Why do some appliances produce more heat than the others? Most appliances with high power rating are heating appliances.The heating appliances has a heating element like resistors. The resistorsconvert electrical energy into light and thermal energy . It depends on the resistance of material if how much heat can be produced from electricity. Those devices who produced heat, the Nichrome wire is an element who is responsible for heating . when we say nichrome wire , it is an alloy with the combination of nickel and chromium . It has two reasons why it serves as a good producer of heat.
First, Nichrome wire has greater resistivity than the other element like cooper.Second,it does not rust even at high temperature. therefore, when electrons collide with atoms, they make the latter turn and vibrate even faster. In that case more thermal energy may produced.
When the wire resistance is greater,The hotter the object becomes .
heat generated in appliances
I. OBJECTIVESGeneral ObjectiveUnderstand the basic concepts and principles of electricity as used in home circuit connections
Specific Objectives1. Describe how the amount of heat generated in appliances is affected by current in the circuit, resistance of appliances, and duration of using the appliances
2. Explain practical observations related to heating effect of current
3. Cite ways of minimizing heat dissipated in non-heating appliances
II. SUBJECT MATTER
A. Lesson: Heat Generated in Appliances
B. ReferenceMinistry of Education and Culture. (1981). Physics in your environment: High school science IV (1st ed.). Manila: Author.
C. MaterialsMaterials listed in Activity 3.12
III LEARNING ACTIVITIES
1. Ask some or all of the questions to your students:
- What appliances in the home contribute most to your energy consumption?
- If they are used for the same period of time, which three appliances will have the greatest consumption?
- What is