structure method: the electrical terminal is numbered, the current inflow end is the "head" and the current outflow end is the "tail", and the electrical appliances are observed, if the "head and tail and the end of the tail" are connected in series; If the "head, head", "tail, tail" are connected, it is in parallel.

Empirical method: For circuits that cannot actually be connected, such as street lights and home circuits, the connection can be judged according to some of their characteristics.

The difference between series and parallel connection is that current, voltage, and resistance are calculated differently.

1. The calculation of series and parallel currents is different.

The current is equal everywhere in a series circuit. In a parallel circuit, the main circuit current is equal to the sum of the currents of each branch;

2. The calculation of series and parallel voltage is different.

The total voltage at both ends of the series circuit is equal to the sum of the voltages at both ends of the circuit part; The voltage at both ends of each branch of the parallel circuit is equal.

3. The calculation of series and parallel resistance is different.

The total resistance of a series circuit is equal to the sum of the resistances of the various series conductors; The reciprocal of the total resistance of the parallel circuit is equal to the sum of the reciprocal of the resistance of the parallel conductors;