State the law of conservation of electn,yaa-o uwyi 9r-5) )t abwlt8ric charge.

  Is it possible for two negative charges to a ji,8vb6ufv8 9qy3jpettract each other?

  Is it possible for a pm 4xis 2hxj5k:52 imjsositive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod t,:cir7 ohn1hacquires a positive charg1o7 nthr ch:,ie and the silk

  A proton carries a

  The model of the atom sho0+1pfhzm+j 5 qf 7eauvws a

  A neutral atom always hasuyy +l9)caj; q hfith 27p,0( sri.7dron+vmo

  An atom has more electrons thanoxauh3 *;tm7 ,5ypj sl protons. The atom is

  Materials in which te8 64dxtsjo+ehe electrons are bound very tightly to the nuclei are referred to assd6etje8o4 x +

  Materials in which the electrons are bound very loosely tsg0 ;q y xwh /tes:;53ccrve3to the nuclei and can move about freely within the material are referreets /cesv wht5q0;ygc3; :rx3d to as

  A negatively charged rod is brought near one end of an uncharged metal barz:) /wihic;nz;wp :mz. The end of the metal bar farthest from the chargec)pn/wizm zh:i :;zw; d rod will be charged

  Sphere A carries a net positivkg5 lae2 oz x9gw-.jf2p pi/u.e charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire thf2xej. i/wp z9gokau5.p2g l -at is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively?u.l)ub1ev s: i

  An originally neutral electroscope is briefly touched with a positively c wm xy1 wm37+g+1y5bshcedhb:0j io ;eharged glass rod. The electroscy 0hmo1 :5b+ ;1wb7mdehye +xw cj3sgiope

  An originally neutral electroscope is grounded briefly**ajzn0 63 b*nuv wc y2c*xvnf while a positively charged glass rod is held near it. After th* fn*c w0z3*vauc6y vnx n2bj*e glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the l*:ulqc 7qn,lc;nit 1se i0 r0peaves separate. Then a negative object is brought neans00clpqrutnei:i ,;1 c7l q *r the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulzp(e27 b8 vpqfvn z;,wated table. A neutral metallic ball rolls straight toward the object, but stops befopefnw(v,7; 8pz2qvz bre 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 is the final charge on each ball?

  Charge is

  What are the units of the w 6p ic66r+2i lkv6uhuf hf6,vCoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are ,is t*vx;bp ndxhi;ff- 5 m*tgedk;,(separated by a distance d. The first charge is larger in map d,ftsxvib, t; ;x*eg; inf* -dhk(m5gnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are p)zj 4 gryepp1d x ie;1)u:ne hc;e6eb;laced near each other on an insulh;c)6d ;)yebnzu p ge:px jee4er1 i1;ated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain fo6g. kqhki0qnd 4amq93rce. If the charges on both objects are doubled with no change in separation, mgnq. 0 aki3h64q9k qdthe force between them

  Two charges are separated by a distance d and exert mutual attract5h7t zeyhq 8 2e cal57 su4g4emvoe0e-ive forces of F on each other. If the charges are separated by a distanceml7hy48-g c hz702e554ee esqtaovue of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What ha0f2rxxpq 1lap,wb. t6 ppens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced xw6rlax,. b 02pt fpq1to one-fourth its original value? The force is now equal to

  An electron and a proton are separated bj+1kd: ;uqy nly a distance of 1.0 m. What happens to the magnitude of the force on tn;kdj1u:yl + qhe proton if a second electron is placed next to the first electron?

  An electron and a proton are separated4b50q ocvtte 3v fzm s3fp2.t: by a distance of 1.0 m. What happens to th:0 fp4c5.tfvetvsz33to mq2be magnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a did6fm1 9 :1omu5wvhdg xstance of 1.0 m. What happens to the size of the force on the proton ix dw1mf9g: umv 65doh1f the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squar chyy( (-nwc8ie. When a second point charge of -Q is placed at one of the square's corners, it is observed thatchn ciyyw- ((8 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 placed at the centrode y:406a khjiid 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 thi e:k4hjai y06drd charge of +Q placed at one of the other vertices?

