State the law of conservati m1xkpha(o0q, on of electric charge.

  Is it possible for two negative charges to atyf pa9i hs.rtvef q1b 2l:g0q aj),47ltract each other?

  Is it possible for a positive and a negati;ehg1 : uuih.jve charge to attract each other?

  A glass rod is rubbed with a piece of silk. During thual7 xskzdu ;h7k 8*ph9y yr,8e process the glass rod acquires a positive charge and the si 8dpxs9*y lz r;a7hk7,u h8uyklk

  A proton carries a

  The model of the atom shyz*)iutn 8 q8 u3sjcu r8x80fwows a

  A neutral atom always has-s*+giyza2 dk-ca rn ig4-wh.

  An atom has more electrons than prot)yxqsq:x3r0x-kp) f98j t cdsons. The atom is

  Materials in which the electrons are bound very tightlyreopm :+ 7 :s:pkassy.s1wso/ to the nuclei are referred to:+m.1:ro 7ksa w/s:se opsyp s as

  Materials in which the electrons are ukl .pd6is*,gbound very loosely to the nuclei and can move about freely within the material i6u.lg kpd*s, are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bark/ced)co6+ q a. The end of the metal bar farta/e )+qdc6kco hest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral.wuakr q c*++ipt7/3nh They are placed near each other on an insulated table. nh7 kwpc ar+t u+q*i3/ Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electrosco 8vw)he 5cu)p(bu7e,a z;rnxdpe positively?

  An originally neutral electrob4yp1jwj6 )7guxy2) a p+w* u:khisog scope is briefly touched with a positively charged glass rod:+h *pg1ywiu xy abujk)2g ojp6 7)s4w. The electroscope

  An originally neutral electroscope is grounded briefly while a positively charg;xu35)ncqb5eep o le3xc:os7ed o )qc53:xu5s pbecneoel; 37xglass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and k+qx 5a8e;nl- r+lv, rvvpn +tthe leaves separate. Then a negative object isa+e-,p rxnlr; tv+n5vk q 8lv+ brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged obhayef2as t.+)u.b jf -98exmoject is placed on 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 t- o ehmsbt.)u 89yx.afeaf2 +jhe 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 qy9bbvagdj am2:. *8d the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. ce3 b6(mb,lq 6yq9ih)djcscm-+j 1pf The first charge is larger in magnitude than the second c)m cpjiq1s3,jflq6 yb(e9c+cb-dm h 6harge.

  Sphere A carries a net charge and sphere B is neutral. They are placed nen 3i)x c fd91khlxl5q4k mlw32ar each other on an insulated table. Which statement best describes the electrostatic force betw41w9lckx3 lm3f ki5n2xqld)h een them?

  Two charged objects attract each other with a certain force. If the chargqew2os9*1er d 58ro qt*3dzd fes on both objects are doubled with no change in separation, the force betwe935t 1r82odfq seddorzw **eq en them

  Two charges are separated by a distance d and exert mutual attractivyko5qk qv 5;rplg2 *k,e forces of F on each other. If the charges are separated by a distance of d/3, what are the new mutual foror5q lqpk*ky,v 2k g5;ces?

  Two charged objects attract each otherj1b hr.el :m*xtga pp/u1*f.0o ocub; with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, an*o .ucxpm:gf;. ol1j1rpt0ue hab*/b d 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 disl1k. xw l8t5oytance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the first electro51x8o lylwkt.n?

  An electron and a pro( z5-8kdytq cudvc -,w( gczg go-pb9(ton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second elec9(c -dcupb, tv ( -q z8kyggodwz5-(gctron is placed next to the proton?

  An electron and a proton 5f/7qqd 5+uk6 vbbadfbw8ju: are separated by a distance of 1.0 m. What happens to the size of /q5 kv6 :8u w+ dbj5ua7bqffdbthe 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 a*,ho l5k ue(cg second point charge of -Q is pl(,lgkuohe*5 caced 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 square?

