State the law of conservation of xk 3obkds ;6, oct;ne:electric charge.

  Is it possible for two negative charges to attract each other?l7k(gb c,mfqmcv 8i65

  Is it possible for a positive and a negative charge to attract eajaw3;q;27dyx og;u qich other?

  A glass rod is rubbed with a piece of silk. During the process 0ba f1hq/6n(+jd qvgq the glass rod acq( qbf h01 dj/6gavqnq+uires a positive charge and the silk

  A proton carries a

  The model of the atom sho4oq*xt/c bq h*ws a

  A neutral atom always60jr9c7jpa7 sn9 siiy has

  An atom has more electrons than protons )n+8d-qrdh6u0fwm eh;5 qzoj. The atom is

  Materials in which the electrons are bound very2 k)n z7yy/itonelr0 n2,te- s tightly to the nuclei are referred t zosy,-ny2n)k7l/ e t2ni0r teo as

  Materials in which the electrons are bounlnfjij 2-bnhvc u ; f6ze+e087d very loosely to the nuclei and can move about freely within the mate2ufn jef-;i7j0n b6+le8z hvc rial are referred to as

  A negatively chargedxqe0ipyka6w sm(0+u) rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest frxwei)( qyap+k0m06su om the charged rod will be charged

  Sphere A carries a net positive charge, and spherr c4e007wl9c vjdf eawg3 r44q7i7*c1tpkz fte B is neutral. They are placed near each other on an insulate4 4lw d 0awqrtcrci47jk c9*7pefe0t71fzv3g d table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscoebrea1 cf1on4igj /;f o-bn- +pe positively?

  An originally neutral electroscope is briefly touched with a positively chargvd,ug 0gm7z/kt0tsf 9ed g07z vgk,9f gu0mtdts/lass rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively chayx9i)bh7ri :1iu nx2c rged glass rod is held near it. After iny b7i 9ru:1ix2h )xcthe glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separlb 34,5thx+hgqt9nl* p 3m pjhate. Then a negative object is brought near the electroscope, but doesm9lh 4 +njpl,q htxbhg3p*t35 not touch it. What happens to the leaves?

  A large negatively charged object is placed on an in.44cqvzcii co a+:/ , -if folsnd-ft-sulated 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 /o--4+,oqsf4-ici c a :.idfv fct znlfollowed 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 Coulomb02kevi s8 cx.v constant $k$, which appears in Coulomb's law?

  Two charged objects are separated.l 0z3vm4.,m ok lzgaj by a distance d. The first charge is larger in magnitude than the seconjzll0m,g3 m.a4.zo vkd charge.

  Sphere A carries a net charge and sphere Bb az )/dkb*s c a h9mzv:avf61*e:,klr is neutral. They are placed near each other on an insulated table. Which statement zk 1vdsl,r/h:zfa)v *acb ek6ma *9:bbest describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the chary;/se ) a:vpygges on both objects are:)e;s a/gvpy y doubled with no change in separation, the force between them

  Two charges are separated by a distance d /wd)p (kf. l)gum- cb/izv a3kand exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mupc3wzbid.)v)akm/l k(g f-u/ tual forces?

  Two charged objects attract each o* a oe4f61cfxhther with a force F. What happens to the force between them if oh1f6efoc 4*xa ne charge 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 distance oysq 8.-btfha775m*jxund y8 nf 1.0 m. What happens to the magnitude of the forcfmsd-yb.8 h an ty7q n8*7xuj5e 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 91(foe) lz-g 1c(- l n;nwom*bfemhuh1.0 m. What happens to the magnitude of thelobh)oh-u1; 9*czm m(1-wfflg ne(n e force on the first electron if a second electron is placed next to the proton?

  An electron and a proton ar20t l+ meqx)kye separated by a distance of 1.0 m. What happens to the size of the e0kx2m+q)ytl force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at k)( w 3antlbz6la;lwk;7g7ugthe 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 glb37za lwn6 k;wlkga(u7;t) 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. 9.9q:.nddo jpaahs z,isknu) q18o3 j When 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 the center charge due to azshjdoq n3j 8). qk:uoa, n9 isa9d1.p third charge of +Q placed at one of the other vertices?

