How do you charge a gold leaf electroscope negatively by induction?

How can you charge gold leaf electroscope positively by conduction ?

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

How do you charge an object by conduction?

How do you charge an object by induction?

How can you charge a metal sphere negatively without touching it?

How do you measure work done?

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

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 ?

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

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