State the law of conservation xh. tszap4(y(of electric charge.

  Is it possible for two negative charges to attract each oym+-xiyqu( l *ther?

  Is it possible for a positive and a negativf3ebtta6 2px)e charge to attract each other?

  A glass rod is rubbed with a piev8ldw*pc- :ffc 4u b2ece of silk. During the process the glass rod acquires a positive charge and thedcl4p*f u:evw2bc 8 f- silk

  A proton carries a

  The model of the atom s bm 6/td*wi3h:0+8yvhrrc ck8 doyn;ghows a

  A neutral atom alwaysv4l 5k r8o6qfp has

  An atom has more electv:i; mv7qy,0koh,cc va up2 :hh +/dtbrons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuu j(q4:k4bm 24 8g sm/btfwqgfclei are referred to bg f(w44gmqu b/s2q km8j:4ftas

  Materials in which the electrons are bound very loosely to the nuclei and can moxy8oug0 je6d7z(ois d:)g6za veo76uz0z yg)(xi o6gadjd: e8s about freely within the material are referred to as

  A negatively charged rod is brq-kzqc* 0u yy;ought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be char0qzq; - yycku*ged

  Sphere A carries a nt(bv l7wkk ,291ax)ro6q/9wbzj ty s(gg ppa:et positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grot:gy plvw9o q(kkajzr( wg1sbbat62)79,/x punded. Which statement is correct?

  How can a negatively chad .ytkguw(b.uy li,.- rged rod charge an electroscope positively?

  An originally neutral electrosc,k hu2m;c1ixkope is briefly touched with a positively charged glak1 cuh;ixkm, 2ss rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively sgcjbh3+ p 7u ;(sj/ejcharged glass rod is held near it. After the glass rod is7;ejhjjs b u +gps(3/c removed, the electroscope

  A positive object touches a neutral elechwj sj-b:*e )/cbl;s qtroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not toucbwh*js;)j/l e c- b:sqh it. What happens to the leaves?

  A large negatively charged object is placec03/5 am s3qjxv qr(yzd 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 tmcv/qxya r5z(303 sjqhe 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 Coulomb constant1 x;anf sh4m)xml( e.g $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first rnc/9aqrbdvb-,5;c c charge is larger in magnitude than the second char9a5dc;-/ qn cr, rbcbvge.

  Sphere A carries a net charge and sphere B is neutral. Th)ptxapw 4 9sw .4awv8 h q8;yo5eg*uqmey are placed near each other on an insulated table. Which statement best describes the et 8;e ohqqmww4app a5w)sx gvuy98.*4lectrostatic force between them?

  Two charged objects attract each other with a certain force. If the charg q0r so34 ar+ln8irn6qes on both objects are doubled with no change in separation, t +8rnqqlaos4 nr360rihe force between them

  Two charges are separated by a distance d and exert mutual l0iw k wbnj*60attractive forces of F on each other. If the charges are separated by a distance w0 wn06 *kjilbof d/3, what are the new mutual forces?

  Two charged objects attract each other w/+8 u r1.ahjak4cte yaith 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 centta urj/hec1 4 8a+yk.aers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happeer- mr lulyye-/-v;25xtvg,ins to the magnitude of the force on the proton if a second electron is placed- ry;-x2e /t5r ,vgml-vu eily next to the first electron?

  An electron and a proton are separated by a distance of xgs( i+p- :u-*qhxk.dgowg 6n1.0 m. What happens to the magnitude of the force on the first electron if a g(-dkwogx h:- qs+n*upg x6i .second electron is placed next to the proton?

  An electron and a proton are separated by a distances1 s);atmac3/lxi,j ti5 /-(rg pevdg of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0i1stja(gsx rt3-/)adclpv,ge 5 i/;m .50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second9zh,ok3fgt 51 ra x.;ojk zl8t eg+8gm point charge of -Q is placed at one of the square's corners, rao+tgtez958.hokzl,f 1 ;3gx8jmkg 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 the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equlhe 4bv0 )*nt)obgsz )ilateral 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 tb)0))l4 benhv* o gszthe 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 followib+ e+:omh25s dg pdtvr(rn 2r6ng is not a vector?

