Final answer:
A 100K resistor is a passive electrical component with a resistance value of 100 kilo-ohms, and it is used to limit the current in a circuit. It is neither a sensor, actuator, nor control device. When working with resistors, relevant parameters include the voltage across them and the current flowing through them.
Step-by-step explanation:
The type of device that a 100K resistor is, refers to a component used in electrical and electronic circuits. The 100K specifies the resistance value of the component, which is 100 kilo-ohms. A resistor is a passive device that doesn't add any energy into the circuit; instead, it dissipates energy in the form of heat, which comes from the current in the resistor passing through it. Therefore, when looking at the question, the correct answer is D. None of the above, since a resistor is neither a sensor, actuator, nor control device.
When analyzing a circuit involving a resistor, one might be interested in the voltage across the resistor or the current in the resistor, as these parameters are related by Ohm's law (V = IR, where V is voltage, I is current, and R is resistance). However, the function of the resistor itself remains the same despite these considerations.