State the law of conservation of electqa0,d+mk :a jiric charge.

  Is it possible for two negative charges togmuj4;i px;+g attract each other?

  Is it possible for a positive and a negative charge to attract eachfnbb h 4r*:yy2fy oy1, other?

  A glass rod is rubbed with a piece of silk. During the 2wi2b 1fc s62phaiofl b5:(h jprocess the glass rod acquires a positive charge and s 22jpfhbc5 1: iibo w(2hlaf6the silk

  A proton carries a

  The model of the atom shows m.nk raf w5ghrrzg ,,)ak.+v5a

  A neutral atom always hcj( qbf,q7+jfb rq)x,as

  An atom has more electrons than pt*2mn yky1bt l1lt5n*rotons. The atom is

  Materials in which the electrons are bound very tightly to the nucl a;;yzic0k* (akusfuk 7)ni0 sei are referred toa; zyik0s ns);(iu70ck*ufk a as

  Materials in which the electrons are bound very loosely to the nuclei and )py2h3 wk4c racan move about fre4h wrkp)3yca2 ely within the material are referred to as

  A negatively charged rod is brought near onekqy4x.n3cfvx3bn ne s2hgjm3 1 6gb8)gsnt11 end of an uncharged metal bar. The end of the metal bar farthest from the charged rod w qbxkfgy e)h143bvg sng.8 n63x2113n mntcj sill be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Thgie4 wf sy b ne/(7p*2aq;)qkney are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. ;nkfi n )(bse4ae*pw7/2q y gq Which statement is correct?

  How can a negatively charged rod charb* s v6y1yzh3wz4no* c5gwmn*ge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chail4jzhyq 0(g*rged hj(gi04*lyq z glass rod. The electroscope

  An originally neutral electroscope is grounded briefly while -fr 9yn g-uqe lpa5rob.aj9i8c7 t; 1kpi y61oa positively charged glass ro iy1-o9 ;a9j.e8lro1cb5k-7pgiya np utfr q6d is held near it. After the glass rod is removed, the electroscope

  A positive object touches a szhp;wjl(70jneutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it.0h;j7 szp(l wj What happens to the leaves?

  A large negatively charged obje;e7 6ca+kgc-qmvo 1qyct is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but st61cgaq+e7vmk- cy qo ;ops 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 touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coul 2k8 fywe(.jslomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a l8 6veijtt7w9distance d. The first charge is larger in magnitude than the second charg6j9t e8tw7il ve.

  Sphere A carries a net charge and spherfhisds o ; 2-q5-tcmk rx-kfb69f9s2pe B is neutral. They are placed near each other on an insulated table. Which statement best describes the electrosta ropfdshcf2;5smkf ibk96x --t-s 2q9tic force between them?

  Two charged objects attract each other with a certain forceg l: 6h+y8f5e1ltcqlk. If the charges on both objects are doubled with no change in tkfyllhgec1+5:l6 8q separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forceswo xilj9 pz5;b) c-fa5 of F on each other. If the charges are separated by a distance of d/3, what arep5z)i j- l;wf9c5abx o the new mutual forces?

  Two charged objects attract each other with a force F. What happens tk+jdnj8azr-::vfm a39 e1hj(:wubck rbh(g 8o the force between them if one charge is doubled, the other charge is tripled, and th(j1h:8az c grf+ 8jk k:dhb9a-:eunv 3 rm(wbje 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 bd0sh 2wu; ,5so5hxz7k4edfxdistance of 1.0 m. What happens to the ma5, ;2hhbd7u4zsw eo5 fxdxsk0gnitude 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 distance of 1.0 m. What happens tkqdy;e y.2ff bo.x+odc;ks 8+o the magnitude of the force on the first electron if a second electron is 8cs;kf.d q;.+xoeo k 2b+dyfy placed next to the proton?

  An electron and a proton ar3x t6zk 7,-fpd f 6wr9 h5ks8mwy hyb3gnd(o3le 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 to the pwy9(375bf k pdg w lhh38r6,6 mknz3ydx-f ostroton?

