State the law of conservation of electk/;qcop+chs53- (ttuz5hs6kpmsbw , ric charge.

  Is it possible for two negative charges qqb5 41zv)iiyto attract each other?

  Is it possible for a positiv0emu +ley* .o60xgctde and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. *j g uld++2ogqk(t2gj During the process the glass rod acquires a positive charge and the silktu2 2gqj*og kl+gj( d+

  A proton carries a

  The model of the atom s5odup-01 kle) yh7pyghows a

  A neutral atom always /h,go jed2 z kv:uh :jpq/tk(/has

  An atom has more electrons than protons. Th0h .b gfqxxx );i+wknt.qts (+e atom is

  Materials in which the electrons are bound very tightly to the nuclei are ps*sur+gz).36l ci w3cpb+r yreferred t6 3 ugr3+ysicz).l p+r*swcpbo as

  Materials in which the electrons are pjsr d2a3os4 g4zg /4mbound very loosely to the nuclei and can move about freely within the material are refz 3pos4dj442gsg mr a/erred to as

  A negatively charged f)jka/o(m,zvt t;p h4rod is brought near one end of an uncharged metal bar. The end of the metal bar fartat;mzk, f /h(vo4t)p jhest from the charged rod will be charged

  Sphere A carries a net positive charge, and spherolo7f;a3b lx*rn/o e: e B is neutral. They are placed near each other on an insulated t;:ox/ea7 l*onr fbol3able. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electe jk k i*xsc*. yfd5ptsnu;)66roscope positively?

  An originally neutral electroscope is briefly touched with a posiw78 gure1 /zpktively charged glass rod. The electrosc8rup/ zgw7e1k ope

  An originally neutral electroscop +z,uz mm1ed 0qkxi vt59-21qpzd9fxde is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electroscope , kz1 5x9pxuz9+vmimfd2 d eq-q1td0z

  A positive object toudrjfjbpe7z+ 85:x 6xqches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, bu 6pxf zqjr5j8: 7dx+bet does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A neutral me4 d9zx/qlu 4antallic ball rolls straight toward the object, but stops befox ulnq94a zd/4re 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 on each ball?

  Charge is

  What are the units of the Coulomb covbten nri134/ tiv6.mnstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is large j jx)zpqsj0fpv55fy:9 6hn -kr in magnith6x-j0nj :qsf pkpy)5zf95 vj ude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are plc1oyxdsi7 20t1m7o v, l9ped laced near each other on an insulated table. Which statement best describes the electrostatic force between them?,1 2cdes9 oxmt07d ilo yp71lv

  Two charged objects attract each other with a certain force. If the chargdd1(y.8x nttues on both objects are doubled .nuyt(d 8dx 1twith no change in separation, the force between them

  Two charges are separp9xjm5x30*jtfzm9 vj9 al e* yff9:raated by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/39fz9e39lv atx *j05m:9mj*pjxrayff , what are the new mutual forces?

  Two charged objects atvc5sr4)2( umaso y ko.tract each other 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(v.m2ao cy)4okru ss 5 one-fourth its original value? The force is now equal to

  An electron and a protonhc-*wf -zt vly1;:a px are separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next to the fifv lhty:ax -c 1-p*;wzrst electron?

  An electron and a proton rc2 y xv:f68 p,-s*uy cddq)omare separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second esy- uo86pq 2m :xvd *,dfrcy)clectron is placed next to the proton?

  An electron and a proton are separated by3yj. q ni )a- snfbws0*gfd+/j a distance of 1.0 m. What happens to the size of ynq gns3 d0.iaj)/-f*fwsj+ bthe 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. h yci(;-hr6 jgWhen 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 chi6 c(y- ghrj;harge 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 plc.ru7q3s4 mclh*f 05pm ase1jaced at the centroid of an equilateral 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 magnitud f*cl m1s .45j0qhsmae7cpr3ue 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 followinoeljk4zd++ u9 g is not a vector?

  At twice the distanc4 )a s-v it45xwwarta5e from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative ae .m;56,wyv uygvyr.c nd positive charge along the line joining ; m rw yeyu.gc.yv5v6,the two charges?

  Is it possible to have j 64drc-ix7 l91hpcb+6inlqua zero electric field value between two positive charges along the line joining the two jnhi616uqbl 4xi7-rc9+dp lc charges?

  Electric field lines xvggsp.x:ugr0q;)/ l/ zk2 nm near psitive point charges

  The electric field s/svxvgye8 d(9;6j y mshown

  Can electric field linesodvhtgpm *jjv+yo 24 j;0hz 6( intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in (8de e ywkz;acclw58to :gujg55t( (ma uniform electric field. Give a statement concerning the electric field in the blockg8ca5yt l (j:ud (oewcmew8(gzkt55;'s interior.

  If a solid metal sphere and a hollow metal spher/;sd5 jfcju.r e of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfj/uj c5drf.;s ace is

  A cubic block of aluminum rests on a wooden table in a region where a ,ar*7l-j5q xowo qse7ua ag,nyf 2b05uniform electric field is directed straight upward. What can be said concer 2aunexl 5o,,5s77fo-j q g wy*a0baqrning the charge on the block's top surface?

  If a conductor is in electrostatic equil.w av5wtbbo;c5 y (tr5ibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that i9;-v nc6nactos grounded. As compared to the case without the hollow sphere, the electric field-oc an tn;96vc at a point directly above the hollow sphere has

State three properties of condi-id +1xo ad;:u nsv.uuctors in static equilibrium.

State Gauss's law.

  The charge carried by one electron 2;rgnhl83sy1u7pgro 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 chaq3fw+2cc v gsvs q/88crge of +2.00 mC. How many more protons than electrons does this piece of plastic +8cgfw v8c3sqc/s qv2 have?

