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What device is used to apply resistance in an electric circuit?

  1. Capacitor

  2. Resistor

  3. Inductor

  4. Transformer

The correct answer is: Resistor

The device used to apply resistance in an electric circuit is a resistor. Resistors are specifically designed to limit the flow of electric current, creating a drop in voltage within the circuit according to Ohm's Law (V = IR). They play a crucial role in setting the proper current levels for electronic components, protecting sensitive devices from excess current, and allowing for precise control of voltage levels in circuits. Resistors can come in various forms and values and are often used to fine-tune a circuit's performance, manage signal levels, and divide voltages. They are fundamental components in both analog and digital electronic systems, which is why they are commonly recognized as the primary means of introducing resistance into a circuit.