Besides current limiting, what other role can a resistor serve?

Besides current limiting, what other role can a resistor serve?

• A. Voltage Regulator
• B. Signal Processor
• C. Temperature Sensor
• D. Ground Reference

Answer: (A)

A resistor can help establish a stable voltage in a circuit when used with other components, not just limit current. In a simple regulator setup, the resistor feeds current into a regulation element (like a Zener diode or a transistor pass stage). The resistor drops the excess supply voltage and, by supplying enough current to the regulator element, helps keep the output voltage roughly constant as the load changes. In this way, the resistor participates in producing a controlled, regulated voltage for the downstream circuitry. The other roles listed don’t describe a typical function of a standard resistor. It doesn’t process signals, and a fixed resistor isn’t a temperature sensor or an inherent ground reference (those roles would require other components or specific sensor elements).

A resistor can help establish a stable voltage in a circuit when used with other components, not just limit current. In a simple regulator setup, the resistor feeds current into a regulation element (like a Zener diode or a transistor pass stage). The resistor drops the excess supply voltage and, by supplying enough current to the regulator element, helps keep the output voltage roughly constant as the load changes. In this way, the resistor participates in producing a controlled, regulated voltage for the downstream circuitry.

The other roles listed don’t describe a typical function of a standard resistor. It doesn’t process signals, and a fixed resistor isn’t a temperature sensor or an inherent ground reference (those roles would require other components or specific sensor elements).