Is there a difference between a resistor and a resistor, and what are the differences between resist

There is a difference between resistance and resistance value. Usually, it is more important to distinguishResistorsand resistance.

1.Definition of resistance.

Resistance (reactance) is the effect of blocking the flow of electric charge, usually using physical quantities.

r. Its unit is ohms.

Its magnitude is what is commonly referred to as the resistance value, or resistance value. Resistance is a physical quantity. This physical quantity is possessed by the resistor.

2.Physical quantity symbol: r

3.Unit Symbol: Ohm

4.Common units: kiloohm (k) megaohms (m) 1 k = 103 1 m = 106

5.Factors that determine the size of the resistance may be: length, cross-sectional area, material, temperature.

A resistor, or resistor for short, is a physical object that obstructs the flow of electrical charge.

These two distinctions are simply as one for an "object" and the other for its "physical quantity".

Usually when narrated in the article, resistors and resistors are not necessarily necessary to distinguish and will not be confused depending on the context. In English, the difference between resistor and resistance is obvious.

Generally speaking, resistance refers to a resistor with a fixed resistance value, and a resistor refers to a resistor with an adjustable resistance value, such as a potentiometer, which is adjustable.

Rheostats such as wirewound resistors can be called resistors.

Resistors can be classified according to materials, which can be divided into five types: wirewound resistors, carbon synthetic resistors, carbon film resistors, metal film resistors, and metal oxide film resistors.

The difference between these five:

First, the materials are different.

1. The wire-wound resistor is made of resistive wire wound into a resistor made of high-resistance alloy wire wound on an insulating skeleton, and the outside is coated with a heat-resistant glaze insulation layer or insulating varnish.

2. Carbon synthetic resistors are made of carbon and synthetic plastics.

3. The carbon film resistor is made by plating a layer of carbon on the porcelain tube, and the crystalline carbon is deposited on the ceramic rod skeleton.

4. The metal film resistor is made by plating a layer of metal on the porcelain tube, and the alloy material is evaporated on the surface of the ceramic rod skeleton by vacuum evaporation.

5. The metal oxide film resistor is made by plating a layer of tin oxide on the porcelain tube, and a layer of metal oxide is deposited on the insulating rod.

Second, the characteristics are different.

The winding resistor has a low temperature coefficient, high resistance accuracy, good stability, heat and corrosion resistance, and is mainly used for precision high-power resistors, but the disadvantage is that the high-frequency performance is poor and the time constant is large.

Carbon film resistors are the most widely used resistors due to their low cost, stable performance, wide resistance range, low temperature coefficient and voltage coefficient.

The metal film resistor has higher precision, better stability, less noise and less temperature coefficient than the carbon film resistor. It is widely used in instrumentation and communication equipment.

Because the metal oxide film resistor itself is an oxide, it is stable at high temperature, resistant to thermal shock, and has a strong load capacity According to the use, there are general, precision, high frequency, high voltage, high resistance, high power and resistance network.

There are the following types of resistors, and the differences are as follows:

Thermistor: It is a kind of resistance value.

Temperature change components are widely used in temperature measurement in industry and home appliances.

Varistor: (my) When the applied voltage of the resistance increases to a certain critical value, the resistor whose resistance value decreases sharply is called a varistor, photoresistor: a photoresistor is an electronic component whose conductivity changes with the change of light force, when a certain substance is exposed to light, the concentration of carriers increases and thus increases the conductivity, resulting in a photoconductive effect, which is widely used in automatic control devices, such as photoswitch, etc.

Force Resistor: Force Resistor is a kind of resistance whose resistance value changes with the change of pressure, which is called piezoelectric resistor in foreign countries. The so-called pressure resistance effect is the effect of the resistivity of semiconductor materials changing with the change of mechanical stress.

It can be made into various moment meters, semiconductor microphones, pressure sensors, etc.

Gas resistor: made by using some semiconductors to absorb a certain gas after redox reaction, the main component is metal oxide, the main varieties are: metal oxide gas resistor, composite oxide gas resistor, ceramic gas resistor, etc.

Magnetoresistor: It is made by using the magnetoresistance effect of semiconductor materials, and the main varieties are, indium antimonide single crystal magnetoresistor, indium antimonide-nickel antimonide magnetoresistor, etc.

