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

if a charged body is brought near a charged electroscope, then

A positively charged body is brought near to bob of an uncharged gold leaf electroscope , then :

When a negatively charged ebonite rod is brought near a negatively charged and freely suspended ball, then the ball :

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 ?

When a negative charged rod is brought near, but does not touch, the initially unchanged electroscope shown below, the leaves spring apart (I) . When the electroscope is then touched with a finger, the leaves collapse (II) . When next the finger and finally the rod are removed, the leaves spring apart a second time (III) . The charge on the leaves is

An uncharged electroscope can tell the nature of charge on a charged body .

Is haemoglobin negatively or positively charged sol?

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 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 ?

A metal sphere is suspended from a nylon thread. Initially, the metal sphere is uncharged. When a positively charged glass rod is brought close to the metal sphere, the sphere is drawn towards the rod. But if the sphere touches the rod, it suddenly flies away from the rod. Explain, why the sphere is first attracted then repelled?