State the law of conservation of electric chxijol3b( mmvw5j.u12 s 8nv-zarge.

  Is it possible for tw,prnl -mjzq 3;o negative charges to attract each other?

  Is it possible for a positive and a negative cha28)f;jki y9i gl,voqtrge to attract each other?

  A glass rod is rubbed with a piece of silk. During the pi2zq 9y5enp1)iei : tbrocess the glass rod acquires a5i9i qyi1pe) tez2 :nb positive charge and the silk

  A proton carries a

  The model of the atom i 0:z/z)dlicxmv*r5 a shows a

  A neutral atom always)olmr(gy+1nkc 1 +hgcco .m0 r has

  An atom has more electrons thanon xf)n u)r3g( protons. The atom is

  Materials in which the electrons are bound very tl ds4p(wfx(idfv )( t1ightly to the nuclei are referred sd)fwt 1 pxif ((d(lv4to as

  Materials in which the electrons are bound very loosely to the n1-bxvhd0f4ao4 l h+xl uclei and can move about freely within the m +ha4xh- xv0db 41flolaterial are referred to as

  A negatively charged rod is brought near one end of an uncharged metaj2:p+qiv in i(tp8wc+/mg fl5. cvf .bo(a-y pl bar. The end of the metq p if.v p ili(gnywp85+vacf(. +/ bjtm2c:o-al bar farthest from the charged rod will be charged

  Sphere A carries a net positkyeu58tr2d9lq -.aa oive charge, and sphere B is neutral. They are placed n.8krlt yo eqa-a29 ud5ear each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge a:aowz1 66 6 u7zfvmpzyn electroscope positively?

  An originally neutral electroscope is brief c)n,t)ue5 nyrly touched with a positively charged glass rod. The electrn ry))en5,uc toscope

  An originally neutral electroscope is grounded briefly while a positively bgw7or-/if f/ charged/b-f7f / gorwi glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches :dxc0 tm ju7x8x45 pbra neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but 4mx 0c7dp8b5jrt xux: does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated ta :4 o7,,d qdgyufdxxck ec6j28ble. A neutral metallic ball rolls straighto x4fu2c 6c78dxe, :,jk gdydq 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 consta-*4gopau dkj7 nt $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. Tha2;/niyb 42;tr fdzkbe first charge is larger in magnitude than the seconi2bd;4f a/ky; ntb r2zd charge.

  Sphere A carries a net5hituv9 ity 24a we1n4 charge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electro4y24 5ua9thevin twi 1static force between them?

  Two charged objects attract each other with a c +;.m4qf6x:s yxk/zwq2x3vhi y0lk p uertain force. If the charges on both objects are wkp 6 3khyyvz q/s:ilx .240u;+fmqx xdoubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutualg au:goif0 joa 5x4;0ch,0q ya attractive forces of F on each other. If the charges are separated by a dista 0oauq00x o5 fhg;4a cji:g,yance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a ik(ns10 srlk1force 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 origin(n 0rs1s1 klikal value? The force is now equal to

  An electron and a proton are separated by a distance oyq(x p;c)myu yja9/ y+f 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the f amj y9/ ;uc(yyp+xy)qirst electron?

  An electron and a proton are separated by a distaqe5gi-0p uqsi-j ee/7nce of 1.0 m. What happens to the mageqs0qi--u e5ej 7/gpinitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are sepq 1uj,iiejt 1 kfn 8 5,quf)wm*qf5xi44w2tudarated by a distance of 1.0 m. What happens to the size of the force on the protonq 1u8 2ji*tifw4iqf,4w)ek551uxqn ,fut jmd if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is plac* pi 1q0xf 9ys5x9 pwtabka8s0ed at the 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 b s10a9i* x8w9p5k xy0qapfst2.0 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 equilateral triangle. Whurhb6el 4d 1x a(3mj 1/vbamf4en 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 j4 m b3a1b/m4hxl6 fde1r vu(aplaced at one of the other vertices?

