ELECTROSTATICS GR12 by Lizelle Swanepoel https://padlet.com/lizellexs/2htaivnwqdl2 en-us 2019-06-11 12:37:26 UTC 2023-05-14 08:39:26 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Bigthunderstorm.png QUANTISATION OF CHARGE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/367584967 2019-06-14 11:32:36 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/367584967 THE CHARGE ON AN ELECTRON lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/367585190 The elementary charge, usually denoted by e or sometimes qe, is the electric charge carried by a single electron.]]> 2019-06-14 11:34:33 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/367585190 CHARGE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/368090872 2019-06-18 10:49:49 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/368090872 POLARIZATION OF CHARGE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/368091091 POLARISATION = It is the process of a charged object to induce electron movement or electron rearrangement.]]> 2019-06-18 10:51:08 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/368091091 COULOMB'S LAW lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/368091379 2019-06-18 10:53:00 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/368091379 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/398336087 Discharging an electroscope ]]> 2019-10-16 08:09:38 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/398336087 DEVICES USED TO STUDY CHARGE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/398338449 2019-10-16 08:17:26 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/398338449 Wimshurst machine lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/398340482 2019-10-16 08:23:41 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/398340482 Van de Graaff generator lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/398341452 2019-10-16 08:26:21 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/398341452 COULOMB'S LAW lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/398342532 2019-10-16 08:30:00 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/398342532 COULOMB'S EXPERIMENT lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/398343073 2019-10-16 08:31:43 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/398343073 NET FORCE BETWEEN THREE POINT CHARGES lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/399468894
EXAMPLE 1:
The following three charges with distances apart are given:

]]> 2019-10-18 11:27:38 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/399468894 Calculate the net force on q1 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/399469217
Solution:]]> 2019-10-18 11:29:04 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/399469217 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/399469475 2019-10-18 11:30:18 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/399469475 EXAMPLE 2 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/399469987 Calculate the net force on the red charge.]]> 2019-10-18 11:32:33 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/399469987 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/592835763 2020-05-25 12:16:24 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/592835763 PRINCIPLE OF CONSERVATION OF CHARGE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593229258 The principle of conservation of charge states:
The net charge of an isolated system remains constant during any physical process (e.g. two charged objects making contact and separating).]]> 2020-05-25 16:11:31 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593229258 CHARGE ON INSULATORS VS CONDUCTORS lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593297894
  • Metals are good conductors, so charge is free to move around in and on it. 
  • Insulators (e.g. plastic and rubber) don't allow electric charges to move through them.
    • ]]>     2020-05-25 16:51:38 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593297894     ELECTRIC CHARGE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593305112 2020-05-25 16:56:29 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593305112 TRIBOELECTRIC SERIES lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593310437 2020-05-25 16:59:47 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593310437 HOW THE VAN DE GRAAFF GENERATOR WORKS lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593318493 2020-05-25 17:05:00 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593318493 ROBERT VAN DE GRAAFF (1901 – 1967) lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593323242 He was a Dutch-American physicist, noted for his design and construction of high-voltage Van de Graaff generators.]]> 2020-05-25 17:08:12 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593323242 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593331716 2020-05-25 17:14:01 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593331716 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593332209 2020-05-25 17:14:20 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593332209 REGULAR VS IRREGULAR SHAPED CONDUCTORS lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593340350 EVEN VS UNEVEN SPREAD OF CHARGE:]]> 2020-05-25 17:19:51 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593340350 SHARING OF CHARGE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593346219 2020-05-25 17:23:48 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593346219 ELECTROSTATICS lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593348655 2020-05-25 17:25:35 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593348655 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593353068 2020-05-25 17:28:48 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593353068 PROBLEM: CHARGE ON CONDUCTING SPHERES AFTER TOUCHING AND SEPARATION lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593361832 2020-05-25 17:34:43 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593361832 INTRO QUESTIONS lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593388405 2020-05-25 17:52:49 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593388405 GROUNDING AN ELECTROSCOPE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/593395103 The grounding process involves: 
    • A transfer of electrons between the charged electroscope and the conducting object to which it is touched. 
    • When a negatively charged electroscope is touched, electrons exit the electroscope to the ground.
    • When a positively charged electroscope is touched, electrons enter the electroscope from the ground.
    ]]>     2020-05-25 17:57:33 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/593395103     POLARIZED WATER STREAM INTERACTS WITH CHARGED OBJECTS lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/597794943 2020-05-27 20:07:01 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/597794943 ELECTROSTATIC FORCE FALLS OFF WITH DISTANCE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/597805848 2020-05-27 20:13:42 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/597805848 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/655819626 2020-07-16 07:03:48 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/655819626 FIELDS QUESTION lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/655821692 2020-07-16 07:07:45 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/655821692 FIELDS QUESTION lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/655821696 2020-07-16 07:07:46 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/655821696 FIELDS MEMO lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/655821811 2020-07-16 07:07:58 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/655821811 ELECTROSTATICS IN ACTION - BUILD YOUR OWN PARTICLE ACCELERATOR lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/662317862 2020-07-25 10:29:11 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/662317862 ANSWERS TO NOTES lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/827649684 2020-10-14 06:14:57 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/827649684 EXERCISE lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/827738479 2020-10-14 06:57:23 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/827738479 HOW IS STATIC CHARGE GENERATED? https://padlet.com/lizellexs/2htaivnwqdl2/wish/1749094440 2021-09-17 16:05:19 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/1749094440 JOHN TRAVOLTAGE - HOW IS STATIC CHARGE GENERATED? https://padlet.com/lizellexs/2htaivnwqdl2/wish/1749099844 2021-09-17 16:07:43 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/1749099844 ELECTRIC FIELD LINES AROUND EQUIVALENT CHARGES ARE ALWAYS SYMMETRICAL lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360967163 2022-10-28 17:53:27 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360967163 UNSYMMETRICAL ELECTRIC FIELD BETWEEN NON-EQUIVALENT CHARGES lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360967610 The bigger charge exerts the greater force - "pushes further"]]> 2022-10-28 17:53:50 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360967610 lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360967998 2022-10-28 17:54:06 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360967998 COMPARE THE STRENGTH OF THE BLUE AND RED CHARGES RELATIVE TO EACH OTHER: lizellexs https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360968341 2022-10-28 17:54:24 UTC https://padlet.com/lizellexs/2htaivnwqdl2/wish/2360968341