Door Alarm

" A moving electric charge generates a magnetic field"

• True

• False

Electricity and magnetism are two related phenomena produced by the electromagnetic force. What does it form together ?

• 
  Electrostatic effect

  
  

• Electromagnetism

• Electrolysis

• Magnetism

Which code helps in measuring the magnetic strength of microbit?

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• 
• 
• 

What happens when the magnet moves away from the microbit ?

• Magnetic strength reduces

• Magnetic strength increases

• Magnetic strength remains same

• Magnetic strength reduces to 0

How does the code visually differentiate between low and high magnetic force?

• By changing the color of the display.

• By displaying different icons.

• By making a sound.

• By blinking the LED.

What is the purpose of the "else if" block in this code?

• To stop the code if magnetic force is less than 200 µT.

• To show the second icon if the magnetic force is 200 µT or higher.

• To reset the system.

• To measure temperature instead of magnetic force.

How would you modify the code to alert when the magnetic force exceeds 250 µT?

• Change the threshold to 250 µT in the first "if" condition.

• Increase the value of the second icon.

• Remove the "else if" block.

• Replace the magnetic force value with 250 µT in the "show number" block.

Why is the "forever" loop used in this code?

• To ensure the button is always ready to be pressed.

• To continuously monitor and respond to changes in magnetic force.

• To allow the microcontroller to enter sleep mode.

• To reset the program after each iteration.

What is the unit of the magnetic force used in this code?

• Newton (N)

• Tesla (T)

• Microtesla (µT)

• Gauss (G)

What happens when button A is pressed in this code?

• It resets the program.

• It shows the number representing the magnetic force.

• It starts the "forever" loop.

• It turns off the microcontroller.