95.26: Two positive point charges repel eaw z ttw zp+0jgy naso9-p0-*u9ch other with force 0.36 N when their separation is 1.5 m. What force do they exert onw0 pop9wjygz -*az0-9stnt+u each other when their separation is 1.0 m?

  12.13 Approximately how ma 9zkm p0z7bv5kny electrons must be removed from an electrically neutral object to gk5 0zvkb9 pm7zive it a net charge of Q = + 1.00 C ?

  13.15 In a circuit, the flow of elect2h7j refs kn./ r2ym8c n* jfa;3sm+uwrons in a horizontal wire produces a constant current of 3.20 A for a time of 3.0 hour. Which one of the following choices best represents the number of electrons that pass through a vertical cross-section of the wire nr w+su3jk2a8f;m/*nm7 yh2r.jefs cduring this time?

  13.07: Two identical particles are fixed inagp)sm7z3252 8 opapvnmd,cu place a distance of 0.50mapart. The electric force that one particle exerts on the oth7ngap 8z,)dpma uso3 pvm22c5er has a magnitude of 3.00 N. Which one of the following choices best represents the magnitude of each particle’s charge?

  07.25: If two protons are spaced by a distance Rfxj99 g q9fw5*ujce8c .4b bhe, what is the ratio of the gravitational force thajxu9 ff8*c5.jqbe hw4 be99c gt one
proton exerts on the other to the electric force that one proton exerts on the other?That is,$\frac{F_{gravity}}{F_{electric}}$=

  10.12: A scientist sets up an experiment with g.j+ vzy nl5)ja proton of charge Q and mass M being placed near a helium nucleus (2 protons and 2 neutrons) of charge +2Q and mass 4M. The objects are each released from rest and begin to move. From the scientist’s point of view, which choice best describes the object that experiennl.jgy+ z5j)vces the greatest magnitude of electric force from the other and which object experiences the greatest magnitude of acceleration? Ignore gravity.

  94.39: A small object with chiw g(ha aj(+u++nom 0marge q and weight mg is attached to one end of a string of length L. The other end is attached to a stationary support. The system is placed in a uniform horizontal electric field E, as shown in the accompanying figure. In the presence of the field, the string w 0j+omaam ++ (hn(igumakes a constant angle q with the vertical. What is the sign and magnitude of q?

  09.38: A small object of mass M and charge Q is connected to 3f rcvt84iy b8tg4kl3an insulating massless string in a vacuum on Earth. A uniform electric field exists throughout the region of the vacuum as indicated. The mass remains in static equilibrium at an angle of θ with the vertical as shown in the figure. When the string is cut, which of the illustrated paths best indicates the trajectory of the mass? t v i3r8klfy8 4tgc4b3

  13.29 Two electrons enter a region between charged capacitor pla 77j;vfssk +ehsiy 9r0tes with equal speed 9isfk0 r yh77vj+es;sv. Electron A is directed horizontally to the left while electron B is directed at$30^{\circ}$below the horizontal. Each electron makes it to the left-hand plate. Which one of the following choices best compares the speeds of the charges ( $V_A$, $V_B$) upon arrival at the left plate? Consider only the electrons A and B’s interactions with the constant electric field between the plates, ignoring any relativistic effects.

  08.06: A positive point charge exerts a force of magnitude F on a07 (v1oiy5osm jvlvw5 negative point charge placed a distance x away. If the distance between the two point charges is halved, what is the magnitude of the new force that the positive point charge exerts on the negative point jv5yosm0oi7 w5 lvv1 (charge?

  98.08: When two charged point-like objects arsm .bg rldk0g6 +/y+(we7 q:va1dqzlse separated by a distance R, the force between them is F. If the distance betwee /skdq+ 7bld(qmrg+:l vwgzs.6e1a 0y n them is quadrupled, the force between them is

  03.18: Two identical electrical point charges Q, separatedj7gkohrumc 2 jes6.7 2 by a distance produce an electrical force ofF on one roe2jj.67cmsg2 7 uhk another. If the distance is decreased to a distance of 0.40, what is the strength of
the resulting force?

