State the law of conservation o yxc;sdfw bxh5;g+7 9rf electric charge.

  Is it possible for two negative charges to attract each other?af2ku4v h6qded6n01r7ni b 9f

  Is it possible for a positive and a negative charge to attract each other?v nq9a ,fdf-j vi,3br0

  A glass rod is rubbed with a orvti32q 66 yip prfgsmi1 :c ft,:)/wpiece of silk. During the process the glass rod acquires a positive charge and ther6ittp i::o,1s2q cf3 v/6fr)gwimpy silk

  A proton carries a

  The model of the atom tllt3v p +cid2u; ,2z ;iq+maqshows a

  A neutral atom always hasnhv / mrf9w h( 8rich/ m97yrik/r)6ek

  An atom has more electrons than protons(9 . grijrn9-lvx6u fl. The atom is

  Materials in which the electrons are bound veroj q,08uqy x2zy tightly to the nuclei are referredq2ox0qj8, zuy to as

  Materials in which the electrons are bound very loqv yxjc(34s r0osely to the nuclei and can move about freely within the material are referred to cjx34s(0yvrq as

  A negatively charged rod is broug0b5 l+re wvww4ht near one end of an uncharged metal bar. The end of t 04+rwl5ewb vwhe metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge ce:twjkv x jzmu m-0;3n4c:y,, 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 grounded. Which statement i0c z;3-vjexmyw:m4,ck tu:jn s correct?

  How can a negatively qlw 0upbjgvwi( 5; 4r+charged rod charge an electroscope positively?

  An originally neutral elect ;6kmw,wl:+wnq(t .f y )pfckeroscope is briefly touched with a positively charged glass rod. The electroscnme(yw: c,l+f fk ;wpk.tw6q)ope

  An originally neutral electroscope is grounded briefly while a positivelyx8 ytpx/ b zq7bi i7jtb9;;1rj/0za,p ojpm4k charged glass rod is held near /9 jjb,i7/p4x8xry t0k7 b;za;1oippjbqmtzit. After the glass rod is removed, the electroscope

  A positive object tou .:a13sgxs yynches a neutral electroscope, and the leaves separate. Then a negative object s sa: nyxg31.yis brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on t +mh6l/ g(c: wf;wpuhzr8u; tan insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neuw; hrt pcfz+tm:(ghu8 /wul;6tral 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 Cou d;c coo z4ake)lu* )pz5i+pz7lomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distancste i /scqqa;*0 9aolro*xwr)k dch(+*uy0 2n e d. The first charge is larger in magnitude than theo+te )*ql 2/a*h0ssyc rqoa u x9r(iw*n;dc 0k second charge.

  Sphere A carries a net charge and sphery 8:mdyn4a*5adg sa z2e B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force between them?*ndya4s8 y :mg5d z2aa

  Two charged objects attract each othn3wosqh6 /ssvtz8u ()gh q6 :ker with a certain force. If the charges on both objects are doubled with no change in separation, t6hqkn )6h/:s s8wt gvzu3s q(ohe force between them

  Two charges are separated by a distance d and exert mutua;u 6r yb48i xt6ahc:srl attractive forces of F on each other. If the chati 8x4h:r s cay;6ub6rrges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happensly:: k c7a v2l.z+ofdt to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduc7alk :fcy:t.d 2o+vzl ed to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distanb sl; lbo2l9t())5 orynqowp lfs+; p:ce of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first electro:l po;rl+ y(q t5pws29ob;o l)nf l)sbn?

  An electron and a proton are separated by a disz xzs( bkf.xc-p6 y79ytance of 1.0 m. What happens to yz79zf(bc.xyps -x6k the 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 2tm- wid.c+exr 71t iwby a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to the prem 7.ir ixw1wt-2+ tcdoton?

