State the law of conservation of electric charg 7 ,3qzow:eezfe.

  Is it possible for two negative charges ;uwaqz dqv0o.t22fl; to attract each other?

  Is it possible for a positive and a negative charge to atthk 6qvm7j2. r/oz-w7uzatdb5 ract each other?

  A glass rod is rubbed with a piece of silk. During 2n0g 0ec.jnub+vpqh8the process the glass rod acqu bu8+0jpqnn0cge.2vhires a positive charge and the silk

  A proton carries a

  The model of the atom sho59fzdm5(.rmwo bhed *l mx3v,qn k:x8ws a

  A neutral atom alway8qm8tgftlz9y 8h1w 3 vdb;ty7s has

  An atom has more electrons than protofs;ai2czzn+ b1.nmf e-*l,ax wrm1s,ns. The atom is

  Materials in which the electrons are bound very tightly to the n7vzfjr5 s0idpr 1:dfo h8et 51uclei are referred t o7e15ihrpsvfjzt5f:8 0 1 drdo as

  Materials in which the electrc*jtdk+a3 m;rons are bound very loosely to the nuclei and can move about freely within the material are referredtrm 3;a*jdck+ to as

  A negatively charged rod is brought near one end of an uncharu8x *cwojxw*px4c8uu 3v6y e -ged metal bar. The end of txxe ouu84c 3x 6u*cwvy8p*w-jhe metal bar farthest from the charged rod will be charged

  Sphere A carries a net positiv t+ /pp 2eolpf,xu;vh7e charge, and sphere B is neutral. They are placed near each other on an insulated table; 7upxtpholpv f+e, /2. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod cm vl66qkpv) t-harge an electroscope positively?

  An originally neutral electroscope is briefly touched wija0y,t 75ano zth a positively charged glass rod. The eo7atnj a,5yz0lectroscope

  An originally neutral electroscope is grounded briefly while a positively charge okq )bj+t1xj(d glass rod is held near it. After the glass rod is removed, the elk)1j(j+t qbx oectroscope

  A positive object touches b3wia4g n3vt2a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, btnw3b43 va 2giut does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neut6 lhl/ev bh8.v1 h.y dz0hv0oclsen4.ral 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 balzc6 v. /hdhl1.holv8b0 s 4vhn.eely0 l, 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 consn dc 449i(nlottant $k$, which appears in Coulomb's law?

  Two charged objects arxfm/ppt3/ 3ya/wlpr hn/z ) p6e separated by a distance d. The first charge is larger in magnitude than the seco3zp)/n3 yh6w atpp/pl/fm /r xnd charge.

  Sphere A carries a net charge and +ir )pu0um83u 3paywhsphere B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrost u 3p y0h+iupw)3a8muratic force between them?

  Two charged objects attract each other with a certaj6 ptdrus.*je x+f im32e2yn8in force. If the charges on both objects are doubled with no te+2f 26.rudej8i 3yx mjpn *schange in separation, the force between them

  Two charges are separated by a distance d and exert mutual atm76g q w9 9n4)bxtlim9kqj0 rntractive forces of F on each other. If the charges are separated b07n i9j) tnl q4bqmg96wxm9r ky a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force 2pza-;s4iyyw pm v qv-by )i8m:sw -h7F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the mivvyam- z28ph y 4:w-s)sb;7wi-y qpseparation 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 by5 uz/ojgoow -, a distance of 1.0 m. What happens to the magnitude of the fo-owoo ,jz /5gurce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance obxqxe*h .p)j6u iy8:xf 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the puq*yp8x e.hj x6xi:b)roton?

  An electron and a proton are separated w+m ,juru+g560z5 dtz b )bahtby a distance of 1.0 m. What happens to the size of the force on the proton if the e z 5am0zdh5+ rt,tju6bw)gu+ blectron 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 point x5)+mtry 2hqlk78e ehcharge 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 the ertel+kh5yx2 )m8h7q center of the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle. Wher6 (8dy5k; zr-jkmgy an a second charge of +Q iy r(dzr85y mak-;kj g6s 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 placed at one of the other vertices?

