State the law of conservation of electric charg4ioxpu(u mo6-yh6/dt1ai rnk8.ak;ce.

  Is it possible for two negative charges to attract d ++m*q,sojphemt,l .each other?

  Is it possible for a 6ydmal( wfay 7w 9xi;.positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the gla pcobr; 3;ia+jjbkh. 4ti 1gn9ss rod acquko cig+b9r1;hpji. nja ;b3t4ires a positive charge and the silk

  A proton carries a

  The model of the atom shows arnnvm26w j0tupg0 u /8yr9wy3kk pv-.

  A neutral atom always ha+jlk oci5lt 9.wc+ ae0/ eed8fs

  An atom has more electrons than protons. Theu6 d rzi;w39wofqm9o( atom is

  Materials in which the electrons are bound very tightly to the nuclei are r+re+ 6xz *if ogxs69pqeferred to a+o efix9sg* 6qz6xpr +s

  Materials in which the electrons are bound very loosely to the nuclei andcxcei/ 96k9fs can move about freely within the material are referre 9c96ics/xfk ed to as

  A negatively charged rod is brought near one end of an uncharged metal ft*w 1hqk-it; bar. The end of the metal bar far i ;tw1k*hf-tqthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere Bxmdbvy+(v/zrlmf-.l0vwo; 7sp v)x 3 is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is )py d;(rzfvl /vwm+xvo-v0m. bxl37s correct?

  How can a negatively charged rod charge an zd :q9g) *wk:b0gsxhe electroscope positively?

  An originally neutral electroscope is bhskb uhw/ .f+,riefly touched with a positively charged glass rod. /wf,hsbu .kh+ The electroscope

  An originally neutral electroscope is grounded briefly while a positive2k-hy )l*mrskdwb0 i29 f epv.ly charged glass rod is held near it. After the glass rod is removed, 9f. h*0 2y- m2iv wsdlkkrpb)ethe electroscope

  A positive object touches a neutral electroscope,9zp 1ilsaaew5s;r m8 o 8:jf8nk4b0m q and the leaves separate. Then a negative object is brought near the electroscope, but does not touc8msw r;:1 ei9j08ls 8pmzabnk 4a q5ofh it. What happens to the leaves?

  A large negatively charged object is placed on an ied6r7w ha jbn),a +*cqnsulated 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 ei nq*he7,rwb a6jac)d +ther ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Cot+qhgq 6 *l rr:g*ftaj). lnv/ulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated b)c4:h.h lz st2qrj5zwy a distance d. The first charge is larger in magnitude than the second :wz4lq)c ts h5 r.zjh2charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed4yq bpy,sq78t6ghqx1 near each other on an insulated table. Which statement best describes the electrostatic force betweenty gp4qy q1hb68sqx 7, them?

  Two charged objects attract each other with a certain force. In/dvi pmd if((it /3a)f the charges on both objects are doubled with no change in separ(ivmai)/d i(3tpn /dfation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces of8ix-j2m+j 9 (-yiwfngpoa w.b F on each other. If the charges fwb.j xai 9o-p+8(i y-2wngmjare separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. Wht ( a -3kh.ydoj8zxpe3at happens to the force betweedkxy-jat.p eh z83 3o(n 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 now equal to

  An electron and a proton are separatc -v411f6lk ,t0/pzaqcv joajed by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed0kapc4cl1-af1/z,qjt v6 jv o next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. Wh6pti8x t/ai *eat happens to the magnitude of the force on the first electron if a second electron is placed next to the proton6xpi8ti ta e*/?

  An electron and a proton are separated by a distance of 1.0 m. What happ oe.xk9pc1 x 91t3jritens to the size of the force on the proton if the electron is moved 0.50 m closer to theo9 jtrxc.tp3x1i 9k1 e proton?

  A point charge of +Q is placed at the center of x8hhdj(k/c.qyil2ta 2h z3 5ea square. When a second point charge of -Q is placed at i.xch 52/kzte28q3dh( yljha 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 the positive charge at the center of the square?

