MT - Chapter 4

What is the working principle of a magnetic proximity sensor?

• Detection of changes in light intensity

• Induction of an electric current by a magnetic field

• Detection of capacitance changes

• Measurement of sound waves

Which of the following materials can a magnetic proximity sensor typically detect?

• Plastic

• Glass

• Ferromagnetic materials

• Ceramic

What happens when a magnetic field interacts with the sensing element of a magnetic proximity sensor?

• The sensor produces a voltage or current

• The sensor emits infrared light

• The sensor detects a change in capacitance

• The sensor generates a sound wave

Which component in a magnetic proximity sensor helps detect the presence of a magnetic field?

• Capacitor

• Inductor

• Hall-effect sensor

• Photodiode

Which of the following applications commonly utilizes magnetic proximity sensors?

• Automatic door openers

• Level sensors in tanks

• Position sensing in robotic arms

• All of the above

What is the main advantage of using magnetic proximity sensors over mechanical switches?

• They are more expensive.

• They are less reliable.

• They are more susceptible to environmental factors.

• They offer non-contact sensing and increased durability.

What is the primary principle behind the operation of a magnetic proximity sensor?

A. Detecting changes in electrical resistance due to a magnetic field.

B. Measuring the inductance of a coil in response to a magnetic field.

C. Sensing the presence of a magnetic field using Hall effect sensors.

D. All of the above.

• A

• B

• C

• D

What is the core component of a magnetic proximity sensor that detects the presence of a magnetic field?

• A. Action indicator light

• B. Housing

• C. Reed switch

• D. Wires

How does a reed switch respond to a magnetic field?

• A. It emits light.

• B. It generates an electric current.

• C. It changes its electrical resistance.

• D. It physically switches between open and closed states.

What is the primary function of the action indicator light in a magnetic proximity sensor?

• A. To amplify the magnetic field.

• B. To provide visual confirmation of sensor activation.

• C. To protect the reed switch from damage.

• D. To regulate the flow of electric current.