Physics G12 - Chapter 1 - Static Electricity - 2024 PDF

Physics-G12 General Presented by: Ms. Nihal Nayel Salamah Bint Butti School Physics Department Physics G12 General Term 1 Stream Week 1 Salamah Bint Butti School  Happy New Academic Year 2024-2025 Academ...

Physics-G12 General Presented by: Ms. Nihal Nayel Salamah Bint Butti School Physics Department Physics G12 General Term 1 Stream Week 1 Salamah Bint Butti School  Happy New Academic Year 2024-2025 Academic Year 2021/2022– Term 1 Something else!.................. Cyber Security advice Cyber Security advice Always bring with you:  Physics Copybook  Physics student’s book  Pen or pencil + Calculator Activity https://quizizz.com/join/quiz/5e7697cd77 7018001f9df307/start https://quizizz.com/join/game/U2FsdGVkX 190oN71pW2y9CVldRY8yCkczCOPPVVpsd IU2TGew0aN4olFIafffs1h6CfdSJVDwCPcb MLeYf0cHg%253D%253D?gameType=sol o Activity Roll The Dice Break The Ice Physics-G12 General Presented by: Mrs. Nihal Nayel Salamah Bint Butti School Physics Department Salamah Bint Butti School  ‫مدرسة سالمة بنت بطي للتعليم ‪Salamah bint buti School-‬‬ ‫الثانوي‬ ‫نصيحة في األمــــــــــن‬ ‫الـــسيبرانــي ‪Cyber Security advice‬‬ ‫تغــــــير‬ ‫عدم مشاركة‬ ‫جعل كلمة‬ ‫كلـــمة‬ ‫كلمة المرور‬ ‫المرور من‬ ‫المرور‬ ‫مع اآلخرين‬ ‫الصعب‬ ‫باستمـرار‬ ‫تـخــمينــــها‬  Physics G12- General Term 1 Chapter1 Static Electricity Section 1.1  Lesson procedures  Objectives… What we will learn? By the end of this chapter student should be able to: Understand the meaning of charge. Recognize the Electrostatic Force. Studying the properties of  In this chapter, you will investigate electrostatics, the study of electric charges that can be collected and held in one place.  Electrostatics is the study of static electricity. Watch this https://www.youtube.com/watch?v=3aB6TyhaSsQ&t=10s& ab_channel=It%27sAumSumTime  Activity https://www.youtube.com/watch?v=ViZN gU-Yt-Y&ab_channel=brusspup https://phet.colorado.edu/sims/html/john-travolta ge/latest/john-travoltage_en.html https://phet.colorado.edu/sims/html/balloons-and-static -electricity/latest/balloons-and-static-electricity_en.htm l Electrostatic force Have you ever noticed that on a dry day your hair is attracted to your comb after you comb it?  Perhaps you have noticed that socks sometimes stick together when you take them out of a clothes dryer. You might also recognize what happens after you rub a balloon on As shown in Figure 1. There must be a strong force pulling upward on the hair because it overcomes the gravitational force pulling downward on the hair. The balloon produces an electrostatic force on the hair that is greater than the gravitational force from Earth. Properties of charges…  Two objects with like charges always repel each other.  Unlike charges attract. Activity https:// www.physicsclassroo m.com/Physics- Interactives/Static- Electricity/Aluminum- Can-Polarization/ Aluminum-Can- Polarization- Electric charges exist within atoms. In 1897 J.J. Thomson discovered that all materials contain low mass, negatively charged particles. These particle are called electrons. Between 1909 and 1911, Ernest Rutherford, who had earlier worked as Thomson's assistant, discovered that the atom has a massive, positively charged nucleus surrounded by a cloud of orbiting electrons. https://www.youtube.com/watch?v=lLwn Watch ACfo7hY&ab_channel this =amritacreate For a neutral object, the amount of negative charge exactly balances the amount of positive charge.  Activity https://phet.colorado.edu/sims/html/john-travoltage/latest/joh n-travoltage_en.html Conductors and Insulators Watch this https://www.youtub e.com/watch?v=HJdJ 4BgX6mw&ab_chan nel=NakulGarg Some nonmetal materials also are good conductors. These include plasma, which consists of negative electrons and positive ions, and graphite.  Critical Thinking 1) why are electrical wires coated with rubber? 2) Explain why metals are good conductors of electric charge.  Critical Thinking 3- Conservation of Charge An apple contains trillions of charged particles. Why don’t two apples repel each other when they are brought together? Critical Thinking Conservation of Charge An apple contains trillions of charged particles. Why don’t two apples repel each other when they are brought together? Each apple contains an equal number of positive and negative charges, so they appear neutral to each other. Chapter 1 Static Electricity Section 2 ELECTROSTATIC FORCE   Define Elementary Charge and its Unit. Learning Objectives  Demonstrate Electrostatic Force Depends upon Distance Between Two charges. Warm Up … https://www.youtube.com/watch?v=C UXnL-kMZeM&ab_channel=ScienceSir https://www.youtube.com/watch?v=3 qyeQO1guKk&ab_channel=ThomasKi m https://www.youtube.com/watch?v=6 1gr7vAkVAA&ab_channel=d%27Artof Science An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. Charging by conduction Scientists call charging a neutral object by touching that object with a charged object charging by conduction. Lightning Charging by induction The process of charging a neutral object by bringing a charged object near it is called charging by induction. https://www.youtube.c om/watch?v=N-Wofq4 Jz2M&ab_channel=Ph ysierge  Grounding is the process of removing the excess charge on an object by connecting it to Earth. Unit-1 LESSON NAME: COULOMB’S LAW  Introducing Coulomb’s Law Learning with Example. Objective s Use of Coulomb's law in Problem Solving.  Coulomb’s Law  According to Coulomb’s law, the magnitude of the force between two point charges (qA and qB) a distance r apart can be written as follows: qA qB Coulomb’s Law F K r2  The symbol k is a proportionality constant known  as the Coulomb's law constant.  The value of this constant is dependent upon the medium that the charged objects are immersed in.  In the case of air, the value is approximately 9.0 x 109 Nm2 / C2. Notes: -Force depends on distance -Force depends on charge Exercis e “5 min”  COULOMB’S LAW Coulomb’s Law gives the magnitude of this force as - Learning outcome #2 State coulomb’s law Where, q1 and q2 are electric charges is the distance between them is a Coulomb’s constant.  CHECK YOUR UNDERSTANDING - Learning If the force between the two charges are 60N, outcome #3 how the force if the distance is reduced by third and the two charges remain constant? Calculate the electrostatic solution: force between Use inversely proportionality relationship Known point charges F1= 60N r1 =r r2 = (1/3 )r required =60 / (1/9) = 540N F2=? - Learning outcome Check your understanding #3 Calculate the electrostatic force The electrostatic force between and is between point 60N. If the charges are kept at the same charges distance, what happens to the force between them if increased by 3 of its magnitude? Solution : Use directly proportionality Known F1= 60N relationship q1 =q q1 =3q required F2=? = 60x3 = 90N - Learning outcome #3 Calculate the electrostatic force Additional Problem between point charges  Exit Ticket A piece of Styrofoam has a charge of -0.004 C and is placed 3.0 m from a piece of salt with a charge of -0.003 C. How much electrostatic force is produced? Login to LMS  Proble m Page. 16 \ Q9 - Learning outcome #3 Calculate the electrostatic force between point charges H. W. on LMS Solution: Thank you 