  A point charge of +Q is placed at theji/pu vkt vd)88 wq*yz+of 5f1 centroid 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)8+5 8ipdf 1yvf v /kwt*zqjuo 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 a ve( d0fw )aw0yay1a (dh zulb/1ector?

  At twice the distance from a point charge, the strength of the elevsqvam v5g;pslmm /fay84-*0ctric field

  Is it possible to hav 93n1 gcfp/knzx : jpe7w;ncq,e a zero electric field value between a negative and positive charge along the line joi : zngj7cnpx;3k/qp9 e1nwcf,ning the two charges?

  Is it possible to have a zero electric field value between two poso3 ;dk cy)9huwitive charges along the line joining the )k3cydo ;w h9utwo charges?

  Electric field lines near psitive point chargs-x2eduf3 / 2vkdqyq )es

  The electric field szxbr5yz umc8/p-3q 2m hown

  Can electric field lines intersecttx )n8+rj3 /gbdwnmnq152yxw in free space?

  A solid block of metal in g h2 (k qb7zu*pdko0x0electrostatic equilibrium is placed in a uniform electric field.o kdk gu(0q hb0x7p2*z Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a bo lq4dwv2 ,4khx( qsp5u9 3vyhollow metal sphere of equal diameters are each given the same charge, the electric field (E) ml q 9s b3upv khvd(4o2,4wx5qyidway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in5, l2pgd)uw yb a region where a uniform electric field is directed straight upward. What can be said concerning g25udb)yw p ,lthe charge on the block's top surface?

  If a conductor is in elesn0/ekdw9q3-l2c y6 vcb 6 jbectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a holghfen6 5+ v+c4pvp*v glow metallic sphere that is grounded. As cp+*h c5v+6pg n4vfge vompared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three propertif5h rd6e dmj0*1 (ef8 :ztjdlies of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one elecmz)xn04bgx29:3nopz wx rrc 8tron 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 charc+tv1 lzr-ai +ge of +2.00 mC. How many more protons than electrons does this piece of plasticv1-i+ l+tca zr have?

  What is the charge on 1 kg of prot ;xujyx5 gh5o2 x2i2 nv7c/vgaons?

  An atomic nucleus has a charge o uqfs*29y 4 h:suqw:lsf $+40e$. 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 2.0rt s8 nc/8/fvs and -4.0 mC, respectively. What is the magnitude of t/vfn8/8r ctss he electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between dv* ejfclw;;9l8 kn 9wthem is 1.0 N. What is thfd98;9kjwe l*; lncv we magnitude of the second charge?

  Two 1.0-C charges have a force le nia6g2.)fk between them of 1.0 N. How far apart are they?

  The force between a 08m t5*shgkmbeu )60fjc h; +/hhc fcp$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initialxq xna1*d1e 5aly 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric*d5q a1aenx1x force between them?

  Three identical point chargx2ta:k ,uv:d(*c fojs 2k,qh0cj)y cl es 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 ma)(ftx0cuc,l kcyd2s:hj: j2a *k v,q ork. 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-g u-d9ywnc57, mhhxwje* /9smqzv 5m6axis. 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 direction of the electrostatic force which acts on the charge at the ori -96 dc9jz* m/n5qyugse7mwhhw5m v,xgin?

  Three point charges are located at the following posi .rcuru 1+t4yb (p(+go(yzjfvtions: 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 force on the 3.00-mC charputuz (+c+1rybjo(.y frg(v 4ge?

  A point charge of +Q is placed at the center of a square, and a second ps/q 2i / n5op2i e0orn)kfizt1oint chaoikn/22rfi1 etpq/o 0nsz )i5rge 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 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 ag+ y3uq-yh4 ixo) ,tput (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is tho+i uupth g4)yqyx-, 3e magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (067y1wb .8zyyje wrwq;bdn;9 cjaq1r82md i0 d.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0az8rqn6bjbwmjw i2ydr. ed7c91yq8;1;yd 0 w). What 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 +i obhgq64 5dfequilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the cha6h+qg45 fiodb rges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what poih el(,bm m- srkyg)52w3/ aicfnt, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force bml3mh2(wfgier a5k),y /-csacting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge i h2ce1v,9 xvepay4*id gdiqh,2/v/ xns at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zeve,i* c h4/x hnvedv/2q9x,12 dyaigpro?

