State the law of conservfp x8 bd3 0(crh uj9,p8/f /hvwrpi(dcation of electric charge.

  Is it possible for two negative charges to attract each v2cy sut,j*n5 other?

  Is it possible for a positive and a negativ8viuf p1t gwf ()s2jgyudz;/8e charge to attract each other?

  A glass rod is rubbe-:p0 z3gltvf68aq :,fjzyldd d with a piece of silk. During the process the glass rod acquires a positi3z zpllfv 8, daf-j:6:0 qdygtve charge and the silk

  A proton carries a

  The model of the atouxe+.d1.htak zsj5 h, m shows a

  A neutral atom always haz/4 w+skx: e0bzuo 5xns

  An atom has more electrons r* 0 z w:a(pq8x:/hw7d2ybypdsxrf9 w than protons. The atom is

  Materials in which the electrons are bound very tightly to the nucleir)n:e9gkarj .ry ot 6( are referred to aoa)g9r k6(:.yr tnrjes

  Materials in which the electrons are bound very loere . (if1 ffp6ps::l3yvrme4osely to the nuclei and can move ap (s :eiefyrr4fe lv6.:3f1pm bout freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. Th /qguaxjxr2c.vz 50/xe end of the metal/z/vgx c rj.xx20qa5u bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutqfgpm cg5k:8f1qw j4 z z.h-s:ral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. W 8g :gcmfpz-h. jwfz514q:kqshich statement is correct?

  How can a negatively charged rod charg2i( zw,545ido gsqw sazcsh y-/ o.3dhe an electroscope positively?

  An originally neutral electroscope is briefly touched with a posi;sw)otzqv, y -ji 3hb3tively charged glass q) vij3ht3y zw,bso;- rod. The electroscope

  An originally neutral electroscouy wxb)p.oe3 *pe is grounded briefly while a positively charged glass rod is held near it. After the glass rod is rem)web *ox .pyu3oved, the electroscope

  A positive object touches a nek:*g9p4;yb fxsot3l( u;vz16xuhacy utral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it.k:zg1y(s;3ufa b*4o96t xyh plx uv;c What happens to the leaves?

  A large negatively charged object is placepm:; r f s;lju6nb,f6sd 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 pa;sms l 6bn6pju;r,f f:th 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:e(j3 5ar ohpijzln.cxqn5. 9lomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The fdb*dsis rj59*i 2 7nuairst charge is larger in magnitude thanua5 * 2*9jbisisdd nr7 the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are plah+e +5dh7hcy+q6d x yoced near each other on an insulated t hhh xq6+yd+d7ec+o5yable. Which statement best describes the electrostatic force between them?

  Two charged objects attract ea*b)1rp- qf: 9tz kye;+n/zaa4skd.wre 0 zs aach other with a certain force. If the charges on both objects are doubled w+ a qkraea/-rp0ew ;9dan:y1 4bsz *zzstfk.) ith no change in separation, the force between them

  Two charges are separated by :(hv ld kfv-8nh/ydlxk7( s y-a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutualdnks y-k f h(lv:7-y/8dh(vxl forces?

  Two charged objects attract each otvjs+7h8 .n6q 5p a, dzjunk8asher 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 value? The force is now euvaa zn.s5q nj 786j hskp8+d,qual to

  An electron and a proton are separated by a distance oflp1+z:f.qc x-f lt; ga 1.0 m. What happens to the magnitude of the force on the proton if a second eltaq:1xfl-+g;.pcz fl ectron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.vai51m k+k k2airk9p ce ;9)lry(bjr90 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to +bayrla; k rkk)9ir9e9 cvjim5(1 pk 2the proton?

  An electron and a proton are4b0 7lnndwvd , separated by a distance of 1.0 m. What happens to the sizn,lbn 7vw40dde 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 poti znczvle(c gii 74z22 al-7 :t0t-nqint 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.zl:v7ann zcizt7(tc2g0 - 4iqet li-2 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 triangl .hr0ul 0cio gp;,0nmee. 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 third charge of +Q placed at e0 mlp. ;rhcn00gu,oione of the other vertices?

