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Chapter 14: Q41P (page 582)

A solid plastic ball has negative charge uniformly spread over its surface. Which of the diagrams in Figure 14.85 best shows the polarization of molecules inside the ball?

Short Answer

Expert verified

Diagram (c) correctly represents the polarization of the molecules inside the ball.

Step by step solution

01

Significance of the polarization

The polarization is referred to as the property of electromagnetic radiation, in which the magnitude and the direction of an electric field are related specifically.

The concept of polarization gives the polarization of molecules inside the ball.

02

Determination of the polarization of molecules inside the ball

Here, as the electric field inside a uniformly charged sphere is zero, then the polarization of the molecules will not happen as there is no electric field inside.

Diagrams (a) and (b) shows the polarization of the molecules which are incorrect as there is no net electric field inside the ball and due to not having an electric field, only the negative charge should be there at the surface.

Diagram (c) shows only the uniform negative charge outside the sphere which is correct as no polarization will happen.

Thus, diagram (c) correctly represents the polarization of the molecules inside the ball.

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Most popular questions from this chapter

A positively charged sphere is placed near a neutral block of nickel, as shown in Figure 14.92. (a) Which of the diagrams in Figure 14.93 best represents the equilibrium distribution of charge on the neutral nickel block?

(b) At location P inside the nickel block the electric field due to the charged sphere is <-625,0,0>N/C. At equilibrium, which of the following statements must be true? (1) It is not possible to determine the electric field at location P due only to charges on the surface of the nickel block. (2) The electric field at location P due only to charges on the surface of the nickel block is <0,0,0>N/C. (3) Because the net electric field at location P is <0,0,0>N/C, the field at P due only to charges on the surface of the polarized nickel block must be <625,0,0>N/C.

A typical atomic polarizability is 1脳10-40C路ml(N/C). If theq in p=qsis equal to the proton charge e, what charge separation s could you produce in a typical atom by applying a large field of 3脳106N/C, which is large enough to cause a spark in air?

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

You have three metal blocks marked A, B, and C, sitting on insulating stands. Block A is charged, but blocks B and C are neutral (Figure 14.76).

Without using any additional equipment and without altering the amount of charge on block A, explain how you could make block B be chargedand block C be charged. Explain your procedure in detail, including diagrams of the charge distributions at each step in the process.

Explain in detail, including diagrams, what happens when a negatively charged tape is brought near your finger.
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