State the law of conservation of electxe1y z gop6c x4 /.lb9nfwko54ric charge.

  Is it possible for two negative charges to attrwr /miiiiv na59,k +s)act each other?

  Is it possible for a positive and a negative charge*yosl6fy*66sv1vi *g najn9 m to attract each other?

  A glass rod is rubbed with a piece kku yf 3b;w-2oof silk. During the process the glass rod acquires a positiv bo;kkyfw2u -3e charge and the silk

  A proton carries a

  The model of the atommaq j (h -/r5o44c2lofbpux1f -z jxf+ shows a

  A neutral atom alwaysvdyf c r;)8c+/+xoeoy has

  An atom has more electrons than uu/9e9;,*h - a yluqlp(usepiprotons. The atom is

  Materials in which the electrons are bound very tb sa,e. 3jp2lwightly to the nuclei are referresjp .b e2,a3wld to as

  Materials in which the electrons are bound very loosely to the nu-x y 2txt )bhjqskqqc9 +;d9r cw8i5,uclei and can move about freely within th9cq 5+r,cktsixtqyd-) 92jqw bu8 ;xhe material are referred to as

  A negatively charged rod is brought near one end of an uncharged met 0f z0q5qs8*vl sewdz/al bar. The end of the metal bar farthest from t08zq0ld5/fwz * e svsqhe charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is;ogp aa;y9;2yo 4; ahmcy g-vs neutral. They are placed near each other on an insulated table. Sphere B 2 ;y;9aympva;ysoh-ca 4 go;gis briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electro5/evsa ; k /qh9f9*as7i tjrilscope positively?

  An originally neutral electroscope is bri1o-uy r*,m-z ebu2furefly touched with a positively charged glass rod. ub1,y*r um2o- -uezfrThe electroscope

  An originally neutral en+sr i ,z tfdy03q,bh0lectroscope is grounded briefly while a positively charged glass rod is held near i ,hzy i0 +nt,dsrqb3f0t. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepayml81o8:ubr p rate. Then a negative object is brought near the electroscope, but does not touch it. W1:b8l rm8pyou hat happens to the leaves?

  A large negatively charged object is placed on an i8 10q uv7qphupnsulated 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 foll q8p7huvqu 01powed 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 is the final charge on each ball?

  Charge is

  What are the units of the Co:7r/lrnp6l;* soofxzulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Th,pcf- /sp0lb xe first charge is larger in mbp fp,/sl -0xcagnitude than the second charge.

  Sphere A carries a net charge and sphere B is nepkj*h0h p4rr+ 6q dch80gni0xs 9+r ffutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic for4 ixp8q0c+f0 s rfr*hp6h+0ndhr kjg9ce between them?

  Two charged objects attract each other with a certain forcunxfs gj n zaum*.o-w,8jug x5)a2;z4e. If the charges on both objects are doubled with no change in separation, the force between themg z,*juuazx8ux-j;a f24mog n w)5s.n

  Two charges are separated by a distance d and exert mutual attractivaw0(g kb(t/ *d60mgh xda9b kiiz 5l1ue forces of F on each other. If the charges are separated b*abgizd (x/wk0thda9 m l06g kib5(u1y a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What e/nyau;uu +k -/3m ;bi stwpe(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-fourth its original value? Th-wmy;e+e;iuusp k t/ 3b a(n/ue force is now equal to

  An electron and a proton are sepa j2 k,e6m3kjyiar 0tgt2s,q w.rated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next toajkkt,y.i q2mr30 e6wt,g 2js the first electron?

  An electron and a proton are seki:5dm 7yh,ju parated by a distance of 1.0 m. What happens to the magnitude of the forij k75my du:,hce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.x z0/ uzdae9qud8kll-( (1hj+z id;xc 0 m. What happens to the size of the force on the proton iz jdi1u/ z hd; cq0x8k((aelz-9+dlxuf the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is xb4lws k5-f7m8lst m,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 charges of -Q are placed at the other three corners of the square. What is the magnitude of the net electrostatic force acting on th4mx-wl tk78 b ,lfs5mse positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equ ef, b56 zlnzl7p4-hptilateral 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 6nb7-f p54t ll,hzp zeit. What 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 a5(wz ofkwns *i1i9nnv7k r*g jp 7v.k, vector?

