State the law of con*n5e ob4y+ctx nt 41x(frcwk: servation of electric charge.

  Is it possible for twl)b2ujs2im t ac0o30 wo negative charges to attract each other?

  Is it possible for a positive and a negative charge to attract each othern u) abjmffvyz):- 24lwte);e?

  A glass rod is rubbed with a piece of silk. During the process the glanl; 5e(tex.-xu/cj ff ss rod acquires a positive charge and the j/ecef-ut x;f nl.(x5silk

  A proton carries a

  The model of the atom sho5b g:pans ds5dcrr /+5ws a

  A neutral atom alwaysj5eo3qr8jzdc9 ghnp + gw,)v1ar.v,k has

  An atom has more electrons than protons. The n d wp:o1i;d9satom is

  Materials in which the electrons are bound s/2r4 utqv/1h l;liez very tightly to the nuclei are referred to assqzvhri/ul e2l;1/ t 4

  Materials in which the7.av5)z c tsug electrons are bound very loosely to the nuclei and can move about freely within the material are referred s5au. )gvz t7cto as

  A negatively charged rod is brought ;86fqi w0;flkud*v +mbr g*q5gu/fb m near one end of an uncharged metal bar. The end of the metal bar farthest from the +vb i*f gu;qmf;dlqrfw58 kgb/06m* u charged rod will be charged

  Sphere A carries a net positive charge, a/2cukm21ab mk9fu -vlo/zr+ and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire tfk umob2v+2a9 a1ru/ cl-zm /khat is grounded. Which statement is correct?

  How can a negativelytb.k:bkpxzmc j*0 k 03 charged rod charge an electroscope positively?

  An originally neutral electroscope is2 wkja)2rs:+a y w-kfw briefly touched with a positively charged glass rod. The electrosww-ys:j wkk2 2f+ raa)cope

  An originally neutral electroscope is grounded briefly br*gcx5d */qzq * .t z(gb,jrdwhile a positively chargeddz**/ zrbr jggc.,tdqqbx (* 5 glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscop.h(zdw;1supz e, and the leaves separate. Then a negative object is brought near the electroup( z1dwz;h. sscope, but does not touch it. What happens to the leaves?

  A large negatively char2dgb3* a) ujyiged object is placed 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 thej 2uia3by)d* g 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 Coulom9ce+0mh)ehqe)6 mxcu b constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Txze-)aaz )i 7ronsq) 0he first charge is larger in magni)0saq)nezo airx7-z) tude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near eac/e7vcyf5u c*ud/et de)6 lp1ch other on an insulated table. Which statement best describes the electrostatic for5e/ev7e )lcdupc61y/u tdf*cce between them?

  Two charged objects attract each other with a 3d9xe zk,u3ph bi nc;)certain force. If the charges on both objects are doubled with no change nzbu;) pd ehk3x,c39iin separation, the force between them

  Two charges are separated by a distance d and exert mutual atks(nc ;t62xc*lilx9*1v3esj qqbv c3 tractive forces of F on each other. If the charges are separate1 q( *xvinllxvcsescc ;36 2bt3k* jq9d by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the fo qbhdjhl9,bhwd4v7 2s1b5ao / rce 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 forlb hd 9hbwaoqv/2s 574jbd1h ,ce is now equal to

  An electron and a proton are separated by a distane7lacx* / pg1) ht5fztce of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the firstl x*)71gft za5epc/ht electron?

  An electron and a proton are separated by a distancwp i ;dza7o8 ix.; e*rodb oae:yt7un9wq.13l e of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed ne8rw eod.97*q1:xb ;a a .;zn lo oydu3piitw7ext to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What j) x-g7jxs/8wgo3qt rhappens to the size of the force on the proton if the electr -7rxogjwt sq3/) xg8jon is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squasfvq2t6b,0mo9**81bkbctkska d ;hfre. 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 square. What is the magnitude of the net electrostatic force acting on the pos*dvtkas;1 obqhkm0c9,t* f8f2s kb6bitive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equila+nj cgg l84hq-- fj (jntye6i2teral 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 thej2 ly8tn-j-(h6+ i f g4cjgqen 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 nothohi 5oft)-( h a vector?

