4th quarter lesson 1 for the STEM students.pptx

The lesson wants to deepen the understanding of the learners about the importance of electronics

1. https://www.youtube.com/watch?v=vN9aR2wKv0U

2. Activity 4.1: Picture Analysis Identify which of the home appliances that uses a DC Power Supply or an AC Power Supply? Write AC for the appliances that uses Alternating Current, DC for the appliances that uses Direct Current and your Full Name for the appliances that no need an AC or DC at all.

3. Copy and answer B. Instruction. Encircle the letter of the correct answer. 1. It allows the current to flow in one direction. A. Alternating Current C. both A & B B. Direct Current D. none of these

4. 2. It refers to the voltage or current that changes polarity or direction, respectively, over time. Alternating Current C. both A & B B. Direct Current D. none of these

5. 3. Diode A. B. C. D. 4. Transformer A. B. C. D. 5. Capacitor A. B. C. D.

6. 6. It has its primary winding connected to the mains (line) supply. Diode B. Capacitor C. Transformer D. Resistor

7. 7. It conducts only half of each cycle of the AC input wave. Diode B. Capacitor C. Transformer D. Resistor

8. 8. It acts as a temporary storage for the power supply output current. Diode B. Capacitor C. Transformer D. Resistor

9. 9. What is the current stored in a battery? DC AC C. CA D. CD

10. 10. It refers to a component or portion of a circuit that consumes (active) electric power. voltage drop B. load C. voltage spike D. energy saver

11. Objective: Discuss concepts of robotics technology.

12. In direct current (DC), the electric charge (current) only flows in one direction. The electric charge in alternating current (AC) , on the other hand, changes direction periodically. The voltage in AC circuits also periodically reverses because the current changes direction.

13. Parts of an AC/DC Power Supply A DC Power Supply Unit (commonly called a PSU) deriving power from the AC mains (line) supply performs a number of tasks: 1. It changes (in most cases reduces) the level of supply to a value suitable for driving the load circuit. 2. It produces a DC supply from a pure AC wave.

14. 3. It prevents any AC from appearing at the supply output. 4. It will ensure that the output voltage is kept at a constant level, independent of changes in: a. The AC supply voltage at the supply input. b. The Load current drawn from the supply output. c. Temperature.

15. https://www.youtube.com/watch?v=dezTcLc1GKc&t=389s