What is an electroscope ? Draw a neat diagram of gold leaf electroscope .

Draw a neat diagram for NaCl structure.

Draw a neat diagram of digestive system of frog.

A negatively charged rod is held close to the disc of a neutral gold leaf electroscope. What kind of charge is produced on the disc gold leaves ?

Draw a neat and labelled diagram of a tooth.

Draw a neat and labelled diagram of a neuron.

Draw a neat labelled diagram of a vernier callipers.

Draw a neat and labelled diagram of a plant cell.

What will happen to the leaves of an electroscope if a positively charged body is brought near (a) An uncharged electroscope ? (b) A positively charged electroscope ? ( c ) A negatively charged electroscope ?

Draw a neat labelled diagram of an animal cell.

Draw a neat labelled diagram of an A.C. generator.