  Which of the following is p s )5kgou8ah2not a vector?

  At twice the distance from a ymj1w2q j( cu7point charge, the strength of the electric field

  Is it possible to have a zero electric field value between api gy*jl/:j vo;shu3. negative and positive gp;jl sh :o.uvy*ji/3 charge along the line joining the two charges?

  Is it possible to have a zero electrbjtc5j yvmr+./tg (id o0*x.uic field value between two positive charges along tj ud.xg*(c0otm itr.5 b+y /jvhe line joining the two charges?

  Electric field lines near psitive point cw 0u on)azf:j6harges

  The electric field shcq .mj9+.xllj own

  Can electric field lines intersect in fregvfvx 4a +yh;.u70 9fgzod5sle space?

  A solid block of metal in electrostatic equilibrium is placed in a ei2qb d 8hl l-8ay:lu+uniform electric field. Give a statement concerning the e+-8 i:8 h2edlaylub lqlectric field in the block's interior.

  If a solid metal sphere and a hollow metal s 6nq :twl 2gl./u0omwpphere of equal diameters are each given the same charge, the electric field (ow 6l w:/lunpt .02gmqE) midway between the center and the surface is

  A cubic block of aluminum rv-8-z y.p2uyu)gl icoests on a wooden table in a region where a uniform electric field is directed straight upward. What can be saidulc--i) v8ugp yz2o. y concerning the charge on the block's top surface?

  If a conductor is in electrostat,brqj*lh0 mm7 ic equilibrium near an electric charge

  A positive point charge is enclosed in cckw vzx;o 7:0i4 +giia hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point direck;ixc0zic w iv go74+:tly above the hollow sphere has

State three properties a8fhks4 y 9wxhn*n;fttr,+) fof conductors in static equilibrium.

State Gauss's law.

  The charge carried by one e1tp90uba yy6 slectron 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 zwin 8t8n(hnr)0b/n q mC. How many more protons than electrons does this pien80b8zr w)hqnnnt /( ice of plastic have?

  What is the charge on 1 v fn6atg e+(ps5lc1jj 3huf4-kg of protons?

  An atomic nucleus has a chagb898m /bsmi gp/ch*irge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separ 78 23zxtd9*lppabgi a/ti )/oiipl,pated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of t/p p * 3gipta2btxz olp)8dai /9il7,ihe electric force between them?

  A 1.0-C charge is 15 m from a seconap ,u)mz2v.cuyu: kwa: p/.iud charge, and the force between them is 1.0 N. What is cp/. .iu z):a2 k,:amyvuupw uthe magnitude of the second charge?

  Two 1.0-C charges have a foa.4/ v/n9ajij 8( +guwij ohkwrce between them of 1.0 N. How far apart are they?

  The force between a 8 ma2im 8kx3er$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, in e3x-dqr/z(th6fign 2,c4q fqitially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is thxic2r3fzhq nq4 -6gqt fd/(e,e electric force between them?

  Three identical point charges of 2.0 mC al4.dm8d5 jlrqw/ l kx5re 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.dr dl/qw5 lj.4m5 x8kl 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-axis. A z ka) ;:i jn9yy3,rtzxcharge 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 electrostarzy,i z9j; tya3 ):nxktic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mhe5: )m *zfl3dmwa 4xgC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitudwe hmgf*):a5xlzd3m4e of the force on the 3.00-mC charge?

  A point charge of +Q imt ei, ppb44w2;uws s3s placed at the center of a square, and a second point 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 ofw w3e;s2spb4ut4, pmi 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); Q3q8 8nd5j xpe3l = 5.0 nC is at (0, 0). What is the magnitude of the net force onl58x8j3edp nq 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); Qkmdi//r2u;4ij-: uynn-pyp ) +yaxcb3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 db2+pni/ myna u/r4y)i c:x; -py-ku jnC charge?

