State the law of conservation of electric charge7:h,m8mkc5y (wdqcrcko yy) u:l:)z f.

  Is it possible for two negative charges to attract each othezaed2vy6+ l5p,d/o)waq wf+k b0 mm8xr?

  Is it possible for a positive and bm*a+ztacbv-dn3t)w1k h42eyw g t) y id()e-a negative charge to attract each other?

  A glass rod is rubbed wikksx7v gfvp96u 2d:h2th a piece of silk. During the process the glass rod acquires a positive charge and the sixu7:k6gf p22vv9s hkdlk

  A proton carries a

  The model of the atom shows a tpp hsz,+)n:u

  A neutral atom alway5fs +83v1h7zm) ynlpfn- bcmvs has

  An atom has more electronk(7h p7uqc,)xqgpr84qzf h ;i/ df0kks than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei arebo*dg:tq/ ol kd39x)hl2u )anc 0 4gkf referred to29g 4:h dkl t*xaf dlcq)/ob0n) 3kuog as

  Materials in which the electrons are bound very loosely to the nuclei anz;o6rl/ knt5k /fk7eo d can move about freely within the material k 5 6k7 f/kltzoen/ro;are referred to as

  A negatively charged rod is brought near one end of an uncharged me o0fd,b(9.xxzq y)jv1kz9 tuatal bar. The end of the metal bar fa k 0(d 1.xo)z9tqx9vfyjaubz ,rthest from the charged rod will be charged

  Sphere A carries a net positive charge, 4 a)k40xalnieand 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 is correct?k0en 4l4aa)i x

  How can a negatively charged rod charge anuxxyf abzq( i8 co(*-,3:ff vr electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chargedj wcjcz:5v2m 3 glass rod. The electros35j zwmvc: 2cjcope

  An originally neutral electroscope is nfsq(e -bslp7 19yqj2grounded briefly while a positively charged glass rod is held near it. -1plqy j s( q7ns29efbAfter the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. 4i 8t;zwjbp m)0l8rw-xvuj)c Then a negative object is brought ne0m 4)wix)8putj ;z8jwv b-rclar the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed sa9fij l;g6f6he+*fv u*mc 1l 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 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 egef9v*6 *m;1i lfjhfsa6+ul c ach ball?

  Charge is

  What are the units of mgosi19o80njhtq zgi 9 .6fd /the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distancev/((d lp*y q k.hel0em d. The first charge is larger in pve/0.*k em(hlyl d( qmagnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near7q 0j9qu*d3b8e fli8 vhz2hdxpgm+o0 each oth+ji87q *x2 o0p bh dve8udz0lfh3mg 9qer on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charg+ -4pcnj *tpn.ypp4, 0r pxbcc)to(dv es on both objects are doubled with no change ,jc+t. (occtdb 0p -nvx4ppy4*prpn )in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forces x9ev k 2 nw5-iw/qaxqb.l 7bh/of F on each other. If tebkhb9x q/-awn 5 l.w/iq2 vx7he charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a l(hwcdetbky83d trt+c.(4-9+/wcd uh8q j wcforce F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers iscc8((c.hd t+e/ + y buww c4 -jhdk8q3wdlt9tr reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are sepa3chlet.t /m4-l9p fnwqwld 2 2+cl 8hfrated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a seconc h/f2 lmtthcpq 3dll.wfe8w42-n 9 +ld electron is placed next to the first electron?

  An electron and a proton are separated by a distance of nf8 dy ow;trq5yh 4g+,1.0 m. What happens to the magnitude of the force on the fi 5+wyd4r o; ygh,8fqntrst electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1tlp- jh 0shf;5j r5mgvd2 f9e7.0 m. What happens to the si7hhe vd9s0lp f gr-;fjjt5m2 5ze of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second point np+8d o d9:sdqwm4 ri,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 squ4,8nqio dd+psmw: 9rd are'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 trg1 z89yl1jtbe l*39j yvtgv6q iangle. 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 chart3yj9v6v19 bqjztg18ell *gy ge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vyli fob:r :p5o)d4:x)yj egv1ector?