  A point charge of +Q is placed at t17v pow *dhs6yhe 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 corners of the square. What is the magnitude of the net electrostatic force acting on the positive charge at the center of t16y *dopwsv7h he square?

  A point charge of +Q is placed at the centroid of an equrulb, r8xlw41 ilateral 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 ther,rl 8ux14wlb 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 4):c/mjpzi7 d4rag gbg is not a vector?

  At twice the distance from a point charge, the strength of theg4hsh2atqgsc38vi; + electric field

  Is it possible to have a 7wif-wo+)k f+c5b/ a paz-f be-+amouzero electric field value between a negative and positive charge aw/+ +am-oab 5i7 fub-o-z wf ac+pfek)long the line joining the two charges?

  Is it possible to havdity/c9f),n s e a zero electric field value between two positive charges along the line joining the two charge tfid n9c)sy/,s?

  Electric field lines near psik5b 7f g )bb:fth4*v9je+mk krtive point charges

  The electric field shown .rgk8z( c* *ns 6imhcm,bd ge1

  Can electric field lines intersect i8 4 3m(xzn8i wr;osman5duxi) 2qv/p )pb0tprn free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform electx;s9w/l 1 tuibqtue+-. xiw*c ric field. Givtixu1 x9+c ;s /elub.q-ww*ite a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal: v-k -uo/xoj-own /yh sphere of equal diameters are each given the same charge, the electric field (E) midwayxjoh w--/o:-nv/ ok yu between the center and the surface is

  A cubic block of aluminum rests onafv -m,tzv6h6 a wooden table in a region where a uniform electric field is directed straight upward. What can be saifa,v 6zm ht-6vd concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electrzhh(+fq;9k6 q3 o wnrus((hsm ic charge

  A positive point cha5i wk:/u9j3f/ qmxmq crge is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point dirx jqk 3:i5mcu mwfq9//ectly above the hollow sphere has

State three properties of conductors in static equilibr5iyu+ ; d*.aexgwa/ue ium.

State Gauss's law.

  The charge carried by otcwj4-xs 6g 7jne 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 +2.0 55a 2+pwowix28ppqzcnz6+ vp0 mC. How many more protons than electrons does 5wq+2pai6 +pc2ppwzzvo 8 5nx this piece of plastic have?

  What is the charge on 1 kg of prjduw0. fh3ry i8 a)/hdotons?

  An atomic nucleus has a cf5k,nf5+k jlvdh b8-p harge 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 ano3k(,bmm3esu. w vzl9uo(w :dd -4.0 mC, respectively. What is the magnitude of the electric force betwe(eo ob(uz:d m lsmuk,. 3w3w9ven them?

  A 1.0-C charge is 15 m1nz9fi ju hg-) from a second charge, and the force between them is 1.0 N. What is the magnitude of the second chj1 h)figz u9n-arge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apar wu s c7k07+gpeyras;5t are they?

  The force between a 3tjk 98 enez9,mwyp0 m$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initqwok;se5v 0,qv wm)hp3c w .,kially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 kcevw ),qmposh0,wv;qw.3 5kcm, what is the electric force between them?

  Three identical point charges of 2.0mw: 4-dvyw:js wcf001y5nvxa mC are placed on the x-axis. The first charge i1 jymwxvf- s4y:n0dwwv5a0c:s 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 at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed at lb v.*94k ,a9c6p nqzdwrt dt1the 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 electrostaticw16ca9d* q . zptrn,lv9t4dkb force which acts on the charge at the origin?

  Three point charges are located a i 0- 0t5afvntyj,bgf*t the following 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. i, byf tj0n0v5f*at -gWhat is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the cent3+ ionei,lt(6vqj ogw2 -v*leer of a square, and 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. Whanol iq- ti6 j2(,ewvv3og+*let 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 = -1.0 nC is at (0, 0.10 m)yna n w)p2qe58; Q3 = 5.0 nC is at (0, 0). What is the magnitude of thq2ne)5np8 ay we 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); Qp4 djkv na1y8emts; 2u3 tu,v-3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC cha2 t -au14u3,vpnmtej ;8ydvk srge?

