Why is one point lower than the other?

If the potential can be a little lower than the potential, the potential is low, it means that the potential level is horizontal, and there are many points that are also at this special level.

What is Lenovo? What I want to say is that according to a certain reflection of the market, Lenovo, get the best income. Generally, the mainstream dragon stocks are often quickly pulled to the limit by the capital, and the masters often can't catch up.

Take today as an example: Unicom was suspended in the morning, Unicom Guomai opened with a 5% increase, and then quickly rose to the limit. That's the reason why little adds up.

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It's an opportunity.

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Low Level (VIL) refers to the maximum input low allowed when the input of the logic gate is low, and when the input level is lower than VIL, the input level is considered low. It is a low voltage as opposed to a high level, which is a term used in electronic engineering.

1. The high and low levels marked on the controller are brakes, and the high level is generally specified as more than 5V, and the low level is about 0V.

2. The voltage value on different circuits is not the same, if it is a digital circuit with 5V power supply, the high level is 5V, or close to 5V. Low is 'none', which is 0V or close to 0V.

3. The high level of the controller is on, and the low level is control.

One point lower than another is called low, why? Because it's low, it's called low.

The higher and lower levels are comparatively present.

When the reference point in the circuit changes, the potential of each point will also change, but the potential difference between the two points will not change.

In the current sensing and voltage sensing circuits using the negative end of the power supply, the current amplifier can be designed as a proportional amplifier at the inverting input terminal because the current and voltage detection require a common reference potential, such as a constant voltage and constant current power supply.

If the power supply is equivalent to a dam, the water in it is equivalent to the current, and the water storage height is equivalent to the voltage.

If there is a water facility downstream, at an altitude of x meters, below the height of the dam, then when the water level is higher than x meters, it is a high water level.

In the same way, high levels are like that.

Low potential is the opposite.

There is a height difference between the water level of the dam and the water facility, which is analogous to the electrical circuit, which is called the potential difference, and the larger the potential difference, the greater the current will be under the same load.

Electric potential, also known as electric potential, refers to the potential energy of a unit charge at a point in an electrostatic field [1]. The potential is the intensity of the electrical energy due to the potential.

element, its magnitude depends on the selection of the zero point of the electric potential, and its value has only relative significance. In general, infinity is chosen as the zero point of electric potential, in which case its value is equal to the ratio of the work done by the charge to move from there to infinity through an arbitrary path (the potential energy at infinity is artificially assumed to be zero) to the amount of charge. The commonly used symbol for electric potential is u or , and the unit in the International System of Units is volts (v) (abbreviated as volts, represented by v, which is an abbreviation for voltage).

When the unit positive charge passes through the phase interface of a substance phase a, because there is a surface potential at the phase interface of a, which is an indefinite value, the "absolute" potential at a certain position in a substance phase cannot be determined or measured, and what people can measure is only the potential difference between two different positions or the potential e in the same phase of matter. For example, a potentiometer or voltmeter measures the potential between its two terminal posts, both of which are brass phases of the same composition. In English, the concepts of potential and potential are used in the same word, potential, which is often confused when translated into Chinese.

In fact, when people encounter words such as "potential", "potential" or "voltage", they generally refer to "potential drop", that is, electric potential; The concept of "potential" is only useful in theory. In addition, in electronics, potential often refers to the voltage drop from a point to a reference point. Potential.

Among them, the reference point can be arbitrarily selected, but it is often selected at the common contact of the circuit, not necessarily the grounding point. However, the reference point is generally regarded as a zero potential point, which is convenient for potential calculation. One of the most important characteristics of potential is that it has zero potential.

The so-called zero potential point refers to the point where the potential is the same in the circuit. Its characteristics: the voltage difference between the zero potential points is equal to 0

If the equipotential points are connected with wires or resistors, no current passes through them, and the original working state of the circuit will not be affected.

This requires a reference potential, e.g., the ground is 0, and the rest is just a numbers game, 3 is greater than 1, 3v is the high potential, and 1v is the low potential.

Both high and low potentials are relative, with 300V and 200V being the former being high-potential; 5V vs. 1V, the former is a high potential; The front of 1V and -1V is also high.

The direction of the natural flow of energy, just like water always flows from high to low, we call the place where it flows out high, and the place where it flows in is called low, it's just a name, you can call it xx. The potential is used to direct the current on the surface of the water.

High potential: It is a high voltage as opposed to low potential, which is a term in electrical engineering.

In a digital logic circuit, a low level means 0 and a high level represents 1. Generally, the low level is 0 and the high level is.

There are also other possibilities, such as the voltage of the battery in the mobile device will decrease with the passage of time, if the minimum high level is specified, the use time of the device may be greatly reduced, and the specified high level voltage will be a little lower, and the minimum will be about or so.

