Question

you are provided with a positively charged metallic sphere and uncharged metallic rod. explain how can you get a negatively charged metallic rod

Answer 1

a  positively charged rod is brought near one of them, attracting negative charge to that side, leaving the othersphere positively charged. This is an example of induced polarization of neutral objects. ... (a) Two unchargedor neutral metal spheres are in contact with each other but insulated from the rest of the world.