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Chapter 14: Q10Q (page 578)

A positive charge is located between a neutral block of plastic and a neutral block of copper (Figure 14.68). Draw the approximate charge distribution for this situation.

Short Answer

Expert verified

The electric charge on the plastic block would be non-uniform whereas the distribution of the electric charge on the copper block would be uniform.

Step by step solution

01

Understanding the electric charge distribution

In this problem, the concept of electric charge distribution on the surface of a neutral block due to a specific point charge placed near/ close to the neutral block. The distribution of electric charge on a non-conducting block would be non-uniform in comparison to a conducting block.

02

Representation of the approximate charge distribution on the neutral plastic and copper blocks

A positive charge is located between a neutral block of plastic and a neutral block of copper. The representation of electric charge separation takes place in both blocks, as given below.

The distribution of the electric charge takes place uniformly on the surface of the copper block, whereas the distribution of the electric charge takes place non-uniform on the surface of the plastic block.

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Most popular questions from this chapter

A negatively charged iron block is placed in a region where there is an electric field downward (in the Y − direction) due to charges not shown. Which of the diagrams (a–f) in Figure 14.88 best describes the charge distribution in and/or on the iron block?

Carbon tetrachloride $({CCl}_{4})$ is a liquid whose molecules are symmetrical and so are not permanent dipoles, unlike water molecules. Explain briefly how the effect of an external charge on a beaker of water $(H_{2} O)$ differs from its effect on a beaker of CCl₄. (Hint: Consider the behavior of the permanent dipole you made out of U and L tapes.)

(a)The positively charged particle shown in diagram 1 in Figure 14.94 creates an electric field ${\vec{E}}_{p}$ at location A. Which of the arrows (a–j) in Figure 14.94 best indicates the direction of ${\vec{E}}_{p}$ at location A?

(b)Now a block of metal is placed in the location shown in diagram 2 in Figure 14.94. Which of the arrows (a–j) in Figure 14.94 best indicates the direction of the electric field ${\vec{E}}_{m}$ at location Adue only to the charges in and/or on the metal block?

(c) $| {\vec{E}}_{p} |$ is greater than $| {\vec{E}}_{m} |$ . With the metal block still in place, which of the arrows (a–j) in Figure 14.94 best indicates the direction of the net electric field at location A?

(d)With the metal block still in place, which of the following statements about the magnitude of ${\vec{E}}_{p}$ , the field due only to the charged particle, is correct?

(1) $| {\vec{E}}_{p} |$ is less than it was originally, because the block is in the way.

(2) $| {\vec{E}}_{p} |$ is the same as it was originally, without the block.

(3) $| {\vec{E}}_{p} |$ is zero, because the electric field due to the particle can’t go through the block.

(e)With the metal block still in place, how does the magnitude of ${\vec{E}}_{n e t}$ at location Acompare to the magnitude of ${\vec{E}}_{p}$ ?

(f)Which of the arrows (a–j) in Figure 14.94 best indicates the direction of the net electric field at the center of the metal block (inside the metal)?

Criticize the following statement: "Since an atom's electron cloud is spherical, the effect of the electrons cancels the effect of the nucleus, so a neutral atom can't interact with a charged object." ("Criticize" means to explain why the given statement is inadequate or incorrect, as well as to correct it.)

Criticize the following statement: “When you rub your finger along the slick side of a U tape, the excess charges flow onto your finger, and this discharges the tape.” Draw diagrams illustrating a more plausible explanation.

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