State the law of conserqego.52:h;hue1vdru+l m p+s (kpu s ;vation of electric charge.

  Is it possible for two negative charges to attract each zd4+svq;qnlk2j ; e;p other?

  Is it possible for a positive and a negative 20mice p;9la ncharge to attract each other?

  A glass rod is rubbed with a pies.6r zz .ui8vwyjm 1o8;w7lngce of silk. During the process the glass rod acquires a positive chaw.jgv; zi l6ms7 .zny 88orwu1rge and the silk

  A proton carries a

  The model of the atom shows ax8uc r. 8efcf4j0*3 bes)p.fw cnvu )k

  A neutral atom alway72amkp rbx*5n s has

  An atom has more electrons than p42cecp 1p5 ngpm,es m-(dfouw6q;j -protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei areg eqib m.pi,/ qwc5e,.v t0k)d referred q0 etgq5 vcm ep,.kbd,i.)/wi to as

  Materials in which the electrons are yu- 3zwq.,*qyfovxjt+ p4l b;bound very loosely to the nuclei and can move about fre *,p.3-o+yuy4 ; fqqxvtwlzjbely within the material are referred to as

  A negatively charged r+k5wfh00wy 8flnj7 u lod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from thewkjuw 87 0nyh5 lf0f+l charged rod will be charged

  Sphere A carries a nej8 +h2muk*cflbqomc-k w/ai7:h+lcvik; b );t positive charge, and sphere B is neutral. They are placed near each other on an insulated tabh-2ih )*cw/b+b;a7 ijul ok8c+lm: qm ckv;fkle. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charcz0s05zwnln/l yai:7ge an electroscope positively?

  An originally neutral electroscope is briefly touched witlc1gn h8ro2/sh a positively charged glass roo8l12 gsc r/nhd. The electroscope

  An originally neutral electroscope is grounded b1p/.vrz j2l ;v: ebblisjxik-byh 3)4riefly while a positively charged glass rod is held near it. After the glass rod ie;yib)vxsbilz2k vjh/l bj 1-3.r:p 4s removed, the electroscope

  A positive object touches a neutral electroscope, and the leo3q2gvlp tnia,i:2 o)mirc, +aves separate. Then a negative object is brought near the electroscope, but does, :ig 23a, n+rolqoci)miv2pt not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. Ahv:n2j cllcd gy/ rc h457h-6j neutral metallic ball 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 ballhjr:-7ln/hlcj46 gh c5yv d2c 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 Could3 bp ,uf f+mcxukl5:.omb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distanceqx0 55k imhsi4 d. The first charge is larger in ma04iimx55 hqsk gnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. Tk8sk tnlb31/n.3 fc7pw bvb) nhey are placed near each other on an insulated table. Which statement best debvl)c 3s3nb. 8wk n/f p7tkb1nscribes the electrostatic force between them?

  Two charged objects attract 4 n5sw zae-0aweach other with a certain force. If the charges on both objects are doubled with no change in separation, the for -awnswa 450zece between them

  Two charges are separated by a distance d and exert mutual attractive nchh48kv2uka;na(tib 9k 9 2bforces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual forb kc(nk9un 2429;v8kt hhiaab ces?

  Two charged objects apy1m9kl a;1iqo(2qxi , w :xvz*m q0sqttract each other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, andq:,mpv* 9xq;szq 2qxwi0 amlk1 o y(1i the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are sezsn n6ylkgu i0vj64luidmz:(5m93gvq3 ) ev*parated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron i 46q5m6u( zy93vzkjsvlue *gml)n 3vi0:idg ns placed next to the first electron?

  An electron and a proton are separate.qyz w(x,wwf(d by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second elecq ( (xw,fyw.wztron is placed next to the proton?

