The characteristics of the current and voltage on the hybrid circuit are detailed in detail

1) Trunk roads are like rivers, and branch roads are like tributaries. The water flowing through the tributaries adds up to the water flowing through the river, so the sum of the branch currents is equal to the main circuit current.

2) First of all, the small group of R1 and R2 in parallel is regarded as a resistor (equivalent resistance, so that in general, it becomes a series circuit between this small group and R3).

You know, a series circuit has a positive ratio to voltage, that is, the voltage is proportional to the resistance. Of course, you also need to calculate the total resistance of this small group (1 r=1 r1 + 1 r2, I don't know if you have learned it), and finally, the positive ratio pressure law u1 r=u2 r3

3) In fact, the positive and negative ratio voltage is caused by the equality of current in series circuits and Ohm's law.

Push it out.

Dry circuit current r3 current.

Branch current 1 2R3 current (when R1 and R2 resistance values are the same) Total resistance value: r R1 R2 (R1 R2) R3 Trunk current: i u r

The current of the series circuit is equal everywhere, so: the trunk current R3 current.

Branch current (when R1 and R2 are the same):

i1＝i2＝i－i2

If r1 r2, r3 1 2r1:

R3 voltage at both ends 1 2 power supply voltage.

R1, R2 voltage 1 2 power supply voltage.

R3 voltage at both ends:

u＝i×r3

Voltage at both ends of R1 and R2 in parallel:

u＝i×[r1×r2/(r1＋r2)]

Trunk current = sum of branch currents i=i1+i2. Here the resistance r3 is in the trunk circuit, i3=i. So i3 = i1 + i2.

Each parallel circuit has an equal voltage, i.e., u1=u2.

Total voltage u=u1+u3 or u=u1+u3.

Obviously, the total current flowing through R1 and R2 is equal to the current flowing through R3, i.e. the trunk current is equal to the sum of the currents of the branches.

The voltage of R1 is equal to that of R2, and the voltage of R3 is equal to the current passing through it multiplied by its resistance.

R1 and R2 are connected in parallel, then the voltage of R1 and R2 is the same, but the current is not necessarily the same, in series with R3, then I1+I2=I3, that is, the sum of the currents of R1 and R2 is equal to the current of R3.

Series circuit i=i1=i2 u=u1+u2

Parallel circuit u=u1+u2 i=i1+i2

Series and parallel connection of partial pressure shunt.

There is no formula for how to calculate the power, current, and voltage of the hybrid circuit, in fact, it is the same as the ordinary one, first regard the parallel part as a whole, treat the circuit as a series, solve the value first, and calculate the parallel part.

The power can be divided into the power of each component, or the total power, but this simple point, the total power can be obtained by adding each power directly.

Overview of hybridization. There are series and parallel connections in the circuit, which is called a mixed circuit.

The advantage of hybrid circuits: it is possible to make a single electrical appliance work or not. Disadvantages of hybrid circuits: If one of the appliances on the main circuit is damaged or open, the entire circuit will be invalidated.

The analysis method of hybrid circuit is as follows:

Firstly, the connection method of each part of the circuit is clarified, and then the influence of the change of local circuit resistance on the total resistance of the circuit is analyzed, and then the change of the total current of the circuit is analyzed, the change of the voltage of each part is analyzed by the change of the total current, and the current change on the local circuit is analyzed by the change of the voltage of each part.

When analyzing the total resistance variation, pay attention to:

1) Resistance series: one of them becomes larger, and the total resistance of the series circuit becomes larger; One of them becomes smaller, and so does the total resistance.

2) Resistance parallel: one of them becomes larger, and the total resistance of the parallel circuit becomes larger; One of them becomes smaller, and so does the total resistance.

Analysis and calculation of hybrid circuits:

a) Node method.

This method is the most effective and most used method for simplifying hybrid resistor circuits. It employs four steps:

1 Determine which resistance between the two ends is calculated.

2 Identify the independent nodes (nodes: the connection points of three or more branches) in the circuit. If there are two points in a circuit that are directly connected by wires, they should be treated as the same point (i.e., equipotential point).

3. Arrange the nodes and two ends vertically (or horizontally). The two endpoints are on the outermost layer.

4 Resistors that connect nodes, endpoints, and endpoints. When connecting resistors between two nodes, between two endpoints, and between nodes and endpoints, they cannot pass through other nodes or endpoints.

(2) Equilibrium bridge equivalence method.

This method is one of the most effective ways to simplify bridges with balanced electrical appliances. It uses the principle that when the bridge circuit is balanced, the bridge branch can be regarded as an open circuit or a short circuit to realize the equivalent conversion of the original hybrid resistor circuit to a series and parallel resistor circuit.

Hello, I'm here to help you, I hope I can help you, thank you.

Series circuits. Parallel circuits.

Current. Peculiarity.

The current is equal everywhere in a series circuit.

i＝i1=i2=……

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

i＝i1i2

2. The current in each branch is inversely proportional to the resistance of each branch.

i1:i1=r2:r1

Voltage. Peculiarity.

