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Chapter 14: Q24Q (page 580)

Here is a variant of 鈥渃harging by induction.鈥� Place two uncharged metal objects so as to touch each other, one behind the other. Call them front object and back object. While you hold a charged comb in front of the front object, your partner moves away the back object (handling it through an insulator so as not to discharge it). Now you move the comb away. Explain this process. Use only labeled diagrams in your explanation (no prose!).

Short Answer

Expert verified

The diagram has been drawn below the front sphere will have electron deficiency and the other one will have a greater number of electrons.

Step by step solution

01

Significance of the charging by induction for the objects

Induction charging is referred to as a method that is used for charging a particular object without keeping in contact with any other charged object to the uncharged object.

The induction charging is beneficial for explaining the process.

02

Explanation of the process by the induction charging

Consider three figures for the process of induction charging where the charge redistribution happens in the three figures.

The diagram of the process has been drawn below:

In figure (1), the neutral spheres are shown. The electrons are travelling from the front to the back sphere by point of contact as shown in figure (2). If the spheres are separated, then the electrons will not return to the front sphere as shown in figure (3). Hence, the front sphere will have electron deficiency and the other one will have a greater number of electrons.

Thus, the diagram has been drawn with the front sphere having electron deficiency and the other one will have a greater number of electrons.

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Most popular questions from this chapter

Figure 14.69 shows a neutral, solid piece of metal placed near two points charges. Copy this diagram.

(a) On your diagram, show the polarization of the piece of metal.

(b) Then, at location A inside the solid piece of metal, carefully draw and label three vectors: (1) E鈫�1, the electric field due to -q1; (2) E鈫�2, the electric field due to +q2; (3) E鈫�3, the electric field due to all of the charges on the metal.

(c) Explain briefly why you drew the vectors the way you did.

An electric field of magnitude 190鈥�鈥�N/C is applied to a solution containing chloride ions. The mobility of chloride ions in solution is 7.91脳10-8鈥�鈥�(m/s)/(N/C).What is the average drift speed of the chloride ions in the solution?

Is the following statement true or false? If true, what principle makes it true? If false, give a counterexample or say why. See Figure 14.67.

鈥淭he electric field Epointat the center of an induced dipole, due to the point charge, is equal in magnitude and opposite in direction to the electric field Edipoleat the location of the point charge, due to the induced dipole.鈥�

A carbon atom is composed of 6 protons, 6 neutrons, and 6 electrons. What is the net charge of this atom? A neutral chlorine atom contains 17 protons and 17 electrons. When a chlorine atom gains one extra electron, it becomes a chloride ion. What is the net charge of a chloride ion?

This question focuses on reasoning about equilibrium inside the nickel block shown in Figure 14.92. Start with these premises:

  • The definition of equilibrium inside a conductor and
  • The relationship between average drift speed and electric field

in a conductor to reason about which situations are possibleinside the nickel block at equilibrium. Some of the situations listed below are possible, some are ruled out by one premise, and some are ruled out by two premises. If a situation is ruled out by two premises, choose both.

Case 1:\({\bf{\bar v = 0}}\)and \({{\bf{E}}_{{\bf{net}}}}{\bf{ = 0}}\) (1) Possible, (2) Not possible by definition of equilibrium, (3) Not possible because \({\bf{\bar v = u}}{{\bf{E}}_{{\bf{net}}}}\)

Case 2:\({\bf{\bar v = 0}}\)and \({{\bf{E}}_{{\bf{net}}}}{\bf{ > 0}}\) (1) Possible, (2) Not possible by definition of equilibrium, (3) Not possible because \({\bf{\bar v = u}}{{\bf{E}}_{{\bf{net}}}}\)

Case 3:\({\bf{\bar v > 0}}\)and \({{\bf{E}}_{{\bf{net}}}}{\bf{ = 0}}\) (1) Possible, (2) Not possible by definition of equilibrium, (3) Not possible because \({\bf{\bar v = u}}{{\bf{E}}_{{\bf{net}}}}\)

Case 4:\({\bf{\bar v > 0}}\)and \({{\bf{E}}_{{\bf{net}}}}{\bf{ > 0}}\) (1) Possible, (2) Not possible by definition of equilibrium, (3) Not possible because \({\bf{\bar v = u}}{{\bf{E}}_{{\bf{net}}}}\)

Now that you have considered each case, in equilibrium, which one is the only situation that is physically possible? (1) Case 1, (2) Case 2, (3) Case 3, (4) Case 4
See all solutions

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