State the law of con8v d/e/fbrgywhf 9)mo k1 *pi 6nop23gservation of electric charge.

  Is it possible for two negative charges to attr /2tni n.-f7bni-u o;) ewouyfact each other?

  Is it possible for a positive and a negativvz0l:jol wbzx1mfnm /-+ ok+ /e charge to attract each other?

  A glass rod is rubbed with a piece of silk.x5eqc6 5bkb .7ur(opw During the process the glass rod acquires a positive charge an.cp o(w5r 75ubqxk6 bed the silk

  A proton carries a

  The model of the atom show8j*tmk m9)9 fqytafpn) ;hl.bs a

  A neutral atom always 9bw)symgd*08 nvvbw* has

  An atom has more electrons than pr1rxtr7,cae18+f5xd0zvh tzf3t gb8yd4um9 rotons. The atom is

  Materials in which the electrons are bound very tightly to the zcs. 4z.0xphp nuclei are referred t hcs4z .0pxzp.o as

  Materials in which the electrons are bound v8 h7 +wiog5vemery loosely to the nuclei and can move about freely within the material are ri8+m5h7 oe vgweferred to as

  A negatively charged rod is brought near one end of an uncharged met,sude x. utw((al bar. The end of the metal bar farthest from the charged rod will be,xw s(.d(teu u charged

  Sphere A carries a net positive charge, and sphere B is neutt,n5t( xdagu(59h u mmral. They are placed near each other on an insulated table. Sphere B is briefly touched wit tmx,d5m(unag 9t5(huh a wire that is grounded. Which statement is correct?

  How can a negatively char8qtde5t0+,gp2fkgz u ged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positi/wp8n56iw gs fzl,-)hs, r.krw 5axmrvely charged glass zrln,wa r8xgmpw.6r f)5 5w h-/iks s,rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively chaeu)sl, /tj bd2rged glass rod is held near it. After lbu/dtj,2se) the glass rod is removed, the electroscope

  A positive object touches a neutralct 8( ;9ltb2ufw, cocuo-0pbz electroscope, and the leaves separate. Then a negative object is brought near thzcto p2w 9tc lf(0 -,ob;ubu8ce electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. e hgrz3 .fpbtw r31s64A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutr1g3 fbrz.rh6wps e43tal 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 - dk7a+y8swce*+ag jk gbj ;/dthe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. w32n b9za rum0 The first charge is larger in magnitbn9 2w 3umz0raude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed neag;up-xrux- d: r each other on an insulated table. Which statement best describes the electrox:p rgd --uu;xstatic force between them?

  Two charged objects attrac(fy/d0cwn b o4t each other with a certain force. If the charges on both objects are doubled with no change in sepa yonfcd0/w (4bration, the force between them

  Two charges are separated by+u4dm*m,n 8ndypi.y y.)bipa a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distan nd4i* ) d8ya..+pmyuny,pm bice of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the65qu: jl6 uvyi force between them if one charge is doubled, the other charge is tripled, and the sei6u6:vujqyl 5paration 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 distance of 1.0 m. What happecbh vfhapwg-6i / s1/ bjl.1/ins to the m hsfjhap-b/gc i. wi1lvb//16 agnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a protcr(*.3- /qnf9t zttkb6 fg9botm x3idon are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a tfc.mo6rt(9 xq fdi3t gtk/-b9* 3bzn second electron is placed next to the proton?

  An electron and a proton are separated by aia r27yub * hru(;z0ou distance of 1.0 m. What happens to the size of theu2uia;0hbo r(ru* 7yz force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a ;1npb1rp8z r x1bg4a dsquare. 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 tp1db1rnx ap81g rb;z 4he magnitude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed atf456wv ,xc6.se 1ptn1b1 p1uy fqajug the centroid 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 wu56 xqp4 vsp1ftj y116.nu,eab1 gcf. 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 is not a vector0br);l f ,4nv rovsg0d?

  At twice the distance , *bmfg:pqltoq;c *gs j:k:3i from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value betw03 5;j deeo/hc 3t pd:wjsbnr/een a negative and positive charge along tj3c/t se3ojbw hd5n/d: p0e;r he line joining the two charges?

  Is it possible to have a zero electric field value between two positive chargnm6 7dxf3a(m zes along the line joda3nfm(zm6 x7 ining the two charges?

  Electric field lines m)r-gchto t) .+gwr5x o s4g2onear psitive point charges

  The electric field shlyv9swz9c k7/puhn x 8k)y*r 2own

  Can electric field lines inwso6unl(8k47 qcct/ w/ vd8kntersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform electd qi181,dvu+4nbe t)ezdl,h oric field. Give a statement concerning the electric field in to4 t1e,nzudld e)1ih+vdb, q8 he block's interior.

  If a solid metal sphere and a hollow metal sphere o jln 0yoqxx3qdte*7:5f equal diameters are each gil *ndqxx05yojt e37:qven the same charge, the electric field (E) midway between the center and the surface is

  A cubic block of alumu tg( sv0:vs-minum rests on a wooden table in a region where a uniform el(mvss g0-:v tuectric field is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium nuwv axfh2:-e q)l: fm0y7t ngen)b49vear an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grounj3 xq-d/ 8seunded. As compared to the 8j 3snqx/eu d-case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties0.qt/:v- wsn7mbjcrro)e es8 of conductors in static equilibrium.

