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A resistor is one of the most fundamental components in any electronic circuit, used to control the flow of electrical current. In this resistor guide, you’ll learn the basics of how resistors work, their main functions, and why they’re essential in building safe and functional circuits. Learn resistor types, color code charts, formulas, and solved examples for JEE, NEET, and CBSE 2025. Boost Physics scores with expert tips. A resistor is an electrical device that resists the flow of current and develops a voltage drop. Learn about different types of resistors, how to measure and calculate their resistance, and how to use color code and symbols to identify them. A Resistor acts as a main electronic component in regulating or limiting the flow of an electric current in an electrical circuit. It is mainly used in electronic circuits because it acts as a current controller, it controls high and low voltage and it protects the components.
