State the law of conse)l 3*8ju5skwq a dfj ot;d0x8orvation of electric charge.

  Is it possible for two negative charges to attr pikew/7v9sh)fjxhq c8f 9t0g3,nly5act each other?

  Is it possible for a positive anl;)dn8 iou g l;mzx35b -r x;tbx6bz/ed a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. b90 c : p/okmydht;tbg9qi,e; During the process the glass rod acquires a positidebp ;gtm,h/ky 9 :botc9q; i0ve charge and the silk

  A proton carries a

  The model of the atomb ; sydiq;ke:.5in5arcdt1hr6w z+ :z shows a

  A neutral atom always hjo ib;86tqrgt qh9 54fas

  An atom has more electrons than protons. The atom ivbpj/mz ejn*2i3c.us(t d n/9 s

  Materials in which the el 8xad7we76kx sectrons are bound very tightly to the nuclei are referred to677 x8adk xsew as

  Materials in which the electrons arekhq/ 1vl :vs6y n+ w/k sfmgt2f0-ast/ bound very loosely to the nuclei and can move about freely within the mate hvtf-a2m6: 0+kkl / sssv1q/yfnwgt/rial are referred to as

  A negatively charged rod is brought near onp *m6;)na3 uu9evoxlbe end of an uncharged metal bar. The end of the metal bar farthest from the charged rod wu9 3nboav6x puelm;*)ill be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They ar at*- htt5pyw 72ix+/a;.k0flb px:5jg qoqmue placed near eachatb tuoq lh:xij yp7f-mq5w5x.tp*ka; 2g0 +/ other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elelz5 q z3fsnvft5u*. 9jctroscope positively?

  An originally neutral electroscope is,e 1p k7r6mmps briefly touched with a positively charged glpsk1em r7,m 6pass rod. The electroscope

  An originally neutral electroscope is grounde f-8-ijky;gtp:, n tjid briefly while a positively charged ji-jfgkt y;in8-:t ,pglass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touu 0 u9o. sp98cnjhycr8e4t q4dches a neutral electroscope, and the leaves separate. Then a negative object is brought dcj on4y48.h9c8s qeuu 0prt 9near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placedobb,t9i g(yx9s(k6z q on an insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along the path followed by the first ball, strikes the first ball, and st6o((,9 g9k itbxbyszqops. The first ball rolls forward, but does not touch the negative object. At no time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coujj- d7m a07uqareezv8vwd54 -o4v 4lulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larv5bru)rm i75 ees w-r.ger in marr) -w7 mre5evs 5bi.ugnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutu,i;abp lb+5, ,daq hzo wge)5ral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force betweene+ la;5obu,a,i p dbwhq,z)g5 them?

  Two charged objects attract each other with a certain foran k2l25m.h g/kew0rw ce. If the charges on both objects are doubled with no c/ 5w klegn2r0hk m.2wahange in separation, the force between them

  Two charges are separated by a distance d and l:3t 2aqju*ut exert mutual attractive forces of F on each other. If the chargljtau*t: u2q3es are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happj tx+b o -i5o-p/+fv4zb ym33qp dss1fens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is4 yf3q jotvf pm-dp z+ssbo-1 +x/53ib reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What hawkfyo d/.xw2agwsw,0sk1.m( qty (p) ppens to the magnitude of the force on the pro1/( s0.k w xkgta.o)mqww2d, f( pwsyyton if a second electron is placed next to the first electron?

  An electron and a proton arni+cxd2x 8y1ea sjt) :e separated by a distance of 1.0 m. What happens to the magnitudet)yj1:s8 cxndeia x +2 of the force on the first electron if a second electron is placed next to the proton?

  An electron and a prot-6:d hak8i3k8j rmvrjon are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to the projrim8kdr-vj: h6a3k8 ton?

