State the law of conservation of electric c0y - rbxg 11i :9frfpukban8r.harge.

  Is it possible for two negativek-i vffv ai88)+cw98j mliwy4 charges to attract each other?

  Is it possible for a positive and a negativr8r iyiq06 bk4e charge to attract each other?

  A glass rod is rubbed with a piece of silk. During d.l9t6bv6by rddq (s*the process the glass rod acquire*9l sb (v.brqd 6yd6dts a positive charge and the silk

  A proton carries a

  The model of the atom sh o 8)q 3g, l:,upmq5ces(gcbfkows a

  A neutral atom always has )*rzgs53 / xiynx/ewd

  An atom has more electrons than protons. The atom 4dwbj060az w eg80vu4efu g/yis

  Materials in which the eledg3l;k l( n99gohjgi0 ctrons are bound very tightly to the nuclei are referred to idglkh g9o9l; gn(j03 as

  Materials in which the electrons are bound ven+gwgy../w kjry loosely to the nuclei and can move about freely within the material are referred to as/kw.jngwy g+ .

  A negatively charged rod is brought neafypdjdasi+ ntvu:8 .ivq-t83zr9p8.r one end of an uncharged metal bar. The end of the metal bar fartr-9aiti.v8p.zq 8y:8u tsf+ vd jn3p dhest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutrqsa2t/ oucf;7al. They are placed near each other on an insulated table. Sphere B is ua/2ct;fso 7q briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively9ht3-aq14 n whk+k skp charged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively chargls /(pta+dfd *ed glass rod. The el(dd s +ftp/l*aectroscope

  An originally neutral electroscope is grounded briefly while e,kk/,; qrxnv a positively charged glass rod is held near it. After the glass rod is removed, t/,qrvek ,knx; he electroscope

  A positive object touches a neutral electroscope, and th n) ,.,gnkxly,8z)bkg pm ujutkc2 s3;e leaves separate. Then a negative object, zuplkk ;jut)nmk,c.y238s nxgg)b , is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tabl)e w cvtk01xo711uhdagjc)g9v i 0gn7e. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A ae 9hd)nog1)0gvw i 7 jx1cc0u gk7tv1second 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 t8qn: n si-pcg,he Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. 0rfe,v:2nc-1pzitysl*j dz 0 The first charge is larger in magnitude tly jsf*0r t:eniz2pv-0zcd,1han the second charge.

  Sphere A carries a net charge and sphere B is neu3b(fr icc o i+mzt -z2j c/wc:,n90uq9zuur 2ptral. They are placed near each other on aoqpuj 2ur t- ccwu c+zn/90iz,9z 2irfc3(:bmn insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each otheras( cohb,f re.nj xg+7i/o 7d6 with a certain force. If the charges on both objects are doubled rh7xo bfd+/a,ecn6 io.sjg 7(with no change in separation, the force between them

  Two charges are separated by a distance d and exey.;ieumki l- pm;b; u9rt mutual attractive forces of F on each other. If the charges are separated by a distance ofykiipu e.u;l ; -m;b9m d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens tz-xc yvv +bp )bj:5s-qw re68go 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? The force is now equal tej56 xp8 :w+cvzqg--bybsrv)o

  An electron and a proton are sepncd. w lrj3cf.(w7s t1arated by a distance of 1.0 m. What happens to the magnitude of the fol7n 3 f sj1cdw.r(w.tcrce on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dista6egaz j/-p) f:znqvu4 nce of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next)4j-zfpe aqvu g /n6:z to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What huz(i;jkhir,ut.pj/y r z 7 kx6/ nc1,happens to the size of the force on the proton if the electron c iphrzz,kj/ni6 j. (tu, ku xy;1r7/his moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a d6 vjge4srh3*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 o j4 6gs*3vrhden 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 centrob m)rd/ u3g 8gis27kbuid of an equilateral 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. Whum8bi2bgg 3rdu7/ ks) at 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 is not a vect j7uu7u m*n))grav f5dor?

