State the law of conse mdn+ktxnsi(2z lm45 tq-(m7s8o kcm/rvation of electric charge.

  Is it possible for two negative ch;x s6x6cau 9m,px:af -sa frfd qqy309z(si7earges to attract each other?

  Is it possible for a positi-6*9 e s9ikld(rbguywve and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod :. g zvtmub+ijar5)u0z se-/dacquires a positive charge andsa5-:)i u0bvrtz eu.m/j +gdz the silk

  A proton carries a

  The model of the atom eh6,9xg /:nc spi z:tishows a

  A neutral atom always flk4bjja+1x;pq1 ;)qg3ibk mhas

  An atom has more electrons than y:p n3h(x :byjh/)hy bob5 ru1protons. The atom is

  Materials in which the electrons are bound veryvt toe.10zdug8iamrcd ;2m9ec1 k8h. +phkx2 tightly to the nuclei are referred to hrd82 h vtp98umokz1gkcxe;dm +e0.ic .a12t as

  Materials in which the electrons are bound very looej x5rk fq5(+wsely to the nuclei and can move about freely within the material are referqjfx5e+ (k5 wrred to as

  A negatively charged 4d n*h biq:fd2rod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod*n4diq:h f2 bd will be charged

  Sphere A carries a np grf+ l;e5(nset positive charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touchf( e5ns+lg;pred with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively?q)42 eey. 9lbrxw+rg r

  An originally neutral electroscope is briefly touched with a positively chargt:kfd k ;u1:s .g5d9ehprdqk8 ed glass rod. The el1u 5;: kpq t8krd9:df.gedskh ectroscope

  An originally neutral electroscope is grounded briefly while a positively - i*9cx( /3y ,ggt okcisf:wkacharged glass rod is heldw,gia(tio9g y c*x3c:/s-kfk near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electrhteoc1lb:0s9 n+qdh:0m g:pj, 4 pxgf oscope, and the leaves separate. Then a negative dpc9n ml gf,h :tq0p:+g h b0o1x4esj:object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged obje)nk 05ovjzh8 xvmo;d9 ct is placed on an 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 touz58om;jhvkxnv0) 9 do ch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of ta,0/za dnklykh 58w 4khe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger)9c qtu 3w edc4gna3h, in magnitude than the second ch)9n twqch3eudg3 c 4a,arge.

  Sphere A carries a net charge and sphere B is neutral. Tun;jal.vf n 7 i9cij5*hey are placed near each other on an insulated table. Which statement best describes the electrostatic forcjii.n5 na uj*fv7l;9ce between them?

  Two charged objects attract eachs8- q2l+wd 5oxt aa(r5yd k0gt other with a certain force. If the charges on both objects are doubled wat g y+rq s20ow8ka(d5lx d5t-ith no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive forcek**9u pzw, biezxt,)3dinn)es of F on each other. Ifi idp,)kt unw) z*b*ze9,x3en the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other w qgel6r a6b(c*ith a force F. What happens to the force between them if one charge is doubled, the other charge is tripledq *cl66 e(grab, 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)oi iz79-. *n evhzugr 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 first elec.h9 7ieziv ru *zo)gn-tron?

  An electron and a proton are sr:v,c a 1nrz*+tbqj r2eparated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electronarb zn*2tr1vrj c +q:, is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. q;p, 2qx7nkd 0 aqbj+pwf)ab;What happens to the size of the force on the proton if the electrb kqpnf20j+x ap;; q, )q7adwbon is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at w6*ws (n/g15wnth blb.z(zez 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. What is the magnitude of the net electrostatic foh1z /s *nbwt.wnbe (5zwgzl (6rce acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral trianumt3 ,i2,isswovw., ugle. 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 c omisw,,vws iu3t,2 u.harge of +Q placed at one of the other vertices?

  Which of the following is not a vectorz k*s /6s/esuh?