  A point charge of +Q is placed at the center of r av j d:p(fnjy2)/jk.a square. When a second point charge of -Q is placepkj a): (jd.j /ynfvr2d at one of the square's corners, it is observed that an electrostatic force of 2.0 N acts on the positive charge at the square's center. Now, identical charges of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is p ;bk6 ;t(5ki:5rq6fb vc-iyib u 8wtislaced at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on it. What is the magnitude of the force that acts on the center charge due to a third charge of +Q 6ii8;i565 (f ybrvu;-bctwqbt ki: ksplaced at one of the other vertices?

  Which of the following is nob98yk/dxazgkr s e1e81r 1 c/ut a vector?

  At twice the distance from a point charge, the strength of the electric fi *)fbsd..k fsseld

  Is it possible to have a zero sm*b-c v/p rvbq81a+uelectric field value between a negative and positive charge a -uvvr1/ c+sp8bq m*balong the line joining the two charges?

  Is it possible to have a zero nxoj ,yz)4 s4welectric field value between two positive charges jyzwxn4s ),4oalong the line joining the two charges?

  Electric field lines near psitive point cha ai ffb7xb(jvqp4/*6g-mih g2rges

  The electric field shown j)tobi 7j3v3 q

  Can electric field lines int-3l q q6zqcw7j q,vsu(ersect in free space?

  A solid block of metal in electrostatic equilibrium is placm j0.m 1ptlif+ed in a uniform electric field. Give a statement concerning the electric field in the bl.+ 0pjm1fitmlock's interior.

  If a solid metal sphere and a hollow mm3 ( 8a/mpxusnetal sphere of equal diameters are each given the same charge, the electric field (E) midway bxups8/3(nmam etween the center and the surface is

  A cubic block of aluminufflh nl5 *n7./v sgy.gm rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on thsl hglv*5fy /. 7f.nnge block's top surface?

  If a conductor is in electrostaxj+8 x4l)viv gtic equilibrium near an electric charge

  A positive point charge is enclose4g2q uu(w oo1p xsi*h)d in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point dsou1(q xohw gu4 *i2p)irectly above the hollow sphere has

State three properties of)r7 nb0gnh,p d8ol*zy conductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron/h3zy)*tiik n 0kbkc + is $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge of +2.00 mC(sg.2gluv3j 8kzx) r/z fod*y 1eq:gn . How many more protons than electrons does this piece ofn:1lggys(.*q8 uex 3zg /2)odvrzfkj plastic have?

  What is the charge on 1 kg 5 qcvaklip tw*gl:/-/of protons?

  An atomic nucleus has a charge m.d-4 fvc3xgz of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.4b,f ivt e- b vds8jhkx*0y;tig8.bf:5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude ,d 0ej8b :fbhyv k8tsfig4v;i.-tb*x of the electric force between them?

  A 1.0-C charge is 15 m from f8b6rfw z1w5h 9x2mv- lis2fva second charge, and the force between them is 1.0 N. What is the magnitude of tr hwm-6il21fvb9 vz58s 2xffw he second charge?

  Two 1.0-C charges have a force between them of 2 i7wpbxn*ch61.0 N. How far apart are they?

  The force between a )-ntb )/)ztnsvmjv 6 t:i+tuw$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1t6**1gv1 (caoba b 1pqsr.l si.0-N force. If they are moved .1*l(qbcsp6*t1 bao i1gsv ra to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.d95 qi u wekjcb5re ;mn/ m55ex3nv8e+0 mC are placed on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and theee 5mrq 5ujb5k+ v exe/9;n 85cdwnim3 third is at the 100 cm mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is pla6n i+g:*ke( q) vlmqqaced at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC at the 100 cm mark. What are the magnitude and direction of the igv *q6a+ (m:q qkenl)electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following lol+rh yt6y+1positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.0rl +t16yh oly+0-mC charge?

  A point charge of +Q is placed at the center of a square, and ynq:x7f29m f i i.bz6qe;1sp;wyeua g 54 9hqwa second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What is the magnitude of thxiey p:wwi;ymfg 6 .12fhe7s b 4q;uq 9aq9zn5e force that acts on the center charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC isflj,kn (j35ub at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net for(b,fuk3jln5 jce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nCju:tka*.4ssl vx t./t is at (0, 0.10 m); Q3 = 5.0 nC is at (0tl/ . :4 *autxks.tjsv, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at t fz:4sgjo3ggm 5;f ts;he vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force whi g gzt;5 s:jofsg4mf;3ch acts on any one of the charges?

