Day#5

What component in an ultrasonic sensor emits the sound wave?

• Echo pin

• Trig pin

• Transmitter

• Receiver

What component in an ultrasonic sensor receives the reflected wave?

• Receiver

• Trig pin

• Transmitter

• VCC

Which pin of Arduino is used for reading analog values from potentiometers?

• A0

• D0

• GND

• 13

A potentiometer has how many terminals?

• 1

• 2

• 3

• 4

In a potentiometer-controlled motor, increasing resistance will:

• Increase speed

• Decrease speed

• Reverse motor

• Turn off sensor

Ultrasonic sensors work based on the principle of:

• Light reflection

• Magnetic induction

• Sound echo

• Infrared detection

analogWrite() is used to:

• Read voltage

• Send digital signal

• Create delay

• Send PWM signal

What does PWM stand for?

• Pulse Width Motor

• Pulse Width Modulation

• Power With Measurement

• Pin Width Mapping

What is the maximum value returned by analogRead() on Arduino Uno?

• 1000

• 1023

• 255

• 10

Which of the following can be used to change LED brightness smoothly?

• digitalWrite()

• analogRead()

• analogWrite()

• pinMode()