State the law of cons,2o s1na(hf nservation of electric charge.

  Is it possible for two negative charges to atc+mn -a(: wkxiwnt+az 4uba-- tract each other?

  Is it possible for a positive and a negative charge to attract each otpfx4r3o3od u4 her?

  A glass rod is rubbed with a piece of silk. Dhs lnm*a sjgxnv,,)s*+3t: mq6rs rk;uring the process the glass rod acquires a positms k arg st *;jhv,sn,)*: r+ln36xmsqive charge and the silk

  A proton carries a

  The model of the atom shows 248 soyeeqwqq9 y3vf7 a

  A neutral atom always had54m3y, era xbs

  An atom has more electrons than protons. (j7 umqn ;e(rfijexb.x3ed 93 The atom is

  Materials in which the electrons are bound very tigs-v.bppt )kuf w*i 2j1e)9h jihtly to the nuclei are referred toh tv 1eji-ui2)pkp*j.) 9bfws as

  Materials in which the electrons are bound very loosely to the nucj,k ::it k8(;e. irk :vdnysjllei and can move ab;8lyj kv:: d ,iijn( rektk:s.out freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. seddn/z6y,ye9p 6)snThe end of the metal bar farthest fr,e/ nnp66dy y9e sszd)om the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutralnll.yzs6m+r lg,)uq40n u*cx. They are placed near each other on+lx ls. 6zmgn) uqy*l, 4urcn0 an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively c)(s/uz69b j gqmbq6b,f7rqchharged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touche pv2r /u wq,)0 bp5-lrp+oxzxhd with a positively charged glass rod. The w2,r z )h-p0 luq5opb+/rpxxv electroscope

  An originally neutral electroscope is grounded briefly while a positively chav ,* eyct9 d6 *ed4elhhpx--qirged glass rod is held near it. After the glass rod is i4-vd e9ql6,cx*et* e-p dyhh removed, the electroscope

  A positive object touches a neutral electroscope, and the f *hs(wjklv2nsr :cw*j10xp9leaves separate. Then a negative objecfr l:2shc9 * jnpw*jx k1wv0(st is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged objecjas uie;ajo(*(:eua9+ jd8rev1in : lt is placed 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 path followed by the first ball, strikes the first ball, and stops. The first ball rolls forward, but does nouarev(i1 lue (: 8:as eajj*oidn+;9 jt 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 o 9usebb9xlv23 f the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are ssnh, i gzis e701+vzp ;on,+m8gs 6wpdeparated by a distance d. The first charge is larger in magnitude than the second c;n08dg7sz6nv, 1igew+ , + ipohspmszharge.

  Sphere A carries a net charge and sphere B is neutral. k .f99d1) e pyynjq.2fwo)r xiThey are placed near each other on an insulated table. Which statement best describeswk2 .)q f yre99pnx 1iyj)ofd. the electrostatic force between them?

  Two charged objects awvrn 1j w)c0ox:im0 )xttract each other with a certain force. If the charges on both objects are doubled with no cjoxwc0r:)0 wxmn v 1)ihange in separation, the force between them

  Two charges are separated by a distance d and exert mutual attrawv 7*i2w- t tq g no:f44ttq8nzp3o;xactive forces of F on each 4z ax -ont4wvotqtgt7 q;wf:* 2pn8i3other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract*+8qxk g3s4enr vku j0 each other 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?e sg0jr n4q kkx8+3uv* The force is now equal to

  An electron and a proton are sepg,3x jihnypi t8 +)ro6hvd;t1arated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second eg )y d8h13i+ti o6pnrv,t;xhjlectron is placed next to the first electron?

  An electron and a protoybq:e q,ooq70n are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second ele:qqob,q0 7oe yctron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hmbb2ojys /l;jw vk*9v l,//dg 3l:jf-sfo 9nhappens to the size of the force on the proton if the electron is moved 0.50 m clv99hfmlks:/*f j2bd /l os,3jg-o;bj/y wvnloser to the proton?