  At twice the distance from a point charge, the strength of the electric f3pze ,prhrb(2vodh)oze2q3 g :hr; 1qield

  Is it possible to have a zero electric field value between t- v.rsj8i1lx a negative and positive charge along the line joinit.-8j1 ri xlsvng the two charges?

  Is it possible to have a zero electric field value between two positive ch h17obay xg+xs;4 nm4warges along the line joining the two charg+bo;1ym h4 wxxns4 7ages?

  Electric field lines near psitive point cmz k2db 1asy.iw51s-iharges

  The electric field shown57l (1likmyx i

  Can electric field lines intersect*f;*-ro ycw:cw3)n vs5b tu +8gabuk p in free space?

  A solid block of metal in electrostatic equilibrium is placezk): inl *p*and in a uniform electric field. Givek)*np* a l:zin a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of ii:b/g yys:liv; mf 4ku;u89tequal diameters are each given the same charge, the electric field (E) midwa:mvuf y94igy8 t;ik i:;s/ ulby between the center and the surface is

  A cubic block of aluminum rests on a wood2/dcbxvo1-+qotr iw9sm 8d:o8zm , ihen table in a region where a uniform electric field is directed stra 28b wv9m+,d/cdo8ot hm-qi1srx: zoiight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an elect8.g2 zk obu 182dy3av)p dpc dnbah1w7ric charge

  A positive point charge is enclosed in 72 qh(yww thwg*68qu pa hollow metallic sphere that is grounded*6y w2w7hqhp gtqwu8( . As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors4,acp9 x28xg v kvfo+lvx.o.y in static equilibrium.

State Gauss's law.

  The charge carried by one 6pd5 1 -:iabh h6xcglkelectron 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 epl.llb woam :fzz2 :)nry 3*i7lectrons dol: yr3*z .2op ifz7mwla)n:bl es this piece of plastic have?

  What is the charge onoq0m ,wcvcz7q:9t8tb 27qniz 1 kg of protons?

  An atomic nucleus has a charge 7v4t4nfe -,k8hdtjgjof $+40e$. 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 valueshug*n h5oy ioz)o+4 1y of 2.0 and -4.0 mC, respectively. What i1)iy yo54+h ug on*ohzs the magnitude of the electric force between them?

  A 1.0-C charge is 15 m fro xei 34go.(+y:wf wlznm a second charge, and the force between them is 1.0 N. What is the magnitude of the seconie3zwgyf+ xwn.l o:4(d charge?

  Two 1.0-C charges have a force betweekzr. y6y +s;pk ejsp.4n them of 1.0 N. How far apart are they?

  The force between a zqzaf)62ij/s q osj07$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 7au9jh-fuj:leqvs s (d,f ( p:2.0 cm apart, experience a 1.0-N force. If they are moveddu e (9j(qa sjp,:fvh:f-u ls7 to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first(:li ps +.,mqgjhzm 2x charge is at the origin, the second to the right at x = 50 cm, and the third is at the 100 cm mark.m m:p g,xslq+ zjhi2(. 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 charhlzs,yp1, g 3df-w hxbe- 1+feieg,8x ge of +2.0 mC is placed at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 mC ,+w1xhhzebsx-y3,egg lf, pi-ed 1f8 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 the following positions: Q1 = 2.00 m,e2 7e ;aktrut0mez6z C at x = 1.00 m; Q2 = 3.00 mC at x = zt 07,e 2tz6aue ermk;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 p vxptf+/g qc+7fevj4.laced at the center 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 thtq fvpe+c+.vjg4 7/f xe 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 m, 0); Q2 = -1.0 nC is at l9(xm:b2zfy u w+.xwu(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC : b9 xwuzluw f+(m.2xycharge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0yr6x8/f),9 cp um hca9/ohyia, 0.10 m); Q3 = 5.0 nC is at (0,cp6 ,o x)h8ycmau/h/99arfy i 0). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges ofxid8p+fti)j+wn** v cunu lf d;:c56d 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 i *tc5n ddfc*+l u+:p8x)dj;fi 6nvw uwhich acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separatedvkj 7yb2k0,f 5akf u8g 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 on it would be zvagbfkfuk,y0 78kj25 ero?

