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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

You rub a clear plastic pen with wool, and observe that a strip of invisible tape is attracted to the pen. Assuming that the pen has a net negative charge, which of the following could be true? Select all that apply. (1) The tape might be negatively charged. (2) The tape might be positively charged. (3) The tape might be uncharged. (4) There is not enough information to conclude anything.

In Figure 14.84 there is a permanent dipole on the left with dipole moment μ1=Qs1 and a neutral atom on the right with polarizabilityα , so that it becomes an induced dipole with dipole moment μ2=Qs2=αE1, whereE1 is the magnitude of the electric field produced by the permanent dipole. Show that the force the permanent dipole exerts on the neutral atom isF≈(14πε0)212αμ12r7

Which statements about a neutral atom are correct? Select all that apply. (1) A neutral atom is composed of positively and negatively charged particles. (2) The positively charged particles in the nucleus are positrons. (3) The electrons are attracted to the positively charged nucleus. (4) Positively charged protons are located in the tiny, massive nucleus. (5) The radius of the electron cloud is twice as large as the radius of the nucleus. (6) The negatively charged electrons are spread out in a "cloud" around the nucleus.

If the distance between a neutral atom and a point charge is tripled, by what factor does the force on the atom by the point charge change? Express your answer as a ratio: new force/original force.

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