State the law of conservation of electric cha)y:4flsn( d9xfrnuoly e013f rge.

  Is it possible for two negative charges to attractq: ymfx0gry -7 each other?

  Is it possible for a positive and a negative charz fgny0k(g g;n;)nis 2ge to attract each other?

  A glass rod is rubbed withv6 t ;d0i,hoavda9b,x a piece of silk. During the process the glass rod acquires a positive charge and the silkda,od v tv6b,x 9i;0ah

  A proton carries a

  The model of the atom shows a5l/kp(5 uucz 5fcb 1rw

  A neutral atom always j l,q0bnry*1 xfm6)4nvd rho)has

  An atom has more electrons thanm/ pzlltyjcax(c -,. . protons. The atom is

  Materials in which the electrons are bound vey/ k4sakc9 i7vje0 t8nry tightly to the nuclei are referred t ye40ca8jsnv9k 7/ki to as

  Materials in which the electrons a2xgpf.-q v u3yl)n2w8utx4j ire bound very loosely to the nuclei and can move abvy.i 2j-84utqupn2lwx )gf3xout freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bar. p9f/y e:tz 9giThe end of the metal bar farthest from the charged rod will be chati9:9fpey gz /rged

  Sphere A carries a net positive charge, and sphere B is ngnrh 5z w:a1+k57yejf eutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statemfynj +7zh5rw ae:k15g ent is correct?

  How can a negatively czx2.sy99ddq d/7pfxca j f:5oharged rod charge an electroscope positively?

  An originally neutral.eff33 qa9zh9y v 7ell electroscope is briefly touched with a positively charged gq9 .y7ef93hv fellz a3lass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively chargeow+s gf o((hat2 mh+m.:f5gxvd glass rod is h:fs (g (o 5h2h.gamwmox+v tf+eld near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. qg ;f.5f(bd (qmrcf8uwz; +na Then a negative object is brought near the electroscope, but does not touch it. rdqfaffqg.nm+z;cu (( w ; 8b5 What happens to the leaves?

  A large negatively charged object is placed on an insuo (;+cnm brrj*lated 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 foll ;jo(* bnrcrm+owed 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 ga-t)3twk, l+tq x7gp Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a de;;jz tj)sbi7 h7m a8tistance d. The first charge is larger in magnijz7)7ts;b 8meht ija;tude than the second charge.

  Sphere A carries a net charge and sphere B is neuh-+jm; (;k gwl+pokkx hm:w p3tral. They are placed near each other on an insulated table. W(j3+kmw;wk+xhph- k p;g:mo l hich statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges o3pe:hym.oi1xr p 7l8 zn both objects are doubled with no change in separatio7lrhp1 o3emzipx y:8.n, the force between them

  Two charges are separated by a distance d and exert mutual attrnp9dwex:lcp4txbo;30fp.b )gz6 ol . active forces of F on eal ;pb o3fx4 e9od).cz0nl wxb:p.p6tgch other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a forl(8z10rhan+ l pfmoa1d x19 ohce F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation ao1x al8l0 dmnhpr h(f+1z91odistance 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 distancewxo ss p;p4j/g lus4g11u*i*c of 1.0 m. What happens to thc op s*4 slg iw1su4xup*;1j/ge magnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dist5pdg/k (rqi1*0wbctdbd39ay ance of 1.0 m. What happens to the magnirt5* w cdg3d9p0(kabi/yb1dqtude of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens to 7 wrzawtwi*.k;;k;a2-nj kvz: y a7wb the size of the force on the proton if aa7wyrk;n;:tv iak.z2k*wj 7wb-; z w the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the centejrcd/ tx4r ,4nr 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 corners of the square. What is the magnitude of the net electrostatic force acting on the positive charge at thern,jcr/t4 d4x center of the square?

  A point charge of +Q is placed at the centroid of an equilaty 0j -bgms).,l5admk*+ y.ecibi2qs b eral 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 the force that acts on y 0ibms ,)mie- gad2s* .y.5bcbqklj+the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the followinci h3x:4ve 6*cgqerc3wnzfh. .q6q*kg is not a vector?

  At twice the distance from a point charge,q:2smnr5sqwz v0y c;7jx+ 0lw the strength of the electric field

  Is it possible to have a zero electric field value between a negative and posqa*a9s;c9/v iz ox7 cjitive charge along the line joining the tw*s9 cx; 9vz7qc/o aajio charges?

  Is it possible to have a zero electric field value between two positive charges5qln6yto;z q-8czy v1 along the line joining the two chargyc z65ql8-znvy ;tqo1es?

  Electric field lines near psiw19:a5 tordeus*sj: 9frcq k)tive point charges

  The electric field shouv) nk)*vy;u cwn

  Can electric field lines inteiu/w ja8hzec r(g0f;2o8gf1 hrsect in free space?

  A solid block of metal in electrostatic equilibrium is place 5;jir8xl(k;ztgmbfa h2 wrodj d +4b b+r.7a1d in a uniform electric field. Give a statemenj af.h;ogb7d+( 5bx ikb +d zmt8jrr1r2a4w ;lt concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diame1d wpz ivo+pbi1(3g/e ters are each gi(1gwob3pp1+ev /dz iiven the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a regio;bpvmya px3 5;n where a uniform electric field is directed straighm ;appyx3b;5 vt upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibriuvfiquy* 1o, k d/qm6+nm near an electric charge

  A positive point charge ii* hb 4 ;w,uwl ocvxhn/gxr0/, z/qyfnh ef696s enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow we6n4n /6 fhf hhb0/, i c rx;ug*wy/,v9lxqozsphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in stat1hn 1 0iro-:w9.:qe(i n0mm tg demgksic equilibrium.

