Question

Which of the following statements about charging by conduction is FALSE? Check all that apply...

a. A negatively-charged rabbit fur and positively-charged human skin will result when rubbed together. In contrast, a positively-charged rabbit fur and negatively-charged human hair will result when rubbed together. Note that rubbing a metal pipe with rabbit fur can also transfer electrons, but these electrons will immediately pass through the conductor to the experimenter and then to the Earth.
b. In charging by conduction, charging by contact differs from charging by friction where only one physical contact point is needed instead of the entire rubbing surface, the neutral uncharged objects can be either insulators or conductors, one object is already charged instead of beginning with two neutral objects, and both objects have the same charge afterward instead of having opposite charges.
c. Charging by contact occurs when a negatively-charged ebonite rod touches a neutral object to remove electrons from the neutral object so that it becomes negatively-charged or occurs when a positively-charged glass rod touches a neutral object to transfer electrons to the neutral object so that it becomes positively-charged.
d. Charging by friction occurs when two, different, neutral, solid or liquid, insulators such as silk and wool are rubbed together where silk has a weaker hold on electrons will lose electrons and become positively-charged while wool has a stronger hold on electrons will gain electrons and become negatively-charged.

Answer 1

The false statements about charging by conduction pertain to misunderstandings of how charged materials interact, especially in the case of conductors where electrons are transferred and do not accumulate as they would on insulating materials.

Step-by-step explanation:

The question asks which of the provided statements about charging by conduction is FALSE. After analyzing the options, we can determine the correct answer.

The first statement (a) is indeed false, as when you rub a material such as rabbit fur against another material, such as human skin or metal, electrons are transferred, resulting in opposite charges on the materials; additionally, in the case of a conductor like a metal pipe, electrons won't accumulate on it but rather move through the conductor to the experimenter and potentially the Earth if grounded.

Statement (b) describes charging by contact accurately by contrasting it with charging by friction; hence, it is not false.

Statement (c) is true since a negatively charged object will remove electrons from a neutral one upon contact, and a positively charged object will transfer electrons to the neutral object, leading to similar charges on both objects.

Lastly, statement (d) accurately describes charging by friction, where rubbing two different materials together causes electrons to move from one material to the other due to differences in electron affinity, so it is also true.