  A point charge of +Q is placed at the cen7qvfpfti7 k:-ter 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 pf:77v iq tkf-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 cenvadlyb2 l, sdh5:p3x(/ znl3b g.u qk,troid 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 act5uxpln 3glhb.z b :,d,2 ayq3/lsdvk(s 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 c0-p2be)cyvbx2z yh- vector?

  At twice the distance from a point charge, the strength of the elc3z-dztjxz q4z:e+sx3,+rgl ectric field

  Is it possible to havekemsjwx6 h ix5-7g hcq*)m.ocr.)8l g a zero electric field value between a negative and positive charge along the line*.5hx -) ckhg6.wrselji x)mg 8c qmo7 joining the two charges?

  Is it possible to have a zero fr2:.:zb:d:vw ozrjgelectric field value between two positive charges along the line joining the tw::: r gbv2zdrwo.jf :zo charges?

  Electric field lines near pt;oasw dqde+f)h w jih .c5mrx4k9):.sitive point charges

  The electric field shown s(k f5b5k6 i.ceqcgn5hxlh us48):yl

  Can electric field lines intersect in free s/s mr8djrud.p-u;zz 6pace?

  A solid block of metal in h*;hs nse+cr5 )k*hdn electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the *nkc;rs s5h) *dh hne+electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equnmpb jn0d.j5u4 wxhu-3qm o9)o7*roz al diameters are each given the same charge, the electric field (E) mi7obun zjmnph. 40wduo-3 mo*95q rx j)dway between the center and the surface is

  A cubic block of alum6i q8cq, auzl(inum rests on a wooden table in a region where a uniform electric field is directedil c(qq,zu a68 straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an ele43bf p83yxe xy0m)dv 8zt w:onctric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groun(kx23d up5ijt ded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere (kpdxiu5 t32jhas

State three properties of ))zpe;r(w d(rvla sn :conductors in static equilibrium.

State Gauss's law.

  The charge carried by +dh.(p/+g j; rfzvmwdp:aj 8mone 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 charge of +2.00 mC. How many more proz59g k- ac-4cs4qsvg otons than electrons does this piece of plastica4k4qscv5g- -o sg cz9 have?

  What is the charge on yg nuhv7 h-: kei9;i3uck 0dw41 kg of protons?

  An atomic nucleus has a char f(q(b3tpw 8w5px;a1 sm,b lqq7wvh8nge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.c -b:a skl pkp5s7fi5;5 cm, have charge values of 2.0 and -4.0 mC, respectivel5k k c;7-slpspb5:aify. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between 4 cxs4.u1s9ixhps86 dipn - fmthem is 1.0 N. Wh p4n cs sd64imx-8is9hupxf1. at is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 4umm8qqo n:x* 1.0 N. How far apart are they?

  The force between a 4w8ak yi8d;fzfs; ,us$30 \; mC$ 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 .rphu m1+;qdj force. If they are moved to a new separation of 8.0 cm, what is the electric forcrmj;p q. h1du+e between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. T 6wrzv0 wh:nam-*7s lp8tjz,jhe first charge is at the origin, the second to the right at x = 50 cm,j ,ar-6*:8 h0psvzwmwztl n 7j 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 the origin?

  Three point charges are placed on the x-whvl .ctt:z.n0)*h1*jg)xea7wl cv q 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 arew vhgh07a1c. txnw):.cq *) l zvtlj*e the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following pnsg/8bcm(ej+00l ytw ositions: 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 chargwgjs y0ec(8bl /0nmt+ e?

  A point charge of +Q is placed at the center of a square, andp ;xretzn,3e2tr5*)iced 4u y2k* dcz a second point charzdnyu) *3r4e5z i*,dk tct2rpx2;ee cge 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 5se6yj9)tk.c**tysplx u +d4e 9 eifyat (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magn*+ pjk4c* 5fyysx 9ti.te6des le u)y9itude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC 3 asai0 z3k t:zsnhh8z3 vx02his at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wn z2xh 3z0tz3ss:hki 08 hv3aahat is the direction of the net force on the 5.0 nC charge?