  Three identical charges of 3.0 mwzm/fd9dfmhp./ a+ w/C are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatfhaw /mzfpd.9w+m/ d/ic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which artp/u yb78eh b*e separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting o/e* 7hbu tpb8yn it would be zero?

  A +3.0-C charge is aar3cqtufq hn1- 4w-e)t the origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is qqa)f 1t -h34neucw- rzero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. b hywq.95qzvq-s; 9+jlfybrb**cm 1y Where can a third positive charge +q be placed so thaqr9j vmzq l*w*fy95hby +q;c1.b yb s-t the force on it is zero?

  A copper penny has avtfpi5: qqk7 * 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 gravityamofa s8u42x4 +rz(3og q0pxa by the attraction of a fixed proton some dizqs f ap243m gu0or +4xa(xoa8stance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a cow.1e3mf.c 1z pclcwl gl y3/k*mmon point by nonconducting threads which are 30 cm long. Both are given idenw1*m.cz3lw 1fy pl e3cclg/k. tical 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 charge of +40e. What is5ldop wq 1j0v5 the magnitude of the electric field at a distance of 1.0 m from thqpj1w0od5 vl5e nucleus?

  What are the magnitude and di c 01sj17x wxk2dnkj,crection of the electric field at a distance of 1.50 m from a 50.0-nCnck11jj, wk2d0 cx7 sx charge?

  A 5.0-C charge is 10 m froml7s a0ad 2r;nc a small test charge. What is the magnitude of the electad0n cs 7lar;2ric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small fkq),ix,ks, 35 zyma ntest charge. What is the direction of the electric field?xk fi ,a3k)znqm,y,5s

  A 5.0-C charge is 10 m from a small test c/e.(emrntc d 3:. pjhhheeg,rv28x r 7harge. What is the magnitude of the forcev xrht. n8e gdrh3eph(/2m7 ecr,e:j. experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 .fjv*r4k- 5n kxzk:opC and are separated by a distance of 4.0 m. What is the electric field at a poink-:p.r f4v5xk *znjko t midway between the two charges?

  A 5.0-mC charge is placed atd nq mq(.ce)ppto*p83 the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 303ce.)q*oppm( t8 nqp d cm mark?

  A 5.0-mC charge is placed at the 0 cm mark ofu-jc *dxd lh0t. si7lyb)e(p5+ mt,mn a meter stick and a -4.0 mC charge is placedhse0j .t )7 p+m(dicnlu ym*-,b 5lxtd 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 mC are placed ata5;mhgx 1 zro:f-2 smk x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway betw5xa-ho1 2kmsm ;z:gfr een them?

  Three 3.0 mC charges are at the three corne;v g3(g(/ glsv;priid rs of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field a3;g/dggp rli ((s; vvit the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the lg13, +bwf s dp)gik+gv8dbj3 corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1,g +vjggsfdk8bb1iw3d) 3 p+ l); +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 hnb0lr8ixdh7uz /0v: it is placed in a uniform electric field. What is the maudx8lv0h bh/z7ni: r0 gnitude of this electric field?

  A particle with a charge of 4.;acwf+t)rtz 1 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 abl6ntetiv4ks,1la 8 8 vkwn9n n86l 9hn electric field of 6000 N/C pointing downward.nbn8698svkil1w nhle8k n l, 9 atvt64 What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carri3r 5yxg2ta*4w0ntha ,n /mz25x d vhxfes a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity.5tmvnh /w x 0hgx2y5tn4a x*fadrz3,2 What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. *f,ud7akzvi2t h*aerx1ao-6 What is the magnitude of the electric field 5.0 cm from the sphere' 1-*ufz2 atxva*hdik ,7e6raos surface?

  A metal sphere of radius 2.0 cm carries/ob 1bd)2..vp afrq dc a charge of 3.0 mC. What is the electric fieldbv 1d crq p2/b.adfo.) 6.0 cm from the center of the sphere?