State the law of conservation of electrxwek js-;3yy )ic charge.

  Is it possible for two ndou1p /52ywmkom l.2v egative charges to attract each other?

  Is it possible for a positive and a negative charge to 5 07kyf:jezptattract each other?

  A glass rod is rubbed with a piece of silk. During the proces cctf(i-y5zbf cy+ t)-s the glass rod acquires a positive charge and thfb-tzycy5 i f)ct (c+-e silk

  A proton carries a

  The model of the atom sh4x 6q,zmr9w s( gy()ga8kjg qjows a

  A neutral atom alway(oje l(6rhzp ;h9g -0ar4zzc qs has

  An atom has more electrzsgwv ff) d0:tcq : z et1rv:sx43.9uqons than protons. The atom is

  Materials in which the electrons a rhslr+ mosva0:1 o*-wx5uzd8re bound very tightly to the nuclei are referred tal+w:s -h*0sz vrxod8 ou5r1mo as

  Materials in which the electrons are b:fc coan0zb 6 9,mv:7vmh.kpaj nbw31ound very loosely to the nuclei and can move about freely within the material are referrekoba.bf:cc07,mmjpn6w13vnvh9 a z: d to as

  A negatively charged pe8+at(;hzz.ndb9ca j3fv: trod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod wijb.9nf t;hacp +vez z :d3t(a8ll be charged

  Sphere A carries a net positive cha p.kmsjvvb(.flt+r o pdov 7 tf(0t(*1rge, 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 gr.sf.1(t kv+lop*( 0djvvr(m bft to7pounded. Which statement is correct?

  How can a negatively charged rod chargen4 -joy g 1 (d/gz/uy+m zm+wfhbfet8, an electroscope positively?

  An originally neutral electroscope is bri t1 pghg w-;k(kyi)e(uefly touched with a positively charged glass rod. The p ;(yw- kgekutgi1 )h(electroscope

  An originally neutral electroscope is grounded bq-cwd k4ka5; tzk//m adl3r5 xriefly while a positively charged glass rod is held near it. After twl;x a /a5tk5k/dkcr3z-d qm4he glass rod is removed, the electroscope

  A positive object touches a nbb*y3e t s6sg* l*fpv7eutral electroscope, and the leaves separate. Then a negative object is brought near the elec6pbb*l f3tg*s e v*ys7troscope, but does not touch it. What happens to the leaves?

  A large negatively charged o.ajwqie(y(; fbject is placed on an insulated table. A neutral metallic ballwjya(i.q(f ; e 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 each ball?

  Charge is

  What are the units of the Coulomb constf3eqb8cx 8 y-.5vcn h44fvevl ant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d.2 3 xsthgn:xb5c5zt.m The first charge is larger in magnitude than the second charge.x3csmhb nz:52tgxt.5

  Sphere A carries a net charge and sphere B is neutral. jr 8ycbpl*:fux;/4 pp They are placed near each other onxpyj8pl u: ;b /c4rfp* an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attracte-::zq7vjhq q.dk+ j n each other with a certain force. If the charges on both objects are doubled wi7n:-+e k vdqqj:j.zhq th no change in separation, the force between them

  Two charges are separated by a distance stz k5,c9ni9yd and exert mutual attractive forces of F on each other. If the charges are separatzycn9i5,ks 9ted by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other w0dq )n z -yko7zq;-gotith a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, andzn0qooq)kg z y-t;7-d the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proto o,8zilus/yi ke t4 v+ml;u41en are separated by a distance 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 electron?/suzk,vem;liu 1l+ i 4t8e yo4

  An electron and a proton are separated by a distance of 1.0(qys/w kh7 gc; m. What happens to the sycg;w 7q/hk (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 by a distance of2 fx;7hc/csu m 1.0 m. What happens to the size of the force on the proton if the electron is ush/c ;x m2cf7moved 0.50 m closer to the proton?

  A point charge of +Q is placed at thevb-wvf k10s0k 7yr7ro center 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 square. What is the magnitude of the net electrostatic force acting on the positive charge at the cw rfvb0r7sy-kv 0k1 7oenter of the square?

