State the law of conservation of elecrphzm sr;,gu-6ls(sot)1e) v tric charge.

  Is it possible for two negative charges to attracu dti5w xr08u+ti2a*kt each other?

  Is it possible for a pos nqh2-3 die kzhd-/(kta k3.jkitive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process. 1kn q,ormyup3h 5g4v the glass rod acquires a positive charge and the siy1okqn 3 pgum,h.v 45rlk

  A proton carries a

  The model of the atom shows ax7d+*n 5 t,qb:ui 8 h6lyiyrhu

  A neutral atom alwayy b,ea2 j2j,(zsnc0fys has

  An atom has more electrony tc15mk8n:5 k kmf wtz6 o0zpwr-b l,z(/yu.zs than protons. The atom is

  Materials in which the electrons are bound very tightly to th b xrgx;a5trkbb77zddr n25q8r :o7(xn1u 1 pee nuclei are referred 7nrx71kprb ;qt81b5x dur7ago 5bzn:xde( r 2 to as

  Materials in which the electrons are bound very loosely to the nuclei a c s2.7wyfcy;gnd can move about freely within the material are referred ty;2cg yc.7s wfo as

  A negatively charged rod is b*6f: z:oyl xpxr 4j/cbrought near one end of an uncharged metal bar. The end of the metal bar farthest from the chaf ojrb6z4 y:xlp*: c/xrged rod will be charged

  Sphere A carries a net w 7c+smw,u.mu ,9lgr,7ner/(u /e7dgzt m n kdpositive charge, and sphere B is neutral. They are placed near each other on an insulated table. t es uzmwlrrmd w/+g7(n9u ,.c7, ednkm7,/gu Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged m v 56,h)b*kv;otjorx9e swe .rod charge an electroscope positively?

  An originally neutral electroscope is briefly w79k8oz xdj h5touched with a positively charged glass rod. Tk xhwjod9785z he electroscope

  An originally neutral electroscope is grounded briefly while a positively chargf s5 zopih.bd-x)0r-ye 5z-.dpiyx0r) o- hsfbd glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope,s+5:e8gogujype lw (/8gv j+u and the leaves separate. Then a negative objectu:y5 /8ogv(jguw+jp 8 s ge+le is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on ar cbza:zv- mv qqwssq(;-/6c)n insulated 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 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 :q(zvqsc smr)-; -/vq 6 bwaczon each ball?

  Charge is

  What are the units of the Coulombjn w umv9cz+7p35mf*8ll4qce constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firstw((.ld xmt;ol charge is larger in magnitude than the s.d( ol ;m(wtxlecond charge.

  Sphere A carries a net charge and sphere B is neut0xxvw89) fdv pral. They are placed near each other on an insu80p)xvx 9wfvdlated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other .331tj53du4l uw thpwvy5qwwq ii3:l with a certain force. If the charges on both objects are doubled with no chanwi4 vt3y3jld p5l3u 3w 51h u.iqw:wtqge in separation, the force between them

  Two charges are separate53 txns3h gw5fd by a distance d and exert mutual attractive forces of F on each other t3xswhn355gf . If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each ot5v4 ph,lndf j7xy-il6 her 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 iyp-iv4jh6dx nl7, f5lts original value? The force is now equal to

  An electron and a proton are separated by a distat+0fs eayd zb*a, ,r9qnce of 1.0 m. What happens to the magnitude of the force on the proton if a second electron,ae*b,z0 sr t +aqdf9y is placed next to the first electron?

  An electron and a proton are separat 6-le-r ydnfz0o9kb+a ed by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the pl9+ynd kb6a --0orzefroton?

  An electron and a proton are separated by a distancef)5n+mjd qluv7y.y9t g:/c bo of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m clc ylm9v)byonudqf: jtg7+./5oser to the proton?

  A point charge of +Q is placed at the center of a square. When a second hbw)a*n wu,)zio7ze a29fd szv 29l9f point charge of -Q is placuo 2)n2awf9 sd9lw )bh9zizfv7,az*eed 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 equi6kc bpoe.e+ x3lateral 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 at one of the otheco+3x ekbp. 6er vertices?

