The potential difference is calculated, the potential of D is 5V, the potential of A is 12V, and D A

The --- potential difference is the difference in potential between two points (the difference is the result of subtracting two values), similar to calculating the height difference between two points.

- If the height of the horizontal plane is specified as zero, the height of 5 meters below the water level (point A) is -5 meters, and the height of 10 meters below the water level (point B) is -10 meters, then the height difference between the two points of AB is -5-(-10) = 5 meters, and this positive 5 meters means that point A is 5 meters higher than the height of point B. How to calculate the height difference between BA, -10-(-5) = -5 meters, and the minus sign indicates that the height of point B is shorter than that of point A. Assuming that the height of point C is 10 meters and the height of point D is 5 meters, then the height difference between the two points of CD is 10-5=5 meters, and this positive 5 meters means that the height of point C is higher than the height of point D.

How to calculate the height difference between DC, 5-10 = -5 meters, and the minus sign indicates that the height of D is shorter than that of point C.

-So what is the potential difference between DA, which is the potential of D minus the potential of A, which is -5V-(-12V)=7V, which means that the potential of D is higher than that of A, just like when calculating the height difference above, point A is higher than B.

- To know who subtracted whom, and to know that the positive and negative results of the calculation are used to indicate which point is higher and which point is shorter.

Negative five and negative twelve, is there a difference of seven?

Summary. A point in the optional circuit is the reference point, and its potential is zero; Indicate and calculate the current reference direction; The voltage between each point and the reference point is calculated as the potential of each point.

Hello dear.

Ren Zhiyu chooses a certain point in the circuit as the reference point, and sets its potential to zero; Plot the reference direction of each current and calculate the opening hand; The voltage between each point and the reference point is calculated as the potential of each point.

Relationship between potential and voltageThe voltage between the two points is equal to the difference between the two potentials um=v. -v, the unit of potential is in phase 3 with the unit of voltagePotential Positive and Negative Positive Values Meaning Positive Values:

Look, dear. u1=-10

Anything else.

As shown in the figure, the power supply E2=12V positive electrode is grounded by R2, and E1=5V positive electrode is directly grounded. Since the positive pole of diode D is connected to the negative pole of the power supply E2, the voltage of E2 is higher than that of E1, so diode D is in the cut-off state and there is no current.

As shown in the figure, there is no current in the circuit, and there is no voltage division in all resistors, so the potential of point D is the voltage of the power supply E1, because the positive electrode is grounded, the potential of point D is -5V, the same principle: the potential of point A is -12V, and D-A = 7V.

Voltage, also known as potential difference or potential difference, is a physical quantity that measures the difference in energy between a unit charge in an electrostatic field due to different potentials.

The voltage of an electrical appliance is 2V, which means that the potential difference between the two ends of an electrical appliance is 2V and the rated voltage, which is the voltage when the electrical appliance is working normally.

The rated voltage is the optimal voltage applicable to the appliance when it is working for a long time. It is easy to burn out if it is high, and it does not work properly if it is low (the bulb does not shine normally, and the motor does not work normally). At this time, the components in the electrical appliances are working in the best state, and only when they are working in the best state, the performance of the electrical appliances is relatively stable, so that the life of the electrical appliances can be extended.

The difference between the potentials of any two points in a circuit The potential difference. Voltage is what drives the directional movement of the charge to form an electric current. The reason why the current is able to flow in the wire is also because of the difference between high and low potential in the current.

This difference is called the potential difference, also known as the voltage. In other words. In a circuit, the potential difference between any two points is called the voltage at those two points.

The potential difference between what 2v is and what it is:

The potential difference between the positive and negative electrodes.

The potential difference between one electrode and the other.

The electrical voltage is 2V, which means that it can work normally at 2V.

Find the loop current i first

r1+r2+r3+r4)*i+us2+us3-us1=0 to get i=1a

The potential is the voltage of that point to the reference point, so there is.

vm=us2+ur3=6+1*

vn=0vvl= -us1+ur2+us2+ur3= -30+1*2+6+1*find voltage:

uab=ur2+us2=2+6=8v

ubc=ur3+us3=

uda=ur1 - us1=

The only current flowing on the <> circuit is shown in red, and the current inflow resistor produces a voltage difference at both ends of the circuit with a voltage difference polarity of incoming + outgoing, so the voltage at the end of the current source = 2 terminal voltage + 3 terminal voltage = (2x2) + (3x2) = 10v, and the polarity is left-right +, or -10v left + right-.

each of the circuits.

Points all have a certain potential, just as every part of space has a certain height. In order to illustrate the height of the starvation trace, there must be a starting point for calculating the height, (i.e., the reference point) of the state. For example, if a building has 5 floors, the number of floors actually refers to the number of floors from the ground, but if we change the reference point and include the basement of the building, then the number of floors of the building is 6 floors.

Potential: Electric field force.

Put the unit positive charge.

It's a two-point voltage.

The voltage between the two points = the potential of point A - the potential of point B, i.e., UAB = A-B satisfaction.

The diagram is not very clear, but the general meaning is known.

The process of solving the problem is as follows:

Loop current i = total voltage of the loop Total resistance of the loop = (30-12-6) (Then calculate the voltage drop of each resistor v1=, v2=2v, v3=, v4=7v Starting from the grounding point n, the potential of each point: un=0v, uc=-12v, ud=-19v, ul=, ua=, um=, ub=.)

The voltage is just fine: vab=ua-ub=8v, vbc=ub-uc=, vda=ud-ua=