Which component could be considered a resistive load in a vehicle's electrical system?

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Multiple Choice

Which component could be considered a resistive load in a vehicle's electrical system?

A resistive load converts electrical energy to heat (and light) in a way that follows Ohm’s law, meaning the current drawn is mainly determined by the applied voltage and the device’s resistance. A stereo or radio fits this role because it primarily consumes power to operate its electronics and speakers, acting as a passive consumer of the 12V supply rather than a power source or a highly dynamic inductive device. The current it draws is relatively stable for a given supply, characteristic of a resistive load. The other options don’t fit as resistive loads: the alternator is a power source, not a load; the fuel injector is an inductive solenoid whose current is controlled and often pulsed, so its impedance isn’t a simple resistor; and the headlight switch is a control switch, not the load itself (the lights would be the load, and they are not represented here).

A resistive load converts electrical energy to heat (and light) in a way that follows Ohm’s law, meaning the current drawn is mainly determined by the applied voltage and the device’s resistance. A stereo or radio fits this role because it primarily consumes power to operate its electronics and speakers, acting as a passive consumer of the 12V supply rather than a power source or a highly dynamic inductive device. The current it draws is relatively stable for a given supply, characteristic of a resistive load.

The other options don’t fit as resistive loads: the alternator is a power source, not a load; the fuel injector is an inductive solenoid whose current is controlled and often pulsed, so its impedance isn’t a simple resistor; and the headlight switch is a control switch, not the load itself (the lights would be the load, and they are not represented here).

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