  Which of the following is jna,m4k x9nq p,wbh),ot s/p0not a vector?

  At twice the distance from a point charge, the str4luel97ytbw.hfv8ch w e j.,6ength of the electric field

  Is it possible to have a zero electri4 vkvbj;/q i:e7ov)roc field value between a negative and positive charge along thk;v7 veq)r ovoj:/4ib e line joining the two charges?

  Is it possible to have a zero electric field value between two positive chaz-:imqplj j 58n2vh7 frges along the line joining the two-jf p qv 8nh2j:zmli57 charges?

  Electric field lines near psitive point chargesm 07 2 s8nv3t1tinowmt*nu3rh

  The electric field shownc1 5 xbld+/svp

  Can electric field lines interseccoy 0.5+d bzb+ktv7 xut in free space?

  A solid block of metal in electrostatic/ 7tvj0htffl00 babc( r4irr7 equilibrium is placed in a uniform electric field. Give a statement conceffthvia0b rrc47b7 0t/j(r 0 lrning the electric field in the block's interior.

  If a solid metal sphere as: vpg8 gq2i3 * er/hueps+le1nd a hollow metal sphere of equal diameters are each given the samehqeepg u8ls+p*s 2r1: i3/evg charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a woodq2l+3nf 7 lugken table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge onkf nqu+l237 gl the block's top surface?

  If a conductor is in electrostatic equilibrium near 8dxic n0dc9h775 c 5xvixkc,r9phj- t an electric charge

  A positive point charge is enclosed in a hollow metallic spherems mx. kpdn9/: that is grounded. Asx d/k9:m s.mnp compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibriu+do uuh: .ovr3h 8:yuwm.

State Gauss's law.

  The charge carried by one electrj+4ab;h, 5,inb -*fq qqethzkon 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 prot.9xrl.x2in jdons than electrons does this piece x2n.. dr9i xjlof plastic have?

  What is the charge on 1 kg of pde(a* zru9k4pgw4;l v rotons?

  An atomic nucleus has apa gf6w, c;tg3n n whng92s/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 values of 2.0 ando3b6 wzs*sggtrho)m+n 8 :q5y -4.0 mC, respectively. What is the magnitude of the electric forceqgywh56)o*rs: 83m+sgtnb zo between them?

  A 1.0-C charge is 15 m from a second charge, and the force between ihlnmi trz2 ;y1 x;0p5tt0z2z them is 1.0 N. What is the magnitude of the second ztm5 1iy t0niht2zz0;x r;2lp charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart ardkfam 5qqzy y7 +cad x56c x4f*1gj6y,e they?

  The force between a zvsf-m q* ub.k h6l9woh:v a974h9pfc$30 \; mC$ 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 forc5yf m7hjv ave;q0pzcrq.)w :,e. If they are moved to a new separa. ; qc7,wa5mefj vr:y qvh)pz0tion of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axisp eg4-nb7f9z i2l 8qbu. 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 whin-l8 buef 4gpi72zbq 9ch acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is pq bfrt d44jjdr 1 u;nj:j:b f8b5izx43laced at the origin, j:rf qf4jdzbbjtr4 ui;51b348x nd: j -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 charge at the origin?

  Three point charges are located at the followi kp31rn e. v4on8g8up(rq3jqgng positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at evuoj q3pgn1 r gkr8.8 np(34qx = 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 point chatfjdi r0cm i72.4qy 6qrge 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 the center charge0q mctfdi2. q4j 7iy6r 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 ad 8wvc h08vy5m); Q3 = 5.0 nC is at (0, 0). What is the magn 8vycw58a0vdh itude 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 at -j9 dzs0ryg.g(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direj9sg.dg -zr0y ction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an evd*v yb7v/. f;fg;qnq quilateral trian/; y7dnvqbfgv* f;q.vgle which measures 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 and +4Q, which are n i)qaqg/0 e-yseparated by 3.0 m. At what point, on a line between the two charges, would it be possible to plac/q0 n) iyqage-e 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 chargmc: i4s/n0ro) z5 upi l(fx0h+ upd 4t9tgbl*be is at x = 4.0 m. Where on the x-axis can a thittx ud)ufp/ o5bbi(+p9l 0 0gch*i:nl4ms4rzrd charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and cha.:m0r0-xnfgpxus5/; p9l8 ax h rllplrge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the forcellnphpgm rlx/;0rf.lu5p -x ax: s809 on it is zero?