  Consider point charges of +Q e2c,hg;u q7m gand +4Q, which are separated by 3.0 m. At what point, on a line betweu m; q2eh,g7cgen the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 5vqv 6l9 t ww6e4qhhx*4.0 m. Where on the x-axis can a third charge bthhq69 56qw xwe4vv*le placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed atpix *c,in7jx6pe3a66x ujb 0w5ee+9+hki zi h x = 2a. Where can a third positive charge +q 5+zx603j jkcx*uee h6nhxaeiiw ,p9 ip67i+b be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g.6.jrz-b 6wr yo A total of $4.0 \times 10^{12} \; electrons$ are transferred from one neutral penny to another. If the electrostatic force of attraction between the pennies is equal to the weight of a penny, what is the separation between them?

  An electron is held up against the twpgk v5. 5*zpforce of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the .gp*zv tkpw55proton?

  Two 0.20-g metal spheres are hjh y1gie.vw:z6/w;u+1qp uiy ung from a common point by nonconducting threads which are 30 cm long. Both are given ident6qgvh eiiu1y.1wz w pj u;/+y:ical charges, and the electrostatic repulsion forces them apart until the angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnitude of the electrzvsfla2q990mj: yc; )f6z 8 zzwj9co iic field at a distanc)f0:9o8 jq2l69czyczvj az w; szim9fe of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric 48nog,n de yo.d ((kx 4ubbrj7c ipi36field at a distance of 1.50 m fro47i,d(rybj xig8 d4n.ne o kco3p (ub6m a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitud d.xb6nwcz/z )e of the electric field at the location of the test chadc6z.wn x/) bzrge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of 7z twc4ugeito+ : 68iethe electric fiel iei g876:cettow+4u zd?

  A 5.0-C charge is 10 m from a small test charge. Wha m u;m*)/:l9pj ;wd7zvzcfrnom-xzd 6t is the magnitude of the force experienced by a 1.0 nC ;7dm;z pu)fxo* z6:v-m jcw zd/r 9lnmcharge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separa i(:w dq*d(allflz+1 c-q hd3t83xgf8p:h f jated by a distance of 4.0 m. What is the elf: -3*f xw8al(q lpht: iaq+c1 8 gdjzfhd3d(lectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cr 1ba0tbl-3bl m mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the el b310alrtb-lb ectric field at the 30 cm mark?

  A 5.0-mC charge is placed tnp q5a q48c-yat the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is y-5tpnq84a cq the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m9iv .dytowofmx .,r3,0 gah y2. What is the magnitude of the electric field at the point midway between thhy9d3o 0tfiary , .2go, mw.vxem?

  Three 3.0 mC charges are at the three corners ofzk/sevp-rh,3ji/x9 b a square of side 0.50 m. The last-k,j 3/s biehr/x9zvp corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chargedk4k8p ,k )lp3h svmv-s are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0); -3.0 mC at (0, 1). What k34p m)hdpv lvk,-k8s is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is p 9m6drqx8 u5lsuvj:/placed in a uniform electrlm /v5 xuqru:d6pj9s 8ic field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mak( 7-ycn7 h+nqmjj*rnss of $5.0 \times 10^{-3} \; kg$. What electric field directed upward will exactly balance the weight of the particle?

  A Styrofoam ball of mass 0.120 g is placed in a5s22ig3( y (anwxtcaf n electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspend 2sn(52w 3fyatic x(aged?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. Thd6-ubw c 7b-uze ball is placed inside a uniform electric field, and -dzw7 6u bub-cis suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carrt ,7lskaa i gb4x(u1;:tj5i cyies a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from tha4lsix ,ka;(iuj 57cyg: bt 1te sphere's surface?

  A metal sphere of radius 2.0vixbjqy 8fi4 +8a9 )yo cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the ayb vix4f88jo9qi+y )center of the sphere?