State the law of conservation of elel+o8, l8 *h+qjwfbrw sctric charge.

  Is it possible for two negative charges to attract )y4l2 3 nsk f,;tjpywkeach other?

  Is it possible for a positive and a negative chu 1jk/9-ct-.4roeenz 4 wrklz arge to attract each other?

  A glass rod is rubbed withs,zf4lqs:sn;l 6kum2r6 nag 7 .cm o9d a piece of silk. During the process the glass rod acquires a positive charl:79z n askq46nc s orl.gs6,ummf2d;ge and the silk

  A proton carries a

  The model of the ato+jh0(xzgutm a40d- n-lkp.vn m shows a

  A neutral atom always ha tqd+x/jr.c429ugrnky)p;hf- s) j ob k)p tf.s

  An atom has more electrons than pro wbwz6c.c6uyqe . s+.gtons. The atom is

  Materials in which the electronorxfzwbvx,x0)g --e s7;*mvds are bound very tightly to the nuclei are referrvr,x- -)0s bw*;fovd xmx7g zeed to as

  Materials in which the electrons are bound very loosely to the nucleiqru*g .9 e- :fc3nboodl3* g6f 2xzwix and can move anfiog bf*uxrzg*x.69de3-:c2 3q lw obout freely within the material are referred to as

  A negatively charged rod is brought near oye4p, cp 9pr0kne end of an uncharged metal bar. The end of the metal ba,0p9yppkc r 4er farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They are placx.;tigdzz) 4b ed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correc 4tz);b idgzx.t?

  How can a negatively cb,jyup8a5tedh/ l 7re ./; vidharged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a pyo-c- vs r3 g:r,nsm0positively charged glass rod. The electroscopg3 snr0s o:pm c,-r-vye

  An originally neutral electroscope is grounded briefly while a positively cham egsuc88 -v2prged glass rod is held near it. After the glass rod is remepsv8-u8 c m2goved, the electroscope

  A positive object touches a neutral electroscope, / srby,hpfa8 74n8uez4vc2i i and the leaves separate. Then a negative object is brought near the electroscope, but does not touz,ih/8f8 rnc 7 se44ubiy2 pavch it. What happens to the leaves?

  A large negatively charged object is placed on an insulatedz(58m5+v: r6*tuyh pfau vxxa 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 ne a vmup:fhxau* x(zv5 5y8+t6rgative object. What is the final charge on each ball?

  Charge is

  What are the units of the Coulomb consdhnn:4/zh5u bf +w c6wtant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The firstpz,i2(u xz/ec cz j1s0 charge is larger in magnp /ziu2 jc x(,1zzs0ecitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed ne+m g-ztz4d:dgar each other on an insulated table. Which statement best describes the electrostatic force +-gddzt zgm4: between them?

  Two charged objects attra 6pi;r,pdpw*s ct each other with a certain force. If the charges on both objects are doubled wrp6diwp; ps ,*ith no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual atxv,a dmi9 dsu,a)e7gb3+i;d atractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mu )si3dbvu;,i x7d ,9da+ eamgatual forces?

  Two charged objects attra5piu,a.u y f qjp4a8t-2;mn luct 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 8a nf5jpu m.p2 ;i4-ulq tau,ydistance 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 dis wyt ycn*,1tuv5,-jfbtance of 1.0 m. What happens to the magnitud51 jw*fy ,yt-btu nvc,e 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 dismvr-4tf s) ,9xpj7jl qtance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placedpj 9rfjmxs-)ltv47q , next to the proton?

  An electron and a proton are separ lfvbiov- 51; grm)3moated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer r3bm-o 1o)i;vvml 5gf to the proton?

