State the law of conserv.zf/(egc:51m bvxzlltj8* o;tayn9j ation of electric charge.

  Is it possible for twjz ,e4q.40mt kauuufv:h y40fo negative charges to attract each other?

  Is it possible for a positive and a neniqc tgg,)1 h1 ch,4yn/m -terg,by3ogative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the procesb b -;;ywk n55hajxc6ss the glass rod acquires a positive chnj-6 xbhcyb;aws;5 k5arge and the silk

  A proton carries a

  The model of the atom show vaxwa1vy lcpcc/4:j6 he);+ds a

  A neutral atom always hbm5df/x8k; gh6cmnc 1mg:/ycry) 6 qt as

  An atom has more electrons than protons. ny7lpe+k4,n d/ jedb*.w:ifd The atom is

  Materials in which the electrons are bb eidnchru 9i h( ;:zh1e/t87hound very tightly to the nuclei are referred to ahi hch h(tde 79nu:ez1r; 8ib/s

  Materials in which the electrons are bound vc5s+zmf v. ke0a 5tc.qn, kz6cery loosely to the nuclei and can move about fr zvkm5,nf c. .sqcaekc5z+6 t0eely within the material are referred to as

  A negatively charged rod is brought near one end of andy3k ow,l-u0 m8sff*itk 8 8kn uncharged metal bar. The end of the metal bar farthest fromi 8*sn f38 lkyw ,t0kdfmu-ok8 the charged rod will be charged

  Sphere A carries a net positive chargi1+y2*ls d9ach* nxeie, and sphere B is neutral. They are placed near each other chsn 1*ly ea2*ixd9 i+on an insulated 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 positih sq)4m af4y5/7sl egai d:c mc(st2:elvn53cvely?

  An originally neutral electroscope is briefly touched with a positivelyc-yws-87k re i charged glass rod. The electi-ewrk78cs- y roscope

  An originally neutral electroscope is grounded briefly while a positively cha u+s cnx0ts d7cwv:r (p(wh q2s*w9co0rged glass rod is held near it. After the glassxcovu*tsh(w2 0 7r (90 :cw +qswpdncs rod is removed, the electroscope

  A positive object touches a ne ttn ch5a42jr(ry hc 6,gqk5r/1q qkb5utral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not toucgrj6/2yqkrq1k, h( 54ca55cn bhtqrt h it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table+;bov-sp g* wq. 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 for- q+ *b;vpogswward, 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 Cof(rptwm+l +s- ulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are s)5prvxx* tp*l eparated by a distance d. The first charge is larger in magnitude than the se*p pr*x5)tvl xcond charge.

  Sphere A carries a net charge and sphere bs bhvdl -0( .pjc/xc/B is neutral. They are placed near each other on an insulated table. Which statement best descrij -d hpx b/cc/.0slv(bbes the electrostatic force between them?

  Two charged objects at:vn)eo0dy8/ 4bk r4ttjv l;bytract each other with a certain force. If the charges on both jlv/odr:ve4ykt b84);t 0b nyobjects are doubled with no change in separation, the force between them

  Two charges are separated 2ftbh7x i6jm:0 r358o gbxm ms*t1yqj by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the m* 28b5gt1jtjri6 3f h:yx0s qm7mboxnew mutual forces?

  Two charged objects attract each other with a force F. What happens to the forc4ec5u g4yomayw0z 3 6ke bu 4 cw3e5m g4kyya06zoetween them if one 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 of 1.0 m. What happeniss6b wgk))u )8kcq4 rr(dzn4s to the mau brsk wnzkciq64)d8( g4s))rgnitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a dist+*z u7 dayya.1 sx i+nn4q1zbkance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placedzd. +*4b7nza1 akyuiyqx1 sn+ next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What hdoj*2jb6 ekq :appens to the size of the fo keb:jj 6*q2dorce on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is plac;zpmk+) z9 hpned at the 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 positive charge at the square's center. Now, identical charges of -Q are placed at the other three corners of the square. z)zp kmh;9p+n 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 pl s1cg:f3.v xocaced at the centroid of an equilateral triangle. When a second charge of +Q . 1cg vs:x3focis 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 other vertices?

