State the law of conservation of electric char;5f ) t5olx qrdc9o5plge.

  Is it possible for two negative charges to attract ea2c ir/j- 1n jsrj:m p0:ovjnp+ch other?

  Is it possible for a positive and a negative charge to att6s2pt sh 0jy0iract each other?

  A glass rod is rubbed with 9dg k( he+arisogx)+ m5 izb.*a piece of silk. During the process the glass rod acquires a positive charge and ti bsgak)ehi d 9x5 o++.zmg(*rhe silk

  A proton carries a

  The model of the atombh 1b4 *xbam-y shows a

  A neutral atom always ha q02,pqs05q b xmh(eojs

  An atom has more electron+7avyw 7fpz5 ls than protons. The atom is

  Materials in which the electrons are boun v8 sybl/y6e3od very tightly to the nuclei are referred to 6ov /y 3sb8elyas

  Materials in which the e9hkn6eiwro 0tt6y * -blectrons are bound very loosely to the nuclei and can move about freely within the material are referred to w k*riey6t0 n9hb-6toas

  A negatively charged rodcuy;tw5) i.t q is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rqu)5.ttw; yicod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Thjuz: c,s)r6+v+a/z8p . a3i*d+ ifjvtl qgv erey are placed nea +3vdqiv zi8p jj )er 6la f+.a*/tz:v+surc,gr each 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 electroscope posit:u(yjms y4f zn+9bwi6d*-b zt hu 6pk8ively?

  An originally neutral electroscope is briefly touched withtj -a.u./uhaq a positively charged guqjta/.uh.- a lass rod. The electroscope

  An originally neutral electroscope is groundej8vbl 0vn(ykrs+ 4)uq/rax-ed briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroskv-xe+4vnl)u(qs r0/ 8rj ya bcope

  A positive object touches a neutral electroscope, a , oo-(k;g u;q3:ytzpd,mmydsnd the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the leo,qytz3musy :-o m(;p k gd,;daves?

  A large negatively charged object is placedy d3tv be:j-7r 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 stops. The first ball rolls forward, but does not touch the negative object. At no time does either ba3ejr7 -v dyb:tll touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb caovdh 6mh 63e9onstant $k$, which appears in Coulomb's law?

  Two charged objects are 8-s9m w8cjysyseparated by a distance d. The first charge is larger in magnitude than the second charjcyy ss 9-88wmge.

  Sphere A carries a net chax1+(dt2g 2i vp5egdv srge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force b1 pive2(+ sdgtgv d2x5etween them?

  Two charged objects attract each other with a certain force. If the charges or c60jfwg/j9cc s .2r89uqfnin both objects are doubled with no change in separation, the forwqu998f2c /c06cfgj rnjir .sce between them

  Two charges are separated by a distance d and exert m/2u *i *iagur.plur 9outual attractive forces of F on each other. ou9 a *r2/glu*.ipiur If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each ot9wsvwux951awzrv+n j4dl w83 her with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one-fourtv8z4j u 9 +wwnd1 9w53rxwlavsh its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happens tow,0b7mav,t; of uw,wm thewt,o0,mf; ,7w wvbmua magnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens to,u qy.idz*wt- the magnitude of the force on the first izw,*y qut.-d electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What ha, q b1xt hqi9sb*x5yo*ppens to the size of the force on the proton if the electron is moved 0.50 m closer to thb qx5i y**hsb, o9tq1xe proton?

  A point charge of +Q is placed at the center of a square. When a second poia +ouj qokbk) -.kzw3gnf/u+0nt 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 charges of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic force actin)-+ fu0zubkk gnj/3qo.wa ok+ g on the positive charge at the center of the square?

  A point charge of +Q is placed at the centrf /q8hkm m3xo8oid 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 forcex m8o mq3k/8fh that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the followingrl,v9+ opq kr( is not a vector?

  At twice the distance from a point charge, the strength of the electric fielojc lk1w a ii xkgs 994v*ai+-6*ca9wsd

  Is it possible to have a zero electric field value between a negative andj12rc*,ruxjbo cdop ci - 9q09 positive charge along the liuxqj,c9c r2-r0i9j * opd b1cone joining the two charges?

  Is it possible to have a zero electric e: r4ma *topnavj 7h+,field value between two positive charges along the ho4vj+:ate a, 7 *rmnpline joining the two charges?

  Electric field lines near psitive xq b,;vpba1w1 ;hrpe0point charges

  The electric field shown 31jj:u c buuj)kd,:ea

  Can electric field lines intersecfe gv0s gaj(wo8 8m7:tkoda3 k:8s t*et in free space?

  A solid block of metal in electrostatic equilibrium is p*1,6r 1,yy)ey2ybd xq pylvs placed in a uniform electric field. Give a statement concerning the electric field in the block's ispl 2y1,vpxqrb e,y*61ydy y)nterior.

  If a solid metal spherep5y sm1a5fo ;m and a hollow metal sphere of equal diameters are each given the same charge, th5o1ya5 ;fmps me electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a regi8g r0mj09qr xion where a uniform electric field is directed st8jqigr0mr0 x9raight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibriudt52d , 24:cpmiliv eyf .tg,tm near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grou7;ds-rowj f- +mmj -gonded. As compared to the case without the hollow sphere, them+d-;mjoj-wr-fos 7 g electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrai*btqq6)( ah2rd1vxs enu)0q zw p2- ium.

State Gauss's law.

  The charge carried by one elect3ac i++fr h klzrs1k97ron 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 char,+ncfr 2gu4 mm3f emm(ge of +2.00 mC. How many more protons than electrons does thgfc34 r mum(fm,+e2mnis piece of plastic have?