  Which of the following is not a v)ktj. ,1m,ddy8btxfx3y rz0 kector?

  At twice the distance from a point charge, the strength of the -j6,gsd b6t*c4e xkrrelectric field

  Is it possible to have a zero eluo.;irk j tp+z-4 um:hectric field value between a negative and positive charm-;+.4 izujkut ro p:hge along the line joining the two charges?

  Is it possible to have a zero electriccoq1 n6 k:lb2,tjx c+x field value between two positive charges along the line joining the two chargc:tc6xk+ l1jo,bq x2 nes?

  Electric field lines near psitive poimuh/5mhs *z( gnt charges

  The electric field shown ta.(r ( xe1wm )x ugg1o/gj8sd:znx,s

  Can electric field lines inmw (csx,bgib3 nw.f4 ke p:u f-.u(9yytersect in free space?

  A solid block of metal in electrostatic equilibrium is placeza+-pl thv )krb-61 spbhj)l 6d in a uniform electric field. Give a statement concerning the electric field in6pbvpbtr)+-hl6lzhjk)1s - a the block's interior.

  If a solid metal sphere and a hollow mec (v+mr) mg kwrzrc4a-,8hm4w tal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfa8mr4,ark- 4w( z)hcmgrv w+cm ce is

  A cubic block of aluminum rests on a wooden table in a region where a u9e:x *v7e nesb *e5+d j*uxmtuniform electric field is directed straight upward. What can be said concere +s5*me: utj 7v*eexbdn*u9xning the charge on the block's top surface?

  If a conductor is in electro:wp 9 aobl,yl,static equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that ispptc,7vky1k s jqg+) 4 grounded. As compare+v ckgtky1q7,)p 4ps jd to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilh 6t844. nkrulqvj( bgibrium.

State Gauss's law.

  The charge carried by one electron q jw1bep2-9u dis $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net charge o(x7ia vtbn8al)z 7cz .f +2.00 mC. How many more protons than electrons does this piece of plastic(x7vt8ia )zz.b cl n7a have?

  What is the charge on 1 kg of proton t5wi)d2sgurmq n-5)ts?

  An atomic nucleus has a clfu.2dqe t,a ,7:qrfaharge 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 v4nhbg i72 ;zmikgn,f4 c7a2klalues of 2.0 and -4.0 mC, respectively. What is the magnitude of the elecbil2kzg n27acm7n,g 4 k4;ifh tric force between them?

  A 1.0-C charge is 15 m from a second charge, and the : 8rlaxubxun3vf; 7b.force between them is 1.0 Nblb;7n8rfauv x :x3 u.. What is the magnitude of the second charge?

  Two 1.0-C charges haudglj:x(3v vx6uvqk 53- b,lqz0m cl7ve a force between them of 1.0 N. How far apart are they?

  The force between a is,/t mbo8d6.0 x izwh$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, ini*qb 6dm80vhw:u +ur :v5r hzopxiq3s,tially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new seohbu vhp:m: ,6v0rx8 rq+q uwz3*s5 idparation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis.xmk4:ctv1 f8k 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 directionfvxc t1m:48kk of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is plamele9oi 4sa .og 4o,,px8ateq)qs+ n5 ced at the origin, -2e),i lo4a mspx,5nee89gotso4a+. q q.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 electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following posguw0 b e)fc:r/itions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mCwu/: g)e bf0cr 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 cm,xpw 5 110jnktrnym6 enter 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 of the force that acts on the center charge if a thirdwpn5n m 6y1trxjmk 10, charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m,-.i0 jyjm /p 2qs5vz5zcysn6i2 e wyv5 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0cwy-/ynj msvi5ye55 2z02zi p6vqs. j). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); ;6thw z;p3lh fQ2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is thhhzpl ;6ft3 ;we direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placfk*+75 jick zhed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostac*zk j ih5f7k+tic force which acts on any one of the charges?

