Among the following, which is a common resistive load in automotive circuits?

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Multiple Choice

Among the following, which is a common resistive load in automotive circuits?

Recognizing a common resistive load means identifying a device that primarily dissipates electrical energy as heat due to its resistance. An automotive headlight bulb fits this: its filament acts as a resistor, so it draws current according to Ohm’s law and converts most of that energy into light and heat. The current through it is largely determined by the supply voltage and its roughly fixed resistance, making it a classic resistive load. The other components don’t fit as typical resistive loads. The alternator is a power source that generates electricity to charge the battery, not a device that consumes it. The fuel pump is an electric motor (an inductive load) that converts electrical energy into mechanical motion and is influenced by inrush and back-EMF. The crankshaft position sensor is a small electronic sensor that draws relatively little current for signaling rather than acting as a substantial resistive element.

Recognizing a common resistive load means identifying a device that primarily dissipates electrical energy as heat due to its resistance. An automotive headlight bulb fits this: its filament acts as a resistor, so it draws current according to Ohm’s law and converts most of that energy into light and heat. The current through it is largely determined by the supply voltage and its roughly fixed resistance, making it a classic resistive load.

The other components don’t fit as typical resistive loads. The alternator is a power source that generates electricity to charge the battery, not a device that consumes it. The fuel pump is an electric motor (an inductive load) that converts electrical energy into mechanical motion and is influenced by inrush and back-EMF. The crankshaft position sensor is a small electronic sensor that draws relatively little current for signaling rather than acting as a substantial resistive element.

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