  At twice the distance from a point charge, the saxw /;u 9f2strtrength of the electric field

  Is it possible to have a zero electric field value between a negative anl.jt de4m7*y ob*4me7kd8 v z9m +yszmd positive charge along the line joining the tw8.m*z9 kdeoy yl4m szdj+bmv4 7e7*tmo charges?

  Is it possible to have a zero electric field value between two positive char1 vx ;:qxcryx*rj*;cmges along the line joining the vq; ;y r1xr* jcm*xxc:two charges?

  Electric field lines nenpg,pdx sl.w/ l kg2iph(k(,*e0y l s,ar psitive point charges

  The electric field shownkrp8m *8 0lvhos1v;zb

  Can electric field lines intersect ad kfe+5pwi;ct ;b f8+ ck,o*din free space?

  A solid block of metal in electrostatic equilibrium is placed in a2um.(tshbd+nu mt qk*s7.)v ; dd r;cz uniform electric field. Give a statement concerning the electric fieldsu vcs.md.rk+7 h*qb;ut(2tm n)d z;d in the block's interior.

  If a solid metal spher7noi te8m9;//cb 7 p 7eoqukfde and a hollow metal sphere of equal diameters are each give7/m7 k/dqn7i;b9t8e eoo u fpcn the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on cj s0ijk --ul1a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning tl ju--c1sj 0kihe charge on the block's top surface?

  If a conductor is in electrostatic equilibri; jby+t (z:n5zqzr0 szum near an electric charge

  A positive point charge is enclosed in a 7j:) 7gv dwpgyhollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directl vdy7:)7pwjgg y above the hollow sphere has

State three properties of conduct 2+hqv3dn0u hnors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is w5il-mu wujj p3bn9ndl+3( c4us1t *n$e = -1.6 \times 10^{-19} \; C$. 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 piw)r2m vjzv 7r)5iek5/f r3txrotons than electrons do) i f7vzvx3 w)5r2mei5ktr/jres this piece of plastic have?

  What is the charge olzci gwt1t m0bmu09-u1o0.dn n 1 kg of protons?

  An atomic nucleus hasa ,41rbqsbllc9sy m+ ilv9lx;ep*3 3i a 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(j+wvibtlkp)4z*f j,- ie ycw-qo ,t 1 values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electrit+, *k-vbl i1jw-j qyioce(fwt ,z)4pc force between them?

  A 1.0-C charge is 15 m from a second charudxrqu x)*e xi *wf;/)ge, and the force between them is 1.0 N. rxui ))w dqxxe u*f;*/What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N./*9s -e5sezmshksywg-/ e1 bx* ug us.v+ (szu How far apart are they?

  The force between a q: d8cnxnt4+wp win0($30 \; mC$ 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 nwx6ye) 5mbzi8lc; )dm 9f4*advi dk *n1rt+f force. If they are moved to a new separation of 8.0 cm, ff45br*w i;cn )aml8*detkx dm)z6d+v ny19iwhat is the electric force between them?

  Three identical point charges of 2.0 mC are placed o.r3vp7pbfhx i iy 97e)n 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. e7.3ibp)hfxy9vp7 i r What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are plac(u7kr5 vyh +a4zo. gu)u9uwzwed 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 at the 100 cm mark. What are the magnitude and 95ao7(whugzyku)zuu +4w . rvdirection of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00lnes+ uq 619ld mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at xdl1 qnsu6e+9l = -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 -ttitu9vkua og2racp 0)3rrg*3 i0g6 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 magnitt3kg 0tac06irpu29 -iovr ggt*a ) u3rude 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 6 oa083low b+k/tzf/hjxh4ys = 5.0 nC is at (0, 0). What is thel// foj waot06 h4s+ bxkhz3y8 magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC32 c86lpfhqvs is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the dir26fqs v3c 8plhection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mbk143uh)/up1s rfj k7-f u+y ,lmfvza C are placed at the vertices of an equilateral triaf ,m+aus 1ru-3jk zvhl1kbf4 /ufyp)7 ngle 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.wwh/ r)ikzz 1bn7 0q2m At what point, on a line between the two charges, would it be possible to place a zwr2k)1nw7 zm hbi0/qcharge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge if y/wq n6absq+hgg+- 0s at x = 4.0 m. Where on the x-axis can a third charge be placed so the hwy-q fsn0ggb+ 6 qa/+net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wherehv.;3 adwrqz(l + u9ouhzqd0(j-oxp. o0ee5y can a thir- z wzj95hvo od(h0;q . dxlay(e0uueq.3p+ord positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0mp,;)rh. q ebo 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 fvu3;xper1g 0 wqcim6 /ixed proton some distance above it. How far above the electromu/x1 r;03 pgvewic 6qn is the proton?