1. 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.

u＝u1u2

2. The voltage at both ends of each section of the circuit is proportional to the resistance of each section of the circuit.

u1:u2=r1:r2

The voltages at both ends of each branch of the parallel circuit are equal.

u＝u1=u2=……

Electrical power characteristics.

1. The total power of the series circuit is equal to the sum of the power of each section of the circuit.

2. The electrical power of each section of the circuit is proportional to the resistance of each section of the circuit.

p1:p2=r1:r2

1. The total power of the parallel circuit is equal to the sum of the power of each branch.

2. The electrical power of each branch is inversely proportional to the resistance of each branch.

p1:p2=r2:r1

Parallel: The voltage at both ends of each branch is equal and equal to the total voltage (supply voltage).

The sum of the currents of each branch is equal to the total current (trunk current).

Total Resistance:

r＝r2×r3/(r2＋r3)＋r1＝20×30/(20＋30)＋20＝32(ω)

Current through R1:

i＝u/r＝24/32＝

Voltage across R1:

u＝ri＝20×

Current through R2:

i＝u/r＝(24－15)/20＝

Current through R3:

i＝u/r＝(24－15)/30＝

The total resistance is not 30 ohms, but r1 + r2 r3 = 20 + 12 = 32 ohms.

The currents of R1, R2, and R3 are i1, i2, i3, i1=24, 32=, respectively

i2r2=i3r3，i2+i3=i1

Solve the two equations to obtain i2 and i3

1.Total resistance r = r1 + 1 (1 r2 + 1 r3) = 32 ohms.

Current i1 = 24 32 = (a) R2 Current i2= Current of r3 =

first string and then merge; Although the voltage of the parallel part is not equal to the power supply voltage, it still follows the characteristics of equal voltage everywhere and related parallel circuits.

The series connection part also follows the characteristics of equal currents everywhere and related series circuits.

In fact, the analysis is quite simple, always remember and abide by the following principles:

1. The voltage of the points directly connected by the wire must always be equal;

2. The current will not disappear and be generated out of thin air, and the incoming and outgoing must be equal, whether it is a point, a wire, or a device;

3. The voltage is like the height of the ladder, which is the sum of the voltage of each series device (the height of each ladder);

4. Ohm's law, voltage = current * resistance.

The above four seem to be very basic and simple, but the most complex hybrid circuit analysis in the world is analyzed by them.

Combined with the knowledge of string and equivalent resistance, I believe it will be like a fish in water.

The problem of multiple electrical appliances in series, first of all, ordinary electrical appliances are connected in parallel. If they are connected in series, their currents must be equal, and the voltages and voltages are equal, and if one is less, the others will definitely be more.

In the case of parallel connection, the currents do not affect each other, unless the line loss (wire resistance and voltage) is considered, and the voltage is equal.

The current is the same, and the voltage needs to be calculated using a formula.

Let me introduce an opportunistic method: "collusion and reversal"!

Use a pen to connect the element with varying resistance to the power supply.

If the resistance value becomes smaller (the voltage becomes smaller), the meters on the circuit (including voltmeters and ammeters) will become larger, and the meters that are not on the circuit will become smaller. The reverse method is the same as above.

This method is convenient for multiple-choice questions.

Firmly grasp that the current of the series circuit is equal, and the voltage of the parallel circuit is equal.

If a voltmeter is connected in series in a series current, it is considered an open circuit, because the resistance of the voltmeter is very large.

If a galvanometer is connected in parallel in a parallel circuit, it is regarded as a short circuit, and the resistance of the galvanometer is very small and easy to burn out.

You can think of the entire circuit as a highway, the electrical appliances as a toll booth, and its resistance as a toll standard, making it easy to remember and understand the formula.

In hybrid circuits, the current distribution is determined based on the characteristics of the circuit components and how they are connected. A hybrid circuit is when multiple electronic components or power supplies are connected in parallel to form a single circuit.

The current is distributed in a hybrid circuit according to Ohm's law, i.e. the current is distributed in the parallel branch according to the ratio of resistance or admittance. The exact distribution method depends on the type of components used in the circuit and how they are connected.

Here are a few common ways to distribute current in hybrid circuits:

Parallel resistance: If there are multiple parallel resistors in a hybrid circuit, the current will be distributed according to Ohm's law according to the reciprocal of the resistance value. A smaller resistor will absorb a larger current.

Shunt capacitors: In hybrid circuits, the current distribution is determined by the impedance of the capacitors. The impedance of a capacitor is inversely proportional to the frequency, so a capacitor with a lower impedance will absorb more current.

Parallel inductance: In a hybrid circuit, the current distribution is determined by the impedance of the inductor. The impedance of an inductor is proportional to the frequency, so an inductor with a higher impedance will absorb a larger current.

It should be noted that in hybrid circuits, the current distribution may also be affected by factors such as the internal resistance of the connected power supply and the interaction between components. Therefore, in the actual design and calculation of hybrid circuits, it is necessary to consider various factors comprehensively, and use basic circuit analysis methods to calculate and verify.