  At twice the distance from a point charge, the strength of the el;r*j:b3r: ya tlz+ mypectric field

  Is it possible to have a zero electric field value between a negativbrag4ggwo x.;wq36.zl 0:n l+ p5eg xze and positive charge alon+x ;.e gqzon gggwlb65:.palxr 03zw4g the line joining the two charges?

  Is it possible to have a zero electric field value bet4( z:fjy e/cwn3s5fyk0x si0 r 9/urcwween two positive charges along the line joining the two chargescf/zrkjryfs we4w c0uy/5:( xsn i30 9?

  Electric field lines near *dc+s l )cv9rrpsitive point charges

  The electric field shown ll 6si9v i0dl*:tqmif8 6 6su v)1b.nvpzmm5 l

  Can electric field lines intersect in fxybv2q8 j jd,yhf:1 +o1jp0fe+7 q tpjree space?

  A solid block of metal in electrostatic equilibrium isl i))kt gqo)( vj)hrq3jzr0s1 placed in a uniform electric )z lq0 osg3)1rtqih v)r jj)(kfield. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diamedg 6(davqv8z 3i60aay okl*9gters are each given the same charge, the electric field (E) midway between the center and the surface0izv6ld9a gvy6ak3q8 (og*da is

  A cubic block of aluminum rests on a wooden table in a regne,he gdyus o-9gnz9z 4kmn1p0sz1-- ion where a uniform electric fi y0pz4ehgn-u nog,s--1d9nmz sze9 k1 eld is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near 5h02(*v k+px/ u.klxuts mukw an electric charge

  A positive point charge is enclosed in)02s*c6gx5h ghrwtas a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field athc 2 6txg ga0rw5h)s*s a point directly above the hollow sphere has

State three properties of covb:6ksf, pl w3nductors in static equilibrium.

State Gauss's law.

  The charge carried by oneajbv+ :1)oq zb 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 has a net charge of +2.00 mC. How many gs*6 gerpp3/ n7 3/t vsoc2wegmore protons than electrons does this psg2r/7o3ev/ 6w g*nspg3pt eciece of plastic have?

  What is the charge on 1 kg k7p*: :*,qt yonp drciof protons?

  An atomic nucleus has a charge of jx wrdqz*j4kr3l-8v+ $+40e$. 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 vh)f oly b,f0f/alues of 2.0 and -4.0 mC, respectively. What is the malfyb)/0 f h,fognitude of the electric force between them?

  A 1.0-C charge is 15 m from *ae*29zdr ue thw a++qa second charge, and the force between them is 1.0 N. What is the magnitude o+ze 2w9aa th*+u de*qrf the second charge?

  Two 1.0-C charges have a nj-yllwq7 , kl*83 ngrforce between them of 1.0 N. How far apart are they?

  The force between a ;ti5b(c)dab4lutn+ eilw,9q$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience +n gpyt;w8j3 ja 1.0-N force. If they are moved to a new separation of 8.0 cm, what gnt8p3wjyj+ ;is the electric force between them?

  Three identical point charges of 2.0 m. ak)apl7h0 92nbgg w1hldt0iC are placed on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the thi29 it)p 0gwl 7l1nhh0dak.g bard 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 char 4w8lf1 v7 bu55pz)ylg0oioc gge of +2.0 mC is placed at th47b zogv)5 o0il51y lf8guwcp e 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?

  Three point charges are located awh)wqh5i,h z:kb :h 8rzdk6k 4w d(2uut the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.08wqu) h2bh z5z iw 4k :kdhdh:k,6rw(u0 mC at x = -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 squaref0+ka na .wo0q, 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 third charge of -Q is placed at tha a0ok0.nfq+w e lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q s9+tfa;vivm /3qv8c4(yt2sj r ;al ll3 = 5.0 nC is at (0, 0). Wvq svi(t;;fv9l/j4c3y 82rl m +taaslhat is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -cev9rd0pt8 tca2k *wq9 l./zx1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What c2cprdt9w8l.k *teqxz9a0/v is the direction of the net force on the 5.0 nC charge?

