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Rank the electric fluxes through each Gaussian surface shown in the figure from largest to smallest. Display any cases of equality in your ranking 1.

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Presentation on theme: "Rank the electric fluxes through each Gaussian surface shown in the figure from largest to smallest. Display any cases of equality in your ranking 1."— Presentation transcript:

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3 Rank the electric fluxes through each Gaussian surface shown in the figure from largest to smallest. Display any cases of equality in your ranking 1. d > c > a = b 2. c > b = a > d 3. a = b > d > c 4. d = a > c > b

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5 A spherical surface surrounds a point charge q at its center. What happens to the flux through the surface as the radius of the surface is increased? 1.The flux increases. 2.The flux decreases. 3.The flux remains the same.

6 A spherical surface surrounds a point charge q at its center. What happens to the flux through the surface as the radius of the surface is increased? 1.The flux increases. 2.The flux decreases. 3.The flux remains the same.

7 Four equal charges are enclosed in a square Gaussian surface. If each charge is modeled with six field lines coming out of it, what is the net number of field lines across the left side of the square? 1.Zero 2.Six 3.Twelve. 4.Twenty-four. 5.Need more information.

8 Four equal charges are enclosed in a square Gaussian surface. If each charge is modeled with six field lines coming out of it, what is the net number of field lines across the left side of the square? 1.Zero 2.Six 3.Twelve. 4.Twenty-four. 5.Need more information.

9 Consider the charge q = 5  C shown at right, enclosed in inside two shells, S1 and S2. If the total charge on S1 is 2q, and outside S2 the electric field is zero, what is the charge Q on S2? a)5  C b)10  C c)- 5  C d)- 15  C e)None of these q S1 S2 2q Q

10 Consider the charge q = 5  C shown at right, enclosed in inside two shells, S1 and S2. If the total charge on S1 is 2q, and outside S2 the electric field is zero, what is the charge Q on S2? a)5  C b)10  C c)- 5  C d)- 15  C e)None of these q S1 S2 2q Q

11 A point charge –Q is at the center of a spherical conducting shell of inner radius R 1 and outer radius R 2. The charge on the outer surface of the shell is 1. +Q 2. Zero 3. -Q 4. Depends on the total charge carried by the shell.

12 A point charge –Q is at the center of a spherical conducting shell of inner radius R 1 and outer radius R 2. The charge on the outer surface of the shell is 1. +Q 2. Zero 3. -Q 4. Depends on the total charge carried by the shell.

13 A point charge –Q is at the center of a spherical conducting shell of inner radius R 1 and outer radius R 2. Suppose that the total charge on the conducting shell is zero. It follows that the electric field for r R 2 points 1. away from the center of the shell in both regions. 2. toward the center of the shell in both regions. 3.Toward the center of the shell for r R Toward the center of the shell for r R 2.

14 A point charge –Q is at the center of a spherical conducting shell of inner radius R 1 and outer radius R 2. Suppose that the total charge on the conducting shell is zero. It follows that the electric field for r R 2 points 1. away from the center of the shell in both regions. 2. toward the center of the shell in both regions. 3.Toward the center of the shell for r R Toward the center of the shell for r R 2.

15 A point charge –Q is at the center of a spherical conducting shell of inner radius R 1 and outer radius R 2. If the conducting shell is grounded, which of the following statements is correct? 1. The charge on the inner surface of the shell is +Q and that on the outer surface is –Q. 2. The charge on the inner surface of the shell is +Q and that on the outer surface is zero. 3. The charge on both surfaces of the shell is +Q. 4. The charge on both surfaces of the shell is zero.

16 A point charge –Q is at the center of a spherical conducting shell of inner radius R 1 and outer radius R 2. If the conducting shell is grounded, which of the following statements is correct? 1. The charge on the inner surface of the shell is +Q and that on the outer surface is –Q. 2. The charge on the inner surface of the shell is +Q and that on the outer surface is zero. 3. The charge on both surfaces of the shell is +Q. 4. The charge on both surfaces of the shell is zero.


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