State the law of conszl),ad,d av(qervation of electric charge.

  Is it possible for two negative charges to attract each oz ckdx x(/u)1gther?

  Is it possible for a positive and a negative charge to attract each other?u43iwsis w 7sz;w,( ux

  A glass rod is rubbed with a piece of silk. Dihgla (d (xjex57 p/.turing the process the glass rod acquires a positive charge7hdigex / .al(xjp( 5t and the silk

  A proton carries a

  The model of the atom showq au u7n8ti7:g 3poq(q4vn at3s a

  A neutral atom always han(ohzju2sg, 1, ep)gjs

  An atom has more electrons than protons. The atom i2o+95j,wzbp9s o1 rro : vyngftd6(ugs

  Materials in which the electrons are bound vtw:-,tkbo ;gk cvfy57 fjm+/ kery tightly to the nuclei are referredg7 vk/bw 5mjo+-f: ,yk;ktfc t to as

  Materials in which the electrons are bounlv.(p76he9d fxw xk 4wd very loosely to the nuclei and can move about freely within the material are referred to avw7(fh xe 9 l4.6pkdxws

  A negatively charged rod is brought nearrl839 b13bn7bj c xvta one end of an uncharged metal bar. The end of the metal bar farthest from the c7a j8 n3vbrcl931xb btharged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Thekl84b5avqa d+6pbs k:y are placed near each other on an insulated table. Sphere B is briefly toucheda8blpvsq 45 a:db+kk6 with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivelvp/*y85bkze ly?

  An originally neutral electroscope is briefly touched with a positively.- x: v 6wojhcot .nb,k:o;u85iwmh hj charged glass rod. The electroscope 8 jcibjwo.:-5oh. ,nmw ov h6u;tx:hk

  An originally neutra5::t6xc*z7adw6f:o 8 nrtft ra3en spl electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod i : fcrp536ensa7frwtx*t8od : n 6tza:s removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. dk:+3 k; .ycas:0fuzgpd8 pzy Then a negative object is brought near the electroscope, but does not typpgs38cfk:+zuzayd 0k;:.d ouch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table.wfi2 6i7jg8br 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 stops. The first ball rolls forward, but does not touch the negative object. At no time does either ball touch the negative object. What wir 7i82fgb6j is the final charge on each ball?

  Charge is

  What are the units of the Coulomb:g e0 km*zmdlkm/ g+ugj45lu92w7 l pe constant $k$, which appears in Coulomb's law?

  Two charged objects -t;hwun2+ynlz3 fr t0are separated by a distance d. The first charge is larger intzyfn -r23+ thn;lu w0 magnitude than the second charge.

  Sphere A carries a net+ 6ruu)9y6(pizt;fhwg4-a yyrn ge*c charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best degh(grr9ucyfzu- 4*y;w 6i) p6yta e +nscribes the electrostatic force between them?

  Two charged objects attract each other with a certain force. Inow+;+/fic v/pq a q 4bvx-q r5dm(0uif the charges on both objects are doubled with no change in separation, wvq;0/c+px-bim frd v5o i+na/uqq4( the force between them

  Two charges are sepaq73f4d 9p 0thz3unxm/iaqkk0 rated by a distance d and exert mutual attractive forces of F on each other. If the charges are sepax3mq09qd 7 f /hzi0k34utpnkarated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happ r7--epl,xk e0p3wtusens to the force betwep e elr0tpk7-xwsu3 -,en them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by m sj odyxyqu4 +18wy48a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed n d+ow8q8myu4syj 41 yxext to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. Whath: eoq b; v (83+wip,qnihqkui5.4dbw happens to the magnitude of the force on the first electron if a secondwedwo.+5i4kq v3; ,(inh q pibb 8quh: electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What h-xy1f0/zgg er s d70wfappens to the size of the force on the proton if the el7 dfy0-z gxfwrg/ 10seectron is moved 0.50 m closer to the proton?