  Which of the following is noan53bg4 eee u9t a vector?

  At twice the distance0 rk.3m+j- mg5 xc8uk(s* dckpr9sanl from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a( zq rvq+/vp;(x2s/no pnb 7sq negative and positive charge along the line joining the two cz q2r (bo /qvxs+;nn( pv7/qspharges?

  Is it possible to have a zero electric field value between two positive co8bp:0ewubc)id e*a; m cw3s9 harges along the line joining the two cha p meo:0*a8;c se9)uwdb 3ibcwrges?

  Electric field lines nz5/ 2x*i4s chk ;jht5:pbnnp wear psitive point charges

  The electric field shown 9g:g :te0esf :vymcm3

  Can electric field lines intersect in free 0ffr llna8mv:92 w:r p8nefy) space?

  A solid block of metal in electrostatic equilib/7n713 jgo2.e uez3 rgcwg tucrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's interior3/g 1.e3tnjo w7ruc ug 7c2ezg.

  If a solid metal sphere and a hollow metal sphere of equal diameters arf y/goipnekk i07 t;.9e each given the same charge, the eleck it.i n pfg;oe0k/9y7tric field (E) midway between the center and the surface is

  A cubic block of alumizeixrtc5vf0r + f *)c)num rests on a wooden table in a region where a uniform electric field is directed straight upward. Wha cfxezi)r) f5r+tv *c0t can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibriu hbst4hg(ed739vmug uh -7r3xm near an electric charge

  A positive point charge is enclosed in a hollow metallic spher wz4nk pdt0cw9 kmfam,.jt;;0e that is grounded. As cowtc0m z nfwtpk am,d9;4. j0;kmpared 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 s :q . .k;pabvihhzbw/b1 j2b,xtatic equilibrium.

State Gauss's law.

  The charge carried by one electron is iv00gli:l (waerk2 g. $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net chayhns 3 u0 4/nhcch*r*o,f4ur f d3ad;wrge of +2.00 mC. How many more protons than electrons r*,*na3hdcy u0f/nw c f u4dor34hsh; does this piece of plastic have?

  What is the charge on 1 kg of p2 fqq(lz85 2yf:nzgkfrzw86k rotons?

  An atomic nucleus has a chaqw-u c(l .ae ;ilc0y3ka(bai2rge 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 o;mu b 1e:dfqjd :yv7,cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric forcq 1ddf,7y::uemjo;b v e between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0mw(r z94qi:zsbjv)ak 5 5,6elj xsi-j N. What is the magnitude of the second chx5s9ze) m q5klb:-(sr4wj i i6 jzjva,arge?

  Two 1.0-C charges haves*hacq ,p) tj;sbfk b14h21dk a force between them of 1.0 N. How far apart are they?

  The force between a 5sqinc.n 54 o a vn66zdm;,cnh$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, expex ynbb1;eo7+irlj4 )y rience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric force between beyl )4 nrby+ jiox;17them?

  Three identical point charges of 2.0 mC are placed onr tqwf 6qmw9,kid0. -c 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 1 06wmdikft- w.,cqr9q 00 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-a knq iv)ri3x8*xis. A charge of +2.0 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 charge a 8i rn)*xkq3vit the origin?

  Three point charges are located at the following positions hrs01j5 er8ns: 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 force on the 3.00-mC charges0r518 h ersnj?

  A point charge of +Q is placed at the center of a square m2wizhh o(* ;f,pui6p, 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 ,zh io ppw 6h*uf2m;(iif a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = - 05zg3s rj oxfw2s;*;y)f dwr/0rarzi1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magn ;a3iys0f5wgzr* /rr0d2 ) fxsrz ;jwoitude 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 (0, 0.10 m); s/5qtt vn/t m +-5n4 0gjhku*mzixha/Q3 = 5.0 nC is at (0, 0). What is the direction of h4+nzn0xu j sh /t5mgqmtv*at i//-k5 the net force on the 5.0 nC charge?

