How Do You Calculate Charge from Electric Field in Electrostatics?

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Homework Help Overview

The discussion revolves around calculating charge from an electric field in the context of electrostatics, specifically involving an isolated metal sphere with a given diameter and electric field threshold for sparking.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to relate the electric field to charge using known equations but expresses uncertainty about the calculation process. Some participants suggest using Coulomb's law, while others question the need for independent research on related topics.

Discussion Status

The discussion is ongoing, with participants exploring different aspects of the problem. Guidance has been offered regarding the use of Coulomb's law, but there is no explicit consensus on the approach to take for calculating the charge from the electric field.

Contextual Notes

Participants are navigating the constraints of the problem, including the specific electric field value that leads to sparking and the implications of the sphere's geometry on charge distribution.

nisha
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we meet again .. here ,i have a question about electrostaatics...
in a particular experiment, a high voltage is created by charging an isolated metal sphere,the sphere has diameter 42 cm and any charge on its surface may be considered as if it were concentrated at its centre. The air surrounding the sphere loses its insulating properties, causing a spark, when the electric field exceeds 20kvcm-1... Calculate the charge on the sphere and its potential,
i know this question involving the equation v=Q/4pi(permittivity of free space)r but how to calculate the charge if we are given electric field?need help...
 
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Use Coulomb's law.
 
hello.. tell me more about quantum physics and photoelectric effect.. Is x-ray one of application of photoelectric effects...
 
Why don't you try doing a bit of research about it on your own first? If you have a specific question, we'd be more than happy to answer that, but explaining the entire thing from scratch would be like reinventing the wheel.

And x-rays are just electromagnetic waves with a wavelength in a specific range. What do you mean by "application?"

cookiemonster
 

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