  A +3.0-C charge is at the origin and a +9.0-C k31 a-(ty tunljnyi)4l(0o k jcharge is at x = 4.0 m. Where on the x-axis can yo-ut0k(nliy 4jjn 3l k(t)a1a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the or3ivxn)lx 5 /q6mlmd,rigin and charge -q is placed at x = 2a. Where can a third positive charge +q be m,xmlvrdiq)n5 x63l / placed so that the force on it is zero?

  A copper penny has a mass of 3r(xfauu 5u 6-wr x;w)n.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-swk bprnfo/t w w9-zr w131s2 the attraction of a fixed n9swwf/r3bzp-t1k2s1 ro w-wproton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung froqr cj5rgg 2,7,d 8euprm a common point by nonconducting threads which are 30 cm long.qg, e rr7j28 puc,r5dg Both are given identical 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 +40;wik.xjx5q, tyj*x a9ok g)y-e. What is the magnitude of the electric field at a distance of 1.0 m from the nuclg;9jqkkxx5)y. yj -o x,i*taweus?

  What are the magnitude and directio el22vi sc s,9:jzxbp9n of the electric field at a distance of 1.50 m from a 5lb:js 9xscp2zv,i e290.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of5ql2 r6u-ne b 1azo 1w24enjkn the electric field at the location of the test ch u11a5n 6le w2 nbezkoj2-4rqnarge?

  A 5.0-C charge is 10 m from a small test charge. Whaez nqtnsi*4ywxp0 awk/*v)at4( ,+ybt is the direction of the e4b y (tise+zx wvtan*qpw a),/nky40*lectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude oa:,mu80hfi vhf the force experienced by a 1.0 nC charge placed at the location of the th,8uh vaf:0miest charge?

  Two point charges eaii3 -hhn3q/e v:hnm+hch have a value of 3.0 C and are separated by a distance of 4.0 m. What is the eeh3 +3vhm q -n:/hnihilectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at0u) i;+xytuv8wj +jmv the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is tu +j x) 8w+;0ujviyvtmhe electric field at the 30 cm mark?

  A 5.0-mC charge is placed l 8ptq/r g rzusww1/g/f 3gc-e- om4w7at the 0 cm mark of a meter stick and a -4.0 mC charge is pmfgw8 ezr/3 /-cowp7 ur1lgq4 w gst/-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 and -7.0 mC are placed at xyco 6+cb/, anh = 0 and x = 0.20 m. What is the magnitude of the electric field at the point +abn , /o6hyccmidway between them?

  Three 3.0 mC charges are at the three corners of a square of s ajjsns:,ceuc ut;)1/ z1 phs/ide 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the cenpts:u1c/ cauejj,); nzh s s/1ter of the square.

  Consider a square which ij3v 5bhyoh,4h g97-jw vamv i)s 1.0 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +vh gjvmvw -b74, )oya35hjh9i4.0 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 unimsgr9i29 kd(l- -nvjq form electric fkjgm9 (si -29-vdrqnlield. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mayzii4m )kz /z7ss 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 pl* ej; oo6koh( yh60oitaced in an electric field of 6000 N/C pointing downwatjo*;iy6e6o ho k0h(o rd. What charge 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. The b29ycfyq h gp9js7 cr;2all is placed inside a uniform electric field, and is suspended against the force of gravity. Whapyq cs;2rf7h29c9jgy t are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.a7 1m;akut g-7y6zs xa0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's sur st- 7ykaa67zx;mgu a1face?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What isiq vbe5we2g7b1+z;0,6s x, y ca dffxfv/nkr5 the electric field 6.0 s;/2cde g5+0 iarbfk qfezx vyx ,n1vw5 b,7f6cm from the center of the sphere?