  An electron and a proton are separatedi9n i7;fs dzt4 by a distance of 1.0 m. What happens to the size of the force on th4it7;sd zif9n e 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 unc+eb yo +f(+jx7hi1point 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 i x+b enof(j+17 uyc+hthree 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 centroivfsj 0v9t mx5-cw8 tpy*hpg4 .d of an equilateral 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 w9ypth 0 c5v4s*.8m jfvtpg- xthe 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 not a vectorwm3m3at (r7kgy9z/zj : ejr* j?

  At twice the distance from a pointaenn 7 9e;cne*ot 4/om charge, the strength of the electric field

  Is it possible to have a 2l w3huu7 ep9( rbse1jnu,i2t zero electric field value between a negative and positive chau1j7 292e slh 3tbiu,(nwr ueprge along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive ch)ztdts3 el/mr d ;6vw1mp4m;f arges along the line joining the 3wm r6p)dslme/ f4dtv;z;1t mtwo charges?

  Electric field lines near ps;mh/hivaa1dd3c 8 wx8 itive point charges

  The electric field shown vkm7cum,p0e 6

  Can electric field lines intersect in free dh:0 ,gapsnt0 space?

  A solid block of metal in electrostatic equilibrium is z /ymd8d5gy.b placed in a uniform electric field. Gibdydm/.y8 gz5 ve a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal di3vjh+*eq3ramqgj vj1tjp m3 ;ulk3* k fkw+::ameters are each given the same charge, the electric field (E) midway between the center and the surface i1 k:3j+:wmjftvqhu *q+ ak ;e3lk3mjv3g*rjp s

  A cubic block of aluminum rests on a wooden table in a region where a uniform elwlpbx 8 x (ip 6h0t;0ybwl.ht)ectric field is directed straight upward. What ca tx ip;wwb0p hxyh.0bl6)lt8(n be said concerning the charge on the block's top surface?

  If a conductor is in eldryw .doh0f 54w/g0;oyyzf 5hectrostatic equilibrium near an electric charge

  A positive point charge is en32-b , -zis/:x+bvvobko i 7xne/uz lpclosed in a 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 sp-o solb,/ibzvz32b+-nx kip7u:e vx /here has

State three properties of conductors in static3nxpog q;5qf 9 equilibrium.

State Gauss's law.

  The charge carried by one electo b/*(ym8dbz hron 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 than ele)uxbzw1b8yt 3ipm., uycz16tctrons do b x, 3 6puwcumbyz8tt)i1.z1yes this piece of plastic have?

  What is the charge on n5li9mpojo-.j *e9:7 5ixo zwns1q ol1 kg of protons?

  An atomic nucleus has a ch9bs ,4fjyhn f ec4,)ewarge 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 values of 2.0 awb4ml1a/ v gy:nd -4.0 mC, respectively. What is the magnitude of the electric force betweglwm:avy1b/ 4 en them?

  A 1.0-C charge is 15 m from a second charge, and the force bet9mom.zr t):0 )bkq omrween them is 1.0 N. What is the magnitude of the second cham br)m:zr )0oomk.9 tqrge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are thea:2tt,f t n+5;erf txnwfp/dqr2 u;a/y?

  The force between a hn62zx( 9.kjf hh6cq x$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0b3zww9c ;baa j6b,39fizmv i0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8z9,6m 3zfwb0ajbii3 bacwv;9.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on l9+qcgx/faae(5cr o;:, pj zj 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 electra:ce/fqpjx rz ;59 ,al(+ogcjostatic force which acts on the charge at the origin?

  Three point charges are placed on the xlc h/-depp *lea2iy5 jwp.6k ;-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 the magnitude and direction of the electrostatic force which acts on the charge at the;jp 6l*ei.ey-d/5pcwk aph 2l origin?

