State the law of conserz- o1h5glmhl2:4;nzwa7af,nyur n-e vation of electric charge.

  Is it possible for two negative charges to attract each other jr lvqs z atq8*u3,k.iiwu5 a(,(c1xu7 wm1fl?

  Is it possible for a 9le8+yruurc; .gl v3wpositive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of s (,wtr;q ,wqfot--ekuilk. During the process the glass rod acquires a positive cha,wt(;w r-ke-fu q toq,rge and the silk

  A proton carries a

  The model of the atom ec9a/8 6-rwb 5qihx+8b6r-l m 7tnmimak6 hjj shows a

  A neutral atom always 0/o7utrmi qv4 has

  An atom has more electro/klnel77*4( n v; w +slcnpoc xhep5;ins than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are refj lz*(o; mwqd1erred tomwl(z q1;*djo as

  Materials in which the p elif j hhv(gey7/ go-btc :-8;c-;mielectrons are bound very loosely to the nuclei and can move about v -i(gtc j8e lg /7;:-- pomfy;hheicbfreely within the material are referred to as

  A negatively charged rod is brought 3 d hr5rcogj:r ze55w*near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be chargezr5e wo 3j5g dhr:r*5cd

  Sphere A carries a net positive charge, and sphere B is neutral. z4xca5hjj1/2u rp2hgbn ek2 :They are placed near each other on an insulated table. Sphere B 4jx2ubeacghz1h/ :2k2j pn5ris briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged r)nnzzwg*u. v 6od charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positive8r 4pcj)nul 5ily charged gla8cir5 jl p4un)ss rod. The electroscope

  An originally neutral electroscope is grounded briefly /l tv-k6( kjiswhile a positively charged glass ro s6jilt(- /kvkd is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral eledswuq/ t/h,6dz b73wxctroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it.q ,uwtd6/b /wzxsh3d7 What happens to the leaves?

  A large negatively charged object is placed on an insulated table. d6*gmyxbp ;y 3A 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 ball rolls forward, but does not touch the negative object. At no time does either ball t ;*dp mgb6xy3youch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb cruj1d;(1.f *;k kygpge2 sknconstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distat ie1hd4d f07qnce d. The first charge is larger in magnitude than the sidq fe7 ht401decond charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed nr.s2w can., .h1 myvo,osw/reear each other on an insulated table. Which statement best describes the ew.ca.ym,or v.r/n2,1soeshwlectrostatic force between them?

  Two charged objects attract each other with a certain force. If the c-s kj;clur t(p-9n, rsharges on both objects are doubled with no c ,9lns;sk- cr ujp(r-thange in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forcez45sa/,nb8usor p cf- s of F on each other. If the charges are separated by a distance of d/3, what are tharsp 8o 5ucsn,bf- z/4e new mutual forces?

  Two charged objects attract each other with a force F. What happens to the foqx + zb;wav-fto0ed;byo-+7r rceo+f+q-t;-d0 eybo b 7za;xvwr 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 equal to

  An electron and a proton are separated by a distancezgg 1f2 su -+rei/0: inul:cccu/j d;d of 1.0 m. What happens to the magnitude of the force on the ic+zcu2/ r:cu:d sd/g-g1 nl e fiuj;0proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by :ldg; (fhs ;2sr/valo a distance of 1.0 m. What happens to the mald slv;(r ag/fo: ;2hsgnitude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a protonl;x/ats *7mdb are separated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer t*;t dsxa bml7/o the proton?

  A point charge of +Q is b5i by1nmk1g 2ra,*huplaced 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 2.0 N acts on the positive charge at the square's center. Now, identical charges of -Q are placed at the other three cornn*5bamgy hk21 i ,bu1rers 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 u+qno:9b+hkmp ka7hic0 /t i.the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices u+09 i7c.mkat/nh+ :bqikpoh, 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 one of the other vertices?

  Which of the following tl5)o, ylznb*is not a vector?