  At twice the distance from a point charge, the stre; rufx2)- jlpyngth of the electric field

  Is it possible to have a zero electric field value between a negative and pos )rl+4a3rvj;w fy2 nedq /z-wwitive charg vd/2zn y4e-wlj rrw;)3+wqafe along the line joining the two charges?

  Is it possible to have a zero electric field value between tctm md yujh0y+jiw2/t9* .u 1du 5a;ezwo positive charges along the line joining udu. zujmyajd mw/2 y +5ett;c*h 9i10the two charges?

  Electric field lines near psitiv7pa f1lzu 3bo0e point charges

  The electric field shobf 5mur.x;2y9fj;u 0vgb:jun wn

  Can electric field lines intersect in free spawe eq*wa4a5 2-fr(gyo ce?

  A solid block of metal in electrostatic equilibrium is placed in a uniobt335 c dvq b ky))3en;+gnuvform electric field. Give a statement concerning the electric field in tvtvc qb nkn 5d3eu3;o)b 3+gy)he block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diao/;bsinz .cc8meters are each given the same charge, the electric field (Ecso n;zb ci.8/) midway between the center and the surface is

  A cubic block of aluminum rests on a wo97je lr (sz1+q z hiasq5kc43xoden table in a region where a uniform electric field is directed straight upward. What can be said concerni1kizqxr 45jqc(9h3 +s7z s elang the charge on the block's top surface?

  If a conductor is in electrostatic equilibrjf+5jnzmq97pj s .p:jium near an electric charge

  A positive point charge is enclosed in a ho)0 89hql y5: zpxkvyprllow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at l9qrp yk xzpv8)y05h: a point directly above the hollow sphere has

State three properties of conductors in static equi brmt0aol9z (jn: .d*zlibrium.

State Gauss's law.

  The charge carried by pe v)m cm-19py5ge5waone electron 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 ceqotlvia7+wz4)-9 3bnd s0dqharge of +2.00 mC. How many more protons than electrons does this piece of plastic haz lo dqidw94-q)tea nv3+07sbve?

  What is the charge on 1 kg of areci7t5ot* ( protons?

  An atomic nucleus has a u74wq0b za4n d2 j*)sd5cgjdncharge 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 cm7 zh8 mp 7mdz+kwdfsx*frpqdb9-u3(,, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force dk9f zs(+3mdp87r 7qpbxw *mz ,hfdu -between them?

  A 1.0-C charge is 15 m from a secon4/ 53t9crpv d3n tmkhcd charge, and the force between them is 1.0 N. m/r htc 53n43kdt9 vpc What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. H xo2tkb,-u tdxql/w .,ow far apart are they?

  The force between a hd+)fowuugmp)w0wl0+rfm0( m ec;b 2$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apargo5amr ;-9oo;zp cu +5zb7uea t, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric foruzocb au5;; go7 +opz- am59erce between them?

  Three identical point charges of 2.0 mC are placed on the xq ju6)/ xvg0s j-(szqiu:1lhy+z *dcz-axis. The first charge is at the origin, the second to the right at x = 50 cm, an(d/gz+hs61 zijyqx)jv luz 0-*cs: qud 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 ptxby+w/lyy9)mu 2 5qqlaced on the 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) 5uxm w2t+/yqqylby 9 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 located at the following positions: q3hu3f . gh4 431vqexp oi.97ohabw trQ1 = 2.00 mC at x = 1.00 m; Q2 = 3..4grix 1 wpb.haq34 eh93uhtq ovo3 f700 mC at x = 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 poi;dv9tp z*tt6+0n ow ipnt charge of -Q is placed at the upper-left corner. It is observed thatz; 96pp0wvodti*tn +t 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 = -1.0 nC is at (0, 0.10 m); Q3 = / x mv2xumy(fam:.f em028kkp5.0 nC is at (0, 0). ymeap8k22xuv m:/fmkm.f0 ( x What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 8/7nnyyr19 +d leos/zg3t o ktnC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0)y9 /kr8 +7lde1ts/t3noo ynz g. What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at theggb n :i8r8 *n,1gelbkavmi0; vertices of an equilateral triang1lgr0a *i nm,8nv eg;8:gb ikble 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,q/ uo,q0ix62nz,se5lvcsn+m l(h s r- which 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 on it would be rmlc2qx n 50+se ulo,iz6n- vs/qh(,szero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at 0;i 9uoh(+xa wg0b,*ebrupr 3n,cc y+ 5hzlllx = 4.0 m. Where on the x-axis can a third charge be placed so the net forc( 5hnpl90,ru* xu0e cyi++ra;c,ozbhwll g b3e on it is zero?

