A) Two point charges, q1 and q2, are separated by a distance of 2 m. The force b

Question

A) Two point charges, q1 and q2, are separated by a distance of 2 m. The force between the charges is F. If the charges are moved so that they are 1 m apart the new force Fnew will be exerted. Which of the following is true? Does Fnew = F *?2, Fnew = F /2, Fnew = F /?2, Fnew = F, Fnew = 2F B)A basketball defines a Gaussian surface. You measure a net electric flux through the basketball that is positive. What can be said about the charge enclosed by the basketball? A.It is only positive charge, and all of the charge is located at the center of the ball.B.Nothing can be said about the charge enclosed by the ball based on the given information. C.It is only positive charge, but the locations of the charges within the ball cannot be determined.D.It is net positive, and all of the charge is located at the center of the ball.E.It is net positive, but the locations of the charges within the ball cannot be determined. C) An electron (qe = -1.6 x 10-19 C) orbits a proton (qp = 1.6 x 10-19 C) at a distance of about 5 x 10-11 m, forming a hydrogen atom. Determine the electric force the proton exerts on the electron. A.4.61 x 10-18 N toward the proton B.9.22 x 10-8 N away from the protonC.9.22 x 10-8 N toward the protonD.5.76 x 1011 N toward the protonE.5.76 x 1011 N away from the proton

Explanation / Answer

A) Two point charges, q1 and q2, are separated by a distance of 2 m. The force between the charges is F. If the charges are moved so that they are 1 m apart the new force Fnew will be exerted. Which of the following is true? Does Fnew = F *2, Fnew = F /2, Fnew = F /2, Fnew = F, Fnew = 2F

Fnew = 4F

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B)A basketball defines a Gaussian surface. You measure a net electric flux through the basketball that is positive. What can be said about the charge enclosed by the basketball?

A.It is only positive charge, and all of the charge is located at the center of the ball.

B.Nothing can be said about the charge enclosed by the ball based on the given information.

C.It is only positive charge, but the locations of the charges within the ball cannot be determined.

D.It is net positive, and all of the charge is located at the center of the ball.

E.It is net positive, but the locations of the charges within the ball cannot be determined.

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C) An electron (qe = -1.6 x 10-19 C) orbits a proton (qp = 1.6 x 10-19 C) at a distance of about 5 x 10-11 m, forming a hydrogen atom. Determine the electric force the proton exerts on the electron.

A.4.61 x 10-18 N toward the proton

B.9.22 x 10-8 N away from the proton

C.9.22 x 10-8 N toward the proton

D.5.76 x 1011 N toward the proton

E.5.76 x 1011 N away from the proton

F = kq1q2/r^2 = 8.99e9*1.6e-19*1.6e-19/(5e-11*5e-11)=9.22 x 10-8 N toward the proton

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