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Chapter 16: Q15Q (page 663)

The graph in Figure 16.63 is a plot of electric potential versus distance from an object. Which of the following could be the object?

(1) A neutron, (2) A sodium ion (Na+), (3) A chloride ion (Cl−), (4) A proton, (5) An electron.

Short Answer

Expert verified

The correct options are (3) a chloride ion and (5) an electron.

Step by step solution

01

Concept/Significance of electric potential

The electric potential is a basic method of expressing how much energy an electric particle has as a result of being in an electric field.

02

Determination of the correct object

The charge's sign affects the potential's sign. the potential of the object is given by,

v=KQr

Here, K is the coulomb constant, Q is the charge on the object and r id the distance between reference point and object.

The potential in the quarter in figure indicates that the object's potential is negative, implying that the object's charge is also negative. As a result, the objectsa chloride ion and an electron arenegative.

Thus, the correct options are (3) a chloride ion and (5) an electron

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Most popular questions from this chapter

Suppose that the potential difference in going from location (2.00,3.50,4.00)m to locationrole="math" localid="1657094482453" (2.00,3.52,4.00)m is3V. What is the approximate value ofEyin this region? Include the appropriate sign.

In a region with an uniform electric field, you measure a potential difference of from the origin to a position of (0,0,10) m. Now we add a uniformly charged, thin spherical plastic shell centered at the origin. The spherical shell has a radius of 5 m and a charge of -3530 nC. Draw a diagram to help answer the following questions: (a) What is the potential difference from the origin to a position of (0,0,5) m (at the surface of the spherical shell)? (b) What is the potential difference from the position of (0,0,5) m to a position of (0,0,10) m ?

A thin spherical shell of radius \({R_1}\)made of plastic carries a uniformly distributed negative charge \( - {Q_1}\). A thin spherical shell of radius \({R_2}\)made of glass carries a uniformly distributed positive charge \( + {Q_2}\). The distance between centers is \(L\), as shown in Figure 16.80. (a) Find the potential difference \({V_B} - {V_A}\). Location A is at the center of the glass sphere, and location \(B\) is just outside the glass sphere. (b) Find the potential difference \({V_C} - {V_B}\). Location \(B\) is just outside the glass sphere, and location \(C\) is a distance d to the right of \(B\). (c) Suppose the glass shell is replaced by a solid metal sphere with radius R2 carrying charge \( + {Q_2}\). Would the magnitude of the potential difference \({V_B} - {V_A}\) be greater than, less than, or the same as it was with the glass shell in place? Explain briefly, including an appropriate physics diagram.

15,000VIn the cathode ray tube found in old television sets, which contains a vacuum, electrons are boiled out of a very hot metal filament placed near a negative metal plate. These electrons start out nearly at rest and are accelerated toward a positive metal plate. They pass through a hole in the positive plate on their way toward the picture screen, as shown in the diagram in Figure 16.69. If the high-voltage supply in the television set maintains a potential difference of 15,000Vbetween the two plates, what speed do the electrons reach?

A small metal sphere of radius r initially has a charge q0 . Then a long copper wire is connected from this small sphere to a distant, large, uncharged metal sphere of radius R. Calculate the final charge q on the small sphere and the final charge on the large sphere. You may neglect the small amount of charge on the wire. What other approximations did you make? (Think about potential…)
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