  A copper penny has a mass of 3.0 g.fao : *toc)wwmf .n.*n6n0xl w 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 attraction of.8h,:qi 8ae,; i5rr1hsyi bocerqlw0 a fixed proton some raoe5q8 8rs1 eyl ii,hbhcrw 0i,;.:q distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheresdes (fz gx/n8xn)j6i 9 dze93k 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 x n/zdg 6f)e8(dxs e9nkj9i3zis $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnitude644 mo3u-uqy c)gr0jh m95i2vebk /uz.enerx of the electric field at a distance of 1.omr5 39 e /v.x4hg06er)ze ukmqubc4- iynuj20 m from the nucleus?

  What are the magnitude and dirt/-1d gac xc(;4y ihhkection of the electric field at a distance of 1.50 m from a 5 kcd (;iya4 t-gh1xc/h0.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudec g,wa zf93xgguxf6i+4k lk0 : of the elecgzk9 g6+k wlga c0uf:i f3,4xxtric field at the location of the test charge?

  A 5.0-C charge is 10 m from a sq6 (ptdugq6 y-/cezg41 qsm 2xmall test charge. What is the direction of the electric fielgmucp q2exq/d1( t4gq z-66ysd?

  A 5.0-C charge is 10 m from a small test /9u okiq,qt/j charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at tok,// qjit q9uhe location of the test charge?

  Two point charges each have a value of 3.0 C and are separa mqzxu9 c7m vh;,y2:;l-ztkae0k .yubted by a distance of 4.0 m. What is the elzmu,tc;m7;k -9l qux.y0yhv2:b ke z aectric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mar-qw)r 3 kib)l(5z yfrik of a meter stick and a -4.0 mC charge is pla rlyfi(-wqi 5zrk)3) bced at the 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 meter stick and a -4.0 mC charge4-fmmx 9 +p0t;omcwf+b:7 xdji- guwu is placed at the 50 cm mark. At what point on a line joining thmbx f- wm jm:t4u9icfpx w;0++dgo-7 ue two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are plac46xo)o ,d srjbed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the pointr)4s,oboj 6 xd midway between them?

  Three 3.0 mC charges ar eaj+ f8c77-qv lzz+/lpsho+we at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the squaj lshpze-7olc v+/ + 7f+w8qzare.

  Consider a square whicsyj1utgyzl7)2zi-s wni8( h +h is 1.0 m on 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). Wha1yy8j-s +i(7t nhz 2i ugwslz)t is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 +q)ax)/enywk5wr8o js/ t0mnmC when it is placed in a uniform electric field. What is the magnitude of this e k we)mn5/8nqrt 0yosajw)/+xlectric field?

  A particle with a charge of1du voh;n8tbbxu 56gkai v/(+ 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 0.12v ;c /-v4bw (tnjlgkr70 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspend/(r7g4wkv ;t-l vbcnjed?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball lgc yisg,q*pwu.8 3mdqvt.3 t140n h/cky 8yfis placed inside a uniform electric field, and is suspended against the force y8gnwustc 3kqt, d1gv q c.l.08yfi/pyh 3m*4 of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a6.(jq wrl1s9kwo t ya+ charge of +2.0 mC. What is the magnitude of the electric field 5..ws16yt rwja(lkq9+o 0 cm from the sphere's surface?

  A metal sphere of radius 2 g2p esy0w-d(1l- z8c h6mqmyu.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of mzl-yu dchpeyw s1- 826qg(0mthe sphere?