ICSE ICSE Class 8 - CISCE Question Bank Solutions

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?

What are the effects of lightning?

What is a lightning conductor? How does it work?

How is a tall building protected from damage due to lightning?

State three safety measures that you will observe in thunder storm.

A coolie does no work against the force of gravity while carrying a luggage on a road.

Water is optically denser than glass.

A ray of light when passes from glass to air, bends towards the normal.

Work done by a boy depends on the time in which he does work.

The speed of light is more in glass than in water.

Power spent by a body depends on the time for which it does work.

Work is said to be done by a forte only when ................

The depth of a pond when seen from above appears to be less.