Digital electronics 7D202421

What is the main application of an ultrasonic sensor in an automated parking project?

• Measure soil humidity.

• Detect nearby objects to avoid collisions.

• Control ambient temperature.

• Regulate the intensity of light in a room.

What is the primary function of a servomotor in an automatic door project?

• Regulate the pressure of the door.

• Count the number of people entering through the door.

• Open and close the door according to received instructions.

• Measure the distance between objects.

What causes a photoresistor to change its electrical resistance?

• Ambient temperature.

• Amount of light received.

• Wind speed.

• Soil humidity.

What is the main function of a photoresistor in an automatic lighting project?

• Regulate the environment's temperature.

• Detect the presence of nearby objects to change the light.

• Adjust the brightness of the lights according to ambient light.

• Measure soil humidity.

Why is it important to use a resistor when connecting an LED to an Arduino?

• To increase the intensity of the light emitted by the LED.

• To prevent the LED from burning out due to excessive current.

• To change the color of the light emitted by the LED.

• To reduce the amount of light emitted by the LED.

What is the main function of an LED in a traffic signaling project?

• Regulate ambient temperature.

• Control the speed of traffic.

• Indicate when to stop or go.

• Measure the distance between vehicles.

Which of the following statements best describes the purpose of code analysis in Arduino?

• Determine the physical length of the code.

• Find errors or improvements in the code.

• Measure the efficiency of the hardware used.

• Check the quality of the wiring.

What type of signal can have values like 0.5, 1.2, or 3.8?

• Digital signal.

• Analog signal.

• PWM signal.

• Radiofrequency signal.

How is the position of a servomotor controlled using Arduino?

• By changing the frequency of the signal.

• By varying the intensity of the current.

• By directly connecting to the power pins.

• By sending PWM pulses.

Which of the following statements best describes an analog signal?

• It is a signal that can only take values 0 or 1.

• It is a signal that can take any value within a continuous range.

• It is a signal that can only represent integers.

• It is a signal that cannot be processed by a microcontroller.