  A point charge of +Q,nljry68fm43b lsn x3 is placed at the center of a square. When a second point charge of -Q is placed 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 charf,ns l4by3ljx3m6n8rges 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 placed at the centroid of an equilateral triangle. Wh:*m 3 e.g9aqfkft ket7en a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on it. Whaff 7q:.gae mt*k 39ktet is the magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vect8sh;u. 7 jicbior?

  At twice the distance from a point ,yoa4 owh) m emjh ihq3f)o/(6charge, the strength of the electric field

  Is it possible to have a zero elit a*yopu:2n bh9ixgsy+p. y r0l) +9bqveb* ,ectric field value between a negative and positive charge along the line ynuxbe yib2 )09+:*oqyailbh9prs.g*, v+p t joining the two charges?

  Is it possible to have a zero electric field value bhkmc6s86 x5y-+bx rz0sq z 2axetween two positive charges along the line joining the two cha +byxczszkxms865a0 x rh62-qrges?

  Electric field lines near p20ebj f64c:s;owmg q psitive point charges

  The electric field show +( *4frhrb0isxy b)wvn

  Can electric field lines intersect i(beqqf g:g +d4h tdzt0 ,ksf,)kwq9m *n free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elect+gqxq7 d 6sd/qric field. Give a statement concerning the electric field d6g+x7dq qqs/ in the block's interior.

  If a solid metal sphere and a hollow;ojgf.cr y hmw8+8m:r metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surface jwy g f8r .:rm;ho+8cmis

  A cubic block of aluminum rests on a wooden table -kq 6/vrv7 pxajaf;;* p g4eqain a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the bloc-eq pgj ;4 /7xv6f;aq*a prkavk's top surface?

  If a conductor is in elect15n btz- s1wm6nrc8nsh :g: , qeuxbm;rostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow mqi)sk-/ xlys+etallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly abov/qlk- +is)sxy e the hollow sphere has

State three properties of conductors in static equilibrium ( 3pad mgz:lm-z:2idd.

State Gauss's law.

  The charge carried by one electray21 ze5jso/zm b6kh:on 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. How many more protons than eloj 9. klr*nd,lectrons l.* jld ,9knrodoes this piece of plastic have?

  What is the charge on 1 k pkl)+q. j t1wm- g64zxz.tpuag of protons?

  An atomic nucleus has 9j. tdubyu :zc5 2z-jja charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cm, have charge valuenwub g7 j-*i9y*eb+ q xpm7-jbs of 2.0 and -4.0 mC, respectively. Wh+y*q7ejgmu*xi-j -wpbnb79b at is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is ; cm o8k*ba-1h/mgizs 1.0 N. mo1i8ahgb-cms *z; /kWhat is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0-fov,n).4 9mdp0 qjsjfl;rg r N. How far apart are they?

  The force between a /pe,pi8alc0( p pqxf7xm,na;$30 \; mC$ 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 1.0-N fwswk3mtd9 /a 6orce. If they are moved to a kda3t ww /m69snew separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are plr9c x3 r -dit:9oohp7r46hzywaced on the x-axis. The first charge is at the origin, the secohi9r6 3cyo9 x4:w7rpoz dt-hrnd to the right at x = 50 cm, and the 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 tji /+mex n 9*r9zf8ez*8que*zxwo zn;he x-axis. A charge of +2.0 mC is placed 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 elec9z me n/ wq *n;9x8fzee+z*jx 8uorz*itrostatic force which acts on the charge at the origin?

