Many people have this question: Is the greater the resistance, the better? The answer is not necessarily. With the development of science and technology, more and more products begin to use more advanced technologies to produce, such as power electronics, microelectronic devices, etc. The application of these new materials has increased the resistance value of the resistance. Therefore, this has led to endless debate on this issue.
1: Effect of resistance
Resistance is a physical property of current. It can change in different ways, thus affecting the current flowing through it. This means that the resistor has various functions, which can effectively reduce or prevent the loss of voltage and power. Resistance also plays an important role in protecting electronic components from magnetic field, electric field and electrostatic interference. This makes them more durable and can work under extreme conditions. This is Texas-Instruments-TPS54360BQDDARQ1. However, due to some shortcomings of resistors, improper use may cause problems or damage electronic equipment. For example, when you open the switch, if the resistance is too large, it is easy to cause a short circuit; On the contrary, if the resistance is too small, the energy cannot be transmitted to the output circuit. Therefore, it is very important to select the appropriate resistance according to the specific situation.
2: Principle of influence of electronic components on current
When the current flows through the resistance, the free charge in the circuit will be separated by the electric field force. These separated free charges will generate a voltage, which in turn amplifies and blocks the current through a resistor. This principle can be expressed in mathematical language as: U=E/V, Δ U is the voltage borne by the resistance; A is the difference between the lengths of two conductors connected together, usually called contact impedance; R0 and L are two measuring constants of the resistance value of the conductor material between them. According to the above formula, when both ends of a rectangular cross-section conductor bar lead to infinity, there will be many situations such as the larger LP, the smaller Ln, and the smaller Ω. At this time, because the area between the two metal plates becomes smaller and the resistance increases, the resistance at this place will largely affect the size of the current flowing through it.
3: Advantages and disadvantages of different resistance values
Is the greater the resistance the better? The answer is not necessarily. The advantages and disadvantages of different resistance values are mainly shown in the following aspects: 1. The greater the resistance, the greater the current will be, but it will also cause heat increase; 2. The smaller the resistance, the smaller the heat generation, which can avoid circuit board damage due to heat dissipation; 3. For high-power devices, if appropriate resistance value is selected to measure their performance, the results will be more accurate; 4. When the working environment temperature changes, the high temperature will affect the electronic components, so we should consider using components with high temperature resistance for circuit design; 5. In the production process, the appropriate resistance value must be selected according to the actual situation to ensure that it can meet customer needs.
In short, it is not clear that the greater the resistance, the better, because it depends on many factors. We can only confirm that the performance of the resistor will be affected, but it is not known in which case the resistance value of the resistor is suitable for your needs.