  Charge +2q is placed at the origin and ch- c -m7dfh 8gmw1qdisk6ji64farge -q is placed at x = 2a. Where can a third positive charge +q be p-ki1j68m 7hdg - cdsfqfi4m6wlaced so that the force on it is zero?

  A copper penny has a mass of 3.0so wgoi:tc:7n5,yt g * 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.4dbxy6w,v + nj:f;9sibc r ad of gravity by the attraction of a fixed proton; b cd n.s9xa:d,ryfj6biw4 v+ some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting ts g:kn9bbki:7hreads which are 30 cm long. Both are given identical charges, anbig:n:7k 9k sbd 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 +mm7 ;gb(e0ozr40e. What is the magnitude of the electric field at a distance of 1.0o bg(remz7m0; m from the nucleus?

  What are the magnitude and direction of the electric fikd . bcio4t2,jeld at a distance of 1.50 m frjit,ck.o2 bd4 om a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test cft5(tgz m+ y00puahv.qz(xae)( l n8dharge. What is the magnitude of the electric fie0.8mz a(ft(h)5zuvld y(q pta+ xng0eld at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charx2o -, o3raks9/0pm, zzgzruyge. What is the direction of the electric ,2rmo/zu3g pk, ya-90sxoz rzfield?

  A 5.0-C charge is 10 m from a small test chq;y ewh r(gi8w/lv ;6dyr( lu:arge. What is the magnitude of the force experienced by a 1.0 nC y/;ir: lhwuevgw 86 ;(rdlqy (charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance c2w: vp 1dz+qa)vp -gkof 4.0 m. What is the electric fie2 +wkzv :dvg1cqp)ap-ld 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 a -4.0 vnip. +bm9 vv/tpr+0,g5ink fmC charge is placed at the 50 cm mark. What is the electri ,vvbgi .k rpi+/+f 09t5vnpnmc field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of 5i:ksun+qrb03 .h dd ua meter stick and a -4.0 mC charge is placed ad0 bd+5ruhus:3. ikqn t the 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 = 0 5ko,+)dozsq m(t rl)u7 i )ucuand x = 0.20 m. What is the magnitude of the electric field at the point q st)uod,)ri(umcuk+zl5)o 7midway between them?

  Three 3.0 mC charges are athk c7-f( 7xh.un*gw4 z,dkb ww the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find dh7*wng- cw hkfk ub,x(z.w47the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges 5*dt r ea9-vtb;ugx,n 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); -3e-nr9at5vbg ut;x,d *.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 in a 5i3n pi/ms7q:k 8n q-7yspulmuniform electric field. Whatl /is7k 5in y8q :-nsm7um3ppq is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has x gw/kt-qbg 16a 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 an electric field of 6000efq 7q,w:d/7cfdw 2 t4x8xqsi N/C pointing downward. What charge must be placed on the ball for it to7qiqw:dfs2 4x fec/ d7q8 x,tw be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.pd/08()ulpc0 bk8/qpuun8 ky vy:fx w00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electri/uc08y 8q/u v(udk0kl)wf8b yxp npp: c field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the-i0tt le34klb 7 )xk+ e;mjkgt magnitude of the electric field 5.0 cm fjk) be4lt7k t exglit+03km ;-rom the sphere's surface?

  A metal sphere of radius :l .c kkrol (ife3is052.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the.:5 (oeiil0ckr s 3kfl center of the sphere?