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.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.DEFLECTION TUBE Deflection tube Cathode/ filament anode Metal plate Fluorescent screen Power supply 6V ac/dc EHT EHT (0 – 5kv) (0 – 5kv) +.Characteristic : travel in straight line, caused fluorescent effect, has energy and momentum Cathode ray.The producing of charges on the surface of a metal because of the heating effect is known as thermionic transmission When heated, these electrons received enough energy to be transmitted on the metal surface. At room temperature these electrons cannot escape from its surface. (c)The Mechanism of Thermionic transmission METAL consists a lot of free electrons.Fluorescent effect on screen display by several electrical appliances Cathode rays Idea of the thermionic emission.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.Suggested answer: Yes if it is an insulatored wire No if it is a bare wire (not insulatored) Key word : short circuit A wire is made into a coil does it has the same resistance? Coil / solenoid Explain your answer.When metal is heated its release electrons to its surface This is known as thermionic emission Electrons, e. Metal : atomic structure They posses a lot of free electron on the surface as a reason of their behavioral as a conductor.
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