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Resistance is a substance that blocks the current. It is often said that the conductor refers to the substance with low resistance, and the substance with high resistance is the insulator.

Resistive elements are energy-consuming elements that hinder current. Different conductors have different resistances. In terms of physics, the greater the resistance of a conductor, the greater the resistance of the conductor to current.

Temperature affects the resistance value of the resistance element. The temperature coefficient refers to the temperature coefficient of the physical quantity that measures the resistance value affected by temperature when every 1°C increase

Resistive elements are widely used in electronic circuits. The resistance of conductors is usually represented by the letter R. The larger units are kiloohms and megaohms (mega=million). The unit of resistance is ohm, abbreviated as ohm, and the symbol is Ω. Transliterated into pinyin and pronounced as ōu, 1Ω=1V/A, etc.

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