  What is the charge on 1 kg yt-,e.d-knx0jv l-zaof protons?

  An atomic nucleus ha0fq bz +aofij+:w+p h k:h/ gz7x-v.rqs a charge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separi:8lo7 e/dee vo-csu lll7l7 i/d28h rated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electolu/o/l l-e8h7lvi 7s e8:i2 l ecdd7rric force between them?

  A 1.0-C charge is 15 m from a second charge, 8,*o(o otkju3cl.p svand the force between them is 1.0 N. What is the(u 3ooc,pjvk*.t8sol magnitude of the second charge?

  Two 1.0-C charges have a force qlx:w mkzw(rdg4c 3 .xe499 vubetween them of 1.0 N. How far apart are they?

  The force between a :niakuv;8.uog*o o0 q$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, i* iert26xat tg/*-fxc nitially 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the elecr*ac2 itef*x t 6txg-/tric force between them?

  Three identical point charges of 2.0 mC are placed on the x cjje.n8cag-plwyd-(u 1zp bx4i+ 8n;-axis. 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 mag zycbi(pu+xg -e8.nj-wc4 1d8pn ajl;nitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on kkx1h2o,qxc -+i cvy0 the 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. Wh0vicxhxo2c 1 kq -ky,+at are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at tol(m4h25w qxhk8tnb: he following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at 58qnh: x bhmtwokl(24x = -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 secon o ibv)09bms3wjvx 6r*h --s4 zag0bknd point charge mg*skizabvwb3-xb o)r 0hnj4 906s-v 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 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);3o*l .)3gf kea awxjq. Q3 = 5.0 nC is at (0, wq)*.f.gelkoj xaa3 3 0). What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = 7xcjm :p)bl,j-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the netjcj p)x:lb,7m force on the 5.0 nC charge?

  Three identical charges of 3.0 8+8 iytmbam7. zw-ryrmC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic -izry bm+8.rw 8am7ytforce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0f9 b6hmy(ss,qhtme- d6djs7 , m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such ,mj(sfhm b- eq,6dt 7ds y9s6hthat the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C chargeh fjn1zcgy9m)s h1ga( w/hiwxdj . .;8 is at x = 4.0 m. Where on the x-axc w1agi1hwdn.)y xszh9gm/h.( 8jj; fis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed a4zn s. xk9bg5xt x = 2a. Where can a third positive charge +q be placed so that th4xn5b.9 xz ksge force on it is zero?

  A copper penny has a mass of 3.0 g. A tmubvp f:p sy30;cy*t6)vty+ ootal 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 againssc , loj0yit8z/)re ky2s5-tjt the force of gravity by the attraction of a fixed proton some diel5 zjs-0,2)rjt sk o8tiycy/stance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting th+3:qr hzoadq5(j ms:vk ,6 pvureads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle be :,mjuhz5qos(6 rqpd:3+vka v tween the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is thehaf, 78rxge*radz) o( magnitude of the electric fier 7r*fo,a(zdx a8 g)held at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at j3z0 cfuxy ,a ,z 5)wkofvd1*qa distance of 1.50 m from a 50.0d01k z yx j)f3aqz5vocf*,w ,u-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the mamw7na1a 7ni /egnitude of the e1w e a7nmn7/ialectric field at the location of the test charge?

  A 5.0-C charge is 10 sjn7zoe/j*rfi(l7l( m from a small test charge. What is the direction of the electric fiel /( sj(zlrifnle77 *jod?

  A 5.0-C charge is 10 m from a small test charge. What is the magnii,b-vym5m g :wtude of the force experienced by a 1.0 nC ch-b ,iywv:5mm garge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a di 3 :q-);hwhbd bwyog+ystance of 4.0 m. What is the electric field at a point midway beto bqb;h3+yh-):gd wywween the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stickfk; jqkp54 yfcw- i(0r and a -4.0 mC charge is placed at the 50 cm mark. What is the elecwi k(-4fp jr0c;f 5qyktric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick (ty)k0mjf r*d;hdx 6r and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two chrj*dx ymfkh(d t6r)0; arges is the electric field zero?

  Two point charges of +3.0 ,qe: rf3d3cwjuv(i +wmC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the poin:,dw3( uw+vricj3e fqt midway between them?

  Three 3.0 mC charges are at the three jenf/fvmrl1 t8p8*m: wv6 fj-corners of a square of side 0.50 m. The last corner is occupier6 n-pfv8j1fj: / 8me*l fwtmvd 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 sidgrgeam115 v8c xk+vhm)1msex3 7wu 7n e. 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). What is the magnitude of the electric field at the square's cewm1me3vmxga1sr v8751h+ekgn xu7 )cnter?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniform e.i:ath3s f+nua jq :poz(- p(ulectri(.o i-qapuhsnua:j:z f3( p+tc field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has)bixp 6-36 nks ra3sie 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 elect d )e;y3bvzi-t.j:bn99rhsk xaj5mz( ric field of 6000 N/C pointing downward. What charge must be placed on the ball 9m. 3 zdaj- kynvzs bh(rjx )5e;bti9:for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball 5cdsol *op ;3o h5ugz +8npro5is placed inside a uniform electric field, and is suspended against the force of grav +oro dpp;g*l3oh c8n5us o5z5ity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.)r n gp3ahvwu.ozb8r4+3. dhnk2o m/r0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's)ov2gdnbmrhr r3+z4k . /o 8uw .han3p surface?

  A metal sphere of radius 2.0 cm cbuq z1j1o.u) fn9tjbzec4 - qbj: 45faarries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of t59 zab. qbje4)-fzfq :14uu1cbt j jnohe sphere?