  Which of the following is not 5e4mfyzheb(/ )ng l;aa vector?

  At twice the distance from a poin93zt0ok9h-o 2zwpq: d g1v1i pj aq;vlt charge, the strength of the electric field

  Is it possible to have a zero electric field valkuqcs;u+e o* 9 n++:j t7gfltvue between a negative and positive charge along the line j t;ne q7 + +guojtc9fsk+vlu*:oining the two charges?

  Is it possible to have a zero elecdvp9l01a1z yctric field value between two positive charges along the line j c1l0z9dyp 1vaoining the two charges?

  Electric field lines near psitive poinp m 5g9r b5r9z bit5hwm5p13fet charges

  The electric field sho)iq5w(; )k 0k+wtscy0wdj2 fr,w d ogwwn

  Can electric field lines interjgbiys h-n 8h.u1+q1rsect in free space?

  A solid block of metal in electrostatic equilibv/5im3w7g lrowy67 n:yjk bi9n k;gm9rium is placed in a uniform electric field. Give a statement concerning the electric field in the block'5wmg369r vk7:gi wly;j/m7k9 obin nys interior.

  If a solid metal sphere and a ho85f3b vpe u qma+:r cq9l;a0clllow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surq;rfal q5 93 8cme0:a puvcl+bface is

  A cubic block of aluminum rests on a uhp4lm :a5k 5sczzl epv8tpj2o0)6i1wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's to41ec5m0p) h2uslz:z pl5j 6ip oavkt8p surface?

  If a conductor is in electrostatic equili,zjzu 9 se 6815oah-3dq zqwzzbrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is gri d) vffv,+-p.gov:ig ounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere ha vv,ff+-g:iipg.o) vds

State three properties of conductors era.dlc;:(xoie mvx+* ol x/ ,in static equilibrium.

State Gauss's law.

  The charge carried by one elec;x ldsi dnfi54)+uqf(tron 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 netk/ yl:,6u+vhbvous f: charge of +2.00 mC. How many more protons than electrons does thoh syvfu/:6 b,:kv+l uis piece of plastic have?

  What is the charge on/ jqx-1ekk1xwlitz if.s,6)m*uv xk / 1 kg of protons?

  An atomic nucleus has a 0;:qnf p5f) 9dxo.n2d s9ck fxrjn (vwcharge 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 values of 2.0cp-f- + 1a2 a7 4v3zovsbfeyss and -4.0 mC, respectively. What is the magnitude of the electric force between them?+o7-zybspf32v4ses-v 1 c f aa

  A 1.0-C charge is 15 m from a second charge, and the force betweenk01flhrp(eg*y3 p oa;icg4+v them is 1.0 N. What is the magnitude of the second charg31irf4pyol0p+* e (h ggck;ave?

  Two 1.0-C charges have a force between them of 1.0 N. How far apa5pr 5yt6(6skd4a wmd a2tr2rart are they?

  The force between a -2ozn4aj 39zhd)o wv3 qh du;;, wmkia$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apiv2(( qeoow1bm:l 2snart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, wo:wmsoiq v2lbn( 2e1(hat is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The ficgqxp-c 2yg+ 7c:hq8h rst charge is at the origin, the second 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 th cpgc-:c+xhhqg7 8qy2e origin?

  Three point charges are placed on the x-axis. A charge of mn8w8 gf cq;w6bnxx69+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 magnit86f 6q8ncb9wnxmg ;wxude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at t.rq *cv1r4--(knu ycq)z hjgfhe 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. c k ug-)vf*j-q1 n(rc.y4hrzqWhat 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, andkl-*bms 8w3ro a second point charge of -Q is*o 38ls- wrkmb 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 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 (0.3wk l4f;bxcj7+q q: ij+0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the mag:+f li;4jqjc +qbxwk 7nitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0np i6g+frb*z,(e- aag.10 m); Q3 = 5.0 nC is at (0, 0). Wn,-ezbg a6( a*rpf+ighat is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral acd7i1b:/ddk triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force whi1/idd:bc k7ad ch acts on any one of the charges?

