DC circuitsQuestion 574 of 1506

What is the main purpose of a resistor in a circuit?

  1. To produce usable heat
  2. To store charge
  3. To produce light
  4. To provide a set amount of resistance
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Correct answer: To provide a set amount of resistance

Resistors give a set resistance. Heat is a by-product.

Source: Lessons in Electric Circuits I: DC (Kuphaldt), 2.5: Resistors

Practice dc circuits

Questions last reviewed: 18 October 2026