  Consider point charges of +lps (dmqx u5:6fw, dt);wt/a cQ and +4Q, 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 suc;,:)d (t6/5lps xwqm cutdwa fh 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. lm;;zgpb8:yz)x7a ci0 m. Where on the x-axis can a third charge be placed so the net force on it x)a;7z cmp;l:8 zy ibgis zero?

  Charge +2q is placed at the origin and chmt270m (yiv r5 f;q+uspx )gobarge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zero;f)7ryxsq ubm + o mv50t2p(gi?

  A copper penny has a mas-kim:h bk unj;l5ls1ad gbz3 m6 cz:-+s 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 of gravity by the attraction of a fi 1oej8vyfcr a/ev 2,9rubr92mxed proton some distance above it. How far jev9,e8cory mbu9r /1 f vr2a2above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point b:p,n6 lq 5,ovnn3.z ghbo8mt (c4xx hfy nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apar:xxnl5vczo(fg64o8n ,h, 3p bn.hm qtt 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 magnitude;ves;lgqko,;to 2 od2 t3w6*fgu i3 pk of the electric field at a distance of 1.0 mkge3do;;6u fo,;qv*lp tg wk23st2oi from the nucleus?

  What are the magnitude and direct(ijhlcb67/r 4a v (sqfjqoe ++ion of the electric field at a distance of 1.50 m from a 50.0-nC ch7c rq+ilj(oheqjs46fa+ /vb (arge?

  A 5.0-C charge is 10 m from a small test charge.wh,pk( p-gj+c7qxuohm .i2pv 06l bg8 What is the magnitude of the electric field at c 2vmgp8 xgw,h+7pju0 bl6 (hpoi-qk .the location of the test charge?

  A 5.0-C charge is 10 m from a small test ch em10 f uxgx9wa*1rznlt5e 8sri*. o(carge. What is the direction of the electric field?91x 1(leawmrx*8uig*zcfro.ne s0 t5

  A 5.0-C charge is 10 m from a small test charge. What is thxho.hgi n;zf5gde9ijw 9l: 6qzv8:z 8e magnitude of the force experienced by a 1.0 nC charge placed at the location of the test chi8hd5 z j8 . 9i:;e 9:ghxqfowl6ngvzzarge?

  Two point charges each have a value of 3.0 C and are separated by ae)v/od3(a;va j ny2na distance of ;onea)(d/ n 2ayv3 jva4.0 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 stickcvx68 hk half:*0ew4- /xowdn and a -4.0 mC charge ihv-w:4/ kcnelaf 0 d*w h6ox8xs placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm m8gy*qr8p/*hirx/q +addj 8doark of a meter stick and a -4.0 mC charge is placed 8pdrq x8/+*ago* dri/ j dyh8qat 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 x9wv qj)qmng 0y035 xtly,f8py = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between them?q,t g jnyyxf5lpwym0q38 v )90

  Three 3.0 mC charges are at the three corners of a sqoj y5uas,(pw -uare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the elecyja up(5wo s-,tric field at the center of the square.

  Consider a square which is 1.0 m on2mn15bedoe;im s 3 egw ok8:d3 a side. Charges are placed 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, 1d8 ;ebioe 5kmesn1 g2w3m:d3o). 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 wal5m9s7wcue 86hl ko /hen it is placed in a uniform electric field. What is th7llmwk u/hoea 5 869cse magnitude of this electric field?

  A particle with a char;ei qg/;pmx;9:yn k/wir4 nwdof a9/rge 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 m:5jr3. zridex ass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed or.j:d3r5 zxi en the ball for it to be suspended?

  A foam ball of mass 0.150 nru )nsh-g it;15t:lxg carries a charge of -2.00 nC. The ball is placed inx 5gtn:;rn i)1s- lhtuside a uniform 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 m3a, 7lwl)lbsk .4 dtcmagnitude of the electric field 5.0 cm from the sphere's sul,)bsk wlam3c t.47 dlrface?

  A metal sphere of radiude(t s aiy yz: c,dv; q(9lc-pwvu8k73s 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the;tq3d ca c z(l:u,ie ydpy8wk-9(7 svv center of the sphere?