  Three identical charges 2u gfkrgsd7brbo 1+b8 4 ;sk/tl7s rl2of 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnituddflsrsub7go 82r;ts7/ g+k4b1 2lbrke of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. ou9mgj o57f oom6*lp7 At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be z67 9oujoflmo7*gp o 5mero?

  A +3.0-C charge is at the origin and a +9.0-C cht4 hydbv:.q i4arge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zer:h4vtq4 .yi bdo?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wher1(aqm /( xc(mxuib ..sebjbf8e can a third positive charge +q be placed so that the forcemie(8xsuamb.1bf /jb . qx( c( on it is zero?

  A copper penny has a mq haa.i4 b1w)wass 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 attractiyyv o/2r12u dcon of a fixed protonrd 2y2yc 1uv/o some 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 th07 osrg sm;n)8g*mmbhreads which are 30 cm long. Both are bh s0mmrso8*7n)gm g; given identical charges, 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 is the magnitude of the elechl mo1n6. +;qjh rj4bftric field at a distance o n.hof46lr1hmj;+q jbf 1.0 m from the nucleus?

  What are the magnitude and direction of t7 g yi92h glkpej 0p4*rnx*kfh1a9 h9phe electric field at a distance of 1.50 m from a 50.0p2 nxya97hhkgpr* j* i k9glfhe4p901 -nC charge?

  A 5.0-C charge is 10 ml r2 .)cx/quzmtn,:mlyi)w4 g from a small test charge. What is the magnitude of the electr)yw/qlx. z 4nmglcu t,m): r2iic field at the location of the test charge?

  A 5.0-C charge is 10 m from kv fn ag9dnw(p.8fr11v ihp), j7t5xpa small test charge. What is the direction of the electric .fr8 gtkh)1n7n,1dip5avv j9ppf x( wfield?

  A 5.0-C charge is 10 m from a small test che8mbbx .y9q/ tndh5w/arge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of thee/ mqbb.w /x9t5h dny8 test charge?

  Two point charges each have a value of 3.0 C and are separated by a dista9ou ppo n4*)sg r;0 pxuo51jpbnce of 4.0 m. What is the electric field at a point miux;oob pnps 45rpp *0j)u19godway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick ann0 o0ez jcdlhblp261( d a -4.0 mC chargel6 o2hpz0den(cb jl01 is placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm yd+k mm2h /jbu9/;yqrmark of a meter stick and a -4.0 mC charge is placed at the 50 ud kb/y2ymq/m9j h+;r 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 -7.0 mC are placed atp,k5k(.u*9u:p-zqpl 2i c x cpfo8gnv x = 0 and x = 0.20 m. What p p,gpu: kx8f.cl kzvo*(2 pucn9q-5iis the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges arc-4e4vp s.o ,vds7 qm cx9ysv2e at the three corners of a square of side 0.50 m. The last corner is occupiec 24s,d-p y se7v4qvcv 9oxs.md 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 a3/;tz3v xa o/d7p et4plzg5 wkre 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 fz/pe5 z33 xl vkad74wpgot;t /ield at the square's center?

  A force of 10 N acts on a charge of 5.0 bl0uvaxp5 * 9hmC when it is placed in a uniform electric field. What i vl*b0xha9u 5ps the magnitude of this electric field?

  A particle with a charge jft2mws. kp2f5ww4 0i 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 0.1d-- jhfav1g;n 20 g is placed in an electric field of 6000 N/C pointhd jgv;-an1f -ing 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 -d-4c1+hoy pal0 j zoo/2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force oylo+/j0pz-4dc 1ho oa f gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10jo*js+ pks* ivq go/95 cm carries a charge of +2.0 mC. What is the magnitude +ooks*s *j gvji/pq59 of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the el4 b9lrd3 na4fjjus( l0ectric field 6.0 cm from the center of thel 0arjd4b ju(sn439 lf sphere?