  A point charge of +Q is placed at the centroid of an equilateral triangle.e9f z9i,4: -ke 9t0fgw)n zdglppps/p When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4.0 N acts on tp pff s/g4p,:eid)k9l wgn z- 0p99ezit. 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 de cb6-owwa ,6zk0z1fobyg3iv*a6 not a vector?

  At twice the distance from a point charge, the strength of the electr4n(( . pf 9j)oqqnpgp8hhx2 gdic field

  Is it possible to have a ze; b8l*fhf8ps z+lvu,r;3raxi ro electric field value between a negative and positive charge along the lizfx lrrsa;;lu, ib8v3 h+8pf*ne joining the two charges?

  Is it possible to have a( df5irdt7bk6 zero electric field value between two positive charges along the line joining thedt76i 5bkd(r f two charges?

  Electric field lines near aazg1+gy3 )ohpsitive point charges

  The electric field show dch*9 e;ud dobts950pn

  Can electric field lines intersect in free space0mx3.(ifsav p+w2hsk ?

  A solid block of metal in electrostz;za.kzm 6*h6skr x8 jatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's interzr mk h6za6 xz*k.j8;sior.

  If a solid metal sphere and a hollow metal sphere of ch(j*lz (f,nfre;3 hjequal diameters are each given the same charge, the electric field (E) midway between the center and the surface isfn(hhrzl 3 f;c ,(*jje

  A cubic block of aluminum rests onvl*(dym5rp (5o i ws7q a wooden table in a region where a uniform electric y l(m7dp5v w(osiqr5* 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 near an electric chargi97 9vh q 3ll4argz/dze

  A positive point charge is enclosed in a hollow metallxhmmc/1j;i 7f v.ium) ic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a )1/fvmc.h;xijm7i umpoint directly above the hollow sphere has

State three properties of condutd 0/tjrss td 7x;8ce8mwq.qo+ :tkw/ctors in static equilibrium.

State Gauss's law.

  The charge carried by ocf/q+d*xd8j lne 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. How many 2)mc e 9bb80siqy,wa vmore protons than electrons doe28 ,bvy 9iemw cbqa)s0s this piece of plastic have?

  What is the charge on 1 kg oak64k 9c u5boof protons?

  An atomic nucleus has a charge oc+oq qhe/v)82wrx k*q4 e,tu 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*jcoqvsbu9ye9 -l ,w+-e /rq gpw /e)e charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betweyq9--+s,/ovwepr el )qb *ecj/ uwg9een them?

  A 1.0-C charge is 15 m from a second charge, and the fo f4yw57 0z-xpmtt/l oqrce between them is 1.0 N. What is the magnitude of the slp/yw754fmt-0tq x o zecond charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are theyo5f pr,) rpmuq21 .k e7jirkf1?

  The force between a b3u13ru l. e,7foukie$30 \; mC$ 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 fm 7f6o ww p8((gs bf0iy8fd-uforce. If they are moved to a new separation of 8.0 cuy8f7i-8 mbwgf (d sff6ow0 (pm, what is the electric force between them?

  Three identical point chargb/ etln )oh8.2xsh,gwes of 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 force which ,h 2 go8/sxt)wlbh. neacts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed anqqsud-(r4:r)7 foo ct 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 th- 7s uq4)qoco(d rnrf:e electrostatic force which acts on the charge at the origin?

  Three point charges are located at the8n17r4*; ; uwkr6wl fiactjbeqg h./w following positions: Q1 = 2.00 mC at x = 1/ hnirk7fgbr;8tq eua1. w6l *;c jw4w.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 the 3.00-mC charge?

