State the law of con,fp6btin d2j)servation of electric charge.

  Is it possible for two n+n yqd+fi0bd:egative charges to attract each other?

  Is it possible for a positive and a negative charge to attract each*qtq 0 zyc48sqnum-m - other?

  A glass rod is rubbed with a piece of silk. During the processzq n*5:nlp d5tot, 1yd the glass rod acquires a positive charge an55*ltdpq,zyod:nt 1nd the silk

  A proton carries a

  The model of the atom sh8f fv78wgn+0 k9tly,ktr/jn wows a

  A neutral atom always has; wgd o9.uvk /fbq+e9r

  An atom has more electrons than , 9*xnmd vsrd+5n gync v7.uj b3.lhh,azpp(5protons. The atom is

  Materials in which the electrons are l q ,)f, ov;ldzzq)hh(+p 1piubound very tightly to the nuclei are referrzq1(+) p p,oliq)hvfh ,dlz;ued to as

  Materials in which the electrons are bound very loosely to the nuclc kkcq9p /0)mu (b/fucfr clnz/:d-y;ei and can move about freeld// mr9qzc-uc 0f)b;pf yl/:ccuk(n ky within the material are referred to as

  A negatively charged rod is brought nemps4fije z9c.9cdv17k at)ng4q8q u, ar one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod willk 8.z4,qg1c a7 e q9pmtuv49n c)fdsji be charged

  Sphere A carries a net positive charge, and sphere B is neutral. q: wyc.-*lc wjThey are placed near each other on an insulated table. Sphere B is brycw c jw*-l:q.iefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope posi5ctj1e3s)9 rai zrh qns9-o+ rtively?

  An originally neutral electroscope is briefly pw1g fg9/2yj+pav -n qtouched with a positively charged glass rod. /pyf+qgp-n1w a 9g2vjThe electroscope

  An originally neutral electroscope is grounded briefly while a positivel jmalddj(d0b jrej8o )l(f4( 3y charged glass rod is held near it. After the 0) rjdmdjb l(jl( e3(8odfj4 aglass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separfb nyx.a3w ;;iate. Then a negative object is brought near th;ix ;ynf3 wa.be electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed 8.lx z6i pej1uon an 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 path followed by the first ball, strikes the first ball, and stops. The first ball rolls forz1 .e juipl6x8ward, 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 const a7jbtalmb3,814r ,jvrp 1cptant $k$, which appears in Coulomb's law?

  Two charged objects are separazpcd6;i/q )-km+smh *wh36b ouna ;kited by a distance d. The first charge is larger in magnitude than the second hsmq;6- kop;mik/u*hn)iw db 6 +z3ac charge.

  Sphere A carries a net charge and sphere B is neutral. They axbn-g 9cjl2*;bg e v1w9 kh:lzre placed near each other on an insulated table. Which statem2v9bckl1nhw:lbgx - *;e gz9jent best describes the electrostatic force between them?

  Two charged objects attract each other with a certain 0t(h3.lo *aoe4/dkfbt1 ecny force. If the charges on both objects are doubled with no change btoa e1kc4f (eo/0y l.hn d3t*in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive qrb.cc k i /:d/ djkdhpe2o(4,forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual cj d4k /khd,:erbdp2 c.qo/(i forces?

  Two charged objects attract eac 9f fh:(rvb ;-(e+pgoy wcnok,,g)e cph other with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and:gfec( f, e-h;c pkn+wpy ),(gvr 9obo the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a protonj1 im8,hxz:av are separated by a distance of 1.0 m. What happens to the magnitude of the force on the protox:18i hv mzja,n if a second electron is placed next to the first electron?

  An electron and a proton are*)bvjk ak(izr* /7cty separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a j yrk7zk*v ac b)(*/tisecond electron is placed next to the proton?