  At twice the distance from a point charge, the strp;13v)us 2zr /9:e )src k nfo(ankucdength of the electric field

  Is it possible to hav3kl36bsks ; xke a zero electric field value between a negative and positive charge along the line joining the two k kx3ls3b;s6k charges?

  Is it possible to have a zero electric field value betweeb ;e1*bxx*zt510)misalz p v wn two positive charges along the line joining the two charge)1;5wxztlsa* zipb 0mb*vxe1s?

  Electric field lines sln w - 1c7a5vyfh0;(bmqkp,q near psitive point charges

  The electric field se2 2 d mj ht:mahf-.lbsfj; zv2*ol.,ahown

  Can electric field lines intersect in free26m*lm 1-1gmjjyat8azq2jh f space?

  A solid block of metal in e g8 owkn ()j(8uk,oh wv.nvis+lectrostatic equilibrium is placed in a uniform electric field. Give a statement concerning (k nh8k8o(vn.g,w u+)j sviwothe electric field in the block's interior.

  If a solid metal sphe eitwcur **r8j7h e qtg+n..d8re and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfae8*t. cn+8ditwqur* h7 je.rg ce is

  A cubic block of alumi :n5u sdbmyn xdho/9,*num rests on a wooden table in a region where a uniform electric field is directed straight upward. Wha yu*x /s ,h5ob9dmdn:nt can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium neams8ms a, c(j/d 7wc4ulr an electric charge

  A positive point charge is enclosed in a hollow/d9 d ax(cym0cdxro412p7(q p 0dwjvg metallic sphere that is grounded. As compared to the case without the hollow sphere, the e 01 a2(x4dvdr g/yq9d owxmpcd7j c(0plectric field at a point directly above the hollow sphere has

State three properties of conducto)glk2xp. etlh5+u0c q1fyef. eno1+ors in static equilibrium.

State Gauss's law.

  The charge carried by one elecpcui f*mgs6/ )h (xu*ptron 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. 2-gtdhc-xtsl,ueqt3x u1j 1+f lg 26uHow many more protons than electrons does this piece of 6cqtl+1 xugd 3xt jut2sf2- hl1ug -,eplastic have?

  What is the charge on 1cyt zf i*9f(.8qk 9qn roomsw: -p+y/e kg of protons?

  An atomic nucleus has a lsd-tv/l.kkbs h5)h/jzs3u i:p;p.tcharge 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 valuufj4;tfpgew /; b.z.ao9u d,. 6ernbhes of 2.0 and -4.0 mC, respectively. What is the magnitude.d6a.o we,ju;u.rbtz bfh/94fp; gen of the electric force between them?

  A 1.0-C charge is 15 m fr,(i*2ygqjpko 1jjc+ vom a second charge, and the force between them is 1.0 N. What is the magnitude of the second chargeqc1y og v +(jj*k2ij,p?

  Two 1.0-C charges have a force between them ofs+jmk 2-dbudg r2ho ;7xnjl( nue h*8,s-6wig 1.0 N. How far apart are they?

  The force between a od803fnkz w e4$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0e/8hj0grb0ro cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the e0/jrhore0 gb 8lectric force between them?

  Three identical point charges of 2.0 m jh /g9bnj9km0xunbf*co*s4 )C 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 k ncb9oxjh f49nmj s/ugb) *0*direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on tf zu9(d1eaz f9he 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 direction of the electrostaf( u1adfze9z 9tic force which acts on the charge at the origin?

  Three point charges are2h xgx*dm0 y knxc+,b6 located at the 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. What is the mkmd60x h,*yc+ gbxxn 2agnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a squa 0e6z h),:vuaobne.0fdi + aopre, and a second point charge of -a 0inopue,d:z ha0fvb+oe6) .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)/g+.wvhpu ,l/e w5 bs9kdmp,g; Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Wv /bpg k u. wp/l5de,s+gh9m,what is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Qrbc; e6m 96vi5h ;nxqs2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0enrmq6; s;cx65vbh i 9, 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges vb,);,zwjbgd of 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which ac, dzvb; j)g,bwts on any one of the charges?