  What is the charge onxtn;,y r1bg,*e;q -1vy chcmf h 3cmd4teu6.z 1 kg of protons?

  An atomic nucleus has a eag/hsn o3t,h7cw y ;qk6f ju;4ed,,acharge 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 vqjele3., xa ft7bqk(. alues of 2.0 and -4.0 mC, respectively. What is the magnitude of the ele ejqfxt7 (q,al3..ebk ctric force between them?

  A 1.0-C charge is 15 )lmctg(uz we )+3g,+tb z oq/cm from a second charge, and the force between them is 1.0 N. g)(zzb/ ecg, l)t3uo cm+t+qwWhat is the magnitude of the second charge?

  Two 1.0-C charges have a forczm tw sgg(k*)s2eu,w chg*80b e between them of 1.0 N. How far apart are they?

  The force between a k o1eq 4zdd 5vo+i6t eu+kud:4$30 \; mC$ 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 forc ,lb+ 0yw5 guwxijqola)53b/ne. If they are movedlxa)+g3wou ,nq5 i/b5w bj 0yl to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. btizj1jv00p*The first charge is at the origin, the second to the righ1jtj*i 0p 0vbzt 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 the x-axis. A chargc6ty )t;tug;; k d7j.pe )*y;lozo dese 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 magnitgd ttoeyc.y *ozpt7)ue)j s;; ld;;6kude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at02ts, qd5h/i d enuo.c)okas2 the following positions: 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 forto. qadu i0ho/,25csk n )d2esce on the 3.00-mC charge?

  A point charge of +Q is placed at the centdd a,du bg(28pi;g85kkz wb 0ler of a square, and a second point charge of -Q is placed at the upper-left cog8bd gw ud5di;(8,zkb0ap lk2rner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the center. What 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 = -iongfrs272l p w 76pz+be/9oq1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude bswpeo2 +9pinr7o 6q/ fz7 g2lof the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is vn9d fy ntli 3w9u8q ds7f(.e;at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What isfev(3qd; 9unl 9ift wy7dns8. the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices ohxc-k4alcj 7 (f an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one jhaxk- (clc 47of the charges?

  Consider point charges of +Q and +4Q, whic zynq*zdy9 4p4/qbaq60ycr1v h are separated by 3.0 m. 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 onar1 dy6z 0vyb4c4 qqpzyn9*q / it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge -lalzl4tvm. uq:/)q-bso2 zl is at x = 4.0 m. Where on the x-axis can a third charge be place)sol4:zlt ma b2--qz/ qul lv.d so the net force on it is zero?

  Charge +2q is placed at the origin and chargefms k+6 w0c)w z+o5qe-dx tt8 4gpk4i p4eyqg) -q is placed at x = 2a. Where can a third positive charge +q be placed so ktyqw8 edx4 fkt+)s0ieo +6-gc mwpzq 4)p 5g4that the force on it is zero?

  A copper penny has a mass of 3.0 g. A fo f(5dz 8.s/:mutadka: qhc.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 forceh +sbzi1 c(xy2 of gravity by the attraction of a fixed protx2bz y(ish1 c+on some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a commonnxfphd6jz c7 39;wm+ d7 qwp5h jvg2h: point by nonconducting threads whi p;wq6w+: jxjp 7df 3mnv9hhhgzc d257ch are 30 cm long. Both are given identical 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 magnixsb xc; ohd608tude of the electric field at a distance o c6osbhxdx 0;8f 1.0 m from the nucleus?

  What are the magnitude and direct +f+w5rgnpwwdsv-u 09 ion of the electric field at a distance of 1.50 m from a 50.0-wugrw+ 9p s-v+0nd 5wfnC charge?

  A 5.0-C charge is 10 m from a small tesn 0w2 rrs*j dkiw324lxt charge. What is the magnitude of the electric field at thk i2d0r24rl *3j wnwxse location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the d3/6terk 8njfmxf5t 8 uirection of the ele8/e3nxfj 8f65r tktumctric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnituur(2l *vqea6)bp (x kcde of the force experienced by a 1.0 nC charge )(ebqacp u xv26 l*kr(placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated bd wnnor2t lpz+qs,88 eb (fs1al 5o.d5y a distance of 4.0 m. What is8( d.nz d5e+ os notp5f28s,qbl rl1wa the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and akd1, vbd,t jc- -4.0 mC charge is jk,tvb-1 c,ddplaced at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.*qs nbh)jt5* e0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is th5 nseq*) t*hbje electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 rm/bv4e p9*tei(3hs bsl b +1sm. What is the magnrs*s plv(e sbh1ibbm+3e t49/itude of the electric field at the point midway between them?

  Three 3.0 mC charges are at t fxs-lry zo.5 m1d1(bdhe three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.bdf md.syz1o 51xrl -(

  Consider a square which is 1.0 m on a side. Charges are place)vnd .i sjqleln5 ((rhx z.6uazdn2.+d at the corners of the square as follows:)z n h.q(znl6u2 x+dl(.dvj.a5 s enir +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 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 ins)ir *svu:r9 b a uniform electric fi:9bivsur s*)r eld. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass j rsd2p1 nnb; a;c5lj3w2nr)v 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 2 y2:obe 4btgwis placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be ybg:2e2b4 tow suspended?

  A foam ball of mass 0.150 g1j va,z)lr 8el carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. Whv l1l)a8jz ,erat are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of y*v f :/:gwza*dmnvsnl2lg2, +2.0 mC. What is the magnitude o2,g2na:/ fwv sy* :lz*gmlvdnf the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 ,b ll a39 uqb2x7- bnde7v.usdmC. What is the electric field 6.0 cm from the centa, u9 elsu.bbn3x7vdqdb2- 7ler of the sphere?