DC Motor and Arduino Robotics Worksheet

What is the primary function of a DC motor in a robotics context?

• To store electrical energy

• To convert electrical energy into mechanical motion

• To amplify electrical signals

• To regulate voltage

Which component in a DC motor controls the current direction to maintain rotation?

• Motor driver

• Commutator

• Capacitor

• Resistor

What is the role of a motor driver in controlling a DC motor?

• To convert AC to DC

• To provide a user interface

• To amplify current and control motor speed and direction

• To store program code

Which Arduino command sets a pin as an output?

• digitalRead(pin)

• pinMode(pin, INPUT)

• pinMode(pin, OUTPUT)

• analogWrite(pin, value)

Where is the command to set an Arduino pin as output typically placed?

• In the loop() function

• In the setup() function

• After the main program ends

• Inside a delay() function

What does PWM stand for?

• Pulse Width Modulation

• Power Wave Management

• Pulse Wave Measurement

• Programmed Width Motion

What is the purpose of PWM in controlling a DC motor?

• To measure motor temperature

• To provide variable speed control by adjusting power delivered

• To change motor polarity

• To store motor settings

What is the PWM value range used in Arduino's analogWrite() function?

• 0 to 255

• 0 to 1023

• -255 to 255

• 0 to 100

What does the duty cycle in PWM represent?

• The total frequency of the signal

• The ratio of ON time to total period of the signal

• The voltage supplied to the motor

• The resistance of the motor coil

In a typical two-motor robot, which Arduino pins control the left motor?

• Pins 2 and 3

• Pins 5 and 6

• Pins 9 and 10

• Pins 11 and 12