  Consider point charges o3tw/68 wu oa.;hyhqvi f +Q and +4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to plaq whva.yu t 3howi;68/ce a charge 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 is at x = 4.0 mbelih -/y r5l(aot5 v7. Where on the x-axis can a third charge be placed so the net forch5vaye/5i(7oll rb- te on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2gyrf6 qqh(z(oh (p1 :1bs ii.la. Where can a third positive chargg( 6(h:z. 1ql(rbih qif psyo1e +q be placed so that the force on it is zero?

  A copper penny has a maslr.s l53d xcv+pc1;zjf k+t +hf-6bzb csk+h7s 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 fo vuya(*.jqwv8x1 g wtyv;pg;dy z((b9rce of gravity by the attraction of a fixed proton some distance above it. How far above the electryw ((1 a y*wybg. v9v qu(8tv;pxjg;zdon is the proton?

  Two 0.20-g metal spheres are hung from a g j)+7 eiuar5qcommon point by nonconducting threads which are 30 cm long. Both are given ident 7a)e gr+ji5uqical 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. What is the mf4z/ w) 3 yn7 3y3cd8ps)zcyipvae.gnagnitude of the electric field at a distance of 1.0 m fr33zg /p)w in3ydc vz as7ypn8f4 c)e.yom the nucleus?

  What are the magnitude and direction of the electric field at a distayt;oz8i w6o0 tnce of 1.50 m froi toz0ow8yt6;m a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. Wo7u uqbb z3(,l3z e9gwhat is the magnitude of the ele3 z3g7o9 z(bq,eulbwuctric field at the location of the test charge?

  A 5.0-C charge is 10 m froot+ku+itmm )c/tf62e9 h2av zm a small test charge. What is the direction of the electric f cmok etfvu+9+mtht2 zia6/)2ield?

  A 5.0-C charge is 10 m from a small test charge. What isa (gl spf7gr4l+8yof gw8c,:z the magnitude of the fgl lorzw c,8g7 +:f4fy as8pg(orce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value *c3bzx j6m)apof 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a poin6 3b*xc jz)pmat midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0mj fp)xw *m4l: mC charge is pf:w4jx p lm)*mlaced at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed abnd;ssiu k(n 2)p n6u;aeq2 *pt the 0 cm mark of a meter stick and a -4.0 mC charge is placed2q2 (;n)iueuspkpba *n ;n sd6 at 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 xrm6uvphnhh 1.*pb1-b = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between thp-m6hrb * 1.vh1bpunh em?

  Three 3.0 mC charges are ati1d4z4 z ;n)jtlvdc;1,ny3kl xh rs2i the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electr1,i 14slnvzy d3;xzh4lt2d ck ir ;jn)ic field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at t)m4myb- w;ia-xe b xrkp-2j2r5jho i9he corners of the square as ywjj )ai2 29mph ikobm --5e- x4rxbr;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 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 h:efbn4 cyder mn.6u q*9j1h 2uniform electric field. What is the magnitude of this elect1 efqb em*. :y49uhjncn2rdh6ric field?

  A particle with a charge of 4.0 mC has a mass of j 0hz2k4*c6ywq)qx9*k1)uokfer js c zhp60o$5.0 \times 10^{-3} \; kg$. 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 ff3e,he6 e 4*4aiiic ( *(zyqpuqimk r)ield of 6000 N/C pointing downward. What charge must be placed on the buq3h 46e e*4iyq zk e*r)icpf,(aimi(all for it to be suspended?

  A foam ball of mass 0.150 g carries a charge o.b1.w- b q*kvaktg:x sf -2.00 nC. The ball is placed inside a uniform electric fiktgb.s:-x 1*wa. qbkv eld, 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 c8g ob3,5f* ymoe/p8r, ;xg(a hih aq oswcb-o*arries a charge of +2.0 mC. What is the magnitude of the electrihpa( xo,bro*/*c,w- i3hq8 bym;5ae gofos g 8c field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries ba71ir3qu*t +c e5vwta charge of 3.0 mC. What is the electric field 6.0 cm from i 5urq7wv*ba+ 3 e1cttthe center of the sphere?