  Which of the following nhnuzj/ s8e:8 is not a vector?

  At twice the distance from a point charge, the strength of the electric fie; j9j7wz8 ;okl,el41a +hdfqtbna /r tld

  Is it possible to have a zern qvxh60-wdg3 o electric field value between a negative and positive chd0h3-6w ngvx qarge along the line joining the two charges?

  Is it possible to have a zero electric field value between two positive ;l +:. bak.rothdt/ sucharges along ho /lu.b :trdstk +;.athe line joining the two charges?

  Electric field lines near psitive pointt2 nj1 xb4y6ic charges

  The electric field show9wz dwfny9ui-r0*d a5fq(m+an

  Can electric field lines iz r99fkff+w10x 5pxecoula8 2ntersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elgjpghmfq: x5a)+r *6 1v/kzne ectric fik hnjgfe6v 5 +q/*a)z1gxr:pmeld. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each gi:vwe8ubgz c b4t 7wk-7ven the same charge, the electric field (E) midway between the center and tu7bcw-tw 87b zk:gev4 he surface is

  A cubic block of aluminum rests on a wooden table idt;3h g1r +2algr(nri+jxd 1kn a region where a uniform electric field is directed straight upward.(g1li3dr+ gj + n;k2adxr 1thr What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an el yw/b( 1,m() pdwhmj i;s.mgwwectric charge

  A positive point charge is enclosed in a hollow metallic spheret 5h.ae9 q8npw that is grounded. As compared to the case without the hollow sphere, the electric field at a point diw9.ph 5qa e8ntrectly above the hollow sphere has

State three properties of conductors in static equilibria ;czgt(mk11p6wpqs;um.

State Gauss's law.

  The charge carried by one electr8s f a+ev72yixlqz3 8 q),3fpz9zhbhcon 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 th ufdvi4a f/clb,4::o qan electrons ucvboa 4: : ,/4qdfflidoes this piece of plastic have?

  What is the charge on 1 kg of protonsyptn,c7 m l 2:94bxkch?

  An atomic nucleus has a chargex: rb 5hwje.35t,wtvgy)fqiwf9 cf 8: 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 -4.0 +f bm e49d)9hods xh+omC, respectively. What is the magnitude of the electric force bee)9od9xsom+ b+hdfh4 tween them?

  A 1.0-C charge is 15 m from a second charge, and the forcs0 j6stdm:xwr8m z83je between them is 1.0 N. What is the magnitude of the second charge?xjds 3 srtm0w:z8j6m 8

  Two 1.0-C charges have yq 3mn)bii6a5e,f+cvd ( tg4ia force between them of 1.0 N. How far apart are they?

  The force between a y/ m7:p;kq 8yps2ugy s$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cd tn3tk cs/*u9m apart, experience a 1.0-N force. If they are moved to a newnu3kt s/ dtc9* separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2sbu fx; ri *13hsaw)8z.0 mC are placed on the x-axis. The first charge is at the origin, the second to thea)*hr1ssw z;8 xbui3f 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 tuzmfk0e +c59.a4 ;3mo d icscshe x-axis. 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 at the origin?cs f4u0em ; ic39maozc d+s.k5

  Three point charges are located at the following positions: Q1 = ( 7zg/v4g bwku2.00 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 forc/ 7g bg(kw4vzue on the 3.00-mC charge?

  A point charge of +Q is bce;qxm ;d c 2f8lgj;1placed at the center of a square, 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 c;qe c8ml x2j gb;fd;1is 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, g5xpf9)yaw:k-tmem+b 22a os0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitudesa 5 -+bpfa2k9wt: yem)mo g2x of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.3/ wiin,gd bd )7yfef ;teo9,;k0 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the )ow7iie;, /k n dg,;bfytfde9 net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC ar ,ud.bizo,7m8f7l pdq e placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one oi8,,o7dum. 7qfbp zdlf the charges?