  96.34: A point charge +q is placed midway between two point chakg 2u3j-dsle :kd/w)brges +3q and -q separated by a distance 2d. If Coulomb’s constant is k, the magnitude ofl:)sdw/k b-kd32ug ej the force on the charge +q is:

  01.31: A positive point charge of +q and a negative point charge of i5hh(/iw. 2pprjx, 9uv b u2um-q are separated by a dist.,ivuw jmbuh2pu2r 9h/(pxi5 ance d. What would be the magnitude of the electric field midway between the two charges?

  08.33: Two point chargwly fpmf* x 235ht.8wyb93llaes are fixed on the x-axis inotherwise empty space as shown hw5am2yl8 b3fwlyfx9l3t. *p below.
In which Region(s) is there a place on the x-axis (aside from infinity) at which the electric potential is equal to zero?

  08.34: Two point charges are fj ccq g/w9)qqj 2 66:dlkoh4dtm1ty 1zixed on the x-axis in otherwise empty space as showdj6mj16o24 dqtwcc g/khl y1)z qt:q9n below.
In which Region(s) is there a place on the x-axis (aside from infinity) at which the electric field is equal to zero?

  98.23: Two charges +Q annb su k2b/qv*inklfbdk(6 0jy o+4 3w5d –4Q are arranged as shown in the accompanying diagram. At which of the labeled points is the fief u/k( s40onb l3ny2w6 dqi*jvkbk+ 5bld most nearly zero?

  98.30: Four positive point charges are arranged as shown in the accompanyinzahr/5u9emc* g diagram. The force between charges 1 and 3 is 6.0 N; zrc h/e59u*ma the force between charges 2 and 3 is 5.0 N; and the force between charges 3 and 4 is 3.0 N. The magnitude of the total force on charge 3 is most nearly

  94.08: A point charge of +4.0 μC is placed on the n1;vh03 evoemba 4 hipx0m1i a4akiw69egative x-axis 0.20 m to the left of the origin, as shown in the accompanying figure. A second point charge q is placed on the positive x-axis 0.30 mto the b1exii a moe04v06pmw; 9 14aha3ikv hright of the origin. The net electric field at the origin is zero. What is q?

  95.36: Assume the electric potential is zero at infinity. A point cks/r6uonhnpem-77xhdlb2v/; 4qg; charge of +4.0μC is placed on the negative x-axis 0.20 m to the left of the origin, as shown in the accompanying figure. A second point charge q is placed on the positive x-axis 0.30 m to the right of the origin. The net electric potential at the origin is also4hluqn dx-c/vomrh 6bnek7p/;7 ;s2 g zero. What is q’s charge?

  03.27: Four electrical chargusbgb2h()-a-f +8g5 ylwesb q 2n r5uzes are arranged on the corners of a 10 cm square as shown. What would be the direction of w gl-egqu5ua5f(22szn+byr8- shbb )the resulting electric
field at the center point P?

  14.10: Two charges −Q and +Q, are fixed in place on the x-axis, each sbofmh y34 8/aa distance a from the origin as shown. At the point labeled P, a distance along they-axis/ayh4mbo8f3s from the origin, what is the direction of the electric field from the given charges?

  16.33 Given the configupicry t455 k/t jak(-bration of three charges, +Q, +Q, and −2Q, which one of the following choices best represents the direction of the electric field at the point P and th p( airj-kttc4k5b/5ye sign of the electric potential at P from these charges?

  17.43: A semi-circle has radius R, total charge Q, and a charge paz6 srk:/ brrdnedb z,6,(n.ber unit length givedrnzr(bsn/ dr6 k a,b 6,:zeb.n as $λ=λ_0cosθ$ with θ defined in the figure and $λ_0$ a positive constant. Which one of the following choices gives the electric field strength at the point labeled P?