| Category | Format | Size |
|---|---|---|
| Beijing Normal University Ninth Grade Physics Volume 1 | pptx | 6 MB |
"Charge" Simple Circuit PPT Courseware 5
Description
"Charge" Simple Circuit PPT Courseware 5
Small experiment:
Use a plastic ruler, rub the penholder with your hair, and then move it closer to the scraps of paper to observe the phenomenon.
charge
When an object has the property of attracting light and small objects, we say that the object is "electric", or charged.
The phenomenon of electrifying objects by friction is called triboelectricity.
interaction between charges
Think about it: Do objects have the same charge?
Reading material:
Through a large number of experimental studies, people have discovered that various materials can be charged using friction. If a charged object is attracted to a glass rod rubbed with silk, it will repel each other with a rubber rod rubbed with fur. If a charged object is attracted to a rubber rod rubbed with fur, it will be repelled with a glass rod rubbed with silk.
A large number of facts make people realize that there are only two kinds of electric charges in nature.
The charge on a glass rod rubbed against silk is called a positive charge;
The charge on a rubber rod that rubs against fur is called a negative charge.
1. Use a glass rod rubbed with silk to get close to the light ball. If the ball is attracted, the ball is ( )
A. Positively charged B. Negatively charged
C. Uncharged D. May be negatively charged or uncharged
2. Use silk thread to hang three grass balls. If any two of them are attracted to each other when they are close, they may be ( )
A. Two are positively charged and one is negatively charged.
B. Two are negatively charged and one is positively charged.
C. Two are positively charged and one is uncharged.
D. Two are charged with different types of electricity, and one is uncharged.
charge
The amount of charge an object carries is called charge
Unit: Coulomb
Abbreviation: library
Symbol: C
The charge carried by a rubbed glass or rubber rod is only about 10-7C. The electric charge of a thunderstorm cloud is about tens of coulombs. In contrast, 1C is the charge of approximately 10 7 glass rods.
Atomic structure
The amount of charge carried by an electron is the smallest, which is called the element charge and is represented by the symbol "e".
1e=1.6×10-19C
Under normal circumstances, the number of positive charges carried by the nucleus is equal to the total number of negative charges carried by all electrons outside the nucleus. The entire atom is neutral, that is, the atom does not appear to be charged to the outside.
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For more information about the "Simple Circuit Charge" PPT courseware, please click on the "Simple Circuit ppt Charge ppt" tab.
"Charge and Current" PPT courseware:
"Charge and Current" PPT courseware Part 1: Do it and think about it Ask students to use a plastic pen or plastic comb to rub hard on their hair or clothes, and then move closer to the scraps of paper. Phenomenon seen: Rubbed plastic ruler attracts paper scraps. This is..
"Charge and Current" PPT:
"Charge and Current" PPT Part One: Introduction to Life Have you ever seen the occurrence of static electricity in your life? Static electricity is discharged when dressing in dry weather in winter. Static electricity is discharged by touching metal with dry hands. Rub a plastic pen (or ruler) with your hair, and then move it close to a small piece of paper.
"Charge Triboelectricity" Current and Circuit PPT Courseware 4:
"Charge Triboelectricity" Current and Circuit PPT Courseware 4 Static Electricity Phenomenon Observation and Experiment Triboelectricity Rub a plastic comb, plastic ruler or plastic penholder with the hair, and then bring it close to the scraps of paper to observe the phenomenon. Phenomenon: Rubbed combs and rulers can attract debris...
File Info
Update Time: 2024-06-30
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