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Page 142 - Toucpad robotics C11
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    C.  State whether these statements are true or false.
                      1.  Servo motors are always used for continuous rotation applications.
                      2.  Feedback is a defining feature of closed-loop systems.

                      3.  Ultrasonic sensors can detect transparent glass surfaces with perfect accuracy.
                      4.  A controller acts as the decision-making unit of a robot.
                      5.  DC motors are unsuitable for generating continuous motion.

                  D.  Match the Following:
                      1.  Servo motor                    a.  Discrete step rotation
                      2.  Stepper motor                  b.  Distance detection using sound waves

                      3.  Ultrasonic sensor              c.  Precise angular positioning
                      4.  IR sensor                      d.  Heat and obstacle detection
                      5.  Controller                     e.  Processes input and controls actuators

                                                    SECTION B   (Subjective Type Questions)

                  A.  Short answer type questions.
                      1.  Why is PWM essential in controlling DC motor speed?
                      2.  Differentiate between open-loop and closed-loop systems with suitable examples.
                      3.  State one application each for servo motors, stepper motors, and DC motors.

                      4.  How does an ultrasonic sensor calculate distance?
                      5.  Why is feedback critical for robotic accuracy and safety?

                  B.  Long answer type questions.
                      1.  Explain the working principles and applications of DC, servo, and stepper motors in robotics.
                      2.   Discuss how  sensors (IR  and Ultrasonic) enhance a robot’s  ability  to interact  with its  environment. Include
                         examples of real-world applications.
                      3.   Describe the significance of control systems in robotics. Compare open-loop and closed-loop systems, highlighting
                         advantages, disadvantages, and use cases.

                                                                                                    21 st
                  C.  Competency-based questions:     HOTS                                        Century   #Experiential Learning
                                                                                                   Skills
                      1.   Imagine you are building an obstacle-avoiding robot. Which sensors, motors, and control system would you
                         select, and why?
                      2.   A packaging factory needs a robotic arm to place boxes with high precision. Suggest the electrical and control
                         components you would integrate, justifying your design.

                                                              FEEDBACK OR NO FEEDBACK?

                    Think of two real-life examples: one with feedback (AC thermostat) and one without (toaster).
                    Act them out with a partner.

                    Observe the difference in accuracy and reliability. Lesson: Feedback ensures precision and control in robotic systems.

                  140
                  Touchpad Robotics - XI

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