  Which of the followin( hq nx9vj6np(4-ec czed)y l9g is not a vector?

  At twice the distance from a point charge, ths (d*e)d0gh 85ff8uxxi1u8dzt hwkf + e strength of the electric field

  Is it possible to have a zero eloy1y oq9+yepw89e5y9iin g2 hectric field value between a negative and positive charge along the line joining tgih wy9oe9qpyyn9 5 81eio2y+he two charges?

  Is it possible to have a zero electric field value between two posc5 i6oil72vbhd3yts3p09v jp itive charges along jihvct75 2 v 9306 siopd3pylbthe line joining the two charges?

  Electric field lines near pjb9jccmz8c5 5xzy 2e./4t z ufsitive point charges

  The electric field showni edq 5fev6.s*t +3tm3v t c1wvun1u+f

  Can electric field lines intersect in free spacehr ty.6m9dqc+s:st/e ?

  A solid block of metal in electrostatic equilibrium is pl)/vcx/la5 o jofb45ao aced in a uniform electx voco5/bfoj a54/l)aric field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere ow/( pnfo*qut4f equal diameters are each given the same charge, the electric field (E) midway between the center and the q nofu*4p t/w(surface is

  A cubic block of aluminum rests on a wooden table in66quo(jr6 cgl a region where a uniform electric field6 g 6ucj(qorl6 is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostaticv3lm p((tk y/y i,c4ai equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metdh*z pzk 9v8h,allic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hol,zz dp9*8vh khlow sphere has

State three properties of conductors in statn 3)j(roj0 ixh rgy*0nic equilibrium.

State Gauss's law.

  The charge carried by one x /.lwlqf(2dtelectron 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 thal,m( gi1vj s-dn electrons does -sjgv, 1mi(l dthis piece of plastic have?

  What is the charge on 1 kg oo d50aa-yzd(m,m-ihbg)vg0g swo1, i f protons?

  An atomic nucleus has a charav0 qj 5j2sbz y,i89ymge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1nx, mw hpts-qa-.7p ;rfv.ou(.5 cm, have charge values of 2.0 and -4.0 mC, respmpfo.-;ru7 t(a-p ,x.qsnv whectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a sud8j*)miicmo . 4 g8q kn;v1bwecond charge, and the force between them is 1.0 N. What is the magnitude of the second chaog1mw*v ). uq 4icjb8 kn;d8mirge?

  Two 1.0-C charges have a force between them of 1.0 N. Hox( g;gkd; v/dbw far apart are they?

  The force between a )ck 9y,mjm a;pz6*jmb$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, in,x1,a nox qjf/ a 3p*+wcvjorw5w7zj*itially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between the 1/xxozaj3jrj7v*nwa +w 5w o,,p fcq*m?

  Three identical point charges of 2.0 mC are placeds kn vf71-kaihp2g2d( on the x-axis. The first charge is at the origin, the second tonikf2( vs7a2dpghk1- 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 ,gda mem8/tx5k -yrfpk-)+0 ezp6mqh the x-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 onp m-a8ek g6kf5edqm,) ryhtmx + 0-z/p the charge at the origin?

  Three point charges are located a uaxak1xr,nh q:9-.f bt the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at .qkf1b xu xan:,ahr-9x = -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 second point cha v 9z(j.ke mug3d:zl(drge of -Q kzg:md (e39.d luv(z jis 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-left corner?

  Q1 = 6.0 nC is at (0.30 *w q +rw9ke9.pduyksj o52kg0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the ueo2d9 gpsrqk +wk*09 wk5j. ynet force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, n7ja26nm(zx n 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 56njzn( n 7max2.0 nC charge?

