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Grade: Upto college level

                        

a thin metallic spherical shell contains a charge Q on it. a point charge q is placed at de centre of de shell and another charge q" is placed outside it. all de 3 charges r +ve.wat is de force on de charge at de centre?wat is de force on de central charge due to de shell ?

9 years ago

Answers : (5)

AKASH GOYAL AskiitiansExpert-IITD
419 Points
							

Dear Nandan

This is the concept of electrostatic shielding. Electric field lines can not penetrate the mettalic shell and net force on charge q is zero.

Force on q due to q" will be towards left and for the net force to be zero the force by shell will be towards left but magnitude can not be calculated as distances are not given.

All the best.                                                           

AKASH GOYAL

AskiitiansExpert-IIT Delhi

 

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9 years ago
vikas askiitian expert
509 Points
							

force on the charge at cetrer = force bw shell & charge + force bw charge & charge

electric field inside a spherical shell is 0 , so F = qE = 0 

force due to shell on charge at center is 0 ...

net force = force bw two charges = kq2/r2

force due to shel = 0

9 years ago
mathew jacob
16 Points
							

force is 0

as the resultant force exp by q due to the shell is 0 as electric feild due to the shell is 0 inside the shell 

now due to electrostatic sheilding of the shell electric feild due to q'' is sheilded and hence the force on q due to q'' is also 0

thank you

9 years ago
Krish Gupta
askIITians Faculty
76 Points
							This is a very trivial question and asked by

Hello Nandan,

This is the concept of electrostatic shielding. Electric field lines can not penetrate the mettalic shell and net force on charge q is zero.

Force on q due to q" will be towards left and for the net force to be zero the force by shell will be towards left but magnitude can not be calculated as distances are not given.

All the best.                                                           

Krish Gupta

AskiitiansExpert-IIT 

 

Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.

Hope it clears the doubt and I hope it gets approval.

4 months ago
ankit singh
askIITians Faculty
596 Points
							

The charge of q1 outside the shell is positive and the metal is observed to be in a spherical shape. A negative charge is produced as a result of the induced positive charge from outside. Always an electric field will be zero inside the shell and electrons will move if and only of the electric force is applied. The movement of electrons gets stopped when the electric field comes in from different directions. Thus the electric field becomes zero. So there will not any force on q.

3 months ago
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