State the law of conservation of electric char kumk:sa02() ly k6mrlge.

  Is it possible for two negative charges to attract eutmee9t cy 7t6g6e(-gdi3-k nach other?

  Is it possible for a positiv bjg 72yf fco43b+b1gse and a negative charge to attract each other?

  A glass rod is rubbed wwzsc xnwbhc7d zm l8 suvf9 )vr*th:97.w219z ith a piece of silk. During the process the glass rod acquires a positive cvz7* swh 9vzd91zm lcchnr7t2 fx)b9:s.wwu8harge and the silk

  A proton carries a

  The model of the atom g466j+ 3)i5hcdypny hnlg d.g+hwh:jshows a

  A neutral atom always ha pcn1x:t+a 3pys

  An atom has more electrons than protonp ;jsncc-g qf -i..9fns. The atom is

  Materials in which the electrons are bot9locv q6m3t9bxpzk :6 *rhl- und very tightly to the nuclei are referred to as9xt9: ltbmr6 q3-*z chvkol6p

  Materials in which the electroncy6x,3id pc1 oxf+:mus are bound very loosely to the nuclei and can move about freely within the material are referred t,xif1:cd o6uc y+p3xmo as

  A negatively charged rod is brought near one end of an uncharged metal bar88 qm90p)odsx ca (rcj. The end of the metal bar farthest from the charged rod will be charge 9cq 88xcpjo(m0)r adsd

  Sphere A carries a net positive charge, and sphere B is neutral1wu2:a *8jary noe7k q. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Whic:yq u8 *7o2ar1knejwah statement is correct?

  How can a negatively charc,vc ty:r ,er.ged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched wi vidl8vnvw6w21 7.e9 oage+v :ksn+t vth a positively charged glass rod. The e+wwo96vne1k2ve vsiv d. t+lg87av:nlectroscope

  An originally neutral electrosckd(7v:rqxan 8qqb3 t)ope is grounded briefly while a positively charged glass rod is held near it7 r8d:)b3q(ktnvaxqq . After the glass rod is removed, the electroscope

  A positive object touwrxjo.8.v8xp ches a neutral electroscope, and the leaves separate. Then av j.o8 xpxw8r. negative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutm k/a/r1sglj (ral metallic ball rolls straight toward the object, but stops before ijk (ag lr/s/1mt 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 n qcubtqw9cba 2y)0(- gmc :u2the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger i.ehkj.0khq g:1 xs;akn magnit.1:h .jsxkh ekg;ak 0qude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near eap +6y5hntx jg/ch other on an insulated table. Which statement best describes the electrostatic force between theg5yx +t njp/h6m?

  Two charged objects attract each other with a certa (hprxs194vxq drd( a1in force. If the charges on both objects are double1a (p9 4 1drxhrqdx(vsd with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive fy) +hss+,w ztzxt 6p*forces of F on each other. If the charges are separated by a distance of 6ywst+*,szp+hzxf t) d/3, what are the new mutual forces?

  Two charged objects attract each other wig6g4w.az spd 6th a force F. What happens to the force between them if one charge is doubled, the other charge is tr46dsgp za g6w.ipled, 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 of 1.0 m. What happeqzhgz0.v2q p);egran 6t(:kda ;ip uri4x68zns to the magnitude of the force on the proton if a second electro0xq;. g4rkv ;pat2q 8 izd(z:uin)6z hpra 6gen is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens to t q8oej1q;th h clw;r+k:,uvu7 xgw;*the magnitude of the force on the first electck xuw7;1qh:ehv8ljt; oq*ut,+gr; wron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens totl.,xv cd:wfw(ui/ /y the size of thc(. /tv,:l d x/wuwfiye 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 gc w 8f r;d/bxnpl)n07a 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, icgp 8 0l/xdbfnr7)wn;dentical 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 y ufbb-+ns ;3jequilateral triangle. 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 a third charge of +Q placed y;b f-jnsbu +3at one of the other vertices?