  Three identical charges of 3.0 mC are placed at the vertices g+ djy-e dux:pn b 0oebt:q;67of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electro utoeg0: dd6bpqxy;e-:n+7jbstatic 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 pox w7pfb+ ,nssqiss(z *+rojr31jb- f- int, on arp qs - sz (n+xbjrfwbo*,+j 1fis7-s3 line between 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 mxy7;caz l *-j/kr(c 6ill/,: pdxfgz the origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a thakp,lg: 7 rzx/c y*df-6(lx/ jlz;cimird charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where ze +qkn38ai)w */q tofcan a third positive chafz/qo anw t)eq3 i*8k+rge +q be placed so that the force on it is zero?

  A copper penny has a mass o y( fu5dd8fdwh h,zuf5m2-v8ef 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 gravity by the attulo6.+m1-o7iltgr6z wer. 2 i ocda8eraction of a fixed proton some distance above it6z8 +i2r67i utmgo.e-r 1old.cae owl. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a c8:7revm7m2qdf,p1kl1 vzdw qommon point by nonconducting threads whm qek7v7,lwp:1m8dr 2z1q fdvich are 30 cm long. Both are given 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. What i+ g ucmb:ljt4a548mwu s the magnitude of the electric field at a:gauj45u cl+t4mm8 bw distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance of w k(drfh6 ,t)l1.50 m from a 50.0krh6d,(l)ftw -nC charge?

  A 5.0-C charge is 10 m from a small test jz6j:w d .kmixgw92t8 rc(,nb charge. What is the magnitude of the elexnjcm8it:., wr 9b(kz6w gjd 2ctric field at the location of the test charge?

  A 5.0-C charge is 10 m from a k4+ts.3xcz( fqs (o 1.jrqzkg h;o m1tsmall test charge. What is the direction of the electric fiel sq+f.oz . x;431rmqkg1 h jczkt((tsod?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of 9-siah x+ y5h ,sfon6jthe force experienced by a 1.0 nC n+5jih o,ass- yx9hf6charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are tb2 ah42 ,(iwvsp wrg6separated by a distance of 4.0 m. What is the electric field at a point mid ga2 s(bihwv 4rwt,6p2way between the two charges?

  A 5.0-mC charge is placed at the 0 cm ma9 513 sm3v bwyjdcn5hx.sd9jark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cjsy1sj. 9953x 3 mdwdcn5ahbvm mark?

  A 5.0-mC charge is placed at the 097. x(m1b1fdqsg5n+lcsdjz o 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 the electric field zerg q( z1s7x1 nb jl9.sdf+omcd5o?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.203ohu fu8s-, dq2td wxpbj1m2. m. What is the magnitude of the electric field at the point1.q owmtu,-dxuh dj8 32pb fs2 midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0..tnyu 6nx4aca8n0 p4g50 m. The last corn6g48 .uy n0a4npt axcner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are pla55 iz pte:e6v*kmrap- ced at the corners of the square 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 centermvtep*5 pz 6keair- 5:?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniff;j 0,hu1y lkf7ru6q lorm electric field. W6yf lurk0q1uh,l 7;jfhat is the magnitude of this electric field?

  A particle with a charge of 4.0 rm1 hn t9b9oyl)2l8h qv;+wx ymC 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 0.120 g is placed in an electric field ox2cx0/tzkjt- o) o f(rf 6000 N/C pointing downward. What charge must be placed on the ball fo o 2ctr/j-txo zkf)x(0r it to be suspended?

  A foam ball of mass 0.150 g carries a mv :zrxu8m,y (charge of -2.00 nC. The ball is placed inside a ,xv(mm r8u:z yuniform electric field, 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 carries a charge of +2.0 mC. What is the mag(p9mw dqtl ft1e8g/9lr: , qwnnitude of the elw: lq9 t e1dpwq8n(t, lf/mgr9ectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What i2 0a6 4dsg71rjjlxprgs the electric field 6.0 cm from the center ofg2 7rrs pj6xd01ajl 4g the sphere?