Can I use this method to charge a metal sphere?

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    Charge Metal Sphere
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Discussion Overview

The discussion centers around the feasibility of using a battery to charge a metal sphere, specifically examining the method of connecting the sphere to a battery and grounding it. Participants explore the implications of this method, including comparisons to other charging methods like the Van de Graaff generator.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant questions whether connecting a metal sphere to a battery and grounding it would result in the sphere becoming electrically charged.
  • Another participant asserts that the sphere will indeed become charged and suggests visualizing the electric field lines between the sphere and the ground.
  • There are claims regarding the charge of the sphere being quantified as Q=VR, with some participants noting the use of Gaussian units.
  • Participants express curiosity about why Van de Graaff generators are preferred in laboratories despite the simplicity of the battery method.
  • Questions arise regarding the voltage differences between Van de Graaff generators and batteries, with one participant suggesting that battery voltage can be increased to match that of a Van de Graaff generator.
  • Another participant challenges the practicality of achieving high voltages with batteries, referencing the high output of Van de Graaff generators.
  • A suggestion is made to use an electric converter to achieve high voltage DC from a standard battery setup.

Areas of Agreement / Disagreement

Participants express differing views on the practicality and effectiveness of using a battery to charge a metal sphere compared to using a Van de Graaff generator. There is no consensus on the best method or the feasibility of achieving high voltages with batteries.

Contextual Notes

Some claims regarding voltage and charging methods depend on specific assumptions about the setup and components used, which are not fully detailed in the discussion.

abdossamad2003
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Consider a metal sphere connected to one end of the battery and the other end of the battery to be connected to the ground. Does the metal sphere become electrically charged with this method?
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Yes. It's a little more clear if you draw a ground plane for your "Earth" connection -- when you do that, you can draw the resulting Electric Field lines between the charged sphere and the Earth ground:

1703352068052.png

https://tikz.net/electric_field_image_charge_plane/
 
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This sphere will be charged to the extent Q=VR.
 
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...in Gaussian units.
 
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vanhees71 said:
...in Gaussian units.
Thank you! I was off in the weeds for a few moments... :wink:
 
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Meir Achuz said:
This sphere will be charged to the extent Q=VR.
So why do they use Van de Graaff to get charged in the laboratory when this method is simpler and less expensive.
 
abdossamad2003 said:
So why do they use Van de Graaff to get charged in the laboratory when this method is simpler and less expensive.
What is the difference in voltage for a Van de Graaff generator versus a battery? :wink:
 
berkeman said:
What is the difference in voltage for a Van de Graaff generator versus a battery? :wink:
The battery voltage can be increased enough to match the voltage produced by the van devGraaff
 
abdossamad2003 said:
The battery voltage can be increased enough to match the voltage produced by the van devGraaff
Even a small Van de Graaff generator produces 50,000 volts or more. What kind of practical battery bank are you proposing to achieve that voltage?
 
  • #10
use elctric converter 220v to 50 kv and use diode this is 50kv DC
 

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