State the law of conservation oju(w socv;w*-f electric charge.

  Is it possible for two negative charges to attrx3 aca- f+8 mcb-s-o;s;qlei. ul9qzjact each other?

  Is it possible for a positive and a negative charge to attract eac f(q.-plb zrhl2x2/gnh other?

  A glass rod is rubbed with a piece of silk. During the prof1u/ qs r)yok .o/kw(rcess the glass rod acquires k/srfw ooky1u(q/ )r.a positive charge and the silk

  A proton carries a

  The model of the atom sho62r8 pg201wu nnj4q f 85wb.imgpymdows a

  A neutral atom always he x rl;c7,8prpas

  An atom has more electrons than protons. The,+ .zf dmn8idhlh /o)+onx uw1 atom is

  Materials in which the electrons are boun+- 8u oza-xxss 2jt jqrq/p:2nd very tightly to the nuclei are referrus/xatzo-jrsn +p2 q2q- 8: jxed to as

  Materials in which the electrons are bound very loosely to theq2ocr1uljqnh 5+y(6 25 xvyyh nuclei and can move about freely withinvoh 5qlcu2n2y16 5rhy( j+xyq the material are referred to as

  A negatively charged rod is brought near one end of an uncharged ); zjr5u 6i 4qy-vgnxuia2v2s metal bar. The end of the metal bar farthest frj6zu)5v2g arnqi i-;4vy u s2xom the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. Theyj- rjmlf-18y0 (ehyuo are placed near each other on an insulated table. Sphere B is briefly touched with a r01ljhj(yme8f- o- uy wire that is grounded. Which statement is correct?

  How can a negatively chbwan z (* *thr6wxuoo )2wb29yarged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positivelmyd58 jx q7byq.j.4bby charged 7xj q4 b5bd.yq mb8yj.glass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively cha lf;e**+lx+vb r3g6iude9v xe rged glass rod is held near it. Af*+ egx3;vi9x vefu+*le6ldrbter the glass rod is removed, the electroscope

  A positive object touches a neutraliop;5ii3+g 3 it p.hbj electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to thig; hij5+3 ip3bip.ote leaves?

  A large negatively chlep8q*4 ckh9 uarged object is placed on an insulated table. A neutral metallic ball rolls straight toward the object, but st* u8k4qh9 pelcops 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 negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constalkb w3(ef n2l2nt $k$, which appears in Coulomb's law?

  Two charged objects are i2+a 3 qm08bjgedp-cg separated by a distance d. The first charge is larger in magnitude than the second cceapgd3j2 mq-bg 8+0iharge.

  Sphere A carries a net charge and sphere B is neutran (3 2::xz y)pb5vwyqtfnrrs q;ui0*q l. They are placed near each ot5nyrf*vr2py 3 nbi z t(x;q:wsu:0q)qher on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each oth) )n;sqlc r,mter with a certain force. If the charges on )ltm;,src q)nboth objects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d andy7ygsztfwuo- b /q ir: bkv6-/ (u1p9v exert mutual attractive forces of F on each other. If the charges are separub r1yi(t /v/kuw-g:z9- vfsoby p6q7 ated by a distance of d/3, what are the new mutual forces?

  Two charged objects attras7o dgxevl w(7ne), 6nct each other with a force F. What happens to 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 forcevx7ls(,e7 n)6d eogw n is now equal to

  An electron and a proton are separated by a distancel 14:e2 c2zpoeo *aiwv oog2u7 of 1.0 m. What happens to the magnitude of th721u:o4ag oil2e*co pz 2owvee force on the proton if a second electron is placed next to the first electron?

  An electron and a protwua f*, o5t*x pc jr9 b+ vqasp7sl-w,a.*rkm2on are separated by a distance of 1.0 m. What happens to the magnitudastw*s *c kjfx+rqo9 vub7. wa p2-pa,5r,*lme of the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distancyp4w m2o00d;m)be egm7 fux8 qe of 1.0 m. What happens to the size of the force on the pg0fp be)w80emqym; u 2xomd47roton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is plac7p7yid *nd9 peed at 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 positive charge at the center of the 7i9nd dye 7p*psquare?

