State the law of conservation of electc(go5qoh/ zqyn rx -4/ric charge.

  Is it possible for two negative c-; (b.alr ilm.kh gp7iharges to attract each other?

  Is it possible for a positive and a negative charge to attract eacb j/6t6f:uc rsh other?

  A glass rod is rubbed witfksw 4q)efn,/g- ad1 bh a piece of silk. During the process the glass rod acquires a positive ) n,asfkqbwef dg-14/charge and the silk

  A proton carries a

  The model of the atom shows24ah1 aovw7 wtb(n.o i a

  A neutral atom always ha /v9z+g9f2 5zrwkxe prs

  An atom has more electrons than protons. aa ro14nw)g23npx3 uh The atom is

  Materials in which the el9njc;s(c*9kx j1 xise ectrons are bound very tightly to the nuclei are referrcs( j9jex;nc ki19 *xsed to as

  Materials in which the electrons are bound 7t+at /jyxh.cvery loosely to the nuclei and can move about freely within the materi/ .+xcyjtt7 ahal are referred to as

  A negatively charged rod is brought near one end of an uncikj8xtjq*b(c,)) f 8dzkd :s vharged metal bar. The end of the metal bar farthest frod,tkvisxcqj b z8 jf:d*k)8()m the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are pb85uwzeaz7 (7pcy8 julaced near each other on an insulated table. Sphere B izw5 u8ubac7pey 78( jzs briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged 0 7fouioqli92q r)f1rrod charge an electroscope positively?

  An originally neutral electroscope is bri e6z4m8fr 0nwyxiowei )9,+zcefly touched with a positively charged glass rod. The e8z nw w,4cxy eizr9 )6mfo+0eilectroscope

  An originally neutraw (e9jk gw:al5 3)lof6jvpf4 ql electroscope is grounded briefly while a positively charged glass rod i(j43k: p6l9wg5ofvw qjlaf)e s held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral5 vp13txt) ;erb5c5u xi ywajh o*,l*f electroscope, and the leaves separate. Then a negative object is brought near the elect5ajxox*531 tw*pf), e yutlb v;irhc5 roscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on a:ij.tu. c 6rps)ka1zs n insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls a1s.cir) stapj 6u k:.zlong 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 Coulomb v :*4:twns5jayd ipjg 2)eu+h constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger:k9+-anb,3i4bmr t nv2m 2iu )maptpz in magnitude than the secnk9b2)m , b+t rup324maz:atn mpii v-ond charge.

  Sphere A carries a net charge and sphere B is neutral. The9i fsua6)4nqk0+r kce y are placed near each other on an insulated table. Which statement best describesau iq)96 sk +k0cre4fn the electrostatic force between them?

  Two charged objects attract each other with a certain fo:sng,rr*x.cb e.uv; .g da;k1z u2 zparce. If the charges on both objects are doubled w :;spg; .z2.ue1,b.x*dcgrv uaaznkrith no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive fo 2 f1;;fqg9rve dj,bzqrces of F on each ot2zv9g,jq bfd; r;fq1 eher. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each othe5nt:c xjze6((b 5y ishr with 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 centers is reduced to one-fourth its original va5y z5j sb((6xchtie:nlue? The force is now equal to

  An electron and a proton are separated by a distance of7+7 ck nl*fjny 1.0 m. What happens to the magnitude of the force on the proton if a se7kn+ jn*ycl7 fcond electron is placed next to the first electron?

  An electron and a proton are separated by a distr4z1mkugjs 43c k. :voance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron iskoc44:r u m 13j.zsvgk placed next to the proton?

  An electron and a proton are separat2ukt0 2 t.c; ffn*6+c 7 xe)opwcgppazed by a distance of 1.0 m. What happens to the size of the force on the2ct o.p;pcxa2kt fcgzp60en )7wu *+f 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 poizhu n67 /eqi6int charge of -Q is placed ai6/nhzui q e67t 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 the centroid of an equ a3d7eq d)ggs*fc2t/:irkx : uilateral 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 acts on the center charge due to a thii ud t*/c)2::da g7 ks3xgreqfrd charge of +Q placed at one of the other vertices?

