B Can I use this method to charge a metal sphere?

[abdossamad2003]

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?

 

[berkeman]

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:

https://tikz.net/electric_field_image_charge_plane/

 

[Meir Achuz]

This sphere will be charged to the extent Q=VR.

 

[vanhees71]

...in Gaussian units.

 

[berkeman]

...in Gaussian units.

Thank you! I was off in the weeds for a few moments...

 

[abdossamad2003]

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.

 

[berkeman]

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?

 

[abdossamad2003]

What is the difference in voltage for a Van de Graaff generator versus a battery?

The battery voltage can be increased enough to match the voltage produced by the van devGraaff

 

[renormalize]

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?

 

[abdossamad2003]

use elctric converter 220v to 50 kv and use diode this is 50kv DC