  An electron and a proton are aa9ev2j,,rzq0j9k82lewla2 a9zj f e separated by a distance of 1.0 m. What happens to the size of the force on the proton 2zfa2kw9 e9je v 9 2 rq0ajale8zja,l,if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of av0xj:smcht0ca, 728e9 s kbza0f rra4 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 t v ,0zafjscc80trx02 r7ks:94mhb aea hree 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 equiltsbcv 0uhw- 2, 7spy+hateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an elep0sv + w b2yscut7hh-,ctrostatic 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 is not b uee7abpga4h+uf r715/sfn.tj -q0w a vector?

  At twice the distance from a point charge, the strength of the electrir ;u co,bynoy.q:a3 -5kuck,uc field

  Is it possible to have a zero elect pe560bt,*wr.wdvn-qhii 2mb ric field value between a negative and positive charge along th265mb*v nwbw- hiidept.,q 0 re line joining the two charges?

  Is it possible to have a zero electric field value between two positi/j22 x*w5b qjw z-lqz/o,bpgz ve charges along z5qowq g-/w2zbzlj, jb px2*/ the line joining the two charges?

  Electric field lines near psitive j9hb +gtrju7ckfy-s )h7m8*vpoint charges

  The electric field shfo33qg u0f c 07ds8ibwd2:t lyown

  Can electric field lines intersect in free sparsf nxz7+w e )oc7fc+5it,u x/ce?

  A solid block of metal in electrostatic equilibrium is pl.2riwilp; p 4v ,wqf4laced in a uniform electric fieql viww.r4 ilp,4pf ;2ld. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters)tfk p) cf;b*q are each given the sam) pkbc f*fq;)te charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a woodem +t fp-ug.jo5n table in a region where a uniform electric f-g.p+5jutomfield is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrosta+uww; -1oqmdk fbs* rn6t/h2sbai 9*y04gfa rtic equilibrium near an electric charge

  A positive point charge is enclosed in a hollowzm9 5o5ip( pvu metallic sphere that is grounded. As9 ppm5v( u5oiz compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductore6bmm2y ee 4i*s in static equilibrium.

State Gauss's law.

  The charge carried by one 1fokyx /yz3w5 tbd o80electron 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 exz10ttrvht4mh 4 9v(d lectrons doevx9vrth0h(mzt14 d t4 s this piece of plastic have?

  What is the charge on 1 kg of -9-biute3t-xy tl .lk protons?

  An atomic nucleus has y fat,i6a*(xwa charge 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 d.-m3 okpm/govalues of 2.0 and -4.0 mC, respectively. What is thepod- g.m/o m3k magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the for ji7b-gwzr 25bg:9lzg xrhs /3ce between them is 1.0 N. What is the magnitud5/bigz37 rr gwxz2s hg-l: b9je of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far m7mglcnvf g*(54uy 6c-5htg yapart are they?

  The force between a c7s) 2oe7psu7* gxw9rt : usk;kijy/ d$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm aclown0c u:nw6* v) nl7part, experience a 1.0-N force. If they are moved to a new separatiowo0*c: n) nwn7lc6 lvun of 8.0 cm, what is the electric force between them?

  Three identical point charges oha/ i*ltz(h 0 29svcj3wf0ejcf 2.0 mC 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 forca0(f hev9zj*h0c ti2clw /3jse which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of8- 6.hbil 01g uewyvwz9egth)ri z/2f +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 the magnitude and direction of the electrost-6ehwb80z) v w9gi2f.y 1erz /uightlatic force which acts on the charge at the origin?

  Three point charges are located at t we)a34jj+q *3qol ie7tvs7keb,; guwpe:4qthe 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. What is the magnitude of the force on th eo7*;qq e)vkj43wpweuj37eb: is la,qtgt 4+e 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, ataznx4+ml66-o 07)ocegv e h snd a second point charge of -Q is placed at the upper-left corner. It is observed tsa 7vel0 nx6o )th e4mcg+o6z-hat an electrostatic 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, 0); Q2 = -1.0 nC is at (0, 8 i yeglc/1-nf36cfrkd/t8 jp0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 ntd ycf8 jlp8rk n -1igf/ce63/C charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 =+n ,gnr4hrys7 yd4sg-n3,ch ; )rf rki -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is thngr r4hi,d g+-3nr f4yknc,sy rs7;h)e direction of the net force on the 5.0 nC charge?

