Electric Shock
Electric Shock Anyone
What Is This Module About?
Nowadays, electrical appliances are commonly seen in every household. In your home, you probably have a television set, a radio, a karaoke player, a VCD player and other electrical appliances. But have you ever wondered how these appliances work? All of these need electricity to work. In this module, you will be introduced to the basic concepts of electricity. You will also learn about its uses. After going through the module, you should be able to explain common electrical phenomena like lightning and the generation of electricity. This module is made up of two lessons: Lesson 1 – Electrostatics Lesson 2 – Electricity
What Will You Learn From This Module?
After studying this module, you should be able to: ♦ ♦ ♦ ♦ ♦ define what an electric charge, an electrostatic force, electricity, a voltage, a current and a resistance are; differentiate a conductor from an insulator and a semiconductor; differentiate a series from a parallel connection; differentiate an alternating current from a direct current; and state the relationship between voltage, current and resistance in a conductor (Ohm’s law).
Let’s See What You Already Know
Before studying this module, take this simple test first to find out how much you already know about the topics in this module. Encircle the letter of the correct answer to each of the following. 1. Which of the following is not true about an electric charge? a. b. c. d. An electric charge is a fundamental quantity that is responsible for all electrical phenomena. An electric charge can have any value. A body has a negative electric charge whenever it has an excess of electrons. Electric charges can neither be created nor destroyed.
1
2.
If the two electrons of a helium atom were removed, what would be its charge? a. b. c. d.
1.6 × 1019 C 3.2 × 10 C − 1.6 × 1019 C
−19
− 3.2 × 10 −19 C
3.
Three equally-charged bodies were hung and the interaction is depicted in
What Is This Module About?
Nowadays, electrical appliances are commonly seen in every household. In your home, you probably have a television set, a radio, a karaoke player, a VCD player and other electrical appliances. But have you ever wondered how these appliances work? All of these need electricity to work. In this module, you will be introduced to the basic concepts of electricity. You will also learn about its uses. After going through the module, you should be able to explain common electrical phenomena like lightning and the generation of electricity. This module is made up of two lessons: Lesson 1 – Electrostatics Lesson 2 – Electricity
What Will You Learn From This Module?
After studying this module, you should be able to: ♦ ♦ ♦ ♦ ♦ define what an electric charge, an electrostatic force, electricity, a voltage, a current and a resistance are; differentiate a conductor from an insulator and a semiconductor; differentiate a series from a parallel connection; differentiate an alternating current from a direct current; and state the relationship between voltage, current and resistance in a conductor (Ohm’s law).
Let’s See What You Already Know
Before studying this module, take this simple test first to find out how much you already know about the topics in this module. Encircle the letter of the correct answer to each of the following. 1. Which of the following is not true about an electric charge? a. b. c. d. An electric charge is a fundamental quantity that is responsible for all electrical phenomena. An electric charge can have any value. A body has a negative electric charge whenever it has an excess of electrons. Electric charges can neither be created nor destroyed.
1
2.
If the two electrons of a helium atom were removed, what would be its charge? a. b. c. d.
1.6 × 1019 C 3.2 × 10 C − 1.6 × 1019 C
−19
− 3.2 × 10 −19 C
3.
Three equally-charged bodies were hung and the interaction is depicted in
References: Gates, Earl D. Basic Electronics. 2nd ed. New York: Delmar Publishers, Inc., 1994. Hewitt, Paul G. Conceptual Physics. 7th ed. New York: Harper Collins College Publishers, 1993. 29