Your SlideShare is downloading. ×
Transfer Of Charge
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Saving this for later?

Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime - even offline.

Text the download link to your phone

Standard text messaging rates apply

Transfer Of Charge

16,951
views

Published on

This is a basic introduction to charging processes. It has some nice electroscope animations that I spent a lot of time creating. …

This is a basic introduction to charging processes. It has some nice electroscope animations that I spent a lot of time creating.

Please comment if you would like to see more of my physics PowerPoints - especially if you have specific requests!


7 Comments
1 Like
Statistics
Notes
  • such a very gooooodddddd ppt presentantion
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Such a great powerpoint! I need to learn how to make powerpoint much more interactive and animated like this one. Kudos!
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • Thank you for sharing! May I use this for my presentation? You are fully credited. =)
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • it really saved my day.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
  • it is fantastic.the dramatization really helped me a lot thanx for sharing.
       Reply 
    Are you sure you want to  Yes  No
    Your message goes here
No Downloads
Views
Total Views
16,951
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
375
Comments
7
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Restless Electrons Mechanisms for Transfer of Charge
  • 2. How do objects gain “static” charge?
    • Friction
      • Rubbing two electrically neutral objects together can charge both objects – both gain OPPOSITE charge
    • Conduction
      • Charged object TOUCHES another object – electrons jump from one to the other in an attempt to EQUALIZE the charge on both objects
    • Induction
      • Charged object comes near another object WITHOUT TOUCHING – causes it to POLARIZE
  • 3. Conductive Properties of Solids Conductors allow charge to flow through them easily high conductivity Insulators inhibit charge flow high resistivity rubber sili con wood pure water metals special metal alloys SUPER CONDUCTORS SEMI INSULATORS CONDUCTORS CONDUCTORS sea water
  • 4. Friction This works best when two INSULATORS are rubbed against one another
  • 5. Conduction Negative To Neutral - - Excess electrons exert repulsive forces on one another, causing them to move apart as much as possible BOTH now have the same charge!
  • 6. Conduction Positive To Neutral + + BOTH now have the same charge! Electrons in the neutral object experience an attractive force. They neutralize some of the positive charge, leaving both with a lack of electrons
  • 7. Induction Negative To Neutral Polarization + - - Excess electrons exert force against nearby electrons in the neutral object
  • 8. Induction Positive To Neutral Polarization + - + Electrons in the neutral object experience an attractive force, which pulls them closer to the charged object
  • 9. Grounding Since the Earth is so large it can equalize charges from other objects very easily The Earth can equalize charge by: absorbing excess electrons from negatively charged objects giving free electrons to positively charged objects In either case, grounding a charged object makes it neutral One symbol that is often used to show that something is grounded is:
  • 10. Electroscope - - - - - - - An electroscope is a device that detects CHARGE When the scope is CHARGED , the LEAVES at the bottom will REPEL one another The charged LEAVES exert force on one another, forcing them apart
  • 11. Electroscope – negative cond. - - - - - - - Step 1 Negative rod touches neutral scope Step 2 Electrons spread out and charge plates Step 3 Scope is now negatively charged Step 4 Scope is grounded allowing electrons to escape Step 5 Scope is once again neutral – excess electrons are gone
  • 12. Electroscope – positive cond. + + + + - - - - - - Step 1 Positive rod touches neutral scope Step 2 Electrons leave scope because they are attracted to the positive rod Step 3 Scope is now positively charged Step 4 Scope is grounded – electrons from the ground are attracted to the positive scope Step 5 Scope is once again neutral – balanced charge is restored
  • 13. Electroscope – negative ind. - + - - Step 1 Negative rod brought near grounded scope Step 2 Scope polarizes as electrons at the top try to move away from the charged rod. Step 3 Rod is removed – electrons are attracted back to the top and “re-neutralize” the electroscope.
  • 14. Electroscope – positive induction + - - Step 1 Positive rod is brought near neutral electroscope Step 2 Electrons from the bottom of the electroscope are attracted to the positive rod – get pulled up. The leaves get a positive charge on them. Step 3 Rod is removed. Electrons are attracted back into the leaves by the protons, making the electroscope neutral again. + +
  • 15. Electroscope – ind. with ground - + - + + - - Step 1 Negative rod brought near grounded scope Step 2 Excess electrons from the rod force electrons from the scope into the ground. Step 3 Ground is removed while the rod is still nearby, keeping electrons from re-entering the scope Step 4 Scope now has a charge that is opposite to the charge on the rod Step 5 The rod is taken away and the positive charge remains on the scope
  • 16. Electroscope – ind. with ground + - - - Step 1 Positive rod is brought near grounded scope Step 2 Electrons from the ground are attracted to the positive rod Step 3 Ground is removed, while the rod is still nearby, pulling on electrons and keeping them from escaping Step 4 Scope is now negatively charged – the opposite charge as that of the rod Step 5 Rod is taken away and the negative charge remains on the scope