measure voltage
measure temperature
sense a vacuum
sense the presence of a magnetic object. E. None of the above
Answer is Right!
Answer is Wrong!
The correct answer is D. A Hall effect switch is usually used to sense the presence of a magnetic object.
A Hall effect switch is a type of switch that uses the Hall effect to detect the presence of a magnetic field. The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current.
Hall effect switches are used in a variety of applications, including:
- Position sensors: Hall effect switches can be used to detect the position of a moving object, such as a piston in an engine.
- Speed sensors: Hall effect switches can be used to measure the speed of a rotating object, such as a wheel on a car.
- Proximity sensors: Hall effect switches can be used to detect the presence of an object without making physical contact with it.
- Hall effect switches are also used in some types of security systems, such as door locks and alarms.
Options A, B, and C are incorrect because Hall effect switches are not typically used to measure voltage, temperature, or vacuum.