  At twice the distance from a point chrr0xdpr .5fu+ arge, the strength of the electric field

  Is it possible to have a)2hml1q g mm9u7 jvu8 fayje ke01:8lk zero electric field value between a negative and positive charge along02kym jlkujfmegu 81:l8q) 1 m9ahv7e the line joining the two charges?

  Is it possible to have a zero elefg+r/v go lfb-h) ;dvof )f6k4ctric field value between two positive charges along 4ook f6hfffg)/l- )vb+; r dgvthe line joining the two charges?

  Electric field lines near psitive pointfkbu /a6cfz ft19 mo1;4rx1 kd charges

  The electric field sdzln u uvb; )9x*zsq);hown

  Can electric field lines intersect in fj dvru3e) 2r-oree space?

  A solid block of metal in electrostatic equilibrium w:+sw6 ,5wihohuvdiab +i * y-is placed in a uniform electric field. Give a sta+u +v i,w:-w5s6wh bi*ydhoiatement concerning the electric field in the block's interior.

  If a solid metal sphere and ahhvt2l5e-al*- a 3qh)z6cyxu hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway bh6y ahl3tzceh5-*)v a uql2-xetween the center and the surface is

  A cubic block of aluminum rests on a woo b:gb 1hwa/f:zden table in a region where a uniform electric field is directed straiha/f :w b:1gzbght upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostnhniop 0ls+6; 8*v:/w fwltb iatic equilibrium near an electric charge

  A positive point charge is enclosed in a holl15d m8n8sol qnow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point direom8qd5 81nslnctly above the hollow sphere has

State three properties of conductors :9 ,plrss*u h(1hf0rs. wzlixin static equilibrium.

State Gauss's law.

  The charge carried by one elo/iutn.ta f b/h-w;n h+ey30jm 8s ny5ectron 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 protons thans,i *;e* d+5eyfnra 5*e fm,qaaso+.docdno2 electrons does drsf,s*.ae m*e+, o 5afeqcyn*a5 o d+n i;od2this piece of plastic have?

  What is the charge on 1 kg of pro*z/r )ykoc prv .mw9l-tons?

  An atomic nucleus has a ch-dev7tx 7(+f* nh qawharge 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, hamz/ g zffe9l+,ve charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force bemz,fz 9/+efgltween them?

  A 1.0-C charge is 15 m from a second charge, and the force blm0uv 37a5s -:7yet0lw bnkiy etween them is 1.0 N. What is the magnit0vsyb:-un y0 7talw5l km3e i7ude of the second charge?

  Two 1.0-C charges ha/3xpg 68p;7iu- jxd;fosp-n )u qpqka0f1qcjve a force between them of 1.0 N. How far apart are they?

  The force between a 9dby2/v :fqijn, 4 htp$30 \; mC$ 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 force. If they ar 1)y9j *vnwtuhe moved to a new separation of 8.0 cmh1vywtn*u9)j , what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on/ loc5q8c7qpl 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 which acts on8 oc57q clq/lp the charge at the origin?

  Three point charges are placed on7owh:n2 ngp(m 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 theg n2(whom7 pn: magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the followu3cp+1x+jleu-ck+u.esaau, p2 q a i 7ing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = 1+uuxj u. sei -eup k7p3+c,+lcaqa2a-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 poiga. :h1v(yfk nnt 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 a(v ynf :g1hk.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); Qex;) t0yuttp 93 = 5.0 nC is at (0, 0). What iett9) pyu 0x;ts the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1t; j / pi5)z6j gktad-xi*8rfn.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whatpf5 taj-gjt) n86dz*xiri/k ; is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertickx cm2trii:df pabo 6:g 030d3es of an equilateral triangle which measures 30 cm on a side. What is the makdx 2d63 0fcogr:mit0i3pb: agnitude 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. At what vs iorpr18j7vbxx;+n (lorxj7 s5 f-1 point, on a line between the two charges, wouornisj1r51j7rv+-(7sx;vb po8 l xfxld it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origi)k xi 2.gg)x+;m .g* pdt+ bwg:vyvrtdn and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the n .:pvbd;gk)rx i2gxt )vgd.mt+ +wgy*et force on it is zero?

