95.26: Two positive point cdjsfi. *);avr1- cqza harges repel each other with force 0.36 N when their separation is 1.5 m. What for;.rcs-i v 1qf*jaa)dzce do they exert on each other when their separation is 1.0 m?

  12.13 Approximately how many ej9f18k+hq 8fb 1flgqg lectrons must be removed from an electrically neutral object to give it a net 8jqqgffbhg 1k8lf1 9+charge of Q = + 1.00 C ?

  13.15 In a circuit, the flow of electrons in a hh7xovxla 3jy-b .kz:h 40 (lbaorizontal wire produces a constant current of 3.20 A for a time of 3.0 hour. Which one of the foll :xjah074xbol .z v3a-yh lkb(owing choices best represents the number of electrons that pass through a vertical cross-section of the wire during this time?

  13.07: Two identical particles are f 67 yadydix6p6ixed in 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 cxyy7ad 66ipd6hoices best represents the magnitude of each particle’s charge?

  07.25: If two protons are spaced by a distance R, what is the ra yx v):tul,tcx9e)+v.yfze) qtio of the gravitational for)9cuxy t:)qe vlztf ,) evyx+.ce that 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 e)nlw; drjg/:fnep 7/ hxperiment with a 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 th /pwgnnl;rd/7hje:)f at experiences 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 charge q andw s,88,lsr* zbe jh/d6v uyga7 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 makes a constant angle q with the vertical. What is the sign 6 /byeuvag8s d8s,z*hwrl ,j7 and magnitude of q?

  09.38: A small object of mass M and charge Qqse f3 cmayf*( -3ryyl3 9brl0 is connected to an 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 a a0l33r y*9 befmyfy(lr -sqc3s 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 b4kwu2o;jtc + a region between charged capacitor plates with equal speed v. Electron A is directed horizontally o;t 2kcu+4wjbto 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 poivu2onw l y6z*t*1wbs70 nqq 5int charge exerts a force of magnitude F on a negative point charge placed a distance x awaylw05qyo*n*n 2 s1itz b6vu 7wq. 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 charge?

  98.08: When two charged poin (wh: tmgf ocqzm*v*df. l24)eru/zk 1t-like objects are separated by a distance R, the force between them is F. If the distance between them is quadrupllmu(.k*/gf zfzh t:ocdv2er *1 m)4qwed, the force between them is

  03.18: Two identical electrical poin -ajsa;3qkgz) ;bavz7 t charges Q, separated by a distance produce an electrical forcvzs7a j)bqazk-; 3g;ae ofF on one 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 chargk*r o0zvt 6d yv*)f7wbes +3q and -q separated by a distance 2d. If Coulomb’s constant is k, the magnitude of the fork7bo** dz vfy6vtw)0rce on the charge +q is:

  01.31: A positive point charge of +q and a negative point charge of -q are sepa6)urfit ej :2srated by a distance d. What would be the magnitude of the electric field midway between ts2f j:6iru)ethe two charges?

  08.33: Two point charges ar nzy6e(e9wc3+ dbuhjebxz +ig1ik ; 4;e fixed on the x-axis inotherwise empty space as shown beloweniihyegbk+;z jw e1;3d4b(x+zcu9 6.
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-axis in othjm6 oe /prr,-herwise empty space as shown ber ,6 phem/roj-low.
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 the accompanying dix/cip c5vlr i;3.5 fpzagram. At which of the labelpii 3 5./;fczlrpcvx 5ed points is the field most nearly zero?

  98.30: Four positive point charges are arranged as shownr :ipnm(t+ nnryy7xg- ;,br;9xss en( 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 4 is 3.0 N. The magnitude of the total force on charge 3 istn( (nrrx+ms7 g;:y;e 9r,xn -psibny most nearly

  94.08: A point charge of +4.0 μC is placed on the negativelz4r ) tbveo /ld25v0m 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 the origin. The net electric field at thblvo2ld)4 m/evtz 0 5re origin is zero. What is q?

  95.36: Assume the electric potential is zero at infinity. A p:5s z54aqq udya sc4bxq:i+l.oint 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 also zero. What is q’s chargeul4aqy+ d: zaq 5: .5cxibss4q?

  03.27: Four electrical charges ka/oqirtp p)i(przoe;+s;,) 6b 5ibiare arranged on the corners of a 10 cm square as shown. What would be the direction of the resulting()s;r/o b+e az ;iitkipq6)pib or p,5 electric
field at the center point P?

  14.10: Two charges −d.ttp.69mk6 j x cb4joQ and +Q, are fixed in place on the x-axis, each a distance a from the mt6xod .jb6 4.ktjcp9origin as shown. At the point labeled P, a distance along they-axis from the origin, what is the direction of the electric field from the given charges?

  16.33 Given the configuration of three charges, +Q, +Q, and −2Q6b8i0s cu6br *gvl m hv8(6jsy, which one of the following choices best represents the direction of the el vy*86sh 8sgub660jirclvmb( ectric field at the point P and the sign of the electric potential at P from these charges?

  17.43: A semi-circle has radius R, totfi/ j+eoc.l 6c4h)q qdal charge Q, and a charge per unit length gqflj/e ioh.) dc4q+6civen 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?