Answered

Which of the following applies to a Hall Effect sensor?


AIt is a variable resistor that changes resistance when temperature changes.
BDevice that allows current to flow when a magnetic field is present.
CIt is used to convert mechanical position into an electrical signal.
DDevice that acts like a ground side switch that is activated by light.

Verified Answer :

Final answer:

The Hall Effect sensor detects magnetic fields and allows current to flow when such fields are present, making option OB the correct choice. Other options describe unrelated devices. Understanding the working principle based on electromagnetism is key to grasping the function of Hall Effect sensors.


Explanation:

Understanding Hall Effect Sensors

A Hall Effect sensor is a device that detects the presence of a magnetic field and produces an output voltage that is proportional to the strength of that field. Among the given options, the correct answer is OB) Device that allows current to flow when a magnetic field is present.

Here's a bit more detail about Hall Effect sensors:

  • The Hall Effect is based on the principles of electromagnetism, stating that when a magnetic field is applied to a conductor carrying an electric current, it results in a voltage (the Hall voltage) perpendicular to both the magnetic field and the current direction.
  • Hall Effect sensors are commonly used in various applications such as automotive systems (e.g., in anti-lock braking systems), position sensing, speed detection, and in some memory devices.
  • These sensors can be either analog or digital devices, depending on their output configuration.

In contrast, the other options describe different types of devices:

  1. OA refers to thermistors, which change resistance with temperature.
  2. OC describes potentiometers or encoders used for position measurement.
  3. OD refers to phototransistors activated by light.

Learn more about Hall Effect sensor here:

https://brainly.com/question/30708744


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