24/25 ODD IOT QUIZ 3

What is the function of the Trig pin in the ultrasonic sensor?

• Receive reflected signal

• Send ultrasound wave

• Measure distance

• Generate LED light

How does the ultrasonic sensor calculate distance?

• By detecting colors

• By measuring temperature

• By counting pulses

• By using speed and time

What happens if there is no object in the path of the ultrasound wave?

• Echo pin goes high

• Echo pin stays low

• Echo pin sends a signal

• Echo pin times out

Why is the end result of the distance calculation divided by 2?

• To account for bounce back

• To adjust for speed

• To reduce errors

• To increase accuracy

What is the purpose of the program in the Arduino code?

• To calculate distance

• To turn on the LED

• To control the sensor

• To generate sound waves

What is the role of the Echo pin in the ultrasonic sensor?

• Control LED output

• Calculate distance

• Listen for reflected signal

• Send ultrasound wave

What is the speed of the ultrasound emitted by the sensor?

• 50,000 Hz

• 40,000 Hz

• 30,000 Hz

• 20,000 Hz

What is the function of the pulseIn() function in the Arduino code?

• Measure time duration

• Calculate distance

• Control LED output

• Send ultrasound wave

What does the digitalWrite(trigPin, HIGH) command do in the Arduino code?

• Turn on LED

• Calculate distance

• Set pin to high state

• Send ultrasound wave

What is the purpose of the Serial.begin(9600) command in the Arduino code?

• Sends ultrasound wave

• Controls LED output

• Calculates distance

• Starts the serial communication