  Three point charges axer mhw (8/cb9x3uwq:4ax3g ues 6ac5re located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x =cg58w3/6 exa3qu er :ahu b( xx9wsm4c 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second point chao + :o6wjwzz2qlt.7 h1;h slmqrge 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. Wom:w lso.h;tj71lz6w q +z2 qhhat is the magnitude of the 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 is at (0, 0.10 m); Q3+)v p.rkzaa16ze o c)g = 5.0 nC is at (0, 0). What 6 + a)r.k1 zvcp)gozeais the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); 4x s/yth;dd5hQ2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the 4thdd /s;5 hxydirection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of l55-wp+7r s 4uu;aa69i loyv.q eb1-nxhtsp ran equilateral tr5 x76r 5eo9p4 bwu ar lh-.s-up;+ya1nqtilv siangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m)mlliz+ l;f :tam3d)k. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would i at+k lz;dm)3l:lf)m be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. *ig ;xjn* o;o cbk9oo u:j0gk; Where on the xjji;0*o g; g o*k9:bo;oc ukxn-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the orig/ lvbfxh(4rim 79*o cgin and charge -q is placed at x = 2a. Where can a third positive chargevo m4b/i*g( clxh 79fr +q be placed so that the force on it is zero?

  A copper penny has a massu g(jn+t9u2,hndsp*k 89c wz i of 3.0 g. 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 force of gravity by the attraction of a(g/byr .ib5. z l7l 0;poyuyqk pvp-i) fixed proton some distance above it. How far )i lbqoy.bp; g0(pyiyp k v-lr5.z7u/above the electron is the proton?

  Two 0.20-g metal spheres are hung *f7, qg7lp--*ugr zsvetww( qfrom a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apqw(elw ,**pf-rs-z7 7vuggtq art 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. Whaw-7eoj1d (tu rt is the magnitude of the electric fiel 1 r-dwjueo7t(d at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction hx(d 3tg8:u f2 rvfqt,of the electric field at a distance of 1.50 m from a 50 8qhr2 f,xd(tgfu :3tv.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitug81vg5v vv0*pauo xzj84 e9 kxgej*+t de of the electric field at the location of thgua ptgvvx+4v **0o xe jj98kg8v51zee test charge?

  A 5.0-C charge is 10 m from a smal0rm31r3 62cwlgaw n hzlm(fg.l test charge. What is the direction of the electric fieldhm nr02c.lza(m 1r 3gwg6 l3fw?

  A 5.0-C charge is 10 m from a small test charge. What is the magnie gd8ik;1w ymcpl/ 7/dtude of the force experienced by a 1.0 nC charge placed at thedliy1 c7;8g emkp/d w/ location of the test charge?

  Two point charges each have a value of 3.0 C and c eauvb.o,k,omk3*6 yare separated by a distance of 4.0 m. Whak ya3.6,,kmu* cvo ebot is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm *4a g3+zovt4evillhy; ;9m ir mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cm mark9;t hlm+ rviolz4ag *i3;4vy e?

  A 5.0-mC charge is placed at th a 37mgmgvct7,q4yyc0e 0 cm mark of a meter stick and a -4.0 mC charge is placed at aq7mc m,3vyc40 yg tg7the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x p2nnvlf+ ragvzzt i ,fz-67xn:24ia3 = 0 and x = 0.20 m. What is the magnitude 3fi6tznn +-2z xlprg7av4 i:,avz2f nof the electric field at the point midway between them?

  Three 3.0 mC charges are at r ,ylk:hbrwqel6+k s,m go5*;the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC kr;mbk5w, 6qlsh l:+o, eg *rycharge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m: e ;-xpcpqo)j on a side. Charges 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 x:;jcpq- p)eo(0, 1). What 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 placed in a uniform ese) x rc9( uw6wa.6b7 ekcca)blectric field. What is the magnitude of this electric fie 6. e)wksc )rw9c(b uxa7bec6ald?

  A particle with a chax kuld 1(0btzc6;,j lfrge of 4.0 mC has a mass 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 am) d; , l,55ykay,evziot-lbxn electric field of 6000 N/C pointing downward. What charge must be place,eb olmivtzy)k ,,yx d- al5;5d on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a cha(2 gvsg z2nv0v.v2ewprge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force g0vpwn evv. s2z(vg 22of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carrwh0m3m(s 3 vgwg4uk2sies a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surface?02sum m4ghg(wk3 3swv

  A metal sphere of rad*bptw p1+ ms/dius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sppbd*1 /tm +wpshere?