  Charge +2q is placed at the origin and char2/ hvxf7r s c;5cgjb3da, roq;ge -q is placed at x = 2a. Where can a third positive charge,;dbcghsqr7;2c axr fo5j v3/ +q be placed so that the force on it is zero?

  A copper penny has aiwgpywcs h 0jvx05d 427dla) , mass 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 id ffn7f-65vn force of gravity by the attraction of a fixed proton some distance above it. fdf 5vn6 -n7fi How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a commog-8 ultz79m2s3,xijd n ak7 na2npnm2n point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatn giza-9n,ma2 lt 2sd87mp n72xn3jkuic 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. c n.mrd 7ocj+ i3sr-z/ What is the magnitude of the electric fiel. /cj37scr+- zoimdn rd at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction i 98xe,v kla165uz9fzscbs.9j lp + ylof the electric field at a distance of 1.50 m from 96,vx+9 bp18llz.zfa 9sjes5ul ikyc a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test / kjmk ,f0s f1qblqg96ys7si.evs( g5 charge. What is the magnitude of the electric field at the location67b sg(v9/i js0,mq.gssf y kk15flqe of the test charge?

  A 5.0-C charge is 10 m from a sm -x7pn 5d(:em-w;tl4a mze9ydx,lr woall test charge. What is the direction of the elecne-xd4 o;ay,medm l5 rx-tl w(z p9:7wtric field?

  A 5.0-C charge is 10 m from a small test charge. Wh)eui a5v u6lg.hib:c5at is the magnitude of the force experienced by a 1.0 nC charge placed at the locationv:gi6aecu h bl5.)iu5 of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance oflqn3 *meeoa5 7 4.0 m. What is the electric field at a point mideaon3m eql57*way between the two charges?

  A 5.0-mC charge is placed at the 0 cm m+u exj2 0 2,vzlub ::c9uagzd cfkn.c:ark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at gk2ej fn0adlc::ucz+,c x u.9ubz:2v the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark o3-fgv73xi+ 5frs tz8t *dt)u8pbhgglf 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 the electric field lgftd3gt878x )i*p3thsb gr5 fu- +z vzero?

  Two point charges of +3.0 mC and -7.0 mz :/t 2t:zub-bupm1ur C are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field u/:bpm z1-tb tuuz 2r:at the point midway between them?

  Three 3.0 mC charges are at the three corners of a s7z8yqr.f n 2cbh)nj;o quare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of th) fy;.8j cqnobn7z2rhe square.

  Consider a square which is 1.0 m oyr1g;w . pm2qjn a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4 j1gqryp2w .;m.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 mkdlq t5xwm07 .C when it is placed in a uniform electric fieldx5l 0m.qkd7tw. What is the magnitude of this electric field?

  A particle with a chargefdtzua6y )-4 piokb12 of 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 0gsewq*uph . iuw9()d3.120 g is placed in an electric field of 6000 N/C pointing (u.dewp* uiw h)g39sq downward. 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 -2.0j(o aaiby-q ,)0 nC. The ball is placed inside a uniform electric field, and is suspended against the fo-a)b(y,ioqj a rce of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of *ldt( im(9e p -ulu eoo83jhw/+2.0 mC. What is the magnitude of the electric field 5.0 cm from the sph* -m eut 8hoe(jilw(d9/u l3poere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What ixe7rog+0mv m p+w0 cf/s the electric field 6.0 cm from the center of the sphe/crmo ew pv mg+x70+f0re?