  Three identical chargvzgiqmps(;gf 6*s, y*es of 3.0 mC are placed at the vertices of an equilateral tsmvs g;fy,6** p(gizq riangle 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.udb 7ho1yl5 8ne- lh4y0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the e1 bl4u 5hl-do7yeh8 nylectrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a i4o (8kbhfobmo83/kwr tz 1963ivuxo+9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net forcefbw m1vo8(4u 6o938rktooxk3ib ih /z on it is zero?

  Charge +2q is placed at the origin and : ,0snqcnaei,charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on ,,na:cie qsn0it is zero?

  A copper penny has a mass ox ,12qqjfpd/(3mj ccmf 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 g08t.z k/wxa fkravity by the attraction of a fixed proton some distance above kw z8 txka.f/0it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a commovyg -c4s-5lk puoi5 i2n point by nonconducting threads which are 30 cm long. Both are puy2-vgi-i55 o klcs 4given 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 of +40e. Whatp wu tl/svc*7- is the magnitude of the electric field at a disul-w p*/v tcs7tance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance * tlx0: 3l;gs d.asp wfwq*v)wof 1.50 m from a 50.0-nC chargepd . sw0xlw;w)**av:sgl3 qtf?

  A 5.0-C charge is 10 m from a small test charge. What is the mag1ww1wk.fariw kb,9te-*ea :qnitude of the electric field at the location of the er:9aw- ,w.1k kbww iaqtfe1* test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction oq q 7nqt8p/+vcf the electric fq7 qn cqv/+tp8ield?

  A 5.0-C charge is 10 m fromf) ;d:h4/vlhs hb u)yl a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test chargeh: hv/lbd4 )yfhu);l s?

  Two point charges eax1+4tl arplg2 g9mq;,q.dtf bch 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 two g;lb +txdt. mlpq r, 4g92qf1acharges?

  A 5.0-mC charge is placed at the 0 cm mark ofr+-,kh 9aq/ hnq *c(3vmkpnj t a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the rcn(vmh-a kp *tj+qnkq,39h /electric field at the 30 cm mark?

  A 5.0-mC charge is placed at thbyp/ zut o,k*b2:ha2ibs/fe , e 0 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 b iafu zhb ysb22op:/t,e k/,*the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placem:qg;rmqp4 rzwx.i;988hlvw,* hthy d at x = 0 and x = 0.20 m. What is the magnitude of tmqm8g*w hvqri4,ly;ph 9r: t8x .h;z whe electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of abi30tgc c,,as square of side 0.50 m. The last corner is occupied by a -3.0 mC charg gt0,csc3 ,biae. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the corners o34iagw,mbrus0t,xg 9ipjhn; rr .q ,. f the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, girw39, ,.bit uxh;p 4 g,rqrj nmas.00); -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 uniform xd.,)v - v-zwmdna us1r 4i-lkelectric field. What is the mag lusdi - am)dx wzv1-n.vr4k-,nitude of this electric field?

  A particle with a charge of 4.0 mC has a -sho,tqtnnn15bp+ e. 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 mvx; w n(xebbq/:t3 rz42yxm/x71fbzg is placed in an electric field of 6000 N/C pointing do( 2qf z43/e7rt: n/zxxwbxbb1;xm m vywnward. What charge must 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. The ball is plv aiqjdv,yreq2we0 npd2i3npf 3 / oz4 b4;1h(aced inside a uniform electric field, and is suz34/ y4fwen2p0, r q3;d eihbnjvi o1 v(2qapdspended 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 +2.0 mC. h).pgzghsyg(:6z0 q m,b u3 xeWhat is the magnitude of the electric field 5.0 cm from the sphere's sz6 x(h ggb), .s3g:uy e0qmzphurface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. 0bb9i 8 htmmf7 What is the electric field 6.0 cm from the ce7 f80hibb tmm9nter of the sphere?