  Which of the following is not 3-g7j 4p0xpn7h tg5w rtx lmz6a vector?

  At twice the distance from a point charge, the strength of the electric fttcisd tc+(q a.a1;gp5d ss40ield

  Is it possible to have a zero electric field value betwee4ykxia7r )6m(of 5o;0iae vhbn a negative and positive charge along the line joining the t0o5 ybf46(;xrvai m ek)o ah7iwo charges?

  Is it possible to have a zero z)o)y/ts0u:yeb+b d c6ry8)z,hootw electric field value between two positive charges along the line joinyoo swc0/y)z ,+ozdeb hur8tb6))yt:ing the two charges?

  Electric field lines near psitzyf: nkg1 g:e77l5q kwive point charges

  The electric field sho3 miot:u: 5;)e6( 8 agwqll-wimiopy lwn

  Can electric field lines interse)6wf7gbd p;fstks //0*usy dect in free space?

  A solid block of metal in electrostatic h8h4/l c2tbi3 ,f+h igil9rbh g4cab/equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the bloc4 lbb8t3clg9hibh/ig hf4 /rih+2ca, k's interior.

  If a solid metal sphere and a hollow mlqx )vb*; ix1detal sphere of equal diameters are each given the same charge, the electric field (E) midway between theix) ;* x1dlbvq center and the surface is

  A cubic block of aluminum rests on a wooden table in a rw9o14g 4t(q nn:d- yp:zrwpbz egion where a uniform electric field is directed straight upward. What can be said concerning nn4dy1wo w:bqgpr9- : z(z4ptthe charge on the block's top surface?

  If a conductor is in electrostatic equilibrium nen*2d)lb)hf 1:n uw/z.blh7 kko6rxzdar an electric charge

  A positive point charge is enclosed io*77yr.m x vm)ioe/z1)i*n ica* v pkjn a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field v* o mcvpr1)ij xnm7/iaoe i.*zk7)*yat a point directly above the hollow sphere has

State three properties owq;h0b4y dkdjmj j-.*f conductors in static equilibrium.

State Gauss's law.

  The charge carried by one el7u(bt15sww n1dv td0i ectron 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 )0rb puhs( oj.more protons than electrons do jsp.0)u(bhores this piece of plastic have?

  What is the charge on 1 kgop+8/2i o-)i/ssymstjbfkv0 of protons?

  An atomic nucleus has a chargeh gz d17 jz(p9q8ew 9bqtv.cx6 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 and -d9gg,t+t*+ wmolq +sl4.0 mC, respectively. What is the magnitude of the electric force between them ,tgto9m*++ lg sdw+lq?

  A 1.0-C charge is 15 m from a second,rek.fnnv6 mt sb .p:lfj3*bswv,6i8lzn1 i 9 charge, and the force between them is 1.0 N. What is the magnitude of the second chbn.n f6t *:evb,v.1pml,68 rj ii93wsf nls kzarge?

  Two 1.0-C charges have a force betwxkw/y,a3pz):l g p 3lween them of 1.0 N. How far apart are they?

  The force between a j)j4l3 :llydy$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, exhfde2xge56q ( d5bw m6perience a 1.0-N force. If they ard266e5( xf5gehmbdq we moved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axi1rdsm *x3jrq 5y1wcv7s. The first charge i *73 1mj5q1w xydsrcvrs 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 a xw3uxi7 ab,fqe:q)h *re placed on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right at x =wfa b* 3ei)qqh7: xu,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 t(d v1. nd hk(ubs;tnp ;1hr/(jf be6vshe 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/; suk(n;fs d.ntjrvv1 b( he p(h6d1b force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second xydfwqd z v+:xhh96 wm-c+4d +point charge of -Q :w hdhf+ dmzv9+4x x +w6cydq-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 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 = 5.0 n8x53fap( ejst C is at (0, 0). What is th5fp8ea sx3t (je magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, /91 5n:klad zq8wtopy0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction onpl9kdq1 y8 z a5wto/:f the net force on the 5.0 nC charge?

