Microcontroller Quiz Chapter 5

What is the purpose of a robot?

• To entertain humans

• To help humans in some way

• To compete with humans

• To replace humans

Which type of motor runs on direct current (DC) voltage?

• Stepper motors

• DC motors

• AC motors

• Servo motors

What is used to connect the wires wound around the shaft of a DC motor to the external circuit?

• Pulleys

• Belts

• Brushes

• Gears

How can you control the speed of a DC motor using Arduino?

• By changing the motor's physical gears

• By adjusting the motor's weight

• By applying pulse-width modulation (PWM)

• By changing the motor's color

What is the function of an H-bridge in controlling motor direction?

• It changes the motor's color

• It changes the motor's weight

• It changes the polarity of the voltage flow

• It controls the motor's speed

What is the purpose of using a transistor in controlling a motor circuit?

• To separate the control signal from the switch

• To change the motor's color

• To change the motor's physical gears

• To increase the motor's weight

What type of motor is popular for use in devices that require fine control, such as robots and model airplanes?

• AC motor

• DC motor

• Stepper motor

• Servo motor

How many wires does a servo motor typically have?

• Three

• Two

• Five

• Four

What is the function of the LiquidCrystal library in Arduino projects?

• To output data on LCD devices

• To communicate with servo motors

• To control DC motors

• To control stepper motors

Which function in Arduino is used to create a PWM output on a digital interface pin?

• analogRead()

• digitalWrite()

• analogWrite()

• digitalRead()