95.26: Two positive poin28zy*e; fgdrgt charges repel each other with force 0.36 N when their separation is 1.5 m. What force do they exert on each other when their separation is 1.0 m? *y28fr ge;zdg

  12.13 Approximately how many electrons must be removed from an electrically n;,393+,sq b2irlck+ si gscnoysv6vneutral object to give it a n6 ss,2scrngkn v ;3yi svi+3co,b+l9qet charge of Q = + 1.00 C ?

  13.15 In a circuit, the flow of electrons3qvkxq8a/s ; x 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 vertic 8sxvqa/k q;x3al cross-section of the wire during this time?

  13.07: Two identical particles are fixed in;whcq(sx6hjpw+c 8.uv 0s. ox place a distance of 0.50mapart. The electric force that one particle exerts on the other has a magnitude of 3.00 N. Which one of the following choices best represents the magnitude of+q( .hsojpch 6uvs0 xw;wxc8. each particle’s charge?

  07.25: If two protons are spaced by a distance R, what is the ratisxu.l g9k6w/u o of the gravitational force tkx s.6u9/ wlughat 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 a proton of charge .q zy+8gd21sgk k/x ls t4dl2mQ 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 experiences the greatest magnitude of electric force from the other and which object experiences the greatest magnitude of acceleration? xlmdkk s12.z 8gys2q dtgl4+ / Ignore gravity.

  94.39: A small object with charge q and weight mg is attached to one end o vl:eh. - kxya.: vikjh)4lqn6f a string of length L. The other end is attached to a stati:va- qnj4v:kl).hyek6.ixl h onary 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 makes 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 an insukv;j76p ts-nsrhjf 2qv (-ub1lating massless stritjsurq (pnb27v6-khj 1- s vf;ng 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?

  13.29 Two electrons enter a regq1pvl,mmj9t -zw)ks +ion between charged capacitor plates with equal speed v. Electron A is directed horizontally to the left while electron B is directed at9sm,jl1-wz )vkp +q tm$30^{\circ}$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 exerts5 0+wgj)zi jqk a force of magnitude F on a 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 ckz +)50qjgwij harge?

  98.08: When two charged point-like objects are sepq xcgt:r7 gfvdo2ad8+)x1- z garated by a distance R, the force between them is F.zcrq 1ga+vo:gx82-tf)g d7xd If the distance between them is quadrupled, the force between them is

  03.18: Two identical electrical point charges Q, separated :y1v ih-ve/p dby a distance produce an electrical force ofF on one another. If the distance is decreased to a distance of 0.4devv/1hpy- :i0, what is the strength of
the resulting force?

  96.34: A point charge +q is placed midway between two point charges +3q ansei 6 6 *detzxs;p-ug,d -q separated by a distance 2d. If Coulomb’s constant is k, the magnitude of the force on -p66zt iegs,;ex *usd the charge +q is:

  01.31: A positive point charge of +q and a negative point chargta0y3n( php2zssro5- e of -q are separated brsy2zson p0- (5aht3py a distance d. What would be the magnitude of the electric field midway between the two charges?

  08.33: Two point charges are fixed on the x-axis inotherwise empty space. -15 h jgeg5qyzodk5 aw1* i4ip)oqco as shown e5)51 qgwizo.*ih o 5g1kjdqc4p -oya 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 fixed on the x-v o0 .p/p(eg-cr phw8uaxis in otherwise empty space as shown below. wpou/ -gepr0.8 vc(hp
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 and –4Q are arranged as shown in the6o 2bh8b xd8y q(z-x n+5jrd9*fxxp rf accompanying diagram. At which of the labeled points is the field moxxy q2p8xh8-dz b fn 9r*j(od f6rx5+bst nearly zero?

  98.30: Four positive poinj4)ed:z0hbdf6jx46f rbpy jykl 8xo-m 6(.n m t charges are arranged as shown in the accompanying diagram. The force between charges 1 and 3 is 6.0 N; the force between charges 2 and 3 is 5.0 N; and the force between charges 3 and -jxzxebf .n:4k46yy 6)ljd m o0d(8pbhrmf6 j4 is 3.0 N. The magnitude of the total force on charge 3 is most nearly

  94.08: A point charge of +4.0 μwohu+ xi42bl+ C 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 mto the right of tu+bw2xlo+ i4 hhe origin. The net electric field at the origin is zero. What is q?

  95.36: Assume the elect-6zji s+7wba 0ln ge: ygf2iy(ric potential is zero at infinity. A point charge of +4.0μC is placed on the negag62g y: b-0e(lnfwsyi+j i7zative 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 also zero. What is q’s charge?

  03.27: Four electrical charges arjq cheko5dg2:p-b,k8uqh 3 q)e arranged on the corners of a 10 cm square as shown. What would be the direction of the resulting electr, c8hqqu5bp:3 jh oq2)g k-kedic
field at the center point P?

  14.10: Two charges −Q and +Q, 7w*2dj nb*bvtare fixed in place on the x-axis, each a distance a from the origin as shown. At the point labeled P, a distance along 72v bnt w**jdbthey-axis from the origin, what is the direction of the electric field from the given charges?

  16.33 Given the configuration of three(ssi3ms 5 re3m3ym;tr charges, +Q, +Q, and −2Q, which one of the following choices best represents the direction of the electric field at the point P and the sign of the electric potential at P from sts5 rmyeir3m;ms 3(3 these charges?

  17.43: A semi-circle h,;7z2wcs9 itndd z r+aas radius R, total charge Q, and a charge per unit length given 7s,itz2 zdrwc+a; n 9das $λ=λ_0cosθ$ 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?