  Three point charges are located at the followingj7yrfmwx: .t6 positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the yw6. 7:tjmfxrmagnitude 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 o r-mq(7fcv+m8gwx;l -oc/h ypoint charge of -Q is placed at the upper-left corner. It is observed that an eleco( vg mwo;cy -c -/8fql7rmhx+trostatic 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 5qh j1 yk3-hwn= -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of ywh3 jkh1n-5qthe 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 nCfc q3l k; lprtp7u3m44 is at (0, 0). What is the dk3pfll73p4 mt;uq c 4rirection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed a,fg7h68 fkzy f jt-r)xt the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostaticg r-kfx f6hz),7jyf8t 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 poi 1etal ;k72zrlnt, on a line between the two charges, would it be possible to plz7l t 1;aker2lace 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 cha(bm 5jr5p;n fmrge is at x = 4.0 m. Where on the x-axis 5fr(m;p njmb5can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is plalcy3mu*au n:,ced at x = 2a. Where can a third positive charge +q be placed *n u3uy:m ac,lso that the force on it is zero?

  A copper penny has a mass of 3.0 g. jgs, as+3.ut tjn b(5xA 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 fhehb3dcj+)ox z6- t9 korce of gravity by the attraction of a fixed proton some distazdec3b9-o)6jkh x+ h tnce above it. How far above the electron is the proton?

  Two 0.20-g metal spher0 z8m)fpm.bvaes are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the elevf)a. z0b8 mpmctrostatic 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 magnitude o;0e8;vn 2gdvxg daqp0 f the electric field at a distance of 1.0 m from the nucleue;vxa2g 8d0d;vgn 0 qps?

  What are the magnitude and direction of thme6sz ty xomtdgm:;33.l 40sq) -cazre electric field at a distance of 1.50 m frome4sm;dlgm3ct6:s-0 y.rz ) qax3t mzo a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude gd6g )hjd z7 a*19zghtof the electric field at ttzh a7*9d 1gd gjh6z)ghe location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What isqku4bwzs;( 9 e the direction of the electric fie94kzse w u(q;bld?

  A 5.0-C charge is 10 m from a small test charge. *cjm+tjzqn) )1 /tljn What is the magnitude of the force experienced by a j+z / qt)mct)1n*l jjn1.0 nC charge placed at the location of the test charge?

  Two point charges each have wl d-t05m gg;aykg +t+a value of 3.0 C and are separated by a distance of 4.0 m. t+ +w dg0ay;k-mg gt5lWhat 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 and a -4.0+/pd3mf hbuz1c rsx+7 mC charge is placed at the 50 cm mark. What is the electric mz r h+b px1uc7df+3s/field at the 30 cm mark?

  A 5.0-mC charge is placed/)p sqt6 2mlmr at the 0 cm mark of a meter stick and a -4.0 mC charge is plact)lm/ 2smq 6pred 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 mC and -7.0 mstf)+p )nw98j bgjae8C are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between w p)8sga fn+e8 jt)9bjthem?

  Three 3.0 mC charges are at the three 0 gezn)9.5 ebheqdq0xr3uc n3 corners of a square of side 0.50 m. The last corner is occup9 cne0uz3. 3dh )qgx5beqrn 0eied 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 snr3xg6ul 9 ;im m+9 aaiqk3;zride. 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, 1). What is the magnitude of the electric field at n93milqx ;uk+rzam3a g96i r ;the square's center?

  A force of 10 N acts or0 4moq2o ygg q lpyr1)+7z3gpn a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this eleg3lrmrq o o2y1g4y0p )gq+z7pctric field?

  A particle with a charge of 4.0 mC hasfoa5rqe: w* s68pe;ck 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 0.12 z;pse i jzew;8lp-l220 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball ;j; z2lpi82 -ewlspzefor it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed co/t) (/eb1srfz 1 nvmu16git inside a uniform electric field, and is suspebt) i (r1otmg/szn1 c/1f6euvnded against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a l 6cj5 fa*46drnrin;ycharge of +2.0 mC. What is the magnitude of the elect*l5n di ;crnya646fjrric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a ch 9m .d2jdt0qm dw8 gdz3g.ya/iarge of 3.0 mC. What is the electric field 6.0 cm fritdw38/gmqa.2 gz0d m 9.ddjyom the center of the sphere?