  Consider point charges of +Q and + 0p 37ed-xdstk+rrs,s4Q, which are separated by 3.0 m. At what point, on a line between the two char3-s+sdse 0x ,rrt pkd7ges, 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 thnf9 h ,fyat( y )ty48wpxzc6/ne origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a thi9)z8ayw /6fctp4n(xyyt,h n frd charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = sys:l (xiicbb*j/ (mece94( n2a. Where can a third positive charge +q be placebx*(cni4ij/eb ((:ye s9sl mc d so that the force on it is zero?

  A copper penny has a mass of 3.0 g.q ts tt*(,vj+ble+d)x 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 fixety.xyf+b,8 rw as.00htx 8vkpd prya8tryv,p.x8bst0w+x.0 fkh oton 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 th:*stb l wr-j*5y8ndpb reads which are 30 cm long. rt-s8b l b*n5d *:wjpyBoth 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 ofllbszc1.je(p 2 i-+ s -duzgc2 +40e. What is the magnitude of the electric field at a distance 2-j1ec-+dblglz2p( s z. icsuof 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a o v2wfh8u9.wayf. vy wi(*(gv n4 a37 n/oflhndistance of 1.50 m from a v7. nuwl 3 9(8.(4vfohonwa ff 2wg/n h*aiyyv50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of j )kxj83(zp rvio1.b mthe electric field at the lor1z .m8)jxvobpj (3k ication of the test charge?

  A 5.0-C charge is 10 m from a small tes,z5lb-n a 3d p, bb+cs81szmvkr f7j8pt charge. What is the direction of the electri,fb7mcrd s-8z3+ pnvs ,l5 8kjpb1bazc field?

  A 5.0-C charge is 10 m from a small test charge. What is the m4 71-t +tgt:ocmyojm magnitude of the force experienced +ct:m o4j tm1-myog7tby a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and axs/i 6i cg:df7re separated by a distance of 4.0 m. What is the electric field at a point midway betweenx 7/:gfsci6 di the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick rq5stwrw+ lf+5ndg 0t/oy9 s -and a -4.0 mC charge is placed at the 50 cm mark. What is the electric /9yl+ogd rt ts5s5+q-0wnwfrfield at the 30 cm mark?

  A 5.0-mC charge is pla26yw84zyixyrg-zqtgg )jzo8 gs- (r6ced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 g)y trgo jzz8(x r-2 686gy4 zwyisg-qcm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.06*4qp q)rcf4 20ch) ci ohdxob mC are placed at x = 0 and x = 0.20 m. What is the magnitu6cpx hqfriobc )2*hco4d 4q0)de of the electric field at the point midway between them?

  Three 3.0 mC charges are ad q1xa*( ajp)gt the three corners of a square of side 0.50 m. The last 1adpa xg(j*q) corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is5z;8dwclv:i o z .dnf2 1.0 m 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 (0, 1). What is the magnitude of the electric;vow2dzz n5 8idl:.cf field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in +., 5bbe j;2sna nvwx64fw ofna uniform electric field. What is the magnitude of this electr25w6f 4;bo+bnx an,j ne.vsfwic field?

  A particle with a charge of 4.0 v9n2*xhtw sobl18:j7k ;t3(e y cmsxqmC 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 placl r k*k1 )qgr nmcf6p3ss(u77ped in an electric field of 6000 N/C pointing downward. What charge m3s7rp6ml1*kgcn f u7r(k )psqust be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. njw ns (01 t8e cmu5vcewg8r+: 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 18 ceuw+t(nmev cg8 rw0jns:5electric field?

  A metal sphere of radius 10 cm carkw /w0kacgvzx)ct*8,9z 691 wnsr okt ries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surf9voc/zkcwww n0sk96z8t ,* xg ta k)1race?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is a0wl7hb0y(zx b48pq4 cewkc)the electric field 6.0 bakczb)7cly0(44 hwqew0 px8cm from the center of the sphere?