  A point charge of +Q is placed at the center of a square. Wh:reh h*rl- 8z(; jztaeen 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 az rh;t8r(zlj:-hee* 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 ec ,t*j ;3.dagyw6k))s rh 1zi5gp,khgkn to7gquilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 1. n *wgtg)r6,,;dogjgak3 5 z)yhp7hsikc tk 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 is not a vector?dfa3i; y8f .:plo6a8 yvcep 0qn73 g lui,6ior

  At twice the distance from a point charge, tz*r2 dj6+rb3u*ndbi qi2 qur, he strength of the electric field

  Is it possible to have a zero electric field value between a negative and pos rzoxap.6 +z,4v 5vsulitive charge azoz 5u,prl.s+vaxv4 6long the line joining the two charges?

  Is it possible to have a zero electricss.jcxm,5s.otv 5 x) v field value between two positive charges along the 5. 5soxmvjxss. vc,) tline joining the two charges?

  Electric field lines near psitq 3xh5 r0trjx3cgy .m1ive point charges

  The electric field shown )mfcx4 a87l;gimy sg0

  Can electric field lines ixuy k1;64a*ujm j ze)entersect in free space?

  A solid block of metal ingz/omg:j 7 afr t3j3p7 electrostatic equilibrium is placed in a uniform electric field. Give a statement co:g 3r at j73jg/pmzof7ncerning the electric field in the block's interior.

  If a solid metal sphere and a )aj(w nf0b7w/hh c :halfl4.zhollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center anjc:af )(habw h/ h7n4.fl0 lwzd the surface is

  A cubic block of alumicng :w n.g-g8anum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top s:ggn.-a 8nwgc urface?

  If a conductor is in electrostatic equilibrium n7v+ upah: ypa/ wws4.near an electric charge

  A positive point charge is enclo q-vb37a-gk3 v1 xfnmyb7f 2b:(wtqlpsed in a hollow metallic sphere that is grounded. As compared to the case witho7x-:1kf qbapg37vy(b3q n- mv blft2wut the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrix;f ss0h3w1kp )i7j laum.

State Gauss's law.

  The charge carried by oneq93(-4 f ks iow nd+f*cshjrj) electron 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 han2 r-;j+ , vwtxlyk9ahs a net charge of +2.00 mC. How many more protons than electw9j -ahrt, yl;2kvnx +rons does this piece of plastic have?

  What is the charge on 1 kg of prot:65b6f: dvhsrvi17 vwuqb l4ions?

  An atomic nucleus has a chargypqi1 o ,*(jir2;nxgd e 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 2m (bhghv3g68 u.0 and -4.0 mC, respectively. What is the magnitude of thb3hvg6u(8g h me electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between *k0z +5ze7 l8b3hsbxo2x4c-ur wyiri*1 jghs them is 1.0 N. What is the magnitude of the second charju7rsh i8bz-3lkxo ez04bs2y i+*x 1r h*5gwcge?

  Two 1.0-C charges have a force betwee 3x uob,y)s kpd,teaj8/j4x-a n them of 1.0 N. How far apart are they?

