Which is the correct direction of the electric field created by charge -Q at the location shown (below and left of the charge)?CT 25.13ABCDE-QCT 26.1Two charges (each +Q), are equal distances from the origin. What is the direction of the electric field at the origin? +Q +Q Field here? A B C E = none of these D +Q+QE: none of theseCT 26.2A point in empty space is near 3 charges. The distances from the pt to each charge are identical. xyABC+2Q+Q+QA: Some angle < 45obelow the +x-direction.B: 45obelow the +x-direction.C: along the +y directionD: Some other angle.E: It is zero thereThe direction of the electric field at that point is..CT 23-11aA circular ring of radius R, uniformly charged with total charge +Q, is in the xy plane centered on the origin. The electric field at position z=h on the z-axis, due to a small piece of the ring with charge dQ, is shown. What is the magnitude of the field dE?y x z R dE dQ h otherEhRkdQDhRkdQChkdQBhkQA:::::222222CT 23-11bWhat is dEz, the z-component of dE?y x z R dE dQ h A: dEsin ()B: dE cos ()C: dE tan ()D: none of theseCT 23-11cWhat is cos()?y x z R dE dQ h otherEhRhDRhChRhBhRhA:cos::::2212222CT 23-11cWhich graph correctly represents the Electric field Ezon the z-axis?z Green Ez z Ez z Ez z Ez Pink Yellow Pink Purple: None of these is correct / don’t know. ABCDE: non of these are correctHJ-D1What is the magnitude of the net force on a dipole in a uniform electric field?+Q-QA: 0B: Q EC:2 Q ED: Q E sin E: Q E d sin Electric field = EThere are no charges in the regions shown, but there are charges present outside the boxed regions shown. Which of the following are possible electric field line configurations?(a) (b) (c) (a) (b) (c) 24-1A: (a) onlyB: (b) onlyC: (c) onlyD: (a) and (b)E: other combinationWhich sketch best shows the E field around 2 identical protons?CT 26.8ABCDCT 27.2Two open surfaces are in an E field. Surface A is a flat circular disk of radius R. Surface B is a hollow-cup hemisphere of the same radius R. Which surface has a greater flux through it?A: AB:BC: Both surfaces have the same flux.D: Not enough infoABCT 27.3bWhich has the greater flux now?ABA: AB:BC: Both surfaces have the same flux.D: Not enough infoCT 27.4What is the net electric flux through the closed cylindrical surface shown?A: 0 B: positive C: negativeCT 27.8bEELcap areaAradius rA: EA B: +2EA C: - 2EA D: (2A+Lr2) E E: 0An imaginary Gaussian surface in the shape of a right cylinder is shown. The flux through the surface is…CT 27.21bA sphere of radius R has a total charge +Q spread uniformly throughout its volume.R r What is the total charge enclosed by the small centered sphere of radius r?E: None of theseB: Qr2R2C: Qr3R3D: QR3r3A: Q 43 r3CT 27.21cR r If the electric field at distance r from the center of the sphere is E, what is the fluxout of the small sphere?E -dA A: E R2B: E 4 R2C: E 4 r2ErD234:ERE234:CT 27.21dWithin the sphere, how does the E- field magnitude, E, depend on distance (r) from the origin?A: E r B: E r2C: E r3D: E=constant within the sphere.E: None of these, E=0 within the sphere.HL Flux-1 +2Q+QHL Flux-1 +2Q+QHL Flux-1 +2Q+QCT 27.19A negative point charge with charge -Q sits in the interior of a thick spherical (conducting) metal shell (which carries 0 net charge).A: -QB: +QC: +2QD: zeroE: Other-QInnersurfaceOutersurfaceGaussiansurfaceWhat is the total charge on the innersurface of the shell?CT 27.19bA negative point charge with charge -Q sits in the interior of a thick spherical (conducting) metal shell (which carries 0 net charge).A: -QB: +QC: +2QD: zeroE: Other-QInnersurfaceOutersurfaceGaussiansurfaceWhat is the total charge on the outer surface of the shell?CT 27.19exE=0
View Full Document
Unlocking...