  Two 0.20-g metal spheres are hung from a common point by z3hc.hg 0v- ihnonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart unti0h-z.3chv gihl 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 k4rq qdcy wt8/y:m 8.xthe magnitude of the electric field d8 c/xmqkwtq.ry :y48at a distance of 1.0 m from the nucleus?

  What are the magnitud cig8+z9ra; hde and direction of the electric field at a distance of 1.50 m from9i;8cah +gd rz a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magn53x4kg9 n, /de2cwqo fb bce-nitude of the electricfc4qn,w e92gk5d3 n/o e c-bbx field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the dirgf6ntiad/ b k5mkst .n*nr- v8r*f *6fection of the electric fieldt/ng*ir s8rf-nk* a vkfb5 t.fn*6m d6?

  A 5.0-C charge is 10 m from a smal 2fbliencqh: n,hwdq6 30 l4rqr n;1j+l test charge. What is the magnitude of the force finen nq3lr dh;1+c:w,420 r ljq6hqb experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0xy0 9hvw x.it;jz mv:)tzy7s/ C and are separated by a distance of 4.0 m. What is the electric field at a point midway betyz:i0yj/;t h 7z9w)xmvxv s. tween the two charges?

  A 5.0-mC charge is placed at the 0 cm mark o zrb.:rn,)j*qkl wzs0f 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 mark?q0rl,wz*: n.s) bkjzr

  A 5.0-mC charge is plac fv z zc 4 d(cdz1dwj)nb()k(swd03g1xed at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at )wcn1zxc4jf0v(dszd 13kb( gd ()zwd 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 and x = 0.20 m. Won71y*6x* 8 .,tpcdvjidvus jhat is the magnitude of the electric field at the point midway between thsvj7pu cndt* *o 6,jxydv18.iem?

  Three 3.0 mC charges are at the three corners of a s;j iyml+ y(8u 5g5it9lglcq *hc*3tgv quare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Fi3gcm8glht(*yl 9qvl5 * +ityi ju c5g;nd the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges *ztboo/slsye mef;94.w h kj 4b)fc,/ 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); t y);s*l j.f9 zwc,f4b/sh/k 4obeeom -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 ohuqcyx u65,: qr-9rg5 wht .u8p bf9isgi,f2sn a charge of 5.0 mC when it is placed in a uniform electrrb 9hgphfs5f-. 2tg5u qs x,uq9i6i,uwrc: y8ic field. What is the magnitude of this electric field?

  A particle with a charge of 4.8et nxj9)l/xg c;gb:pyqe) o; 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 r75r) mlh/w9o w,xpgsg u45mtg is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it t,t4w5g m)5l rho p7rsx9u/mgwo be suspended?

  A foam ball of mass 0.150 g c5ziu 15g vng*l /oe-ztarries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is oglg5 /v e1nz* -tzu5isuspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carriesohw0n 4i//ryk a charge of +2.0 mC. What is the magnituden hoyr/0/ 4kwi of 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 mC. What is the electj qxcx 1sld 0iix.vlp2 v+5td2mk 6i84ric fieldit 1i2c6j vxqv d.k0d8x 4mpll+2si x5 6.0 cm from the center of the sphere?