How magnetometer works? | Working of magnetometer in a smartphone | MEMS inside magnetometer

This video tutorial introduces the magnetometer, a device used to detect magnetic fields, and explains its functionality in smartphones. It delves into the Hall effect, a principle where a voltage is generated across a conductor in a magnetic field, and how this principle is applied in Hall effect sensors to measure magnetic fields. The video also covers the changes in electron density and force experienced by charged particles in a magnetic field, leading to potential differences. Finally, it discusses the output of Hall effect sensors and concludes with a call to action for viewers to engage with the content.

What is the primary function of a magnetometer in smartphones?

• To monitor battery life

• To measure temperature

• To detect magnetic fields for direction

• To calculate speed

According to the Hall effect, what happens when a current-carrying conductor is placed in a magnetic field?

• The current stops flowing

• The conductor changes color

• A voltage is generated across the conductor

• The conductor heats up

What causes the change in electron density in a metal sheet when subjected to a magnetic field?

• The type of metal used

• The temperature of the metal

• The force experienced by moving charges

• The size of the metal sheet

How does increasing the magnetic field affect the voltage in a Hall effect sensor?

• The voltage remains constant

• The voltage becomes zero

• The voltage decreases

• The voltage increases

What is the output of a Hall effect sensor proportional to?

• The magnetic field

• The size of the sensor

• The speed of the current

• The temperature of the environment