1.Direct current: The positive voltage is high voltage, and the negative voltage is low voltage.

AC: The live wire is a high voltage, and the ground wire is a low voltage.

The potential reference point in a definite closed loop DU is different, and the potential of each point is also different, but the voltage between any two points of DAO is not invariable, which is a property.

The quality is called the relativity of the potential and the absoluteness of the voltage.

Let the potential of the reference point be zero. If the potential of a certain point is positive, it means that the potential of that point is higher than that of the reference point; A point with a negative potential indicates that the point potential is lower than the reference point. Corollary: The voltage between each point and the reference point is the potential of each point.

Voltage vs. Potential:

1. The voltage between each point and the reference point is the potential of each point;

2. The voltage is the potential difference;

3. The voltage direction is generally directed from the high potential point to the low potential point;

4. The potential is related to the choice of the reference point, while the voltage is not related to the choice of the reference point.

Generally speaking, the more positive charges an object has, the higher the potential; The more negatively charged, the lower the potential. If we connect two charged bodies with different potentials with wires, the positive charge of the charged body with high potential will flow to the potential, and the lower one will flow to the charged body, and the current will be generated in the wire, as shown in the figure: in other words, to produce current in the circuit, there must be a certain potential difference between the two ends of the circuit, which is the cause of the current.

The potential difference between any two points in a circuit is called the voltage of those two points.

It must be pointed out that there is a difference between potential and voltage, the value of potential is a relative concept, and the potential must be used as a reference point as zero potential (in electronic equipment, the grounding of the case is zero potential), if the zero potential is not determined as a reference point and it is meaningless to talk about the potential of a certain point in isolation, because the reference point is different, the potential size of the same point is not the same.

For example, if two batteries are connected as shown in Figure A, the potential at point B is zero, the potential at point A is -3V, and the potential at point C is +6V. If the two batteries are connected as shown in Figure B, then the potential at point A becomes zero, the voltage at point B becomes +3V, and the potential at point C becomes +9V. This shows that the reference point of the ground is different, and the potential of each point also changes, so the potential is relative.

The number of voltage is an absolute concept, and the voltage is always for two points, if the voltage of a certain point is isolated to be wrong, because the potential difference between two points of the voltage has nothing to do with the zero potential reference point selected in the circuit. As shown in Figures A and B, regardless of whether the grounding point is selected or not, and no matter which point is selected to ground the VAB is always -6V, their values are independent of the selected grounding point, so the value of the voltage is absolute.

In general, the potential is the voltage between the reference points that represent the grounding of a certain point; Voltage is the potential difference between two points, so we usually call the voltage between the reference point of a certain point to ground as the potential.

The so-called equipotential is actually the voltage between two or more points to the ground reference point is equal, which is called equipotential.

ECG low potential difference refers to the low voltage of the ECG.

This is a term used in ECG analysis to refer to the low potential of the ECG's electrical activity on the surface side of the body. If the sum of the voltage of the R wave and the voltage of the S wave in each of the three standard leads is not reached, the voltage is too low.

Share. What does low potential mean on an ECG? - Medical Federation**.

Sun Jiamei, deputy chief physician, Hegang People's Hospital.

Top three. Low voltage refers to the sum of the voltages of the QRS wave in the limb leads less than 15 mV or the amplitude of the QRS wave in the thoracic lead less than 10 mV, which is called low voltage. It is recommended to enhance the physique, more.

- Medical Federation**. What does low cardiac potential mean? - 39 Ask the Doctor - 39 Healthnet.

Liu Xiangli, Chief Physician, Rizhao Hospital of Traditional Chinese Medicine.

Top three. So in medicine, as long as it does not exceed 90 degrees, it has no practical significance. It is recommended that you have a further cardiac ultrasound to rule out left ventricular hypertrophy.

39 HealthNet.

The ECG shows a low potential and doesn't understand what it means. - Ask Me Anything - Ask the doctor quickly.

Wu Yan, Chief Physician, Peking University People's Hospital.

Top three. 21st in the country

Hello, ECG low voltage is more common in obesity, developed chest muscles, emphysema and other reasons, low calcium can also lead to low voltage, if there is no chest tightness and shortness of breath and so on.

Ask the doctor quickly.

Everyone is still searching.

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ECG Low Potential - Seeking Medical Advice -

June 17, 2014 Low voltage generally represents a small primary vector of myocardium, sometimes it may be low blood pressure, sometimes it is a thicker chest wall caused by agitation, you can do a cardiac ultrasound to understand cardiac function, only the ejection fraction EF is not less than 50 is not large.

Seek medical advice and ask medicine network.

A physical examination was done to find out what the heart had a low potential difference.

To put it simply, the potential refers to a single point, and the voltage is the potential difference.