  A point charge of +Q is placed at the center of-jp,y dv dcc46 l9x1qvob6o 7g a square. When a second point charge of -Q is4-dpqvj ,6bolxy v6 cd9g c1o7 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 center of the square?

  A point charge of +Q is placed at the centroid of ans5i99oqz hr+gy v0 ik ib)3tpwj-: op3 equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an e)kyz-jtg o:0si5pvh9 i3 p+ 3i9bqrwolectrostatic 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 u gb)1,bcbgh- is not a vector?

  At twice the distance8 d- p,yptz9nvq,xc:d from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value bjw 1zf1fuo(kc a0j,o5etween a negative and positive charge al wcj 0u(kf1f 5o1a,jzoong the line joining the two charges?

  Is it possible to have a zero electric field value between two positive charex39 mz fgxs.7q0nsh( ges along the line joining the two char 7z3(g0em.sx hfxs9qnges?

  Electric field lines near psitive point chargesrgib*z(5u5 c p

  The electric field shownh u+alpfh8 l2o.m b*8--zjk ah

  Can electric field lines interwxem/j fpk8,0+blmw jldq2 ;9 sect in free space?

  A solid block of metal in ele bjbq )7;32*kzwynr yyctrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's intey j ryk;b7qwby3)2nz*rior.

  If a solid metal sphere and a hollow metal sphere of eqpsietu ; -(x5fual diameters are each given the same charge, the electric f -estf5 pu(i;xield (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tabl3y -k9yp-ehpmtfg c;9e in a region where a uniform electric field is directcg 9-kpp -h;mty 3fe9yed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an2z5yglyodd cr0g),( t electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grounded r3 ;pkx*0s;mgn yp6go. As compared tk ;0p3 sg*;ynmg 6oxrpo the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors i;:xb z n;ksuy1n static equilibrium.

State Gauss's law.

  The charge carried byo-nwp. afc6 ,rr;rkh ; one electron 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 kuxuw;:9q .ak l05af tthan electrons does this piece of p ;w.qkxkf90tauula 5:lastic have?

  What is the charge on 1 kg of protons?0 zq j (z(b6rmy9bah(r6 aiom-

  An atomic nucleus has v)/xudr- zd0h a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sepv ese0ji7 /ygwp0q+2w l 8eg+larated by 1.5 cm, have charge values of 2.0 and -4.0 mC, rwq/g+7+0egw8 0vjl i 2s eylpeespectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, i.7nuz2 m rdq .1e. z9nnw8opdand the force between them is 1.0 N. What is the magnitude of the se 79dm...nwro zzenn8 di21qupcond charge?

  Two 1.0-C charges hav uqp+*nus+)b y7ni f;he a force between them of 1.0 N. How far apart are they?

  The force between a z67zpo /n(;4 uaxq 0 1ekcld-pqndr/z $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If they oygdq537kb(j-p n;2q rzwqr;are moved to a new separation of5drbw; 7;kgoyq-r zqqp 3n2j( 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mg molu;rbo61djd c:c0u637c* yf-y tpl2acb +C are 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. What are the magnitude and direction of the electrostatic force which acts on the charge- 6 lco1j72b6dm;c:a0pyltc cf3 u+yubd*o gr at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is ppw z+bayyrog 2hcf8;g,f7m 1,laced 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 on1 f azm2;g fop,8y7+ w,ygrbhc the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at x 9; (uhoic4pylyzu/xb oq bpg7 (u9.f7= 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m. What is the magnitud;y(b 7(pf gx q7uz.iyu 4/oo9p9ucblhe of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, andl 1q/vm (*7+gthauoso+3vj 3rf 9hl zl 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 mv+3h lul zq avh*g/ stlj+1mr3fo9(o7agnitude 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 = 5.0 nC i*kw *mx (l:afes at (0, 0). What is the mal* fkm ae*w(x:gnitude of the 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 nC is at m vpuw0*gh u 4mat7sgvg90x-; (0, 0). What is the direction of the net forcg7h-twu0u;vvas9g0p mg*x m4e on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertis, 6yyht9u qh-ces of an equilateral triangle which measures 30 cm on yhh u9sy,tq6- a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, y.y-zi k lfnf51we/ ):)xfme vwhich are separated by 3.0 m. At what point, on a line between the two charges, would it be possibl-)).1 y fewl m:iffe/zn5yxk ve 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 angz:i5nh(* z w(6jfh cpvheg5lw o,l*wo+p 6q2d a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the negj g olqz66:5*peo*fwnv+c(ww h5h(2pl,z iht force on it is zero?

