State the law of conserva9m v a;vs28mpf+p;rs;cm+ iwrtion of electric charge.

  Is it possible for two negative charges to atjhdb,6 /m+prvn1t2f vtract each other?

  Is it possible for a positive and a negative char :* frx;cfzm9qge to attract each other?

  A glass rod is rubbed wv9o2dd.,ly ac ith a piece of silk. During the process the glass rod acquires alyd,oc.d 29va positive charge and the silk

  A proton carries a

  The model of the atom shfkry:h f*v.-tr7mo r5sk2 is 3ows a

  A neutral atom always h z 23rjahl* m6pq*,u2kor*n*oi6ky lcas

  An atom has more electrons than protons. The atom e clo 6s)g ek6fwz; ql2-al;5a,s8pe eis

  Materials in which the electrons are bound very2jk y w -6aajtut77fqajwj m) s0*k8v6 tightly to the nuclei are referred tjk8a6ukt-7) j f2qaa *js0 t6y7 jmwvwo as

  Materials in which the electpkyo-spm-o. g9z6f+ p rons are bound very loosely to the nuclei and can move about f6o.k-s -pgpzo f+pym 9reely within the material are referred to as

  A negatively charged rod is brought near on*(ql 2quzw0p we end of an uncharged metal bar. The end p2wl wu(qz0*qof the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. The042wx/ zhcztt y are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statem2w0t/h 4zcxzt ent is correct?

  How can a negatively charged rod cuz cspp,j g4h4 -4fq-hharge an electroscope positively?

  An originally neutral electroscozc,c-qt rr/:p pe is briefly touched with a positively charged glass rod. The ptrc:q/r , -czelectroscope

  An originally neutral electroscope is grounleb.2ea :j9so.o h e)tded briefly while a positively charged glass rod ij t:2hel.s aoe9o.eb)s held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral 4q*ev tve kkr)wh)mxo;,i55 melectroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to )mme54te r; ov,vwik)*5qkxhthe leaves?

  A large negatively charged object is placed on an inj e3g0 is1if-:cuth3nsulated table. A neutral metallic bal0eni 1 :-i 3ghst3jucfl 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 is the final charge on each ball?

  Charge is

  What are the units of the Coulombx wulrg 1/u;9/bxzy0g constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The f4ntvkysa z-d+ 7ojn)x/jn n+n:b/f7i irst charge is larger in ma7 n/b in 4-7nj)vxnny j+ ds+tko:afz/gnitude than the second charge.

  Sphere A carries a net charge and sphere k( ,b*0;nq(fl )ldpvhb49 plbvg;j ui B is neutral. They are placed near each other on an insulatkb; u )bgbj(dl; q0p(nlhvl*fp4 vi9,ed table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If they(9:oeysgh*d: mc )tg charges on both objects are doubled with no change in separation, the md :yo tg:g)yech9*s(force between them

  Two charges are separated by a distance d(q 2nj*s* axkwlv*:byb07v0 pvtz+la and exert mutual attractive forces of F on each other. If the charges araq:lav j zp bs xy*vwk070* tb2+n(v*le separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens tgs ee7rx(2h0s o 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? The force is nrhg7x sse20e(ow equal to

  An electron and a proton are separated by a distance of 1.0 m. What hap5qsm42ij xuiaj+ s/r*6 ryd :ppens to the magnitude of the force ona+xpd:j 2q4sm r/i5 iru6jy*s the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated bys 05 sydcw zh:2it5xb6 a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electronsdti:zh2b 5wx5cy6 s0 is placed next to the proton?

  An electron and a proton are separated by.oc8/tqwb0ft a distance of 1.0 m. What happens to the size of the force on the proton if the electrt fo/ cq80b.twon is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a sx izp7pw5jp. :1 0mo*vfl8it eg-ccg:c)ek m4econd point charge of -Q is placed at one of the square's corners, it is observed that an electrosp 7ci wxzlf -.i c4mp::t ggmvk1pej0o)8c*e 5tatic 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 centroid of an equilateral triangle. Whenl6gyh* iufb t4 3gbtbae0j4xz6/8w8z a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4bbl3eftig84/* ztb6g 08z6auh wyjx4.0 N acts on it. What is the magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is076a l vlwfc.f not a vector?

