Internet of things using arduino
Q1. How does an ultrasonic sensor determine the distance to an object?
a) By measuring the time it takes for sound waves to travel and return
b) By analyzing the frequency of sound waves emitted
c) By measuring the intensity of sound waves reflected
d) By detecting changes in air pressure
Q2. What is the name of the ultrasonic sensor commonly used with Arduino boards?
a) HC-SR04
b) IR Distance Sensor
c) PIR Sensor
d) LIDAR Sensor
Q3. What is the typical voltage range used to power the HC-SR04 ultrasonic sensor?
a) 3.3V
b) 5V
c) 9V
d) 12V
Q4. Which component of an ultrasonic sensor is responsible for emitting sound waves?
a) Transmitter
b) Receiver
c) Microcontroller
d) Amplifier
Q5. Which statement accurately describes the operation of an ultrasonic sensor?
a) Emits and receives sound waves continuously
b) Emits sound waves only when triggered
c) Receives sound waves only when triggered
d) Emits and receives sound waves simultaneously
