Physics
Answer
Suppose we want to charge a metal rod A negatively, proceed as follows:
- Place the rod A on insulating stand.
- Take a positively charged glass rod B provided with an insulating handle.
- Bring it near the rod A.
- The near end P of the metal rod A will acquire negative charge while the far end Q acquires positive charge as shown in below figure.
- Now touch the end Q of rod A by hand. Then remove hand and glass rod B simultaneously.
- The rod A becomes negatively charged.
Related Questions
A metal rod A is to be charged positively by using another charged rod B. What should be the kind of charge on the rod B if charging is to be done by conduction?
Explain the charging by conduction in terms of movement of electrons.
Figure below shows a metal rod AB placed on an insulating stand. In Fig.(a), a negatively charged ebonite rod C is touched with the metal rod AB, while in Fig.(b), the negatively charged ebonite rod C is held near the rod AB. State the kind of charges at the ends A and B of the rod, in each case.
Explain the charging by induction in terms of movement of electrons.