  Charge +2q is placed at(6sr4 ;mght buw4 xgy6 the origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so twgu;466t yhxm(4grsb hat the force on it is zero?

  A copper penny has a mm.fzdd2hv)5kh (k r9u/s9hq p ass of 3.0 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 a0 .c7v + ;ng.-+ztkft nxrzylx fixed proton some distance abovftt + zk0x7 vr;nz-c+..xyglne it. How far above the electron is the proton?

  Two 0.20-g metal spheres a mmoncjk cgc2-:+h0f4w)t1kx re hung from a common point by nonconducting threads which are 3g24 fo:jwm c xmht1k nc0)k-c+0 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 ofk3z emelkucj2p7n-/(+vo8hy - c0r hy +40e. What is the magnitude of the electric field at a distance of 1.0 k + yc-ey l820e7z jc/ophr-v hmu3n(km from the nucleus?

  What are the magnitude and direction-4 ikfrsz-+bu of the electric field at a distance of 1.50 m from a 5--+f bkirz4su 0.0-nC charge?

  A 5.0-C charge is 10 m from a smo tbhl:l26yt) k+a7jv all test charge. What is the magnitude of the elect7tk lj2y6lb) vh+to:aric field at the location of the test charge?

  A 5.0-C charge is 10 m from a smp3zd+p1,hxo4n 3 sql86oxleh3t vz, fall test charge. What is the direction of the electric lxp dh631f,33 o4nltqz oez+ 8x,hs pvfield?

  A 5.0-C charge is 10 m from a small test charge. Whate 1 wqk);;e1,y fkd)-k(jjfnu5f rfxc is the magnitude of the force experienced by a 1.0 nC charge placed at the locatiokf 5-(wkkn efurj1cdfe)1j yx );f,;qn of the test charge?

  Two point charges each have a value of 3.0 C and are separa+vu4) 0 qz7ecw0a npvqrpd+q2x/sh-::onbyn ted by a distance of 4.0 m. What is the electric field at a point midway between theqp ns vwe+ nb:/070ox+24zyn :ah)-r uqdpvqc two charges?

  A 5.0-mC charge is plapchrjp0i 6.fwzj0( k2 ced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm0 (0 fj.zkw j6rhppi2c 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 -4.0 mC cha/d2t.xhjrbx;7w/mm ihm: f9 vrge is placed at the 50 cm mark. At what point on a line jmbthrmih9jfx;2 .d:/7m/ v xwoining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC:-)v :jeqpr6n1 uq dgt are placed at x = 0 and x = 0.20 m. What is the magnitude of the eletj:6 pn 1r)q-q ud:evgctric field at the point midway between them?

  Three 3.0 mC charges are at the th0cs1j7 gr)u5q hv1ble ree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Finq0jh) c51 lrv 7bse1ugd the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at theql9csny okp la3+);f: corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mCa;oqf +3nl)cl : s9ypk 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 ki.87czl h; (vnl yey us*51bjit is placed in a uniform electric field. What is the m7yu jzck (bl*iy;. hl58se1vnagnitude of this electric field?

  A particle with a charge of 4.0 mC hafz385 ebat 0u8m :kgjh *jzm6as 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 /o. v3s2qm hp 7ynhl3dg is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspenddql 3/n7o .hpshm 2v3yed?

  A foam ball of mass 0.150 g carries a charge of -2.00 l6kiin.qhn nexv 7:;6;x:ws00w vn e dnC. The ball is placed inside a unvqn iv. 0; x:wi;706:ed 6n xhknwnelsiform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.e+;r* iefpprx0)l0u i 0 mC. What is the magnitude of thi+ *)i0p0 p;rexulfree electric field 5.0 cm from the sphere's surface?

  A metal sphere of raddz2ltgqt,yh2y(q a cc/ ir*4:ius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of yg rctd cati,*qzqh :l2/ (42ythe sphere?