KVPY2017PhysicsElectrostatics
If some charge is given to a solid metallic sphere, the field inside remains zero and by Gauss's law all the charge resides on the surface. Suppose now that Colomb's force between two charges varies as 1 / r ³ . Then, for a charged solid metallic sphere
Options
- Afield inside will be zero and charge density inside will be zero.
- Bfield inside will not be zero and charge density inside will not be zero.
- Cfield inside will not be zero and charge density inside will be zero.
- Dfield inside will be zero and charge density inside will not be zero.
Correct answer
D. field inside will be zero and charge density inside will not be zero.
Step-by-step solution
If coloumb's force 1 r ³ gauss's law is not valid q _ en ₀ For static condition E =0 in both of conductor through a Gaussian surface just under the surface of conductor =0 but as = q _ en ₀ is not valid So q _ en =0 is not correct statement. Some charge will present insider bulk of conductor.