  Consider point charges of +Q and o 83nnu /vlalmz6)yw-8f:s owt 8u6b. fmf4 au+4Q, which are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of 6s8aovu.8noutful nwmz3y -flwbm 8:6a/f 4)-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 anw.w i: x/q;hejn3px1t x = 4.0 m. Where on the x-axis can a third charge bwnxx.:qnphj; /iwe1 3e placed so the net force on it is zero?

  Charge +2q is placed at the origin ap3zgatcq5t1:,+bvxmm ep9; m nd charge -q is placed at x = 2a. Where can a thi;m x+c9m:t5pev3z1aq mb pg ,trd positive charge +q be placed so that the force on it is zero?

  A copper penny has a mastw c,j7(zh m-sw p.cl.s 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 of gravity by the attraction of a fixef0t iz va-i4d5l5i; pzd proton 45 il5d-fpt iaz;v0zisome 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 thre*y mhn2t39r laq g8k ;*y.r :aprygmo-ads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the ana*yk2*yonm 9 ht g3:8rrgalp.rm;yq- gle between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e.wonwcrgp/1+g 0 .1rn l What is the magnitude of the electric field at a distance ofl ro npcg0wgw.+/n11 r 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distan0. 3/kmy p 3sbmzakuhdr6 gt(o:rbj( 1ce of 1.50 m from a 50.0-nC c kr.mh 016 mjrkyp3ota bug(s3/(b:zdharge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitud/eogy9e h5)d oe of the electric field at the location of 5oey h)o9/gedthe test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direi0i w 7-pa0kpdction of the electricikpai7w 0p-0d field?

  A 5.0-C charge is 10 m from a sm(3dx uj5o c2qdall test charge. What is the magnitude of the foc 3 u5dojq(2dxrce experienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separaugzl, y m/lu7,*alslqn*nm8w:g3z l6ted by a distance of 4.0 m. z mgn,w u:/,a86n ulm7zl*y3*sllgq l What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 y 6x l/e- ;nta*ug4wfuuz0te7 cm mark of a meter stick and a -4.0 mC charge is placed at that0l-*f6u;xw e en4 gu/tuy7ze 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is plac:8nspvu4a qob:3 e2r led 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 e :82puo:r vsa3lqbn4charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. s :m2 rwvbr7s 0zt71uqWhat is the magnitude of the electric field at the point bwu0rrts:v2s q71z7 mmidway between them?

  Three 3.0 mC charges are at the three cos gkkssz;r73lhw1 gi cat5705 rners of a square of side 0.50 m. The last corner is occupi13g7azkw5 7 i s;sgslc0tkhr5ed 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 placed aqw -g.9qdj6h;h zvqa ;t 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 the magnitude of the electric field at the square's centerwdh qq9q;.avzj-hg; 6?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in tmfzfk6j rpn a.wa tju:e 41aq5-6v32a uniform electric field. What is the ma6ze f3a6t m5atkwf2unrq p-:.4v1aj jgnitude of this electric field?

  A particle with a charge of 4.0 mpy erhh4,2(*x0v pcmr C 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 a /n* hy3.*muq7zgxuft1jj g0 is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for ituqjm 03. t*uf/ny71azgjgh * x to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball 0xq u2 ;wum(iggoke43 t:nxq :is placed inside a uniform electric field, and is suspended agains4xmkegug 0: xto2q(:i ;nwq u3t the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a chargq -dmn cue/4vx mbti4q,-2la6 mftn2.e of +2.0 mC. What is the magnitude fbte2-mm-dnul4 ,.46i2 qm a cxq/tnvof the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge ofxzw( ujjlkgv8t4* /c7 3.0 mC. What is the electric field 6.0 cm from the center olvjwj u*c t gx7(4/kz8f the sphere?