Question

A positively charged metal sphere P is connected to a neutral metal sphere Q.
Choose the correct statements.
(i) Electrons will flow from Q to P.
(ii) Protons will flow from Q to P.
(iii) Electron flow will stop when both P and Q will be negatively charged.
(iv) Electron flow will stop when both P and Q acquire the same charges.

• A. (i) and (iii) only
• B. (ii) and (iii) only
• C. (ii) and (iv) only
• D. (i) and (iv) only

Answer 1

The correct option is D (i) and (iv) only

When we join two charged conductors such as metal spheres, then, the electrons flow from the conductor having more electrons to the conductor having fewer electrons.
Here, P is positively charged, which means it has fewer electrons and more protons. So, the electrons will flow from Q to P.
Also, the movement of electrons stops, when the number of electrons in both the conductors becomes equal or they acquire the same charges. The overall charges on P and Q will be positive as the overall charges will be the sum of charges on P and Q.