Question

which of the following is often used as an actuator to control other actuators when the computer needs to control a high - current load?

a. solenoids
b. thermistors
c. motors
d. relays

Explanation:

• Solenoids are electromechanical devices that convert electrical energy into linear motion. They are not typically used as actuators to control other actuators for high - current loads.
• Thermistors are temperature - sensitive resistors. Their main function is to measure temperature, not to control high - current loads as actuators.
• Motors convert electrical energy into mechanical energy (rotational motion). While they are actuators, they are not commonly used to control other actuators for high - current loads in the way described.
• Relays are electrical switches that can control a high - current circuit with a low - current signal (such as from a computer). They are often used as actuators to control other actuators when dealing with high - current loads.

Answer:

d. Relays