  A point charge of +Q is placed at the centroid (wz/fiz 7e5woof an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, a ( f75/oewzizwn 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 third charge of +Q placed at one of the other vertices?

  Which of the following ie:drp6n9jacx z1 8 x6ds not a vector?

  At twice the distance from a point charge, the strength of the electric f(u9rjnd yo1 *zield

  Is it possible to have a zero electric field value betwee c9ng( 5z pxo+k6agdz ob;7gpkez39 s6n a negative and positive asbcz o59;n639dgz k g+ o(pzge7k px6charge along the line joining the two charges?

  Is it possible to have a zero electric field value between o+; m hhuv pc(h6q:ts6two positive charges along the line joining the two chaqho(:s6vhuh6;+ pm ct rges?

  Electric field lines near *or1 r.lpqot) psitive point charges

  The electric field shown z3t o8 axase25k:-e 4lxxsgu5

  Can electric field lines intersect inyo da.i2z-x7 svq s:6 14jrgtd free space?

  A solid block of metal in electroloj9lj st*k:a ef: af:01;h ipstatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the bo 0pha:els:ik:1;ffl9j*atjlock's interior.

  If a solid metal sphere and a hollow metal sphere of 1a pq9co3qj.zsh ornm5aqk 5fa447.uequal diameters are each given the sameqs.nar q.ajp3a44zh 57u 59kqfo o c1m charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminui aay4ohq(nh,5 vr/ n 1dez o3w:f)4ydm rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be a54wyr/f(ovzyn:,3hq d di )o4hna 1esaid concerning the charge on the block's top surface?

  If a conductor is in electrostatic equi0- oe+ynzv)r;c uv3 e,,oqdvzlibrium near an electric charge

  A positive point charge is enclosed in af9 hfd-wht:7 9vni+yk hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphfkv- 9fdyh 7:hw+t9i nere has

State three properties of conduv .1)4 ic4hopfixl v+cq:vp*gctors in static equilibrium.

State Gauss's law.

  The charge carried by one zd(fxs-ht- 8 a3hsh ,telectron 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 hm,ykw f /g+x -wp(m8syas a net charge of +2.00 mC. How many more protons than electrons does this piece of plast(k ,m/ywy+pm8sxf wg-ic have?

  What is the charge o nf3+*7tm :v9gwig7 d,eafg mxn 1 kg of protons?

  An atomic nucleus has a chatv7kv q: x.tb+c4ut i,ha /n8brge 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, harepzii ;fdq,l* /k.+v ve charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between the;.f lvz i p*,kdi/+erqm?

  A 1.0-C charge is 15 m from a second charge, and the force between thekihirjjmm b+;2cb o 266c6x;em is 1.0 N. What is the magnitude of the second chargexr6c+m22j ck h m6;6bji;ibo e?

  Two 1.0-C charges have a force between them of 1.0 N.,nb6n*: x1) , dobls,u5ic8qrmq tnef3jz7r f How far apart are they?

  The force between a nlxiry46-gd7q7 m .sm$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience oy6rmdu*b 2c (a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electuc *b2(dro6 myric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axisz:pk5-nz4ikhc 0 -e iw. 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 actkwhzip z-450ce n :ik-s on the charge at the origin?

