State the law of conservation of electfg sco*l49fy jm g+6yuww)s2j mwl.73 ric charge.

  Is it possible for two negaeh hed6,gvhoc5fh5t,; qrg s*9 4h 3pstive charges to attract each other?

  Is it possible for a positive and a nngh pif 4x(3rtw)t (qfnt6l5.egative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process thznis19)-/h xd(hc rroy a(3jv x,udy. e glass rod acquires a positive charge and-jdy)( d.,y rri hxo39 (suxhc1/vnaz the silk

  A proton carries a

  The model of the atom spuhdip *hia38t+*hbzxl5 9l9hows a

  A neutral atom always ha. mu k4r+s4ack+ +m5wmxw /gwls

  An atom has more electrons than protons. Thdrbhrc)j3au*z 8 ( 6cxe atom is

  Materials in which the electrons are bound very tqfyjd:)28h (l)v x uddightly to the nuclei are referred to j h()xqd:)dfvy8 ul2das

  Materials in which the electrons are bound very loosely to the nuclei andy 0b7 45m ndrfzy aedn)nw.9i) can move about freely rewzmyfd 9)ad7n4n 5i 0nb).ywithin the material are referred to as

  A negatively charged rod is broug sxmfr6fpy +*,-m2m klht near one end of an uncharged metal bar. Thefx,2p lk rmys+fmm* -6 end of the metal bar farthest from the charged rod will be charged

  Sphere A carries a netuedw9 , v0t o6dn8dc4y positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is groun8 u6v dd0cy,wt4n d9oeded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positivelywjcyam4 sfa (v 41z0 y q;o-r+uzdg;r0?

  An originally neutral electroscope is briefly touched with a positively charged a*0egf:mj hl( glass rod. The electroscopglh fem 0j:(*ae

  An originally neutral;i; 0w+8xz) kjgbowtg electroscope is grounded briefly while a positively charged glass rod is held near it. After the glass z 8xwwb 0+;o itggj;k)rod is removed, the electroscope

  A positive object touches a- -y:fyksorlt8f cg, v3g8i u7 neutral electroscope, and the leaves separate. Then a negative object foy8 gsfr 7,8u3gkic--v tl :yis brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on anf/ih4d*a /vio;r6rpjk,8dnd insulated table. A neutral metallic ball rolls straight toward the object, but stops before it touches it. A second neutral metallic ball rolls along the ph*8rof/d4jid 6v a,i/p;rn kdath 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 Coulomb constiffxjbw-21 +sant $k$, which appears in Coulomb's law?

  Two charged objects are separated rnu2fj72ob v gjl8h/ h.pi-mi m-*jg+ by a distance d. The first charge is larger in momrgh +m*uil -/f22.- p nv g8hji7jbjagnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are bf6lffz65h wek;;6lwplaced near each other on an insulated table. Which statement best describes the6f f5zh e; ww66l;bflk electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges o oa-.ou xu*/vs;ap j8in both objects are doubled with no ;ix*/o- o uasa8jpv u.change in separation, the force between them

  Two charges are separated by a distance d and exert mutualbbcox ;*n se7eg 0x2v5 attractive forces of F on each other. If the charges are separated by a dix0o g7ebnecs 5x;b2*v stance of d/3, what are the new mutual forces?

  Two charged objects attract each other with 9 +hkne3u6geg a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distancguk3 g+en9 eh6e between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separwxq43fbe2 : zyebsys5cjwzk l2 0*/-sated by a distance of 1.0 m. What happens to the mak5y2f zcsyswxsw* :ebe 3l4-0j 2bqz/ gnitude 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 to:vr2)w8)ful;y 9xfee jtqt; y the magnitude of the force on the first electron if a second electron 2vrle; qy:e) j 8t)ywf;xu9tfis placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What xceszpiok;- d7989ikhappens to the size of th d-ko ;k is879zecp9ixe 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 square. When aej0:o9l a1ihk 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 charal:k9 eh01 jioges 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 centroid of an equilateral triangle. Whkxd )twb x79)aen 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 7dwa9xkb)tx) the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is not a vecte r2b (vtip3 jzrfd onr:c92/1or?

