What is the difference between a resistor and a resistor
* 来源: * 作者: admin * 发表时间: 2019-09-25 10:53:54 * 浏览: 81
What is a resistor? A resistor is a kind of current limiting element that we are very familiar with. I believe that many friends have some understanding of it no matter in the physics textbooks of junior high school or in the production and life now. So, what is a resistor, let's follow the small series to understand the difference between resistors and resistors, let's learn!
What is a resistor
What are the resistors? Resistor are generally directly called resistors in daily life. Is a current limiting element. When a resistor is connected to a circuit, the resistor has a fixed resistance value, usually two pins, which limits the amount of current flowing through the branch it is connected to. Those whose resistance cannot be changed are called fixed resistors. A variable resistor is called a potentiometer or variable resistor. An ideal resistor is linear, that is, the instantaneous current passing through the resistor is proportional to the instantaneous voltage applied. A variable resistor used for voltage division. On a bare resistor body, one or two removable metal contacts are pressed tightly. The contact position determines the resistance value between either end of the resistor body and the contact.
What is a resistor, have to determine the function relationship between terminal voltage and current, embody the ability of electrical energy is converted into other forms two terminal devices, with the letter R, the unit for ohm Ω. Actual devices such as light bulbs, electric wires, resistors, etc., can be expressed as resistors.
What is a resistor? The resistance value of a resistance element is generally related to temperature, material, length, and cross-sectional area. The physical quantity to measure the resistance affected by temperature is the temperature coefficient, which is defined as the percentage change in the resistance value for every 1℃ increase in temperature. The main physical feature of a resistance is that it can be transformed into heat energy, or it can be said to be a energy-consuming element through which an electric current passes to produce internal energy. Resistance in the circuit usually plays the role of partial voltage, shunt. For signals, both AC and DC signals can pass through resistance.
The difference between a resistor and a resistor
The differences between resistors and resistors, Resistor (Resistor) for short, are physical objects that impede the flow of charge; Reactance (electrical resistance), is the effect of charge flow blocking, usually represented by physical quantity R. It's in ohms. Its size is known as the resistance value, or resistance value. Resistance is a physical quantity. This quantity is possessed by the resistor. The two distinctions are simply that one refers to an object and the other to its physical quantity.
The relationship between resistance and current
1. Although it is a few electrical terms, among which there are many theories, to put it simply:
Current - The flow of charge through a conductor is electric current.
Resistance - The resistance encountered by a charge as it flows through a conductor is called resistance.
Voltage - The potential difference between two points in a circuit is the voltage.
2.The relationship between resistance and current
In a closed circuit, when add on both ends of the load voltage is constant, by electric current in a circuit size is inversely proportional to the resistance in a circuit, that is constant voltage and is a fixed number, large resistance in a circuit by the resistance of current is small, whereas resistance in a circuit hours through the resistance of the current is big.
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