  A point charge of +Q is placed at the centroid b ct. cu3;q t4z8r/uzhof an equilateral triangle. When a second charge of +Q is pl.t4 8bucr;q u/hzz3c taced 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 the center charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is n nwaa yw-6fs;7ot a vector?

  At twice the distance from a point charge, the /q ;a--ymxv6c-c9hyfuw3pj u strength of the electric field

  Is it possible to have a zero electric field value between a negative and positi,a le 1af7qemwb,n*5cve charge along the line j5c*71,m ,eq nw alaefboining the two charges?

  Is it possible to have a zero electric field value between two positive4y e 9n*p6qcn9 k*raqp charges along the line joining tp eac*k9 nqq*py6r4n 9he two charges?

  Electric field lines near psitive 9yvqlc*i(f z 9point charges

  The electric field shown e+o7 0ko)v r;a,,4a azoegxpw

  Can electric field lines interse1(hf1 yeu8j )rng65 vucltm:zct in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uni 5; zla;ou5jb *k/4q:r; khwn qg;afcwform electric field. Give a statem 4a/cu:aqbw;o;zqj5 k;fgk whn*l r5;ent concerning the electric field in the block's interior.

  If a solid metal sphere and a yc-vp uqxa gw;j5;t10hollow metal sphere of equal diameters are each given the same charge, the electric field q; x1ta5c -upy0 vjg;w(E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a uniform e ;qa q9b78dj1-26*cebozgyrsvnbgy8 lectric field is directed straight upward. What can be said concerning the charge o* dg-;c 1 8bbz9268 qsyvrqjgna7yboen the block's top surface?

  If a conductor is in electrostatic equilibrium near an electr83k.2as afx jz3dy 1hiic charge

  A positive point chaqpbrb0.r0f(8 au2)0slfi t strge is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphefsr0.t 0)b aqpsf(2b0 8itlurre has

State three properties of conducp d i8:54-qey crk6gql vzqy63tors in static equilibrium.

State Gauss's law.

  The charge carried by one electg z;r( -g ncu6m e-cvq;4kfyg3ron 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 s gh;u,zbm)k;+2.00 mC. How many more protons than electrons )zgbm ;,s;khudoes this piece of plastic have?

  What is the charge on 1 k8du/f gu1 ao8lg of protons?

  An atomic nucleus hass (qfeqhkgmw+tc4d*8+fcn7 , a 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 valu pwvl (6fsirl:qb6 ,q2es of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force bfqsllv pw ,ir(6:26q between them?

  A 1.0-C charge is 15 m from a second charge, andd.o.qy8l;p hl2enwk h jdg +7.vl0d9e the force between them is 1.0 N. What is the magnitude of the seconhqoy2;j+h. dlldg w9v pld.e .7 0ne8kd charge?

  Two 1.0-C charges have a fgx to.cet);9fadk. vz0w n/ 2rorce between them of 1.0 N. How far apart are they?

  The force between a xanl;)fp9rem;ao - a:$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apaj1, e /1- cpqp: du0nsqvmrfm4rt, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the qmr1fj qm: -/cdvp pe,s 1nu40electric force between them?

  Three identical point charges of 2.0 mC al n.w zrmk/lnl-(1 ku4re placed on the x-axis. The first charge is at the olwulkn1r/.(m n4z k-lrigin, 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 +2.0o11.o3ff+ +3vkk q bev k(ndru 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 electrostatic force which acts on the charo rkkv3b e+vd3. fnk1oq f1+(uge at the origin?