  At twice the distance from a point charge, the strength of the electric fie ys.s u0oucm8d;ys,r)ld

  Is it possible to have a zero electric field value /j bnv(lav79l5d h9 nibetween a negative and positive charge al/ nji han(bd9v9lv57long the line joining the two charges?

  Is it possible to have a zero electric fi:/ b; x6ungfw)no+q dbeld value between two positive charges alouo/dq ;gfxn ) bnb6:w+ng the line joining the two charges?

  Electric field lines near psitive point charges)gfiqtfe7cy1 0) ej+ u

  The electric field sh vbd8oxo816 whown

  Can electric field lines i1.qyzopz5m2ike, yo2 s-m 3fintersect in free space?

  A solid block of metal in electrostati4 ;r+ir h5d -,rodzd/ef)y pjmc equilibrium is placed in a uniform electric field. Give a statementpz/h+m rd54er d,oj yr i;fd)- concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diametez ;z+ l1jcox;bgom t/sf/o5) ars are each given the same charge, the electric field (E) midway between the c; so+o51 )lz/t;f mgbja z/xocenter and the surface is

  A cubic block of aluminum rests on a wooden table in 340u a dslvze2i mx4(ja region where a uniform electric field is directed straight upward. What0ua3ze2v( s 4lm 4xjdi can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near anqze5avf,-5ee 2(a gx,e8flr n electric charge

  A positive point charge is enclosed in a hollow metallic sphere that ht .yro *dm-n5is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollo td5h .rmny*o-w sphere has

State three properties of conductors 9kol2b t,erc(xv/es; *hb ts5yx.8ys in static equilibrium.

State Gauss's law.

  The charge carried by one ma-8 d8k0qkaw 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 +2.00 mC. Howo-b*r(f1bs sv) sj v7w many more protons than elec-7bjoss*v) bfvrs1 w(trons does this piece of plastic have?

  What is the charge on 1 kg of proe*l8o d +zlep*y+ec7ctons?

  An atomic nucleus has a cpg4:l fyae8 -kharge 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 and -4.0 wj sb2+(6:nwqnh 3weon q0rqf90r-mvmC, respectively. What is the magnitude onven 0- 0nr6qq3b+frwj9m2:ow w s qh(f the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.gc z uj9 x9(+b,xr6pza0 N. What is the magnp +9(z axgur c,zxbj96itude of the second charge?

  Two 1.0-C charges have a force between theru k. 2s wvxj6*x 1xq.j458csyvq g;xrm of 1.0 N. How far apart are they?

  The force between a -,wc8e5x vmhf nl9a/jxbs:, s$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If thed2qxs ws1h7)i9 + rheksaof0,)s-ovey are moved to a new wv7if)ho+2 r9akdss- q sx0s,ee) 1 hoseparation 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. T c/tbmc9q h, bx)3s.jwhe 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 acts on the 9b/c q,w3m)t.cj shbxcharge at the origin?

  Three point charges are placed on the x-axis. A charge of +2. bvkz+4.hm :rv0 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 electr hrvvz+m k4:.bostatic force which acts on the charge at the origin?

  Three point charges ar6, 3ur/,bzxue eg9pfse located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -,3pe b6g,rx/u9ufes z5.00 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 plx go a5eyqi 1e fkbd*edc49m(7yr2l)4aced 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 the center. What is the magnitude of the force that ab97 *2e) a y1xcfmr4g4l5edok eiyd(q cts on the center charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.qoh u /8-n4;owo 7a2w9elm6lbzmfg q. 30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). zl fngbml q-8a2o 4owhmq.ue76;o/w9What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is ph3 q5k: :pj)q *x,iy n6gr:c1p*k-woeghfhlat (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force6cgp:*kh qy:lp *k )h :h31reqp,-on gjf wi5x on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilatera izm+ pv7v2ea0l triangle which measures 30 cm on a side. What is the magnitude of theezva7vim0 p2+ electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are an .0c,dedc:wseparated by 3.0 m. At what point, on a line betwe. : n,ccd0wedaen 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 dxh z3-no(rx3w, l- bzx = 4.0 m. Where on the x-axis can a third charge be bxz-(xdnw 3,h-3ozrl placed so the net force on it is zero?

