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Chapter 16: Q2Q (page 661)

The graph in Fig.16.56 shows the electric potential energy for a system of two interacting objects, as a function of the distance between the objects. What system might this graph represent?

(1) Two Protons, (2) Two sodium ions, (3) Two neutrons, (4) Two chloride ions, (5) Two electrons, (6) A Proton and an Electron, (7) A sodium ion and a chloride ion.

Short Answer

Expert verified

The above graph represents Two Protons, Two Sodium ions, Two neutrons, Two chloride ions, Two electrons

Step by step solution

01

Significance of the electric potential energy

The electric potential energy depends on the sign convention of the two charges Q1 and Q2.

02

Explanation of the graph that represents the potential energy

The equation of the magnitude of the electric potential energy is expressed as,

Ur12=kq1脳q2r12

It can be inferred from the above equation that :

(1) q1and q2 must have the same sign if U>0

(2) q1 and q2 must have the opposite sign if U<0

(3) At least one of the objects is neutral if U=0

By observation of the graph of UVsr12,it can be concluded that the graph of UVsr12is positive everywhere. So, the charges will be either both positive and negative.

Thus, the given graph might represent Two Protons, Two Sodium ions, Two neutrons, Two chloride ions, two electrons.

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Most popular questions from this chapter

Question: An electron passes through a region in which there is an electric field, and whiles it is in the region its kinetic energy decreases by 4.5脳10-17J. Initially the kinetic energy of the electron was4.5脳10-17J . What is the final speed of the electron? (You can use the approximate (nonrelativistic) equation here.)

The long rod shown in Figure 16.76 has length L and carries a uniform charge 鈭扱. Calculate the potential difference VA-VC. All of the distances are small compared to L. Explain your work carefully

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