  A point charge of +Q is placed at the center of a squarepu:5 bo1lz+ rv, 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 on t rvu z5o:plb+1he 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, 0.10 m); Q3 1n :* tv;r-pshnk2a+mnbj r.h = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charge?j ;shnrkv-. :pntb 2nmh*a+ 1r

  Q1 = 6.0 nC is at (0.30 m, 0); Q2wq8 r - eslg5w4 ldueuc++u47k = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC chakelsc+ uudu58- +gww e qlr447rge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateralp h6vt/n 9zrhd u8q)5t triangle which measures 30 cm on a side. What is the magnitude of the electrostatic forc u6 vz /)ht9q5hp8tndre which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separacb /gvat(u ;uyfz *8q7ted by 3.0 m. At what point, on a line between the two charges, would vca7qzytfb;( 8*uu/ git 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 charg*wn yb1r )vx;qel.,zme is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is z yxv.r ln *,;em1bqzw)ero?

  Charge +2q is placed at the bt z eu- 67z7msn5 (xsiveg/f0origin and charge -q is placed at x = 2a. Where can 7xvtes0/g7 (fbu6 m-ns5 eizza third positive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tot 7 2y5 kob;uatib,ixcjxf)jr* 4f xblw639mu (al 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 fo)c9 qhdqjm3,9 e-ay m :1pcptg vm05wprce of gravity by the attraction of a fixed proton some distance above it. How far ceg 0tm3vqcy )pm95:hp p9 a-md,qj1wabove the electron is the proton?

  Two 0.20-g metal spheres are hung from a com(l1 */lq8qczpmow pw-) g6askmon point by nonconducting threads which are/ww- 1qg8(a k)mp loqp*l6c zs 30 cm long. Both 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 magrar9yg3 0(vb i*0 /boyav1fl anitude of the electric field at a distance of /*(bfa1loryar0 vb0vy ia g931.0 m from the nucleus?

  What are the magnitude and direction of the electr 1nu,p4ziyru56n9v8 u b.gfggm ,(kkwic field at a distance of 1.50 m from a 50.0-n9up5gk u6 n,k4f1zviw.g(r, gby8mun C charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o y -km6/c:t)zzdh3ir tf the electht/6 3k rm- zicdzy)t:ric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test chd gf62g,1e8:gyhvi usarge. What is the direction of the electric field? is1 ehuf28gg dv,:y6g

  A 5.0-C charge is 10 m from a sm+ktay5m / no-iall test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location y5tmanik o+ -/of the test charge?

  Two point charges each have ads 9zty41/s*;tfi sx j value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midd xt/fz914tyij*s ; ssway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stickq4c vjo8rn 6p+ and a -4.0 mC charge is placed at the 50 cm mark. What is the electricc8+6j 4ovpqrn field at the 30 cm mark?

  A 5.0-mC charge is plal g )x 2o1w/*byg2,mupvnc28k wz1rbxced at the 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 charges 82wpk,nx xbb mgorw2ugy l/*1)z1c2v is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 utbokb : 6 eae7yt64q1and x = 0.20 m. What isyoe: t1ubb6q6a ek4t7 the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a squar8l;ug +w +kvod aea6(ne of side 0.50 m. The last corner6una+owke+ad (gv l ;8 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. Charges are place xlfsmhzoyw : )63ou.5d 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 thlofms .uoz):w56x3hye 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 is placed in a lxp(.fqp i3seu u.w9 fey40p5uniform electric field. What is the magnitude of tx0u.54(fu.e lewq9 pi spyf3p his electric field?

  A particle with a charge of 4.0 mC has a masse+ovn5m7f25gbu ) e. dc3f hsh 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 rb8nhzpt80. tk :2d2vk zl8jyf -)araan electric field of 6000 N/C pointing downward. What chary 8l:d.tf nr-kt0)8aj2 8pbzak2h v zrge 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 j8 m4 lc3nqm2(qukz;7lqie s7 ball is placed inside a uniform electric field, and is suspended againsti83qe qu4(n 7smk7l2j lqmzc; the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a cha ;kn x q30z4*fe9ewwufrge of +2.0 mC. What is the magnitude of the electric field 5.0 cm 03efxzuk9qw e*;fwn4 from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge o*bz ;o h;v wd2vr:1pb/ppp/jof 3.0 mC. What is the electric oph* z:jr1 ovdppp 2/bw;bv/;field 6.0 cm from the center of the sphere?