  At twice the distance from a point charge, the strength of the electric fi -/dyxuvk a--seld

  Is it possible to have a zero electric field value between a negative a* 06 yk(m8b p.*wicyrcs0vilqrm:ax ;nd positive charge along the line joining the two 0.8 l yq pr cbv; 06xkwyi*:acis*mmr(charges?

  Is it possible to have 3.jt sa (bdp/oyio9qaov.3, w.atmlk9. g hy/a zero electric field value between two positive charges alo3.. /ot.3pitg b my ,k/a(oqody9l.v awj s9hang the line joining the two charges?

  Electric field lines near psieb;g3/ vbja.,4 zr7jj q)cc dbtive point charges

  The electric field shdr+ d9rqc;*km +u:w z0zn /xjkown

  Can electric field linesy5(6m62uz ba ssjo :oi intersect in free space?

  A solid block of metal in electw+60r r aoif ggey9e)qes20:qrostatic equilibrium is placed in a uniform electric field. Give a statsa)gg eeif6yqorqe:0 w2r+90 ement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diametelk5wi u6um:mi hf-6l,k+ enu1rs are each given the same charge, the electric field (E) lk 6ei6u1lm kh +iuuw5n:- ,mfmidway between the center and the surface is

  A cubic block of aluminum rt9s etxmv9 itv-9eh(fw6dt .*ests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge.-s t *v99i9tfvwh e(6mtd xet on the block's top surface?

  If a conductor is in electrosuh-nw f7va2 g1tatic equilibrium near an electric charge

  A positive point charge is enclosed in a holj+3nh jnbl x62 7rini*low metallic sphere that is grounded. As compared tn rnjnji67 i*23h+blxo the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibt07at 47gou1u*yqwei rium.

State Gauss's law.

  The charge carried by one electronq0i7(fpzoy dn:f 7wr 1 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. g:7vla/dxs bwu ;/s(c How many more protons than electrons does ; abuvx7s :c/(/ws ldgthis piece of plastic have?

  What is the charge on 1 kg of protonb wq 9yh.;skiv9gfh1k;pm +-vs?

  An atomic nucleus has a chare up ngx,2;eo9ge 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 1 yu-,i hr7*ogx- vbv)5nhoyf, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force bet7u *)froyybxh1-i,o v5gh -vnween them?

  A 1.0-C charge is 15 m from a second charge, and the force between them i .n5dubre z,gad.o7.is 1.0 N. Whzd.roaneiub . .5 g,7dat is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apa)vndk 8l6ay) ks1du0j*lo* rfrt are they?

  The force between a ;srp)vbf:j4 1v k )odz$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, ef3 lv nr+gqh;e qxov p.78f9(axperience a 1.0-N force. If they are mov3va lfqf+ r(p 7eo v8;xq9g.nhed to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point9q x4frbqwnfz2 e7c; /rm5ku7 charges of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the third is at the 100 cm mark. What are the magnitude and direction of the electrostatic force wh5m /b7 q 2uxnffqk 7;wcz94errich acts on the charge at the origin?

  Three point charges are psf9eb clmwf1+th n+0/laced on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the rig s/wt+lf9c0nfe+ b 1mhht at x = 50 cm, and +4.0 mC 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 atw a*wx/zs4g4 c the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.ca 44xws/w*z g00 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 squakldbxb;*gl )u2 ar9-qo7lr n-i11c)u arvmb* re, and a 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 the force that acts on the center charge if a t7r1ad-n;ul - *ar *bg lbxo)u)ck9mrl2bv iq 1hird 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:/i 7 jb13upbmws8; jb3elcti m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net forc7ij83;bum1sl /wte:bi pj b3ce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.3bjq mz -ea)caciy):ccoh4/9fn f6( y80 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5. qe8anzf)ybcc6h yoic): / 9-fa(jc m40 nC charge?

