Page 141 - Toucpad robotics C11

2. The function of PWM (Pulse Width Modulation) in motor control is to:
i. Measure distance ii. Adjust motor speed

iii. Store program code iv. Generate electricity
3. A closed-loop control system is superior to open-loop because it:
i. Never requires sensors ii. Uses feedback for accuracy

iii. Consumes less power always iv. Requires no controller
4. Which motor is most suitable for a 3D printer requiring incremental angular movements?
i. DC motor ii. Servo motor

iii. Stepper motor iv. AC induction motor
5. IR sensors primarily detect:

i. Magnetic fields ii. Heat signatures and proximity
iii. Sound waves iv. Water levels
6. Ultrasonic sensors calculate distance using:

i. Infrared light ii. Electromagnetic waves
iii. High-frequency sound waves iv. Magnetic fields

7. Which among the following is an example of a closed-loop control system?
i. Toaster ii. Fan regulator
iii. Air conditioner with thermostat iv. Electric iron without thermostat

8. The device that processes sensor inputs and sends signals to actuators is:
i. Battery ii. Controller
iii. End-effector iv. Gearbox

9. The rotation of a stepper motor is divided into:
i. Infinite steps ii. Continuous cycles
iii. Discrete steps iv. Random pulses

10. A washing machine timer system without sensors is an example of:
i. Closed-loop system ii. Open-loop system

iii. Hybrid system iv. None of these
B. Fill in the blanks.

1. The components that convert electrical signals into physical motion are called .
2. A motor is used in robots for exact angular positioning.
3. Ultrasonic sensors work by emitting and receiving waves.
4. In open-loop systems, there is no signal.

5. PWM stands for .
6. Controllers in robots act as the of the system.
7. A stepper motor rotates in fixed .
8. An IR sensor is often used for detection.
9. Closed-loop systems rely on for correcting errors.

10. A DC motor converts energy into mechanical energy.
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Electrical and Control Systems