question

a metal sphere is kept on an insulating stand. a negatively charged rod is brought near it, then the sphere is earthed as shown. on removing the earthing, and taking the negatively charged rod away, what will be the nature of charge on the sphere ? give reason for your answer.

 

 

 

 

 

 

on removing the earthing and taking the negatively charged rod away then spheres will be positively charged due to the electrostatic induction.