ER2 A prism shaped closed surface is in a constant uniform electric field E filling all space pointing right The 3 rectangular faces of the prism are labeled A B and C Face A is perpendicular to the E field The bottom face C is parallel to E Face B is the leaning face B A C E Which face has the largest magnitude electric flux through it A A B B C C D A and B have the same magnitude flux ER4 CT 26 2d An electron is fired into the region of the three charges from the lower right as shown What is the direction of the acceleration of the electron when it is at point P y A Q Q Q P B x D C E none of these 26 4 ER6 If we move the point PCTvery far away x very large x d we expect the E field strength to approach Q y d P Q d Q x A E kQ x2 B E 3kQ x2 C E kQ x D E kQ 3x2 E E kQ ER8 CT 26 6 What is the E field at point P A E 2kQ s2 Q Q s B E sqrt 2 kQ s2 C E kQ sqrt 2 s 2 s s P D zero E none of the above Q s Q ER9 CT 26 7 What is the E field at point P A E 2kQ s2 2Q Q s B E sqrt 2 kQ s2 C E kQ sqrt 2 s 2 s s P D zero E none of the above Q s Q ER10 27 9of charge A uniform infiniteCTplane creates a uniform E field to the plane E Point S E Point T How does the magnitude of the E field at point S compare with that at point T A E S E T C E S E T B E S E T CT 27 10uniformly charged with Two infinite planes are the same charge per area If only one plane were present the field due to the I II III one plane would be E ER11 The field in region II has magnitude A 0 B E C 2E D Depends on where exactly in region II E Other not sure ER12 CT 27 7 3 closed surfaces enclose a point charge Which surface has the largest flux through it A Small pink cube B middle yellow sphere C larger green sphere D all 3 are same E Need more info green yellow pink CT 27 18 ER13 A solid copper sphere of radius A has an excess net charge of Q What is the magnitude of the E field at the center of the sphere Q A A E kQ A2 B E 0 C None of these CT 27 18b outside a solid neutral ER14 A point charge q sits copper sphere of radius A What is the magnitude of the E field at the center of the sphere r A q A E kq r2 B E kq A2 C E kq r A 2 D E 0 E None of these CT 27 18c ER15 A point charge q sits outside a solid neutral insulating sphere of radius A What is the magnitude of the E field at the center of the sphere r A q A E kq r2 B E kq A2 C E kq r A 2 D E 0 E None of these CT 27 19with charge Q sits in the ER16 A negative point charge interior of a thick spherical conducting metal shell which carries 2 net charge What is the total charge on the inner surface of the shell 2Q Q Outer surface Inner surface A Q B Q C 2Q D 2Q E 0 CT 27 19b with charge Q sits in the ER17 A negative point charge CT 27 19 interior of a thick spherical conducting metal shell which carries 2 net charge What is the total charge on the outer surface of the shell 2Q Q Outer surface Inner surface A Q B Q C 2Q D 2Q E 0 ER18 The electric field of a charge is defined by the force on A an electron B a proton C a source charge D a test charge ER19 A piece of plastic is uniformly charged with surface charge density 1 The plastic is then broken into a large piece with surface charge density 2 and a small piece with surface charge density 3 Rank in order from largest to smallest the surface charge densities 1 to 3 A B C D E 1 1 1 2 3 2 3 2 3 2 3 3 1 2 1 ER20 Which of the following actions will increase the electric field strength at the position of the dot A Make the rod longer without changing the charge B Make the rod shorter without changing the charge C Make the rod fatter without changing the charge D Make the rod narrower without changing the charge E Remove charge from the rod ER21 This box contains A a net positive charge B no net charge C a net negative charge D a positive charge E a negative charge ER22 The total electric flux through this box is A 0 Nm2 C B 1 Nm2 C C 2 Nm2 C D 4 Nm2 C E 6 Nm2 C ER23 Which Gaussian surface would allow you to easily use Gauss s law to determine the electric field outside a uniformly charged cube A A sphere whose center coincides with the center of the charged cube B A cube whose center coincides with the center of the charged cube and which has parallel faces C Either A or B D Neither A nor B
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