Electric Motors 1

Devices consisting of a glass tube containing two small ferromagnetic (easily magnetized) metal reeds are called _____

The magnetic reed switch is a fast operating, single-pole, single-throw switch with a _____

_____ materials conduct magnetic lines of force very well

_____ materials, such as aluminum and platinum, conduct magnetic lines of force poorly

The Hall-Effect sensor uses the principle of _____ to sense the presence of a magnetic object

A Hall-Effect sensor that senses only _____ can help avoid false triggering of the sensor

If the Hall effect sensor's amplifier is _____, the output of the switch will rapidly change from one state to the other when a magnetic field is sensed by the device

The photoelectric sensor uses the principle of _____ to sense the presence of an object

To keep a photoelectric sensor from being actuated by sunlight or regular lighting, sensors generally use _____ light

When light that strikes a highly polished target is reflected away at the same angle that it strikes the object's surface, it is called _____