  Three point charges ar vqx8amaiqm49p1c3 p +e located at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at pa8ix31mc 94apq vqm+ x = 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 placed at the center of a square, and a second poi :o7e- )vkfa5a8qlr*x(tvc ysnt 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 xo:t(syl-85 arvae7)q*f cv k 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, 0.1ir,kg0ltr9, g0 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charitrk,0gr,lg 9 ge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.1ospxx 1)c y5 b*u7 vth8jpyg,sb3ob14 0 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force hbg c svoj xb o 48y*txy)us,13b1p5p7on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of a xiv;32hh qtx8n equilateral triangle which measures 30 cm on a sixi2;q x8th3vh de. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, h7w 0z2*tuac),l kbawwhich are separated by 3.0 m. At what point, on a line 0lwk7a,2zwu ) *bctha between 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 +9t5:+jjbdm 3qx6l- uj aj6 cm2m.0-C charge is at x = 4.0 m. Where on the x-axis can + 2amdjjbt3:u6qcmxj 5ljm- 6a third charge be placed so the net force on it is zero?

  Charge +2q is placed at thelq*wlkv(da bxd ;:z 1. origin and charge -q is placed at x = 2a. Where can a third positive charge 1;b. :(z*daxdllqvwk+q be placed so that the force on it is zero?

  A copper penny has alp8 vx:h8 b*7 1j9gcx diuqxy8 mass of 3.0 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 forceq,qikyk*mzm0l5f u*z h8)vpk - r *qc0xy),uh of gravity by the attraction of a fixed proton some distance above it. How far above the electron yx,kf-q* h5mci8um )0vlkz)kz*pq,hq0y *ru is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting th dy.0ya*g 7genreads which are 30 cm long. Both are given identical charges, and the electrostati.ng*ygaey0 d7 c 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 charkhp7,8aemx q)s qqk7(ge of +40e. What is the magnitude of the electric field at a distance of 1.0 m from t,p)km7 a s7hkxeq8(qqhe nucleus?

  What are the magnitude and dio(hl7w mzw;m)rection of the electric field at a distance of 1.50 m from(;mmoh 7zlww ) a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnity lhn gtv7z)j8w.: p(oude of the eletl)ojzh(8p:g7nyw. v ctric field at the location of the test charge?

  A 5.0-C charge is 10 m d2mq x,0ta5ypl ala80from a small test charge. What is the direction of the elec aymx,pta d050a ql82ltric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude ofj2o: p+oysa y8 the force experienced by a 1.0 njo y2+s8o:pa yC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and a7s;ift3:9n: xfqfw saip -2lk re separated by a distance of 4.0 m. What is the electric fiefkpt;s9lns :wx: a7ff iq3i2-ld 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 7 /nnwqxljbsk * *t68zmC charge is placed at the 50 cm mark68j xqkbsz*ntnw 7l */. 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 stic et-rq3mqwn:,u+g3c yk and a -4.0 mC charge is placed at the 50 cm mac tqmy uegq3w3+rn:- ,rk. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC )d:l4u w*shtnand -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the poinws t h4nl*):dut midway between them?

  Three 3.0 mC chargesrz/vm* vwr 87s are at the three corners of a square of side 0.50 m. The last c8vv7rw*r/z msorner 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 onz4+o7cp9sx ,. omcrnu a side. Charges 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 field at themccr.4+,z9sxon 7 puo square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placgd tujv*vd h2;uv8c7,w6; onced in a uniform electric field. onvcvd8c u27wd 6gjh vu t*;,; What is the magnitude of this electric field?

  A particle with a charggy,fibrobgk 3os7 (o1 jm+3 1ae 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 ofw c+c4bjbnc6dtnt .yi 30 g8k1 6000 N/C pointing downward. What charge mustccjc46n3b bn8 +ywg0t1ik t.d be placed on the ball for it to be suspended?

  A foam ball of mass 0.150utk f5q7cr:2ps /ulx :r :6uav g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suk uu/ p::sftlvc5a x27rq6ru :spended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of rad14s npsz.ftc6nuum;a r-u d31ius 10 cm carries a charge of +2.0 mC. What is the magnitude of the el1at;4upms d 3nzc6fuus- .1nrectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 jed 59lilv9hffuxa 7 kp45z0h i7g*-fyj*f,qmC. What is the electric fq509ah*d*l 9z ixuf 4fvl7j5hfpiy-jeg7 ,k field 6.0 cm from the center of the sphere?