  Charge +2q is placed atq ;, 4/- sdhqq*mewpgk the origin and charge -q is placed at x = 2a. Where can a third positive chqqmwkdqe4*/g ,h- sp ;arge +q be placed so that the force on it is zero?

  A copper penny has a mass of vbn xi l(7o+9n3.0 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 t ppd3eh3ioe)f)y4,xw he attraction of a fixed protonp4ex)y3hfe) ,p d woi3 some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung fromkb:(qjg r( aasi*d d s1q7 5,khy2h0xh:ql*tm a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between thegh(r1ldsy*0 : kmsqq aq i7kdxjb : h(*ah,5t2 threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. Whnxxf: 9-)+)jum vrox sat is the magnitude of the electric field at a d+jn-u mo)x 9:xfsx)v ristance of 1.0 m from the nucleus?

  What are the magnitude and nrwsy+bdb4s8 4u5lo p5py3e2ii :c /pdirection of the electric field at a distance of 1.50 m from3:srl5w4e5p4ibuy i8+ ps2y pncdbo/ a 50.0-nC charge?

  A 5.0-C charge is 10 m from a sm ve )y/76mlhqgall test charge. What is the magnitude of the electric field at the lo7mhg yev6 lq/)cation of the test charge?

  A 5.0-C charge is 10 m from a - 1pfxnik )qpyj4 fish34i/f1 4tu/ cqsmall test charge. What is the direction of the e jii/141qf - 34 x4t nkiyp/phf)ufqsclectric field?

  A 5.0-C charge is 10 m from a sma7rt.vnx )7lsk m*thw*ll test charge. What is the magnitude of the force experienced by a 1 x7hsrtn vl7t*)*kmw ..0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distancstyg7 3;;ptkzmzk ev4,,j6 cd 1yd5ake of 4.0 m. What is the 6dm;v,z k y7s c 5; 4j1et3yg,ktdkazpelectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 ny (39bo,elb ,thqa3f tru8,dmC charge is placed at the 50 cm mark. What qr b98(f,tl,uteaodhbn33y ,is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a met qnm:zx, z *qc*-x3nnter stick and a -4.0 mC charge is placed at the 50 cm n mxc* qnq3*t:z-zn,x 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 x = 0 and x = 1a yq-llb57n:0k z uurkth44e(pmba60.20 m. What is the magnitude of the electric field at the point midway between thez40 hu m:bt- (ana6u5lkbkley7pq4r 1m?

  Three 3.0 mC charges are at the three corners of a squa -sr a*avjnuehe1 ba+5yzu9/zjwc;+4j -xw 5jre of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center 5/v s-+ewzzjhryaubjju*ew 59j 4;a+n- ax 1cof the square.

  Consider a square which is 1.0 m on gyhmt5d2o: m b p3h+0wa side. Charges are placed at the corners of the square as follows: +4.0 mC atmo ht0 y:gm 3w2dh+b5p (0, 0); +4.0 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 i0, ezpey9 xkl(s placed in a uniform electric field. What is the magnitude of this electre0leyzk 9p,( xic field?

  A particle with a charge of 4.0 mC has a mas0 c:(,:o+7dw k9iae l)rh td*uclzrzqs 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 hoscrx ,rb 49i4w( (r;a7jin y6000 N/C pointing jh;4ar(ib7 co( rrs n9y4 wxi,downward. 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..0r7 em ;tv9l. dq.o9xgdudwx 00 nC. The ball is placed inside a uniform electric field, and is suspended agatled9 .0.d ow.um;gv7d qx9r xinst the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carriesw, rsk.e, c9n c(/wr3akhl: 2go6epz(jaza r+ a charge of +2.0 mC. What is the magnitude o ar,2a w6rslkow zh.ge :93r(zca /(jkecnp,+f the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of lil,r)g. 78 tgckbv w13.0 mC. What is the electric field 6.0 cm from the center 1gvlr b7,ick)l 8 gt.wof the sphere?