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1. Find an English material on electronic components. Resistors, capacitors, and inductors are important components of electronic circuits. It is necessary to learn some knowledge about resistors, capacitors, and inductors. Resistors are electronic components that can impede the flow of current. The current flowing through a resistor is proportional to the voltage applied across the resistor. It is inversely proportional to the resistance of the resistor. This is Ohms Law, which can be expressed as I=U/R using a formula. Resistors are generally linear devices, and their (volt ampere) characteristic curve forms a straight line. Resistors can be divided into fixed resistors and variable resistors, as well as linear resistors and nonlinear resistors. The resistance to current is called resistance, represented by the letter R, and the unit of resistance is ohms, usually expressed in ohms. The definition of 1 Ω is the resistance value required to make the current of the conductor 1A when the voltage applied to the conductor is 1V. The commonly used resistance values are kiloohms (K Ω) and megaohms (M Ω). Resistors that prevent the flow of current generate heat and result in maximum power loss, measured in watts. If the resistor is connected in parallel with the power supply, the resistor limits the current flowing into the device. If a resistor is connected in series with the power supply, the resistor becomes a voltage divider. If the resistors in the circuit are connected in series, then adding up all the individual resistors can calculate the total resistance. The calculation formula is RT=R1+R2+R3+...+Rn. Among them, RT is the total resistance value, and R1~Rn are the respective resistance values. It is slightly difficult to calculate the total resistance value when parallel resistors are included in the circuit. The sum of the reciprocal of each resistor is equal to the reciprocal of the total resistor. The calculation formula is 1/RT=1/R1+1/R2+1/R3+...+1/Rn. If only two resistors are connected in parallel, a simpler formula RT=(R1 · R2)/(R1+R2) can be used. If you are interested in electronic technology, it is recommended to learn the color code method to identify resistors, which will bring a lot of convenience. The explanation of the ribbon is as follows. The first color band (near the end of the resistor) is the first significant digit of the resistance ohm level; The second color band represents the first significant digit of the resistance ohm level; To determine the nominal ohm value of the resistor, the third color band represents the multiplier or the number of zeros following the first two significant digits; The fourth color band represents the percentage of tolerance information. That is, how much percentage of the resistance value changes from its color code value and still falls within the manufacturers technical specifications; The fifth color band, when it appears, represents the failure rate (expressed as a percentage) per 1000 hours of use. It is sometimes referred to as the reliability factor. Capacitors and capacitive electrical energy can be stored in an electric field, and devices that can store electrical energy are called capacitors. A capacitor is composed of two metal plates separated by a dielectric. If a capacitor is connected to a battery, electrons will flow out from the negative electrode of the battery and accumulate on the metal plate of the capacitor connected to it. At the same time, electrons flow

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