Type: Resistor, Resistor, Precision Resistor, Non-Inductive Resistor, Braking Resistor, High Voltage Resistor, Aluminum Case Resistor, Resistance Box, Power Wire Wound Resistor.

Resistors, commonly known as resistors, are one of the more common electronic components, there are many types of resistors in the industry, and commonly used resistors can be divided into several categories according to their structure and use.

The structure can be divided into general resistors, chip resistors and variable resistors; The material division can be divided into ordinary type, precision type, high frequency type, high pressure type, high resistance type, sensitive type, and fuse type. The names can be divided into wirewound resistors, thin film resistors, solid resistors, and sensitive resistors.

In the application of power equipment, the circuit is a high-voltage and high-power circuit, and the requirements for the resistor are relatively high.

By resistance characteristics.

Fixed Resistors, Adjustable Resistors, Special Resistors (Sensitive Resistors).What can't be adjusted, we call it a fixed value resistance or fixed resistance, and what can be adjusted, we call it an adjustable resistance. The common adjustable resistor is a sliding rheostat, for example, the radio volume adjustment device is a circular sliding rheostat, which is mainly used for voltage distribution, which we call a potentiometer.

By manufacturing material.

Carbon film resistors, metal film resistors, wirewound resistors, non-inductive resistors, thin film resistors, etc.

Each type of resistor has a specific function.

The cylindrical black shape may be an electrolytic capacitor, but not necessarily a resistor!!

Of course, the device that consumes electrical energy in the circuit is called an electrical appliance (also called a load). It is a device that works with electrical energy. Other electrical appliances such as electric lights, televisions or resistors. However, voltmeters and ammeters do not belong to electrical appliances, but only tools for repair or maintenance.

The reason why P moves to A and a short circuit occurs is because the resistance value on the sliding rheostat becomes the minimum value of 0 ohms, if P moves to B, then the resistance value on the sliding rheostat becomes the maximum value, and the resistance value on the sliding rheostat becomes the minimum value, indicating that the wire in the circuit shorts the sliding rheostat at this time, and the resistance in the circuit is 0 and the current output is the maximum, so a short circuit will occur.

Not with electrical appliances.

Strictly speaking, electronic components consume electricity.

1. The obstruction effect of the conductor on the current is called the resistance of the conductor. Resistance (usually denoted by "r") is a physical quantity called spring, which in physics indicates the magnitude of a conductor's resistance to an electric current. The greater the resistance of a conductor, the greater the resistance of the conductor to the current.

Different conductors, the resistance is generally different, and resistance is a property of the conductor itself. The resistance of a conductor is usually represented by the letter r, and the unit of resistance is ohm.

2. Resistance is formed by the directional movement of free electrons by the current in a metal conductor. Free electrons collide frequently with metal cations in motion, and the number of collisions per second is as high as about 1015. This collision hinders the directional movement of free electrons, and the physical quantity that indicates this hindrance is called resistance.

Not only metal conductors have resistance, but other objects also have resistance. The resistance of a conductor is determined by its own physical conditions, and the resistance of a metal conductor is determined by its material properties, length, thickness (cross-sectional area), and service temperature.

3. The unit of resistance is ohms, referred to as ohms, which is represented by the Greek letter "". Commonly used units of resistance are kiloohms (k) and megaohms (m).

What is Resistor? To put it simply, resistance refers to the resistance encountered by the current in the circuit, or the obstruction of the current by the object. The greater the resistance, the greater the resistance to the current and therefore the lower the current.

Conversely, the smaller the resistance, the less resistance the current will be, and therefore the greater the current.

The symbol of the resistor is "r". The unit of resistance is ohms, referred to as ohms, and is represented by the letter "q".

Resistance is present in any object, and conductors are no exception. You may have this experience, when the rice cooker is cooking, the wire will heat up a little, the reason is that there is resistance in the copper that makes the wire, although the resistance is very small, but in the case of cooking rice in the case of high-current bending branches, it will still consume local electrical energy and distribute it in a hot way.

So is the resistor perfect? Of course not. It is because of the resistance that we are able to control the magnitude of the current. In order for the current to do the work according to people's wishes, resistors were created. After that, I will introduce you to what a resistor is.