State the law of conservation ofp(l4ew jy(4 af electric charge.

  Is it possible for two n /da ,ti7h r:hlix2po/egative charges to attract each other?

  Is it possible for a positive and a negative charge to at; : g4jarxooa;tract each other?

  A glass rod is rubbed with ai4nayapb4do(z0:6s +y4 lnuu .qo fl9 piece of silk. During the process the glass rod acquires a positive chargiplu4z osd 4 o:nab9 fuql60a.(ny4+ye and the silk

  A proton carries a

  The model of the atom dvu y)2f22 dz1rc4-z ov5cho vshows a

  A neutral atom alwaymgh2 yat 38d8ls has

  An atom has more electrons than protons. The atom is,ddlf8gw b9g*

  Materials in which the electrons are bound very tightly to the nuclei ak moo da;+-:fare referre+ ako;dao -mf:d to as

  Materials in which the electrons are bound very loos9jy ktzdfac ql0/,5d( ely to the nuclei and can move about freely tfk5d(yj9,0a qczd /lwithin the material are referred to as

  A negatively charged rod is brofk*n:uvaskb m 8x:;6uught near one end of an uncharged metal bar. The end of the metal bar farthest from the chargedxub*vfu8s :nm6;kak: rod will be charged

  Sphere A carries a netxk)*cm 00-yhzlwg(y z d t1b9x positive charge, and sphere B is neutral. They are placed near each other on an insulated tablhg (tyw)zmkxb19-cz 0d*0 lyxe. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscoqwcxc doxc-yz07 k, :rv7/t(tpe positively?

  An originally neutral electroscope is b) ;lw9o( tqkte yng2j6dt5ev4jo -yv 6riefly touched with a positively charged gd kv6eqo9j 4g;v6t)yoj (5t ynew-2l tlass rod. The electroscope

  An originally neutral electroscope is ground e4s w9p7(bjzhed briefly while a positively charged glass ezph (94j 7wbsrod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a n1wc.rmi3c5o :,xsfhn;:xa xpeutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it.; mp31:ocn,ixc:frxs 5xh.a w What happens to the leaves?

  A large negatively charged object is placed on an insulated5tmnq9e )nedbvl ot54( )ze 7z table. A neutral 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 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 neb)nnz(5d9 em ) ovte54zeql 7tgative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coceqg/n3qn1di/,i:zv l; fc0vx(f g4uulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chargegd( b8qm,iqz,z; tut)b 7-fhz is larger in magnitude than the second chargz zbui;, gd htfb-78zqmt,(q)e.

  Sphere A carries a net charge a iesf2vogji;n-lf v dz*)e2)0nd sphere B is neutral. They are placed near each other on an) ivif- o;0dl2efgj2n *s)vze insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects aj9g-fl7a fcy. ttract each other with a certain force. If the charges on both objects are doubled with no change in separatio.jc9 f7 -aylfgn, the force between them

  Two charges are separated 7 3vhhj8 vmfz7by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mzv 7vhj7h3 mf8utual forces?

  Two charged objects attract each other with a forchdclo7pwv3 v l6 ,r.t(e F. What happens to the force between them if one charglhvpvc,3lowt 7 d(r.6 e 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 to

  An electron and a proton are separated by a d4t5. cr*fg ispistance of 1.0 m. What happens to the magnitude of the force on the proton if a second elect. 5frtcis*4pg ron is placed next to the first electron?

  An electron and a prouckjr.t :) n9xton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a secon .)9t:jcrnuxk d electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. )z-yb zw,6atvWhat happens to the size of the force on the proton if the electron is moved 0.5w)b za t6yvz,-0 m closer to the proton?

  A point charge of +Q is placed at 9 v;.ltd tdwb.the 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 pvlb .w;tddt9.ositive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equi ++g* .sjlii qzp*yor6lateral triangle. When a second charge of +Q is placed at one of the triangle's*r*i+zjg q+i6y. plos 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 following i0) l1q5j cu/v*xl5 e)bicru bys not a vector?

  At twice the distance from aik / z31q *ljfy8ylm8n point charge, the strength of the electric field

  Is it possible to have a zerbzol ::esq xb:v) fj*0o electric field value between a negative and positive chab:so*l:v)jef :0qx z brge along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive charges)t5n amqt7hj; along the line joining the 7 tq;j tm5nh)atwo charges?

  Electric field lines near psitive point cha7pun95m *f*ol*w1e5m nf.q.amz ylib8. fb xt rges

  The electric field skgm+/b/t;m v r/va-eh hown

  Can electric field lx,)h sq-wn45qmc1br oines intersect in free space?

  A solid block of metal in electrostgedz+ qi3w;ar9pu0 c,af*bbjxto1* 2atic equilibrium is placed in a uniform electric field. Give a statement crtafbw c*g opqb+u*xi9zjed a231 0 ,;oncerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equao(a+p w vqx3odq3qm w()j9s6nf woc/2 l diameters are each given the same charge, the electric field (E) midway between the center and the surface i(+nd qmowa3px2 w/w9 qso (ocfj3)vq 6s

  A cubic block of aluminum rests on a wooden tablpj c 1: n.:4rtk,vllxye in a region where a uniform electric field is directed straight upward. What can be said concerning tcjl4. :1vnp: lyrtkx,he charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric +k el4- wvk6ed5zl 2lduc*kj,charge

  A positive point charge is enc,wxpt/w1r lt7losed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the elec w,x1rp/7ttlw tric field at a point directly above the hollow sphere has

State three properties of conduy otckwxh;4,f ;bm*; tctors in static equilibrium.

State Gauss's law.