  At twice the distance from a point charge, the strength of the electric fi:w wo fj:jiv.3f5 jvw hr1ku*(eld

  Is it possible to have a zero electric fi(--x1iu j;uk gej -jeoeld value between a negative and positive charge alonuue;1 --g-jki j (eojxg the line joining the two charges?

  Is it possible to have a zero electric field value between two positive chary.,i ogp62)c bdxqf*d s4v c3tges along t6fy 4 tqcg3x.s*,2ibdo)v dpche line joining the two charges?

  Electric field lines near z h.)bmqahsu p:yx67.psitive point charges

  The electric field slh zkb+845mv fhown

  Can electric field lines intersect in free spacesy5m0oki2w ) f?

  A solid block of metal in electrostatic88d0cpdp a -kipsv n/(s)f v, (ozi)we equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in )w pop-izsck,(ia(ds8vpn0 )/fe dv8 the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each ;h0sqeg;( jttumv +1 bgiven the same charge, the electric field;mh +gq1jutv b(;t0 se (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a u ahcsy7i;6o. l0 px,jkx)rq 0wniform electric field is directed straight upward. Whatjy qah 6rc,) 70pxil 0;xk.ows can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an e cy5 qjoqfhj7 54 )lksf(:o)msrj7la.lectric charge

  A positive point charge is enclosed in a hollow met azu /u c7lu2m;x8k;/pu +,ormm i,uswallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at awopmau+sicuu;m zu ;7u2 klrm, x//, 8 point directly above the hollow sphere has

State three properties of conductors in static equilibrid:*s651ca.hdd8n* c rr dqjzsum.

State Gauss's law.

  The charge carried by one ecv4jhfrc5e2 *c l :5jzlectron 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 e 9xp50w)e -con/bude wlectrons does this piece o/cn5b)w p x-9eedou0wf plastic have?

  What is the charge on 1 kg of protons?.xe6c8owzd a:

  An atomic nucleus hal; m-t qd6kofa d9ocvb1 5b*p4s a charge 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 valu9k wh4 elf1ml.es of 2.0 and -4.0 mC, respectivl. k94hlf1 ewmely. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, an*:)f qd2+a guswr8 dmtd the force between them is 1.0 N. What is the magnitude of thfg2dr)*8s: wu+am qtde second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How fa5 w+( b:0m3)yyap6iy4c vzqepj airj7r apart are they?

  The force between a tm2ic(dfxffc--r:o bf 1z2g2n q4w4q$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expzo qt6 nqf7n;9ddc:h )erience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric ford6)7qn dq;9z :oncht fce between them?

  Three identical point charges of 2.0 mC 7icb *13 yxwohare placed on the x-axis. The first charge is at the origin, the second to thix co*bw13 7yhe 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 the x-axis. A charge of +2.0 mC is placed a50a7ils56u lst-bngf1t t2 (sf)nlc ot 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 7 fuft nl5)s(0bsti 6s 2n ocg-tl51alacts on the charge at the origin?

  Three point charges are located at the following pow*+ ,(lcpp/p h4ndtx rd r.c5tsitions: Q1 = 2.00 mC at x = 1.00 m;4,pdxtpn( l+wd c*crtrh ./5p Q2 = 3.00 mC at x = 0; Q3 = -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 i;xn:7l*z; szimn oap7s placed at the center of a square, and a second point charge of -Q is placed at the uppzx nn; ls: *oaipmz77;er-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;lo*0mmp hr 0w m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0 mp0l*rom h;w0, 0). What is 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 nC s);a b6xj62ba6lve3t1c so- o-w;navtj p jq. is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5lj 1;;bopbn) xv-v6escwa s32q6ta .t o6j-ja.0 nC charge?

  Three identical charges o11n8sf pyxt:hic 3qjymx6 8 )vf 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the1j nif8xyx:v1t)c msp36 yh q8 charges?

