What is the function of a resistor in a circuit?

A RESISTOR OPPOSES (limits) the flow of electric CURRENT, controlling how much current flows and dropping voltage in a circuit. ASVAB Electronics Information tests components. Resistance is measured in OHMS (Ω). Resistors protect components, set current levels, and divide voltage. Other components: CAPACITOR (stores electrical energy); INDUCTOR (stores energy in a magnetic field, opposes current changes); TRANSISTOR (amplifies/switches); DIODE (allows current one direction). Knowing the resistor limits/opposes current is fundamental, commonly tested electronics knowledge.