Question

State the sign of the charge acquired by an object when it is charged by a positively charged rod through (a) conduction (b) induction give the reason for your statement

Answer 1

Ia. n a conduction reaction, a positive or a negatively charged rod is kept along with a neutrally charged metal surface. When there is a conduction charging experiment by using a positively charged rod, the positive charge from the rod gets distributed onto the neutral surface of the metal. This is because the electrons from the metal surface get attracted towards the positively charged leaving an overall positive charge on the metal object.

b. In induction experiments, when a neutrally-charged object is kept beside a charged electrode, it acquires its charge. There is no transfer of electrons from the negatively or positively charged objects or electrodes, but the neutral object derives the charge from the electrode which it is touching. So, the object will derive positive charge from the positively charged rod.

Answer 2

(a)conduction

 

Consider the case of a positively charged aluminum plate being used to charge a neutral metal sphere by the process of conduction.