  Consider point charges of +Q and +4Q, which are sez -93,5mp 6dtdyc fhreparated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -,ed 3 zct -h65pf9mrdyQ 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 is ajumu;bvdah71 *z 3/h xt x = 4.0 m. Where on the x-axis can a third charge be placed so the net force ohx1/d;v* j3b hau7u mzn it is zero?

  Charge +2q is placed/81 4bxyd:y eex(v +9yc )gutmfihe9m at the origin and charge -q is placed at x = 2a. Where can a1iy e4/d+eyme9 tfuc(x) yb8xm:9hgv third positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A total oz yk)b hl8c);tf $4.0 \times 10^{12} \; electrons$ 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 ofbmt:2b6nw:7l 6pduy i gravity by the attraction of a fixed proton some distance above it. How far ab p2:ltd nu 66imbb7wy:ove the electron is the proton?

  Two 0.20-g metal spheres are hung from a common poirmp3l vtwo-sx/u7v/p(i 0qa6 nt by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsionwvp6/ i0t( rv/-us ao7mlqpx3 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 of the electrigah) yt,0 vf*q 5cc/bjc field at afv 0cajgqtc 5hy,/b) * distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric57stw c( nr8ew9ud/ky field at a distance of 1.50 m from9w/u yc(5nw8 s 7rektd a 50.0-nC charge?

  A 5.0-C charge is 10 m from i8k v,7ae: rtucxw :0sfn re:b7jo17rq.:hty a small test charge. What is the magnitude of the electric field at the location of the test ch.bu :,: ch7re:j:kt7wqs8f1t 0 r avyn7ero ixarge?

  A 5.0-C charge is 10 m from a small teskrhgo;6ufgc* 4*k cy 4t charge. What is the direction of the electri 6k;ggrfuko*cyh 4c*4c field?

  A 5.0-C charge is 10 m from a small test charge. uuid39 v.t ;34axxgl nrz7*+qk +pc hf What is the magnitude of the force experienced by a 1.0 gnx r33itdz4 cpk hq9 lu;7x+u+v*.fanC charge placed at the location of the test charge?

  Two point charges each 4 vnh6u2ja*wehave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway 2u4aj henwv* 6between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chargn,95iychny4 :-,d o ,jj:,jpzvxpd8ciy ;k uoe is placed at the 50 cm mark. What is the eleyo c8jnzny i ;4x hdvjd9ki yu:c,o, ,j-5:,ppctric field at the 30 cm mark?

  A 5.0-mC charge is placnxd(ecs )n8se, k1( zzed at the 0 cm mark of a meter stick and a -4.0 mC charge is p x(ncs8)1,e zn zsekd(laced 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 an)+u -rcogl +f+cjos3s j+xc,a d -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude )sr, a+ ++j cogofx+c -sljcu3of the electric field at the point midway between them?

  Three 3.0 mC charges are at e kp.stm(+eb9bbr8q; q59*t.zfsye vthe three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC char (m te 5qbr9 b.;.vzeet9qkys*+fbs8pge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges n4u+ npsn0-jj o 87dduare placed at the corners of the squanp7jns+d8 d4u oj0nu -re 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 unifor4 j(pe *nkcx8jm electric field. What is the magnitude of this elpe4cj xk n8j(*ectric field?

  A particle with a charg.3zswb zv k,0we 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 mass 0.120 g is plaodmea 1r38w)cced in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it t meroda83w) c1o be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placede i. b ax-7 )l*b7s9wwioxpfb5 inside a uniform electric field, and is saips-b*)f 7le7.xwwixbb o59uspended 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 b02m0 (t2i5fy2 :mxiggvo src .r;izz+2.0 mC. What is the magnitude of the electric field 5.m xg2m:f0i(czb 02.tov sir5z;giy 2 r0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cmg i f3ys -,e nq6/lfx2o4gaq y+lea.e2 carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sphl6y2+a3.,e 4l ffengq g-eiaxq / yo2sere?