  The force between a bgo/(x s9*z rtfjkk 79$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience a 1.0-N force. If they:sh*iu28z kol)ei5 6oqbjz a do0 v+b+ are moved to a new sep i+aej+ :b82q60ozbzuk)5 ih dvo osl*aration of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC ulla a-kn ;k /3h)f6dfey60 rdare placed on 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 100 cm mark. What are the magnitude and direction of thed -lu;6 e3n kfyrlhkf6 aa0/d) electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A char1dd4p)r/pafu ge 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 whdru p1)fad/ p4ich acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.k+ 7wjx;qcp6 spw/w0 m a;mwr100 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 forwwk;/p ; 0m16j7r wwpxsam c+qce on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a second point c05e r:,o7b;(zvfe m (r ccm(7uiitg kbharge 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 chm ei;(7e( 0:7cfv,itmorkc bbgzur (5arge 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, 0.1hm)zsr )lxkq,0 9a+dn0 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude ofmxskr0lq naz,9h+ )d ) 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, z:z8 flud(hih8 p 9lv70.10 m); Q3 = 5.0 nC is at (0, 0). What is the z98p uldiv:f7 8hzlh(direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the verbw h :z//evhx + rybv5qi5cg76tices of an equilateral triangle which measures 30 cm on a sih/vqb:hc7v/erzxb+ 55 yiwg 6 de. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q x1 u2pb,/k emqvk*hr4b g wx31d9.dtzand +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 -Q such that the elec rv1,dm*/491bbxtkqp.h kuwd g2x3ze trostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +8; g yggia3hzb/6nx ;el hh0j*9.0-C charge is at x = 4.0 m. Where on the x-axis can a third c;h3eb0l*6/g y hji z xg8;ganhharge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge fzsrjl1 6 s y)318ydrirgck/ *-q is placed at x = 2a. Where can a third positive charge ysz3d scf1)i1rrry6 j8*l/ gk+q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A :32s7dp( 8ltx)ofqe g o1v fzstotal 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 av 8tk* v*ps:7w7if tcljtfm49ttraction of a fixed proton some distance a7: f 8*7wtvksct *tjm4i9l fvpbove it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a ckza3. eukt, nq4e; 7w20p90uorccq d sommon point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the anglz09c u. de3ka7cwku qp4no r0s,qet;2e between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is tf.anv1prq okz /m 966vhe magnitude of the electric field at a distance of 1.0 m from the nucm6qkrzf on1 pv va/.69leus?

  What are the magnitude and directiont5, 8p0 gh htb q;joq:f1:vwuu of the electric field at a distance of 1.50 m frg1jb:quhvw085h,o ftuq t ;p: om a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is4ii1wm a6qoyg+6; coy the magnitude of the electric field at gqmw41i y+cyoa io;66the location of the test charge?

  A 5.0-C charge is 10 m from a svy n- pdq)/ cyqldmzrt8 ;;*+fmall test charge. What is the direction of the electldznq-p8c/)m; *;ty f qdv ry+ric field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o9vwb;ld gizw8zr )*zzcf b0 uw3)u 2+gf the force experienced by a 1.0 nC chai+*)g l;zb9c8 0z3vuzdgub fzw 2 rww)rge placed at the location of the test charge?

  Two point charges each4o 6yex:zibid -(gu( b 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 midway between theix(u- 6 :gibb(zo4ye d two charges?

  A 5.0-mC charge is plunu rq q) 4ra/-1lb-yraced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is trrq)-/1yq-unal u4b rhe 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 -4.0 tvvcj4hu(c l + mgs(26mC charge is placed at the c u(l6jst2v +( gvh4mc50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.01/ )5+fgjjb jmyplw -j r 00aitouhh80 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the potbh 5uyjgap-fho0mj)lr+ 80 ji0/j1wint midway between them?

  Three 3.0 mC charges are at the three o5aj5z ij :g4ycorners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the squoga4j5 5:jyi zare.

  Consider a square which is 1.0 m on a side. Charges are plachal,2l ,1i i1zldny r2ed 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 ,l2,zihly1lnir1da2 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 it i qdjh3oc h1.r,s placed in a uniform electric field. What is the magnitude of this electric fie1 oq,3.h cjdhrld?

  A particle with a charx: vlq2 4gumnj5x7z3up7 l9x yge 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 plakm4j vhey 9*6oced in an electric field of 6000 N/C pointing downward. What charge must be placed on the bm yj*9v6e hko4all for it to be suspended?

  A foam ball of mass 0.150 j2e ,df:nd2 a4 -g2b-nhof,pvfvdm.sg carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of hd -fb gem .:-2d,o2,4sjfv2pvandfnthe electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the mapl qzn+z nd, vlx8v 8p9zy6c,3gnitude of the electric field 5.0 cm from the sph vzp8,89z nq nzy+lc,d6xl3vpere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the electrijtw3y 6jl xg *zd:o ,c.stq2x9c field 6.0 ,wtcjt 3 96*xy glo2. :qdsjxzcm from the center of the sphere?