  Three point charges are placed on the x-axis. c 7ywb u)hs*q; A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0y)wcb *u7s;h q mC 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 located at the following positions: Q1 k runuxlrobc bvoy:v 0165( 84= 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 =5kox0luuyoc 8(nrb v4 b:16 rv -5.00 mC at x = -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 point ch x egey3y/5hb;arge of -Q is placed at the upper-left corner. It is observed thax5yhg by e;e3/t 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 at (0, 0.10 m); Q3 =wa:r/7dj)r b 6win ze( 5.0 nC is at (0, 0). What ijwbndew(z r76 / ir:)as the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0.* rz 9m3ghy /a,r.3r2(hk+ evdy:exvu g ceow nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). (hmh3ky 2v:r z9 xw r+r,gcoe/agdye.v *e.u3What 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 equil )dq7k*kxst7dateral triangle which measures 30 cm on a side. What is the ms)xqdt 77kkd *agnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q8ix-awv 6y f8n, which are separated by 3.0 m. At what point, on a line bevaxy 68-f8wn itween the two charges, would 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 origin and a +9.0-C charge;p j3hzl 4p0-wkt6sme is at x = 4.0 m. Where on the x-axis can z e;j w6tp0 hm-3slk4pa third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin al3pwhys 59 s(*o cvk1nnd charge -q is placed at x = 2a. Where can snok9c(1swpv y 5hl* 3a third positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 305 jt vved7ori)(vf(c (xh cd9.0 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 oof -v 2 )i hvdu)*svk+2hbvbw8f a fixed proton some distance above it. How far abovibfh2)so b28 vuhv- wvd k)*+ve the electron is the proton?

  Two 0.20-g metal spheres are hung from a comt hel3u:cc).ugo1 prwi) )y:tbbd 5)gmon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threab) prwc tth:cgbdug u5).:e1)o)i y3lds is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40euo1x;5 o,ihur1rdyp ey6g 4;xykznik(7 3y2d. What is the magnitude of the electric field at a distan6iuor2dyuy3n; kxgd5 i4;k1x 7er( zoyh1p y,ce of 1.0 m from the nucleus?

  What are the magnitude+ell0c5l9cot bq m*p6 and direction of the electric field at a distance of 1.50 m from a 50.0-nC cbe 90ctl6m l*5clpqo+ harge?

  A 5.0-C charge is 10 m from a small test charge. W1j c zadu5s+j;hat is the magnitude of the electri1+ 5sjz du;ajcc field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction og2rtqk3 ,s3i tf the electrsttri 2k3qg3, ic field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudecx zk*t:u)ml lohj6w )z t)rc4ry-;(m of the force experienced by a 1.0 nC charge plawtuy:(tcojhrzc);6 4r mlk)m) *l z-xced at the location of the test charge?

  Two point charges each have a 8zmmw,r3kcxf31 fe *x(t:ep bvalue of 3.0 C and are separated by a distance of 4.0 emz kcx: f1f(w8,x3mt3 rpeb*m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick (qq2o1o zad;hl4lz-lbjo/* p and a -4.0 mC charge is placed at the 50 cb jall2 z/lp1oz-(;*ohqd4 qo m 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 char 0 fdcj+7xwb;nl;-zw wge is placejfw0dbw7z;l c-+;w x nd 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 ud1gf()t uiox 8g;3t jmC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of thg8i)(dtuuf 1j x gt;o3e electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squareol(bf9 nsvyab4:fc5 8 of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the l vacbn8y sf4(bo9:f5electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges arvi8dc,2 nlsuza3 jh lxgv*53)aj 7gh4 e placed at the corners of the squarelg8 , hx4 djgh n3vzj32ui*aclva 5)7s as 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 uniform eleczm46v ih )5 cb7uw+xactric field.bxv4zm)i wh5c6c7 u+a What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass zub- )tnke 4hd /i9v2r -pbqz7of $5.0 \times 10^{-3} \; kg$. 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 fiehy0)g iq43 m ulci3xy-ld of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suih ) gi4x-cly 3u0my3qspended?

  A foam ball of mass 0.150 g )r+ ul*: .1 ijx/9s+tjhx sfzdgikex 1;b1hy tcarries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the 1gx.bi +9jj) xh;e+/z1yt:xss1l tuf * dhr kielectric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. Wha h6+bszu5oi l gip-),itukt/2t is the magnitude of the electric2 ,shibg5/tui6ik)u t +o- plz field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries vq+hm 9 fhj,:5hhvj4 xa charge of 3.0 mC. What is the electric field 4vj ,hhq+m9hjf:vxh5 6.0 cm from the center of the sphere?