  Charge +2q is placed at the origin and chqj/mh8hey 8y(fmjt 3 h/r3,hrarge -q is placed at x = 2a. Where can a third positive charge +q be placed so that 8j,hymq/(y mt h/hf3j83rerhthe force on it is zero?

  A copper penny has a mass of 3.0 g. A total 2+s 3msdu*s pzy. 7dnmr2zuy2of $4.0 \times 10^{12} \; electrons$ 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:0 .rdk7su 5c*lrgay 2e+wg up the force of gravity by the attraction of a fixed proton some distance above it. How f7y* u:gwc0 +ugkl5s dar2r.pe ar above the electron is the proton?

  Two 0.20-g metal spheres are ha gd6gk7j s;4tung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrost7a jd;tgsk46g atic 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 +k..q6/bnpgf c i 85jlf40e. What is the magnitude of the electric field at a distance of 1.0 m fro6fclg/.f8 p jq5i.b nkm the nucleus?

  What are the magnitude and direction of the electric fiel 2v+t;0j+j-uoejkzk hc-p9 wmd at a distance of 1.50 m from a 50.h outjm; k+2w-9cvkjj -+pz 0e0-nC charge?

  A 5.0-C charge is 10 m from a sm aumz6vr;o-b9 nfvn4 yk*n e*1all test charge. What is the magnitude of the electric field at the location-o9mf nn ; kyavzre*v6n4bu1* of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the dpi:3 z50ai 4 4xf)fn4 lhpszjrirection of the electrich )xj4p5 n srplz:a3i fi0z4f4 field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudfl*/l4 jgnnf zn(/t8re of the force experienced by a 1.0 nC charge placed at the locarn/ tfl g(8nfz4j/* nltion of the test charge?

  Two point charges each havexn:4s.il;3 h0pj jfb f a value of 3.0 C and are separated by a distance of 4.0 m. Wh xp0bjj3ih:fns.;l 4fat 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 -4.0hqbg8, x+.xkr mC charge irqb8x gk, +.xhs 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 mark of a meter stick and a -4.0 mC8wxojck32 n2py m/1ib charge is cxn18yjk2 / w23iobmp placed 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 1+l ut// rgv7aebcn. g-7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway bete+g l/1ntc/arg7ub. vween them?

  Three 3.0 mC charges are at the three corners of a square of side gjkx-hvrv3 khw6tfb368: gni0:nwm30.50 m. The last corner is occupied by a -3.0 mC charge. Find the electricbkntrxvn8 f3mhv:kw60g wh3:ig6j 3 - field at the center of the square.

  Consider a square which is 1.0 mh; r 3ju-fl) 9qq7axjd on a side. Charges are placed at the corners of the squah7q9f-r ux ldj;ja3)qre 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 unifohy ls.) zegy0)zw617y0yv drirm electric field. What is the magnitudezl00vz1)y6y i7 gew rs.h)yyd of this electric field?

  A particle with a charge hrs*6 y-4 dqybj 5m g4bho*+rwof 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 placed in an electric field of 1e :mf.9p3t1 hnhfp kf6000 N/C pointing downward. What chhfn 3phf.f9 mtk:11 pearge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries amcd gmv;--8d+p)i9 ql kq miq3 charge of -2.00 nC. The ball is placed inside a uniform electric fieldimg3;q -v89idqlm)-mkdc q p+, 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 a3n dln()4.nznvggh9 n0o;cc. What is the magnitude of thn(ng)0azgl 9 c;o.dcn3 nnv4he electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm cgx-6-j r+a fzbeo j-0larries a charge of 3.0 mC. What is the electric field 6.z 6 +jlg-e-a0bjfr-xo0 cm from the center of the sphere?