State Gauss's law.

  The charge carried by 5-;x* lk6(tyjc0rczwn9p ga rone 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 ne7l5fhh +5rtvg t charge of +2.00 mC. How many more protons than electrons do55 g7+hvtlf rhes this piece of plastic have?

  What is the charge on 1 kg of protons? tgezcn+/m3q gn*j u)3bb-. vi

  An atomic nucleus has a cqf6/ otp+3fcpharge 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.dy )d fx8/icwo m o-4+sgpb09p0 and -4.0 mC, respectively. What is the mx oo idw+4s)/f0dm-bpy 89c gpagnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the forc72aeam 8i/n 65zfzpuat0rl9 c e between them is 1.0 N. What is the magnitude of thze87a 2 0am f5ap 6tz9rlnuci/e second charge?

  Two 1.0-C charges have a force betwefq* r4q /;rfupen them of 1.0 N. How far apart are they?

  The force between a r8z nv( ug:fpve09r8j$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially zk wk9a6vzh/ ;c0+xhe 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 t0wh evaxk kzhcz/ +6;9hem?

  Three identical point charges of 2.0 lz 81ya1s.x hqmC 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 a ya z8xs.11hqlcts on the charge at the origin?

  Three point charges are placed on th10dcrpl e4b7ve 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 v0p bd7l4re1c the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at theh++ r74emgary following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00hm +gyr 7e4a+r 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 place0 7-h6sd nd f8neosq4id 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 fesddn -o8 4n7q0ish6electrostatic 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 m +6u2ls9irvuctb9+kc , 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of tc+ tkub6r+92isv 9lu che 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); Qyo7 a+k voh,,q3 = 5.0 nC is at (0, 0). What is the direction of the net force on ohv o,qak+y,7the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equil e *m yl1:ql5ex+qcpg2ateral triangle which measures 30 cm on a side.1gp 2y* +mceq:5xl elq What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which ar/ .cubu6 m3 *cqu/ds,l: dwtdkxp la1/e separated by 3.0 m. At what point, on a line between the /*xcba,/ kt/u.w 1plu6dqd l sdum:3ctwo 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 charud 930z-vt omaris6f-ge is at x = 4.0 m. Where on the x-axis can fdot-u 6vmri s0-9z 3aa third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Whed9hj-gq o.f+4m u fn-jre can amq+jfdo -9-.nu j4gfh third positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g;dm z1+k etdu2. 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 agains(ocv-n7ew 2 wtt the force of gravity by the attraction of a fixed proton some distance above it. How far above the e t7 (vec-2wonwlectron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thrp 3c1p g,l-rsueads which are 30 cm long. Both are given identical charges, and trl, gp-1p3s uche 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 is the magnitude of th2h .xxj,v.ga33uctyy e electric field at a dy.hv.aug jxy32 ,tc3xistance of 1.0 m from the nucleus?

  What are the magnitude and direction of the el) /tu3 ur3w;wq jgsu5mectric field at a distance of 1.50 m from a 50.0-nC charg 5;rg 3)uuuq3mw twj/se?

  A 5.0-C charge is 10 m/0pj d vdohvnll04 w u1h53vpa3f (5vc from a small test charge. What is the magnitude of the electric field at the location of toddnv0c5 4uhlhvj pp(f5a w33v0vl1/he test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction ofv0ze 6wf0p :d ( .r8va3zvsyxz the electric fid.se(v 03xp 6yvw rz0v a8zzf:eld?

  A 5.0-C charge is 10 m from a small test charge. .wwf5)8zo8 gx/e8gjh6pvpmhlf z*j (What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test c8)lzwf5gh 8 wmhve/pzp.( ojxf6 gj8*harge?

  Two point charges each have a value of 3.0 C and a9- nlyx4 9sc*gc1ftzb re separated by a distance of 4.0 m. What is the electric field at a point midway betw1-9gs 9ctlfcxz* ybn4een the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC ch3:r:vw n.cz i6txj:lqarge is placed at the 50 cm mar irq6jt3wl. nzcv: :x:k. 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 mC chargee7f wxrh6n,h 4 is placed at the 50 cm mark. At what point on a n6h 47fxre,whline 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 andmnw9wea, h yi:1t1sy0 x = 0.20 m. What is the magnitude of the electric field at thyi wms h w,:1t9ney10ae point midway between them?

  Three 3.0 mC charges are at the three corners of a square oxx+ i :(vu+wkdf side 0.50 m. The last c ixw(:ukdvx ++orner is occupied 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. Charge r:0efse wp9iv 7*,3glp) l:stada cz-s are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at ir,sl*eeac) :pa97f s:pz-t 3wv0g l d(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 char7 w7*q un;ypwbge of 5.0 mC when it is placed in a uniform electric field. What is the bu;77 yn* qpwwmagnitude of this electric field?

  A particle with a charkkn. 6ej4 aas-(ubj8uge of 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 ofkdai e4 -9mf6d 6000 N/C pointing downward.iakf- 6d4em9d 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 bal2it 0xsjm ,fwu kqr+fp )5*r:kl is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and directiwxs+i2r0fmtk pk q,ur5f* :)jon of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the y*: ; h0fumaybmagnitude of the electricb yamyfh;:u*0 field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. box)c5z m(g9,qku)a u What is the electric field 6.0 cm from the center of the sphem)go(cuaqu, 9 k)z 5xbre?