Multiple Choice
A relay is a device that ________.
A) isolates the actuating signal from the control signal
B) has a coil to actuate some contacts that control other circuits
C) uses an electromagnet to open and close contacts
D) all of these
Correct Answer:
Verified
Correct Answer:
Verified
Q21: For a high current switching application where
Q22: The magnetic term that is equivalent to
Q23: Hysteresis is a characteristic of magnetic materials
Q24: If the cross-sectional area of a magnetic
Q25: The opposition)to being magnetized is called permeability
Q27: Soft iron, copper, and silver make good
Q28: If a basic one-loop, dc generator rotates
Q29: A weber is a unit of _.<br>A)reluctance<br>B)permeability<br>C)magnetic
Q30: In which one of the following applications
Q31: How will two permanent bar magnets react