  Which of the following is notcs+(.yh/z 5 jepg scjzq7de37 a vector?

  At twice the distance from a point charge, the strength of the electric:op2e,;gy h:v fradse/aj) oej:8 ,so field

  Is it possible to have a zero electric field value between a negative and posxp rjmxye+;k : 9f7m:d.ry,yqitive charge along the line joyjemx :x m:9;p,ydr r .7yqfk+ining the two charges?

  Is it possible to have a zero electric field valustb+g12 al ps0e between two positive charges along0 1+lbss2agt p the line joining the two charges?

  Electric field lines g ratzcj 9ix5m2*,j3bnear psitive point charges

  The electric field shom 8fc q.-6bdjq 09 hkypwgc7d(c gk,r:wn

  Can electric field lines intersect in frebywu6 5h+r:wgg.5l at e space?

  A solid block of metvpx7s;e m m1mf0i6p4n 2tep8p al in electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the t2mpp4i6;f0p 8xmp eevmn1s7electric field in the block's interior.

  If a solid metal sphere ai-vi. ppb 4n6vnd a hollow metal sphere of equal diameters are each given the same chargi6 .n 4pv-vbipe, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unt8du ak. oom(z j(/ 8qkb( o,zdm60lpmiform electric field is directed straight upward. What can be said concerning the charge on the m6/0m .lkd( ,pq88( ta zubjmzk(oodoblock's top surface?

  If a conductor is in e.igc e-j:cf+t 04dqthlectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that vbz6.6utfg; t is grounded. As compared to the case withoutt6 6v;gzbt.uf the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conej 3;t znovk7serkrkul6.es5 .* )(woductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is t0mr4a /s(hhv $e = -1.6 \times 10^{-19} \; C$. 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 protonsyj-57j 7wjtt8x mzaa 7 than elec7ajyxa jw57tz t8-mj 7trons does this piece of plastic have?

  What is the charge onr; hs88dsq7d1 bj.-u5etnutd 1 kg of protons?

  An atomic nucleus has a chargeix;n blc /o-5u of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separau 1 vgmlgz*vuu l96rdpw/)o-w8.yt6ated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric*p8g/)9 t6 amluyov6z-du w.lrv1g wu force between them?

  A 1.0-C charge is 15 m from a second charge, ands(17nutrmxu7 the force between them is 1.0 N. What is the magnitude of the second (m77run x1 sutcharge?

  Two 1.0-C charges have a force between th rv*uy5gz3:1wlfw0xh x yz s61em of 1.0 N. How far apart are they?

  The force between a a15)mid5d o;:t liu s8ja1szd$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experie bo/xb rmi66um9(bud5f4 rv:k nce a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between them?orf9m 6dbv 5(b:mb/k uxui46r

  Three identical point charges of 2.0 mC are placed on the x-axis. The firsnm*mq7(uoh w9t charge is7(h9n*wm qmuo 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 on the charge at the origin?

  Three point charges are placed on thnn4yhy+ 88u8 fmaz.2owofgn9 e 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. 9 fnwozmgno yn.y8f28u 8a+ h4 What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges arenvj36 t-gwk9c* 7j pqr 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 qpw7r *tc6k-g9 jjn3v x = -1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q .hkhwiz -pb14du*8wt is placed at the center of a square, and a second point charge of -Q is placed at t-hh i* k.8zwdp 4u1wtbhe 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 im(h .uhb42vgbv:i h*b4w9as q s at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of bb*shh2:b 9v gai4(mqvh4 .uwthe net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC1bim 4zt;x-vg7 hw9rtp s/ub. is at (0, 0). What is the directionbg.4 rb/it7u 1vswt - ;9mzpxh of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equi yhwjs7j g4 r5ye)b68mo8ek u(lateral triangle which measures 30 cm on a sioj(k4hy6) b57 jyg r8ewue8msde. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q; sn/(:u*qi py:*gbgxgla9vw , which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on p/wln 9v*x:gg:g(u s yaq*;bi it would be zero?