  Three identical charges 8(vd( 6qvfjmdof 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude o8qfdv(j(vm d 6f the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q vr o99fs2 rsz4t8j)d uand +4Q, which are 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 on it wvr sd4u 9j28z 9)otfrsould be zero?

  A +3.0-C charge is atze54 b09vgfry the origin and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge9yr5 vbg40ez f be placed so the net force on it is zero?

  Charge +2q is placed at the origin and c 9pha9bd t +2zs4.stynharge -q is placed at x = 2a. Where can a thirdah2n p 9.ss +y9zbdtt4 positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. -u;ldkms5ks ; 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 the attrax 9u dqm1)mc.xction of a fixed proton some distance above it. Homu1x c)9x.dqm w far above the electron is the proton?

  Two 0.20-g metal spheres are hung w r,ek3wujdxn +j .6+yfrom a common point by nonconducting threads which are 30 cm long. Both djyr+w,w6+kxej3nu. 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 +40e. What is the magnb14s++d9ncv41; hw bzpcd z oaitude of the electric field at a distance of 1.0 cb+dsbdh4+p;1 c1 9onza4 vwz m from the nucleus?

  What are the magnitude and direction of the edyu: 0ofpq1z i1e0hf7lectric field at a distance of 1.50 m from a 50.0-nC c7 1hz:py qo01fud0if eharge?

  A 5.0-C charge is 10 m from a small test charge. What iswq yulh-6( ,tz the magnitude of the electric field at the location of thhu-lywq t (,6ze test charge?

  A 5.0-C charge is 10 m from a small test charge. What pahv1rk) *eq3kyq (4tis the direction of the electric fiee) 1hpvatqk3* kq(y r4ld?

  A 5.0-C charge is 10 m from a small test charge.0/u v k pbu:0k2v+wtvm What is the magnitude of the fouvu:kp 00mk +vw2 vb/trce 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 C and are separat ean(*d465 eig3kj yuaed by a distance of 4.0 m. What is the electric field at6giek e 3(d*5najua y4 a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick aub/ *0j ml. *j+8ra fyx7bxuzond a -4.0 mC charge is placed at a*myz of0/r7xblx j u.j* b+u8the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a me74 r7s5ygpd ctter stick and a -4.0 mC charge is placed at the 50 cm mark. At whagt 7ypsr754d ct point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mCmhw6:/db fzpn7b ab11 are placed at x = 0 and x = 0.20 m. What is the magnitude of the electrimdpa:/1h6bzn 7fw1bb c field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Thevoq e7flclqwsm6m5f- up,(- 0 last corner is occupied by a -3.0 ml epl7-c osv (m0 ,ufwq6mf-q5C charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Chargtob mn n7q+s jiokb7-)+v, ;ujes are placed at the 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 of the electric field7 +ibnsj) u7+qj-k t;ob vn,om at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a unifo *b sk68hoyv1prm electric field. What is the magnitude of this electric fielsy8khbo 1*p6v d?

  A particle with a char0wsnuyt)(bz 9l :pq-wfm6,ou 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 an electrio7l7c 5ppx9 fac field of 6000 N/C pointing downward. What charge must be placed a57f7o xp l9pcon the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.5imbf0p0 yx1 e00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direci5xfyp m00e b1tion of the electric field?

  A metal sphere of radius 10 cm carr fiwb 6le5g3p wr(8et:ies a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surfac(tiee:8 6f p5w3wrlgbe?

  A metal sphere of radius 2.0 cm carries a charge of y jkr+cj 8000hea egi33.0 mC. What is the electric field 6.0 cm from the center oi8eak y 0eh 0j3r0gj+cf the sphere?