翻译---TEXT Resistors are the most commonly used components in electronics, and their purpose is to create specified values of the current and voltage in a circuit. A number of different resistors are shown in the photos below (The resistors are put on the paper about a millimeter thick, which are spaced out 1 cm apart to give some idea of the dimensions). Fig. 1.1.1 shows some low-power resistors, while Fig. 1.1.2 shows some high-power resistors. Resistors with power dissipation below 5 watt (most commonly used types) are cylindrical in shape, with a wire protruding from each end for connecting to a circuit (Fig. 1.1.1). Resistors with power dissipation above 5 watt are shown below (Fig. 1.1.2). Special English for Electrical Engineering and Automation - 吴艳 Other visible elements: - Logo: Circular logo with the letters "IIT" inside a stylized 'M' shape. Text around the logo seems to be Chinese characters and "-1953-" at the bottom. The Chinese characters appear to be "常州机电职业技术学院". Chart/Diagram Description: The image is a photograph of a computer screen displaying a presentation slide. The slide has a green background. There is a title "TEXT" at the top-left, accompanied by two cartoon characters holding pencils. The main content is a block of text in the center, describing resistors. At the bottom, there is a footer text "Special English for Electrical Engineering and Automation - 吴艳" on an orange bar. A circular logo is visible on the right side. No charts, diagrams, or specific geometric figures other than the logo shape are present as part of the problem content itself. The text refers to figures (Fig. 1.1.1, Fig. 1.1.2) which are not shown in this image.

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Resistors are the most commonly used components in electronics, and their purpose is to create specified values of current and voltage in a circuit. Low-power resistors below 5 watts are cylindrical in shape with wires protruding from each end, while high-power resistors above 5 watts have different construction for better heat dissipation. Resistors are the most commonly used components in electronics, and their purpose is to create specified values of current and voltage in a circuit. Low-power resistors below 5 watts are cylindrical in shape with wires protruding from each end, while high-power resistors above 5 watts have different physical structures for better heat dissipation. The main functions of resistors include limiting current flow, voltage division, heat generation, and signal conditioning. Resistors work according to Ohm's law, where voltage equals current times resistance. In this simple circuit, the resistor limits the current flowing through the LED to protect it from damage. Low-power resistors with power dissipation below 5 watts are cylindrical in shape, with a wire protruding from each end for connecting to a circuit. They are the most commonly used types in electronics, featuring color bands that indicate their resistance value and tolerance. High-power resistors with power dissipation above 5 watts have different physical structures designed for better heat dissipation. They feature larger surface areas, heat sink fins, and mounting holes for secure installation in high-current applications. Resistors play crucial roles in electrical engineering, from protecting sensitive components to signal processing and power dissipation. Whether in simple LED circuits or complex industrial control systems, resistors are indispensable basic components. Understanding their characteristics and applications forms an important foundation for learning electrical engineering and automation. Low-power resistors with power dissipation below 5 watts are cylindrical in shape, with a wire protruding from each end for connecting to a circuit. They are the most commonly used types in electronics, featuring color bands that indicate their resistance value and tolerance. High-power resistors with power dissipation above 5 watts have different physical structures designed for better heat dissipation. They feature larger surface areas, heat sink fins, and mounting holes for secure installation in high-current applications. Resistors play crucial roles in electrical engineering, from protecting sensitive components to signal processing and power dissipation. Whether in simple LED circuits or complex industrial control systems, resistors are indispensable basic components. Understanding their characteristics and applications forms an important foundation for learning electrical engineering and automation.