  Three identical charges o6v bjhw4/;yaa7h baf+vg.1 kef 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitu;ja6bh bk+1 eg4v.hwa7/yfvade of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are s w+z8g 2 oe*+qy :zl8j,o;ojwcgmojgbo:o 1 ;ueparated by 3.0 m. At what point, on a line between the two charges, woulo;gje;88lb j2++ qoo1w*u o::czo j gymgow, zd 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 +9.0-C charge is at x = 4.0 m. Where oe(qx4,p * beywn the x-axis can a teqe yw4,px(*b hird charge be placed so the net force on it is zero?

  Charge +2q is placed at the p- zn)njg y1h6origin and charge -q is placed at x = 2a. Where can a third positive6hp-yznj g)n1 charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A ti(rxy+og1b g 5otal 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 a fixejs9io99j0 go nd proton soi9jno90gsoj 9me distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting t mafak; 932cg y,g+u o)(s0jq btn)two9/qqlfhreads which are 30 cm long. Both are given identical c0qm,t q2go(ga/a nj l) u9s9yobfc;kf3)w+tqharges, 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 issnid-7njcp +d0axv a/5w5f 5k the magnitude of the electric field at a distance of 1.0 m from the v7i+ 0j5d5aaf-/scwxnnkpd5 nucleus?

  What are the magnitude any*jdo8( oh- qfd direction of the electric field at a distance of 1.50 m from a 50.0-nC chao 8doqj*( fh-yrge?

  A 5.0-C charge is 10 m from a small test charge+9 olouxac;:bex)k k/ . What is the magnitude of the electric fiou9lxc/k+ ;a ):be xokeld at the location of the test charge?

  A 5.0-C charge is 10 m from a smxxydup bx)101 pp rx-4all test charge. What is the direction of the electric fie0p1dpxr-4b y)xx1p u xld?

  A 5.0-C charge is 10 m from a small test c;yspw-, r)im3rj l,hlharge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location o3hl, sr;lyrp w)mi ,-jf the test charge?

  Two point charges each have a value of 3.0 C and are separated by a dirc6zusr-sb:5/ ca/4m r* c qkjstance of 4.0 m. What is the electric field at a point midway between the two c4c/cu65cr brr: jmq *k- s/szaharges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC c60 t *w(amqxit mw+z/kharge is placed at the 50 cm mark. What is the electric field at the 30i/wm(+atxk0zw6 *tqm cm mark?

  A 5.0-mC charge is placed at the 0 cm ma4io4cnpdh b* :4 hvwa)rk 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 o: can)ph4hv b44*idw charges is the electric field zero?

  Two point charges of +3.0tf;fui8w 5m+p t+m9(vth; zej mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric f9(tw5+ hp;i;t tfmfzm8e vu+jield at the point midway between them?

  Three 3.0 mC charges are at the three corners of aahi95 q7.xy:j og0 a rutjzq7cb h8(2f square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electricyqfz g(u9 :tq.7icxo5a2 j8h0 ba hrj7 field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are pt pbm/794)m mul*ins placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, u 7pmps t/9bi4m)* lnm1); +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 ;rmnd27g2aw0. gwcrh xx *eg idf(.*owhen it is placed in a uniform electric field. What .gf an*wg0rm.oridc ge x;2 hwx( 2*7dis the magnitude of this electric field?

  A particle with a chal. y3r5uxgyg - bp4vnvy,e(+m rge 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 el yth; j*jepylaq2nf7/ mp) 4d: 7oef,vectric field of 6000 N/C pointing)jov*fe:n7pp 2yt ylhj;4/qa,e d7m f downward. What charge 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 ball is e iisoc:s :f9:placed inside a unif e:s9io:sc:fi orm electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magni qoza);.-jvp ytude of the electric field 5.0 cm from o-vz pq ;).ajythe sphere's surface?

  A metal sphere of radius 2.0 cm carri )8xy,gtyv0sfv65gu )baspxm :8 blf(es a charge of 3.0 mC. What is the electric field 6.0 cm from the cu8m,xbs5(g x0 t6f)sp gvy ):vf ba8ylenter of the sphere?