State the law of conservation of electric charge k-hju4wn; (xi.

  Is it possible for two negative charges to c9w l(i, jxn+vattract each other?

  Is it possible for a positive and a negative c;bi0qhzp7p n il. u6r0harge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the gl2 i5 .ysvkadh 7v.4lygass rod acquires a positive charge and tv4y.igk ayd 7v.5l2h she silk

  A proton carries a

  The model of the atom a vd ayqvl27);i rgi56shows a

  A neutral atom always has *pvwyf: 2 kulbn-:2+gsoj;wb tmp 9x0

  An atom has more electrons than protons. The atom yybqi 1dxw3 agf4) sd w221+oiqo38cais

  Materials in which the electrons are bm n-sq4s 6fl1u:em-5g gdmk0l ound very tightly to the nuclei are referred to as5klfm- gss4dme : 1 -6lqg0nmu

  Materials in which the erm4bm m;t zmy6231i oqlectrons are bound very loosely to the nuclei and can move about freely within the materialtzmm;12m rbq 4i 3oy6m are referred to as

  A negatively charged rod is brought near one end6yw qitkcc70: of an uncharged metal bar. The end0cq:6w 7ticy k of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive cx.88zjyg pdbw*- j,ppa9 vh; xharge, and sphere B is neutral. They are placed near each other on an insulat w. yg8j,bxv*xj8;9php pdaz-ed table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positi7u j gxklst4i*4m .3bcvely?

  An originally neutral electroscope is briefly touched with a7j*p1xf :uce)-v qv fj positively charged glasfc1 -7qvj*pf xjev:) us rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positivel.jdv0k5t 4f*m.yyfv y3( yqvlx1 wo-xy chargeqxoj.3. kf vm1td y*w f(x4l yyy5v0-vd glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object tog5qiiz33nc9 2jxdaf2 kv6l.huches a neutral electroscope, and the leaves separate. Then a negative flaj2dh56zqiic n2v39 .x3 gkobject 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 tabld*xc*7f) r 9r5wn nbfpe. 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 forward, but does n p*dr7 5x9f *rfwncbn)ot 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 thegd a j70i (hduunoay 69x;);gx Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separfu( xvc4te1j3 ated by a distance d. The first charge is larger in magnitude than the second ch( ucxj31f 4tvearge.

  Sphere A carries a net charge and sphere B is neutral. 2 bx;ndbdoqak5gb+/2 They are placed near each other on an insulated table. Which statement best describes the electrostatic force between thea / 2xdo5;kb2 db+qngbm?

  Two charged objects attract each other with a certain force. +*x jtwlo/8 o;:bmky0s pg wa: If the charges on both objects ar w;t0mowg +/ylj:xk8b :ap *ose doubled with no change in separation, the force between them

  Two charges are separated by a distkwo2c1z (fw .gance d and exert mutual attractive forces of F on each other f.gko2w1 (wcz. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to 96mx,bourxam2ahj e*ls) 5i 0 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 orighri lxomaa5xm9 0*u,6jes b2) inal value? The force is now equal to

  An electron and a proton are sepand.bd)vc 7d f2md u9en.+8pcarated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron v+nc8 bneud9).d7.fma2d p dcis placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens toqd1 /3clea3xp81w oot the magnitude of the force on the first electron if a second8aet1 /q13wopc ox l3d electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What ha69c 1hndux tvpf(huygw m8/n, u2l1v;ppens to the size of h n,xwvnt /( 91u6 vum ugpld1;ch2y8fthe 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. W-j0gt2p z:xqhhen 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 positi:hp-j gq2z0 txve charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral02yox. tj* icu,af, aggk2l7 hdn27yl 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. Wgf n. lchl*2 x2i,7oy 2uatkd,yja 70ghat 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 a vecq*fz afu) fxt n3bz 1.eq+.f .mfq8y9ig9vcy,tor?

  At twice the distance from a point charge, the st ,r7 s4ocu8qjf3h tf, r2odc3trength of the electric field

  Is it possible to have a zero electric field value between a negativ)v 4p*hkoyu(oa 4vu( *q6ppide and positive charge along the line jauo(ou( * q4vv*di p yp)4p6khoining the two charges?

  Is it possible to have a zero electric field value between two t2 ga dkrya.4 wuj ;8z.+qaoq0positive charges along4w2qg ajuyato .a.0r;d qk z8+ the line joining the two charges?

  Electric field lines near psitive point wnq38 bmdj(w3fzhlha, /uo1yx.vt75 charges

  The electric field show:cf:s t k35vhmnq))bqn

  Can electric field lines intersect in 9rs2kkyx- l0;* -iiovxlje (pfree space?

  A solid block of metald*vxg,8)n w lh in electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the b,) 8x *nhgvlwdlock's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eac s-n*:ir :uxlgh given thun:lx- :igsr *e same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unifl1n17- j,ja savkga;.bex 4kborm electric field is directed straight upward. What can be said concgnse7bxj; vaa1a kk4l1.-, bjerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an elmsfda,0k 67f oi-hg3zu li.) xectric charge

  A positive point charge is enclosed in a hollow metallic sphere that is grounlciyz((r)+.cr v-f+8c rfzk cded. As compared to the case witho(ffcc8+zi kc(+l r .-r)cyz vrut the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static5nc3,eifwr dv*zqhelx4*6 vab9 zl 0.ax9tm2 equilibrium.

State Gauss's law.

  The charge carried by one electtg3 c9+8m kdwdron 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 r pypg79y5 9tg 2+mdobelectrog +trpmg ypb72d59 o9yns does this piece of plastic have?

