The rod and the knob of an electroscope are made of metal.

Give Reason Conducting wires are made of metals.

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 ?

.Give reason for the following: (a) School bells are made up of metals. (b) Electric wires are made up of copper.

If a body touching the disc of an uncharged gold leaf electroscope makes its leaves .................. we can say that body is charged.

When a glass rod rubbed with silk is brough near the knob of a positively charged gold leaf electroscope , the gold leaves

When a negatively charged ebonite rod is brought close to an uncharged electroscope, the leaves of the electroscope develop positive charge and diverge.

A glass rod rubbed with silk is used to charge a gold leaf electroscope and the leaves are observed to diverge. The electroscope thus charged is exposed to X -rays for a short period. Then

A metallic rod of length l and cross-sectional area A is made of a material of Young's modulus Y. If the rod is elongated by an amount y,then the work done is proportional to

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 ?

An electroscope is given a positive charge, causing its foil leaves to separate. When an object is brought near the top plate of the electroscope, the fiols separated even further. We conclude.