  Three identical charges of 3.0 mC are pt3m av 5t*zcqyh 12pz/laced at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitudzq5/1 vtm3 zhy*t 2cpae of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which areay2fz mz5,4gd */ (iyi(upuzg 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 electrost,i4gudfi 2ua (5zzp(m/g zyy*atic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C chahi6 ojg2jho1; rge is at x = 4.0 m. Where on th1jo i;hg6j2 hoe x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the originchvn6 r:,q(p*f( zmc b and charge -q is placed at x = 2a. Where can a third positive charge +q be placed soz:r6* pvq(b c,m cnhf( that the force on it is zero?

  A copper penny has a mass of 3.0 g. A t1,o mq 5j.*9uirf szgy6 gtz-votal 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 attr*3 ue1ra i+;d0 zk4mc*aarqlx action of a fixed proton some distance above it. How far above the electron isa4+e *idkrr u01z;x*mc al3qa the proton?

  Two 0.20-g metal spheres arw(61ke;yh hf o 0ia;mme hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until th mihy6 ;f1h ;kew0(moae angle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of lja drcgslq329u/x 93+40e. What is the magnitude of the electric field at a dis 3 d9/sqg3ljalu 9r2xctance of 1.0 m from the nucleus?

  What are the magnitude and direction ocm*bzqos d pr g0,-gd,k:5w1gf the electric field at a distance of 1.50 m from a 50.0-nC co,:p-cqwbm 1z* k50gdg, dg srharge?

  A 5.0-C charge is 10 m from a small test charge. What is the m dhfk*f48)tht-sl4r dvbl:z 4 agnitude of the electric field akh )fd8 *vbl f-t4zr:ths44ldt the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of the e4o*f3d1hkls:vvkc : 0q1z( ry x3jfodlectric flxy k*kqofd( v3z10 :j hc1 4do:3fsrvield?

  A 5.0-C charge is 10 m from a small tesrve1gz ttvkq 543l92kt charge. What is the magnitude of the force experienced by a 1.0 k2 gtq14vvtl9k5r z 3enC charge placed at the location of the test charge?

  Two point charges eacnwxt1rr9j7g/9m; vd bh have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the t9 gtdwbj r;mx91n r/v7wo charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stn7kc uh(h 5vmenk et76*9m ea)ick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the emth k7a95m )ku enhne7* (6vc30 cm mark?

  A 5.0-mC charge is placed at the 0zr)-s9aj;6 ( thcuy1iv9 4lref. mili 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 thv;9ra eju4fhcy mi-sz6l. i9) ri1l(te electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. Wf qfx 5+x0ki-wzn )y;mhat is the magnitude of the electric field at the point midway between m-xx yqfkw )05z;nfi+them?

  Three 3.0 mC charges are at the thrh x)(x6hcqr8 uij ik/5ee corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Fihuxi(/ri5chq 6 8x )jknd the electric field at the center of the square.

  Consider a square which is 1.0 mzox)k5 ii4b .-i/yc ow 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 (c) 4z-ikoxo/yi5 .wib 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 in a uni2kttzgrdiz o 3 up rw/5 ((iz6-bo.n-oform electric field. What is the magnitudi wbpz.3u-dz26-5koto(ti/gn z (r roe of this electric field?

  A particle with a charge oeqp: p./haluyl.-bx (f 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 an electric field of 6000 N/C poin( ccytar. 3edj5/3vvzting downward. What charge musy /vrzta j5e3d3(. vcct be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a +wg*ta/adl +2c yt6qwcharge of -2.00 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 electric fieldqltd a* /t+wyc6 2a+wg?

  A metal sphere of radius 10 uvkkn1u8 p6ssj1e4(g cm carries a charge of +2.0 mC. What is the magnitude of the electris1n 6 j4eu1upkv8sk (gc field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 ulcz3hg/4 oaj b6au8( mC. What is the electric field 6.0 cm from the center of the sphe4cha( l6a/zugb u j3o8re?