When an ebonite rod is rubbed with wool, the rod becomes negatively charged. How?

When the silk is rubbed with glass, the silk gets negatively charged.

When a plastic rod is rubbed with wool, it acquires a negative charge because

When a glass rod is rubbed with silk, it

When an ebonite rod is rubbed with cat's skin, the cat's skin develops a charge which is :

Two bodies are charged by rubbing one against the other. During the process, one becomes positively charged while the other becomes negatively charged. Then

If an object made of substance A is rubbed with an object made of substance B, then A becomes positively charged and B becomes negatively charged. If however, an object made of substance C, then A becomes negatively charged, What will happen if an object made of substance B is rubbed against an object made of substance C? (a) B becomes positively charged and C becomes positively (b) B becomes positively charged and C becomes negatively charged. (c ) B becones negatively charged and C becomes positively charged. (d) B becomes negatively charged and C becomes negatively charged.

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

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

When an atom loses its electrons, it becomes negatively charged and is called a negative ion.

An electrically isolated hollow (initially uncharged), conducting sphere has a small positively charged ball suspended by an insulating rod from its inside surface, see diagram This causes the inner surface of the sphere to become negatively charged. When the ball is centred in the sphere the electric field outside the conducting spehere is