2. Metal : atomic structure They posses a lot of free electron on the surface as a reason of their behavioral as a conductor .

3. When metal is heated its release electrons to its surface This is known as thermionic emission Electrons, e

4. A wire is made into a coil does it has the same resistance? Coil / solenoid Explain your answer. Suggested answer: Yes if it is an insulatored wire No if it is a bare wire (not insulatored) Key word : short circuit

5. What will happen when a coil is heated? vacuum What will happen if an anode is placed in the vacuum tube as shown in the above diagram? + e e e e e

6. Fluorescent effect on screen display by several electrical appliances Cathode rays Idea of the thermionic emission

7. (c)The Mechanism of Thermionic transmission METAL consists a lot of free electrons. At room temperature these electrons cannot escape from its surface. When heated, these electrons received enough energy to be transmitted on the metal surface. The producing of charges on the surface of a metal because of the heating effect is known as thermionic transmission

8. Electron gun tube

12. Maltese cross tube Structure

13. Characteristic : travel in straight line, caused fluorescent effect, has energy and momentum Cathode ray

14. Maltese cross tube

15. Tiub Perrin / Deflection tube

17. DEFLECTION TUBE Deflection tube Cathode/ filament anode Metal plate Fluorescent screen Power supply 6V ac/dc EHT EHT (0 – 5kv) (0 – 5kv) + -

20. Perubahan tenaga yang berlaku Tenaga keupayaan elektrik, E = QV Tenaga kinetik , ½ m e v e 2 Tenaga haba + cahaya Tenaga keupayaan elektrik, E = QV Tenaga kinetik , ½ m e v e 2 Tenaga haba + cahaya

21. Tiub sinar katod Tenaga keupayaan elektrik, E = QV Tenaga kinetik , ½ m e v e 2 Tenaga haba + cahaya e iaitu cas bagi satu elektron = 1.6 X 10 -19 C E = eV = ½ m e v e 2 eV = ½ m e v e 2 Prinsip keabadian tenaga

25. 3. Rajah menunjukkan satu bayang palang Maltase pada skrin pendarflour disebabkan oleh alur-alur elektron yang pada arah masuk ke dalam kertas.Jika dua batang magnet diletakkan,ke arah manakah bayang akan beralih .

27. OSCILLOSCOPE CRO

28. CRO Functions Pelbagai bentuk OSK 1. Melihat/mempamerkan bentuk gelombang 2. Sebagai voltmeter 3. Mengukur sela masa yang singkat

29. CRO STRUCTURE

30. The structure of a cathode ray tube

31. Cathode ray tube , CRO

37. 1. Melihat/mempamerkan bentuk gelombang Segi tiga

40. Perbandingan a.t dan a.u. dalam paparan skrin osk Dasar masa di matikan Dasar masa di hidupkan a.t. a.u. a.u. a.t.

49. Osiloskop sinar katod

51. What happens when a coil / wire is heated?