  Three identical charges of 3.0 mC are placjdd*98d4qrz t ebo 1a9ed at the vertices of an equilateral triangle which measures 30 cjdrq 9ad9o8de 14z* btm on 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, which are separated 3yegtw wh;v 48by 3.0 m. At what point, on a line between ;vy3wew8t h g4the 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 = 4.0 m. Whekl q ha3zzo**w kc3ew*pea,l sq-4; m:re on the la3cam4*;kq: 3wehpe lzwoz kq,s**- x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the p;,ghe nn/) ax, gtvzt8u:dyx9af m,*origin and charge -q is placed at x = 2a. Where can a third positive chaux*aay gn ,fg)e:t8p,d thn/ ;x 9,zvmrge +q be placed so that the force on it is zero?

  A copper penny has a nh :6whc7 1ey0thyg5p mass 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 of8/8jw,2mb (t oa ocuih a fixed proton some distance above it. How far above the electron 2 ba(,c 8it/howjmo u8is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threadsnt j6iz 0l( gcyea1x. j5*zx(e which are 30 cm long. Both are given identical charges, and the electrostatic repulsion.50i1ac zgy6xt* nx( elzejj( 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 chotr j*,wbxojm :6b hsyc m323e3)j n 9ryp-2fdarge of +40e. What is the magnitude of the electric field at a distance of 1.0 m from 2ow9fr2o6d3y h3:,jmr3sntp bc mj e)*jb-xy the nucleus?

  What are the magnitudelteiau ymnt47, i,b .7 and direction of the electric field at a distance of 1.50 m from a 50.0-nC c47yma., enibt,7ltu i harge?

  A 5.0-C charge is 10 m from a small v*/ , yk ayvbvr7gm*pzo/q84l test charge. What is the magnitude of the electric m4* ok7v vb,*/ /qyypvazg rl8field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of t1v 2:wv8tto-i/qk6gj w9b5mwl 2,yssc7z jfhhe elecisw/f6kht8ot:qv12v-z j jy 9g l scb,m2 7ww5tric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o q8g0ux q,g9vgyuk(2kq, nli:f the force experienced by a 1.0 nC charge placed at the location of the test chnqgq:ugv 9kl,,g xqyu8(i2 k0arge?

  Two point charges each have a value of 3.0 C and are separated by a disxp49rxa6n kg7lmrc+ : tance of 4.9 4+gxmrl7k6xcpan: r0 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 py t;ln2wxv 3xz :fw-4meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 x3n ; y-4lvzxpwfwt :2cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a +j.nbs f/vtab t-is) 1-4.0 mC charge is placed at the 50 cm mark. At whattajfs)/ snb+-tvb. i1 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 x = 0 n jl,b1uan;s ,and x = 0.20 m. What is the mag,l1n asbu,n; jnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three cortv c9 ;lqajxupb 4:4zh ;(5uhrners of a square of side 0.50 m. The last corner is ;l44pzh5xtu (cuj ;rv:9b qahoccupied 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 side. Charges are placed -*ds-zsx4p2j bknhe;at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 me;n24pszs- b -d j*xkhC 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 placedi1laqi64,p/f6pbw a2n k ;z zo in a uniform electric field. What is the magnitude of p kbwifoa 26iq4 ,;aznlpz/61this electric field?

  A particle with a charge of 4.0spr . 1 ckuv-kgl2u)c-zh15lj1ep9 fb 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 ytk3 1ds,z. tv6000 N/C pointing downward. What chadvs,k. ty31tz rge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. w 5bzfu11d8f , zi,ubw The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of thed51,f u1bb8i zfz w,uw electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC.7onto10s2s6.jk ra uu What is the magnitude of the electric fieldtko6r7s2 . 0u1 juoasn 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the ele62i w j8fb/mh- qou l9xsob.,sctric field 6.0 cm from the center of theum fo-sq 9.is8,h 6wjo2/lbxb sphere?