  A +3.0-C charge is at the o.oc cs 35b(qhq+xfr e5rigin 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 net force3h5 q +.x rb(cfscqe5o on it is zero?

  Charge +2q is placed at the origiq(v+7 f3 iyh 5tc diu94ndijq*n and charge -q is placed at x = 2a. Where can a third+qcjii nd* dyqt9iu7 f5v34(h positive charge +q be placed so that the force on it is zero?

  A copper penny has a-/s a2zax s x5oykb.95zfa/fe 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 force ofhx b n1p) 4v :g-kj7aklsl3sg8 gravity by the attraction of a fixedg3l 8g s-jk7phal:s4) 1vxbkn proton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common poinr;*2mz 6vqnhb/i -tc bt by nonconducting threads which are 30 cm long. Both are given identical charges, and qz*n2rbm;ht / bi6-cv 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 magnitudes/b (jx3s:dz j;jw4f*dw6crm of the electric field at a distance ofjj m/(dww6c4s d z fxsj*3r:;b 1.0 m from the nucleus?

  What are the magnitude and direction of the electriig,5n zu d6*+nbn.(j nux3umgc field at a distance of 1.50 ,( nbumzu5g +n*d6 nju3.n gxim from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What i t2xmme)trsh; .95)kzy z: mkfs the magnitude of the electric field at the location of the test cfs2;k.mh)kx ymz : t9 mtzer)5harge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of ) zdv g*56u4:xqngcr0o knz+qthe electrn xu zcgg5 o 6d4z:)*n0qqkvr+ic field?

  A 5.0-C charge is 10 m fr 3uylt ct;u8r9om a small test charge. What is the magnitude of the f;ylru389 t utcorce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C anmazw v u m;9 (ba8,nk1wf71rkcd are separated by a distance of 4.0 m. What is the electric field at a point midwmbwkmra917;v 1ukz wf,n (8a cay between the two charges?

  A 5.0-mC charge is plai .rdxvqx(7 f+eut5 pw1p)4 tyced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field afivutx) .4p(1 x5+pd wrq7tyet the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark ouh75ocj u,l i,8zqz +zd0hob;l ,whi2 f a meter stick and a -4.0 mC charge is placed at the 50 cm mark ,j7zqol,l5ch+w0dhizzu bh 2u;8 io,. 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. nov hq5pvtgl y2ux lck (5i2p;o2*9(m What is the magni2t(minlc29 vphgk( 5;xu oo*q lypv52 tude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50vy g 2 7yu;yj/vgkb1f4 ur:zqp:pxf.3 m. The last corne::.q4f u7;ggfy v2y ujzx3pbpv/kr y 1r is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which i/b veni1 .twall 0wpk*f/sp 75s 1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (as0l.ekv lp7*pf 5i//n1w b wt0, 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 )ztv;n:zuqq 6in a uniform electric field. What is the magnitu6nzt:q qvz)u;de of this electric field?

  A particle with a charge of 4.0 mC has a 1-e(5j bj a5fsf(ww romass 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 g is placed in an electric fx9ndv 2o8ailsh950f z ield of 6000 N/C pointing lf8dz9a9in0o5s2 vh x downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.1jmk:4jjlo1d ri zs*4.y 0i0se50 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. Whati:40k1isjz4 sdj y 0ej *rml.o are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnitue5z b xqfv( 6jx cle3o+()a(ikde of the electr3(jiaqcv )x+f6zkox( el5e (bic field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a chq9r,cx4im t8 *sc*wi marge of 3.0 mC. What is the electric field 6.0 cm from r i4qct9w*ic,s 8*mm xthe center of the sphere?