  Three identical charges of3p966cpe s l r8mtp/az 3.0 mC are placed at the vertices of an equilateral triangle whicha pm 8 6r3/p6tc9pselz 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 separated by 3.0 m. k ulq6;t8mu -aAt 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 m at8l-6 u;uqkwould be zero?

  A +3.0-C charge is at the origin and a +98x)n: gj4r.1cbq vuoh.0-C charge is at x = 4.0 m. Where on the x-axis can a thhq8oubnx gr4):c . 1jvird charge be placed so the net force on it is zero?

  Charge +2q is placed at the or vvuj7zpy r) rziox+vq: 9c0br88y2+migin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zer0mo +vq8pzb7)ju r9y2vrzy x:i+rv c8o?

  A copper penny has a mauipje83 w/yi,ss 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 force ozz(8l rp.wk63bi g)t rf gravity by the attraction of a fixed proton some distance abovzgtwzri 6)8l 3pb(k. re it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by non b0h0s tqh ctt00wcv /kh)17,jkwp )wjconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them acj0 h, 7v 1tqhk)hw0 wcptjb0/k t0)swpart 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 m547mz/1y sf9y0 5ko n fyoqxiqagnitude of the electric field at a distanceif 97on5fyo1m4kyyqz/x 0 q5s of 1.0 m from the nucleus?

  What are the magnitude and direction of the electzl,2 cnjtc ,q4ric field at a distance of 1.50 m from a 50.0-nC charge?,,n2c z l4tcjq

  A 5.0-C charge is 10 m from a small test charge. ou44h u 4(lhtw What is the magnitude of the elu44w (hhtuol 4ectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge.g ,) ckbxmr);j What is the direction of the elecgc;x k,) )jrbmtric field?

  A 5.0-C charge is 10 m from a small tes hc6-zg -sjeute1m-a,wf 9jk1* jg c8vt charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the low6ka98f-sjjg mgv--*c1uez cte j,h1 cation of the test charge?

  Two point charges each have a v yzok94k+z9h8. d:lmigqp 7mgalue of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midway between the two chaimhqz9omg74 8 g9plk +dy.:zkrges?

  A 5.0-mC charge is placed at the 0 cm mark of a met1jp t8v (wiy2wkq-sf 4a1ut.ter stick and a -4.0 mC charge is placed at thet8jks .tyqtvw4a-12fw 1 (ip u 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:hph4 -. buveb -4.0 mC charge is placed at the 50 cm mark. At what point on-p:bb 4h .euhv a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0 kx27,m0q kmxx.20 m. What is the magnitude of the electric field at the point midway between ,k x7qmk0xx m2them?

  Three 3.0 mC charges are at the three corners of a squarz 7k;ki(s6hbqs+i; qs e of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the i;qs;qs6i(k sh7k +z belectric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed qz* hma650duo)r: rmr at the corners of the square a ru6)d*qmz0hor a:5mrs 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 the square's center?

  A force of 10 N acts on a charge of 5.0 mC when ghj5rc::4s;y o )w eifit is placed in a uniform electric field. What: rj5o4ief w);gh y:cs is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass1z3ws )i1ktei 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 of 6000 N/C po -ilm guvhw8q bo::z/7inting downward. What charge must be placed on the ball for i7:iu bmhwl:8-qoz vg/ t to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is pla jz1+sac)gnpn(c6 bd+ ced inside a uniform electric field, and is suspended against the force of gravity. What are the magni+(bdgcz)npj c61s+ na tude and direction of the electric field?

  A metal sphere of radius 10 cm carriea9+a 7dan ,k tq92hijss a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the ks9a2+nd9,a j7i hqt asphere's surface?

  A metal sphere of radius 2.0 cm carries - k zp098lf mdpc.z9 k(nl7y-scz2ajra charge of 3.0 mC. What is the electric field 6.0 cm from the center of the sz( k 9.8 lpz2jma7dnslr kfp9z0cy--cphere?