  The charge carried by one electron i:yx:w kn8drh 6s $e = -1.6 \times 10^{-19} \; C$. 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 l8 ll4 i6uqj6uelectrons does this piece of pli 6 qll4u8jlu6astic have?

  What is the charge on 1 k(). dr4 tvr)qz,vvp/3xn m oiog of protons?

  An atomic nucleus has a charge edih 6(un9s pq:vr77 mof $+40e$. 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,pc-onnm j7 3h.0 and -4.0 mC, respectively3j7p nh ,nco-m. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m frz xtb1w v 1;pryl6p)r6om a second charge, and the force between them is 1.0 N. What is the magnitude of the s6 zpvyr wlrx;tb1p61)econd charge?

  Two 1.0-C charges havg7ymjjv./ w8mcb + jc( 1 utp/28jicvve a force between them of 1.0 N. How far apart are they?

  The force between a 6xn/gdi e,d e3q f5: cca.jy0z$30 \; mC$ 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 p8szkyvdh nr ,h 33:1vuaq)u k,x:+tkthey are moved to a new sah1u d+z uq,t):skvy33 :8 ,rpv hxknkeparation 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 kunmsh b0st(s * wx3xnt.z 1c )g,8rk/first chargecu w8.khnsgttks0nxb,3* 1 s mz/(xr) 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 charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed *sply2e6:*v dyfsujs4. tktmw),t; g 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 for: f.w l2 )yuyg4*t jk vp,s;d*stsem6tce which acts on the charge at the origin?

  Three point charges are located at the follo-zu ipg8wr7+kvas;skm,8 ;xh wing 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. What iskxrhsk87, +vgwz8-a s;up;im the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the cente1fmw5p+46* j7 hppnbngv kj)gr 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 acts fp+4h 5jwnjkm )p*g 61bn v7pgon 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); Qx.)e)an*;t ) amsnoz e2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net fort )nea esno;))a.xm* zce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = +yi8kw9,iw8gk )mbik+.mxud-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction ofim)8bw,98+im+xyd .ki gk kwu the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices oudmk(tl2*v8o y hah(1ae :n1sf an equilateral triangle which mesye1unadvl1o (:h 8 (2 m*ktahasures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q aqe,v*cwt;n6 8 .pu 6lv+s qwtgnd +4Q, which are separated by 3.0 m. At what point, on a line betq+ ,6;v*ww qcvg6 lt8n .tsepuween 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,b zau05s yizlircj4;p+e y 1; 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 puszb,r0 y+z5y1c ja;4l ii;e net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x uyox1nao78fej e06lpn1 3dr*/ 5fc mc= 2a. Where can a third posy 3oeff* 116o n7mpxedu/larcj 8cn05itive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tota kt r6lq16hxi)l 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 aga8gu/ ly3l3rubinst the force of gravity by the attraction of a fixed proton some distance above it. How far above the electlulbu83 yg r3/ron is the proton?

  Two 0.20-g metal sphe8kql nc65 n ,awms4,sv zsqj62res are hung from 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 the threads c n6v,q2 6ssa5sjzm 4lnqw,8kis $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What i*p jpr,ecd(za l.fm:u 7:w+g gs the magnitude of the electric field at a distance of 1.0 m from the nuclewm:u,*p+ac:gz7 jg(df. plr eus?

  What are the magnitude and direcq/1 t3 2gd3ytzkjuf6ruq . n2stion of the electric field at a distance of 1.50 m from /t3r.f1y3j u ng t2s6dqqzk2u a 50.0-nC charge?

  A 5.0-C charge is 10 m from a s-pa4ap 9f lsa3/ whh*gmall test charge. What is the magnitude of the electric field at the location of the test *p/hlahwpg9 a3 sa-f 4charge?

  A 5.0-C charge is 10 m from a small test charge. Wha jjtxb9:+e df9t is the direction of the ele et:9xfjb9+ jdctric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude ,5bh yaokvh+k 5g0j y gm:/hb-of the force experienced by a 1.0 nC charge placed at the location of the test b hbg-g h kh va0k+5moy5,yj/:charge?

  Two point charges each have a valui2 jo:m. xp;a iehft21e of 3.0 C and are separated by a distance of 4.0 m. What is the electrii h1oapx: me;t2jf2i .c 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 mC chofvu5ia;*i ctn )67bd+fv+ rqarge is placed at the 50 ci 567o cvutdvbnir *a;+qf+f )m mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at t ylqup0p1 ;e4the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two cu; 4qetp1pl y0harges is the electric field zero?

  Two point charges of +3.0 sm+axogv42 n7.*gf ft mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway betwee+n tg omv2*fxa4 fg.7sn them?

  Three 3.0 mC charges are at the thruehou k9t.;o)6kad*qd tt m 9d,xtn 27ee corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. k7t9te. d69*hm;tou,q t)xd du2onkaFind the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at t 2oq bebr*n(t;he corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); +3.0 mC at (1, 0); -3.0 mC at (0, 1). What is the magnitude o2* b(bern;qo tf the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is plaxvgm w6t: j5,ah/tk e*ced in a uniform electric field. What is the magnitude of this electric fi/a 6hvex*, k5t:mwgjt eld?

  A particle with a chargy9n u b/op/ p1gx1ds(ge 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 a9dc zpu ddlo1*y3tj4eel24s mmi06g(n electric field of 6000 N/C pointing downward.lcm 42djg3lyed* z9 (p0d6t 1soime4u What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge h/lsrz /on z:-of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magr/no/-:z lsz hnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is 26k +y-blsc1pc*agfs the magnitude of l62+kcf sygs*1pb c-a the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries l 04f hwqil ib6e+2s-la charge of 3.0 mC. What is the electric field 6.0 cm from the ce0fil 4-we+s 2lhlq6binter of the sphere?