ICSE ICSE Class 8 - CISCE Question Bank Solutions for Physics

Name the way of charging a conductor in which the charge is shared.

Describe the method of charging a conductor by conduction.

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.

Describe the method of charging a conductor by induction.

Explain the charging by induction in terms of movement of electrons.

Figure below shows a metal rod AB placed on an insulating stand.

In figure (a) a negatively charged ebonite rod C is touched with the metal rod AB, while in figure (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.

Can you charge an insulator by the method of conduction?

What is an electroscope?

Describe a pith ball electroscope. how can you use it to test whether a body is charged or uncharged?

Name the two types of electroscopes.

How will you use a pith ball electroscope to find out whether the charge on a charged body is positive or negative?

Draw a labelled diagram of a gold leaf electroscope and describe its construction.

A positively charged glass rod is touched with the disc of an uncharged gold leaf electroscope. What will be your observation?

How will you use a gold leaf electroscope to find out whether a body is charged or uncharged?

How will you use a gold leaf electroscope to find out whether the charge on a charged body is positive or negative?

A negatively charged ebonite rod is touched with the disc of a negatively charged gold leaf electroscope. What will be your observation?

When a charged rod is touched with the disc of a positively charged gold-leaf electroscope, it is observed that the divergence of leaves decreases. What is the kind of charge on the rod?

Describe Franklin’s experiment. What did he conclude from his experiment?

What causes lightning?