State Gauss's law.

  The charge carried by one elu iqh-a4)hmvr 3c9 *blectron 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 + n6t1tuwn 1zxnle+q/ :2.00 mC. How many more protons than electrons does this p l16 zwtq unxn/t+1:eniece of plastic have?

  What is the charge on 1 kg of proyl*wt*ov a d+ ,1aqcg,tons?

  An atomic nucleus has a charge of xq, 3werpl on)bn 3bwy0lfq7*c 4f1a1$+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.5 cm, s-n3y2qwtvs x mfdk56)*0nbmhave charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between them?v y6wdmb mf) sns-*05t32qx kn

  A 1.0-C charge is 15 m f -*nnq 5sc )/ntfnyb0from a second charge, and the force between them is 1.0 N. What is theq /s n-5cy)nn*fbfn0t magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.s:l:uo glpic+)x0 jw* 7 vi5qr0 N. How far apart are they?

  The force between a d2f) 6irhs,)qxg a a8o$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm am*b2tk5.*nxc kuj2m spart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between thenm2k c. sx*25mtj buk*m?

  Three identical point c(aie3a5 hep,,qgyn p 8l 9(azcharges of 2.0 mC are placed on the x-axis. The first charge is at lape ,5,g(q z8ic3ya(9ha n pethe 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 at the origin?

  Three point charges are placed on the x-axis. q q, tiej q-aus;ein3y-qb/ ./ A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4baj; /i eey s-qn/ iqquq3.,t-.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 3ih /-czbdch/vr-8 qgthe following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = b/vc h r-g8-q3/hzidc 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 is placed at the center of a square, and a secko:j2 j4jn * :cseiss2ond 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 third charge of -Q is placed at the lower-lefti:s*j4: s2eo 2scknjj corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10xe5pi6mhhh unv-e*/g ene +:( m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 hmph/ie-neg eh:xu5+en 6 v*( nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (fxa3/v 5-iex nm3(bdy 0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the mb d3 eyax(v3xfni/-5direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices t zkjsz9-daaz8e5p/ kx9 z -4lof an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the chzke8j ta-4/d-kzx9 p9zs 5lza arges?

  Consider point charges of +Q a)yl rv;ymt67gnd +4Q, which are separated by 3.0 m. At what point, on a line betwe6;t)l7 ygm yrven 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 the origin and a +9.0-C charge is at x as q,k gy1pp/(= 4.0 m. Where on the x-axis can a third charge be placed so the 1kpaps/ qg,(y net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2,zumqlmu/ 39 za. Where can a third positive chuu /3qmz 9,zmlarge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. ei z /+l6uzdbgxti)3* 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 fix94pe:ftfg m 2riyu0i6 ed proton some distance above it. How far a:e tf 2ip6muf9giry4 0bove the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads w zg p*equrwt+m;qb-b; 4+d uc:hich are 30 cm long. Both are given identiu+ r+g*e;:q4c;wpz- bubdm tqcal 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 h.g;ka+ ylue4e rd.o)eja5o5charge of +40e. What is the magnitude of the electric field at ey.5k 5.e+agle;oru) d4 a joha distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the ela32hfa t )roi5k, jmvfw,dp6,ectric field at a distance of 1.50 m from a 50.0-nC charge fkia 5h ,toj wvmar3dp),2f6,?

  A 5.0-C charge is 10 m from a small test charge. What is the magnxdmc*rz 6/l )uh u:bj2itude of the electric field at the location ofuubzrl:62 ) xjdc h*m/ the test charge?

  A 5.0-C charge is 10 m from a small test chargfv e(z1n +n,nbe. What is the direction of the elevnn(1 +e nbz,fctric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnithv,b q(e,tj+pvpr:s6m g6 -qhude of the force experienced by a 1.0 nC charge placed at 6e (hhqbj-q:,v rp t6spgvm, +the location of the test charge?

  Two point charges eachl 74x-x2ev-urglv kqa6ti/lv yi : b61 have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric fieldk v2l -avli47 u1x/xtvgr6ql:yb ie6- at a point midway between the two charges?

  A 5.0-mC charge is placed aaj6mwgi zu;f1x .u3,a t the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the. fjwm3u;g6az i xau,1 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 stickwu98ecn0n-*p) yzds m8qp:rm and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two sp q rwmm8*z 8e9p:yn0u-dn )ccharges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed atl9h/h6 yar7xyjpqn ; y*1 mt3j x = 0 and x = 0.20 m. What is tjln*1yh7 jth m3/p 96yxa;yr qhe magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squ, raey de2-8ue 52itplare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field ait- 2dl eyep5u,re82at the center of the square.

  Consider a square which is 1.0 m on zi.5;aap +exko dp6a, 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 6ai ,p;o5 pze.akdx +amC 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 5.0xb4 a/ ;iqoe9(godw1m mC when it is placed in a uniform electric field. What iobao;4egmdwi/ x1 q( 9s the magnitude of this electric field?

  A particle with a charge of 4.0 mC hasvz k93 6+evjuphi)n-+ber (sf 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 x h+9.shiewu2 of 6000 N/C pointing downward. What charge must be placed on th .uhwexh9is 2+e ball for it to be suspended?

  A foam ball of mass 0.150ngpg2*h-b h1 oqq / lm iv(34ar/khk,yz7omq+ g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric +li bn/qk 3zhma 4op*mok/ qvg1h2y-r7h ,g(qfield?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. Wh xib-ot:3gl (d)/ord )x lqvt6u.k*ktat is the magnitude of the electric field 5:)kud(k ro/tvqld-x)bxl 6.*3 tto i g.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What cik9h9:ode*o is the electric field 6.0 cm from the k9odoc he:*9i center of the sphere?