What charge does the belt end up with after friction with the bottom roller?

As the drive roller turns, by friction it charges the inside of the belt positive, which induces a negative charge on the bottom comb, which is grounded. The comb then sprays electrons onto the outside surface of the belt by means of corona discharge (see 56.54 — Lightning rod), giving it a negative charge.

What charge does a Van de Graaff generator produce?

Most Van de Graaff generators build up a positive electric charge on their domes by separating negative electric charge from positive electric charge. This is accomplished by a rotating insulated belt. When two different materials are rubbed together, one object takes away electrons from the other object.

How is charge acquired when two neutral objects are rubbed together?

When two different materials are rubbed together, there is a transfer of electrons from one material to the other material. This causes one object to become positively charged (the electron loser) and the other object to become negatively charged (the electron gainer).

Can a body attract a similar charged body in any case?

Yes, this is possible. But as we know that like charged body repels each other whereas unlike charged body attracts attracts each other is not false. induced charge on the other exceeds the force of repulsion between q 1 and q 2 . Hence there is only one case when like charged body attract each other.

Is attraction a true test of electrification?

No. The attraction between two bodies can also be observed when one body is charged and other is uncharged because of induced charge on the uncharged body.

What happens to the weight of a body when it is charged negatively?

Negative charge: when electrons gained, the body developed negative charge. The mass of the electrons is almost negligible. Thus, the mass of the body remains unaffected while charging or discharging the body. Correct option is C.

When a body becomes negatively charged by rubbing it means that it has?

We know that when a body gains electrons, the body becomes negatively charged and when a body leaves electrons, the body becomes positively charged. As the body is negatively charged so it has acquired excess of electrons.

When a body is charged its mass increases or decreases?

When a body is charged, electrons are added or reduced to the body. Each electrons have mass. So, mass of body may increase of decrease.

What is the origin of frictional electricity?

Answer. The substances which acquire charges on rubbing are said to be ‘electrified’ or charged. These terms are derived from the Greek word elektron, meaning amber. The electricity produced by friction is called frictional electricity.