Starters, contactors, and ______are similar in construction and operation.
A)mechanical thermostats
B)symbols
C)breakers
D)relays

Question

Quizplus · Accepted Answer

Starters, contactors, and relays are similar in construction and operation as they all use electromagnetic forces to control the switching of electrical circuits. They all have a coil that creates a magnetic field to pull in a contact or set of contacts to make or break a circuit. Mechanical thermostats and breakers, on the other hand, do not use electromagnetic forces and have different construction and operation. Starters, contactors, and relays are all electromagnetic switching devices that use a solenoid to control the operation of an electrical circuit. They all work by energizing the solenoid coil, which then moves a set of contacts to open or close the circuit. Mechanical thermostats and symbols are not similar in construction or operation to starters, contactors, or relays. Breakers, while also used for circuit control, are different in construction and function as they trip in response to overcurrents in a circuit to protect against damage.

Starters, Contactors, and ______Are Similar in Construction and Operation