  What is the charge on 1 kg of protons?.zjyh*/(m. ubvl v rujvl p*3.

  An atomic nucleus has a chamzmqsx1i7dk: 4ei p w 0is:46xrge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1* f+25earvw jf.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is fve*5+f 2jr wathe magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second cha1ic6m-lyusw d bb,i99rge, and the force between them is 1.0 N9 i6dmibbw,yc 1-sl9 u. What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are they? qgwaslh)-k(q1,0qj y n 1:rfa

  The force between a w1uay ;x- *pr8k by-ex$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expessk ) n:ltji37 hry l4ii1-px+rience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the elec:+p i)ij-x 4 7kns1illh3r syttric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. Tr*ihab y5 a6bpua 6e.-u17ijkq x(j *mhe first charge is jeaqi b ru 6 * ma.y*65uj-pi(h1a7bxkat 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 are placed on the x-axis. A charge of +2.0 mC is placed a ms6+ta,z1cx -,zjbusxzf s-5t 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 c6zzb-sux,f+z-5s 1,j t m acsxharge at the origin?

  Three point charges are locry p7h 7exde/ gvl2g11.z vbxl )c:y8tated at the 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 f7:l/lg)x. 1vr2cgpe xde71 yb zhtyv8orce on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a s4au72ikjj m nfl :)i/uquare, 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 the center charge if a tjfi4j mi:a kunu 2/7)lhird 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 nC is i2ah:7 vu h+zbat (0, 0). What is the magnitude of the net force onb:vz u hh7+i2a the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.l5;ij:zkwk) w rep z*;klc /9b0 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 nCp5r;lkwc:b l)kz;w z9kje/ * i charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral *d7 bi a01ivwntriangle which measures 30 cm on a side. What is the magnitude of the electnwv 70*1ibi darostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separau48(ovv ykpd7; vsg4wted 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 elevp(v4g 48 7ysd ;kuwovctrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 4r myom ,x*fw/f rt(z3m. Where on the x-axis can a third charge be placwzxyfo(r 3tm4 ,fr*m/ ed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wh)82 (fs8xu *t4lo4fozm qvfiir.7j xcere can a third pof fr*soi(847 8 xtjcm x.ov2 fl)uzi4qsitive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tot i-e+)e .tcdftal 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 s +, 1 l96t9qexrlhpupattraction of a fixed proton some distance above it. How far above the electron is the 9 s petpxur 9l+1lq6h,proton?

  Two 0.20-g metal spheres are hung from a common point by n;a g6gtv,shc ,onconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threav hgts, ,gc6;ads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is twmbxp*agh 6.la .z6o2he magnitude of the electric field at a distance of 1.0 m fromzp g.xhb 2 *oa6ml6.aw the nucleus?

  What are the magnitude and direction of the electric field at +esiu31z.fjg a distance of 1.50 m from a 50.0-nC chargz 3ge1.siju+f e?

  A 5.0-C charge is 10 m fry) qh5ui tj*lcoju4h*k 5a ,hb;h*-dxi5 ycj4om a small test charge. What is the magnitude of the electric field at the locati,*dhhoy*k54;) bi5cchhq u lu*yjtjj- a4i x5on of the test charge?

  A 5.0-C charge is 10 m frm +0-3roon mhqom a small test charge. What is the direction of the electric fieonm 0-r3 hmo+qld?

  A 5.0-C charge is 10 m from a small test charge. What is t*lvuo7 g++i/r ywy5ok he magnitude of the force experienced by a 1.0 nC charge placed at the l ri/yu+wkly +7ogv*5oocation of the test charge?

  Two point charges each 4zzz hfda/s-; have a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point az/sh-zz;4fd 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 xc c;auul;:ux/ 8hni,mC charge is placed at the 50 cm mark. What is the electric fa/x: i8x;;ccun,ul uhield 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 chargex;k)l hkerlph39 oxa2: u80ta is placed at the 50 cm mark. At what point on a line joining the two charges is the electr; 2rlxh0 uk 8eto)la9x3ahp: kic field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed 2.imntgk5kp0at x = 0 and x = 0.20 m. What is the magnitude of the ele. 0mnt5gi2kk pctric field at the point midway between them?

  Three 3.0 mC charges are )pkou v3ark4; 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 )rv 3a;okk 4upfield at the center of the square.

  Consider a square which is 1.0 m on a side. Charges aredvpbam n3t 9tfo,n a;l fn1mie5+72 1r9uh2ka placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC a2+e a,1h omtr2fa;m951bpui nk 9df7tv3 l nnat (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 actsye*o: .veq/(wdcayy+5s 7 zuj on a charge of 5.0 mC when it is placed in a uniform electrcuw s*ey 7oy dv(z ea:.+/j5qyic field. What is the magnitude of this electric field?

  A particle with a charge *lo- 9dcb6 jaqof 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 of 6000 N/C poinq)tttj. a9ib o8 rhe ,;mp1zw*8f bzz1ting downward. What charge must be placed on the ball for it to be susp 1e1f)t b; .rbh8j8z9t*ptwazmziqo,ended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placedsyvv8(n8ym8 3 vqjr:o inside a uniform electric field, and is sy sn3:r8vy(q8j mv v8ouspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carriecv*v)zjx e wgro+3l;9d6tr8ls a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphe rej*g r+z9otv3)c 6xd;v8lwlre's surface?

  A metal sphere of radius 2mrme(h,s;u(aii *bhm8 u/9- fpy4wwy.0 cm carries a charge of 3.0 mC. What is the electric field 69- y; meahmsi/bimpr*wy8u ,( w4f(u h.0 cm from the center of the sphere?