Ultrasonic Sensor - L1

What sensor is that shown in the picture ?

• Line Sensor

• Color Sensor

• Photoelectric Sensor

• Ultrasonic Sensor

Ultrasonic sensors are used to detect (a)   and measure distances.

What type of wave does an ultrasonic sensor use to detect objects?

• Radio Waves

• Sound Waves

• Infrared Ways

• Magnetic Waves

What is the usual unit of measurement for the output of an ultrasonic sensor?

• centimeters
• inches
• feet
• meters

Which of the following components emits ultrasonic waves in the sensor?

• Transmitter

• Microphone
• Amplifier
• Speaker

In cars, ultrasonic sensors are most commonly used for (a)   assistance.

Which automatic system uses ultrasonic sensors to detect human presence?

• Wall clock

• Ceiling fan

• Automatic doors

• Manual switch

All the values below are less than 10 cm, EXCEPT:

• 2.5 cm

• 9.9 cm

• 8 cm

• 10.1 cm

Which of the following values is NOT more than 10 cm?

• 15 cm

• 6.3 cm

• 9.9 cm

• 99 cm

Which are the common coding blocks that you need to use when you code for ultrasonic sensor ?

• 
• 
• 
• All the options