State the law of conservation of el n*adqiuq1+w k/yudlv5xzd(1/ u)-thectric charge.

  Is it possible for two negative charges to px.8 zxm7qkd;xc dh/2attract each other?

  Is it possible for a positive and a negative charge to attract each oth0ktno* 3to:naer?

  A glass rod is rubbed with a piece of silk. During the process +lob0b;elvau f5( g djve 0;p/x. h)mnthe glass rod acquires ah; n.mjla /xuv0 e0 +5eo)v(bbfl pg;d positive charge and the silk

  A proton carries a

  The model of the atom showrk+l3x.* *fptq0v af ps a

  A neutral atom always hasfi(4dzc5 aep( bl 8wx6

  An atom has more electrons thanm)e kfpk 88i uebg6-3hb qn;h* protons. The atom is

  Materials in which the electrons are l ews1m2 vi yg /my1tznh8sn-(*(vp9rbound very tightly to the nuclei are referred t(iv -/vypw1*ymnt1r 8zg ehnms 2ls9( o as

  Materials in which the nj/zbh5d 3zg(j g- x7melectrons are bound very loosely to the nuclei and can move about freely within the material are renh3dz/ 5z(jgmj-bx g7ferred to as

  A negatively charged rod is brought near one ey(mikp d2 17z;wp/.4ean dotnnd of an uncharged metal bar. The end of the metal bar farthest from the charged rod will be charkd2wtp. /n(n e1za ympodi 74;ged

  Sphere A carries a net positive charge, and sphere B is 3,n6 ;;b7ey li mv4od g-mj n4xsyuit2neutral. They are placed near each other on an insulated t32;vsimjl64yno7n e dg ;b-yu i,x4tmable. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge akggh 30*q/zu qn electroscope positively?

  An originally neutral electroscope is briefly touched g 9 q9srvs;u s)wm;m:m8yvov*) g- iqewith a positively charged glass rod. The elecg ;8 so9svvqveg:w)*9i m-qsmuy ;rm)troscope

  An originally neutral electroscope is grounded bris( /pq4wag3h foy)/yy efly while a positively charged glfgq p)y oh3/yy/4as(wass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. yao)fnz/cs5y4s4., u c)bls s Then )c5,z f b4s/s4nays oyus .cl)a negative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively ch (kdt,8l6:hzp k,t opmarged object is placed on an insulated table. A neutral metallic ball rolls straight toward the :6kd,,k (o8zhpmptltobject, 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 on each ball?

  Charge is

  What are the units of the Ch5:h2sy fn6qx7r ;s uuoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separatgk ,dyyp2pq gd6g++;ked by a distance d. The first charge is larger in magnitude than th pqg+dkkyy6 g+,pd 2g;e second charge.

  Sphere A carries a net charge and spheregf,w fdmn v: 60.pi9yh B is neutral. They are placed near each othenp.6,y :v9h0i fmwgdf r on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects 3m:fs pkfjhvgac(*.,n7 6hpsattract each other with a certain force. If the charges on both obj6va(f*7sfngcpj sm.3h:ph k , ects are doubled with no change in separation, the force between them

  Two charges are sepafbz60 v7b,ti,mjiw:rx / aly cep9/4 vrated by a distance d and exert mutual attractive forces of F on each other. If the charges are separated by avzvi af,e4m:0yb ti/c67 9w pjr/bl,x distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force ie+idw;: c8ljF. 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 its original value? The force is noi8lid: +;cwje w equal to

  An electron and a proton are separated by a distance of 1.0 m. 0:g7cajk)bolf 8ed d2* -dx gr What happens to the magnitude of the force on the proton if a second electron is placed next to the firdx8d7k *2 afgb-: 0cjledo) grst electron?

  An electron and a proton are separated by a distance of 1.0 m. What hvuyg9 i 7nh(fwt/1-f; 9js1bwlpnej - dqz(o ,appens to the magnitude of the force on the first electron if a second electron is plac nlt hg7i- yn (pse(1vu9z qd/fobfj9,-wj1w ;ed next to the proton?

  An electron and a proton are separated by at vjuc91+sqyh jo yfd6n+:+.r distance of 1.0 m. What happens to the size of the r n+:cqj.f du9voj+h y+ s1yt6force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed76 i ggw6fxgpm+(0c7omma:s q 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 af06w(q6mggomp7+7: i m axgsct 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 e: magnu4 rc7rj;)6 pna*gkm8i quilateral 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 muk4;ga)j:nrp 68 m7a*gr nic one of the other vertices?

  Which of the following is not a w a5,r6jwgjq :vector?

  At twice the distance from a point charge, triry04n1n m -un3 x0lehe strength of the electric field

  Is it possible to have a zero electric field value between a negative anqd2q )k4v 0ofod positive charge alon2)qk4o0d qfo vg the line joining the two charges?

  Is it possible to have a zero elehywu gb8y ub(,g4w ,c*9k 0gemctric field value between two positive charges along the line joining the two charges?wh ku0gcu,8m(e , wg *y94ybgb

  Electric field lines near psitive point chargebwebax)2m8:,1 gfsoj s

  The electric field shofyb85)o) kmz lf (ow1own

  Can electric field lines intersect in u/hqro3x38zrfree space?

  A solid block of metal iaj 3lj5ml:) xyn electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's inter:a)5jl lymjx3 ior.

  If a solid metal sphere and a hollow metar(we5sj8afec6/ n .ve,h tq1al sphere of equal diameters are each given the sam.esn ,cv81hetjew 6(aq/afr5 e charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluu/)olule y20 xhjzb/+ minum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can be saihuz)/bxyj/ e+lu2 0lod concerning the charge on the block's top surface?

  If a conductor is in electrostatic eqecqus o3a1pt9 6dxux. ,;0m x ;dgno-ouilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere c wytigds ),p :/7s jhc+3jr3ethat is grounded. As compared to the case without the hollow sphere, the electric field a ,3wc3tr)h sc j dypiej7g+s/:t a point directly above the hollow sphere has

State three properties of conduct1qtaakint+t5 tn6. vxio9y6 : ors in static equilibrium.

State Gauss's law.

  The charge carried by one elect y(+7i7h(fuqd fff - 8nogk*fqron 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 moq4,70zx 4p ue mo2fvscre protons than electrons doe sco4q ,evxpu47zf2 m0s this piece of plastic have?

  What is the charge on 1 kg of protons-zj0 :eow1gpfyn8m7b ?

  An atomic nucleus has i9-d bb w ;k1bxkyn0u.a charge 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 cmab0 urbw: k*wjmg+;9p:elb8j , have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electr:bk*jjp80a;m bwbl9u g e:wr+ic force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between 8cg ; e lvsq+g19g;m/tg ai7vithem is 1.0 N. What is the magnitude of v ga;+17iel g9ggmcvqi s8 t/;the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apartu4u(7ah+hivf are they?

  The force between a acfb19bf)apa o)9si7 $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially )mmwlh+ nwb, 0/k0vpe; ssa, zc)qkc42.0 cm apart, experience a 1.0-N force. If they are movedz))h,v4b wmc+q;k0 e k/n,waspcls m 0 to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axqv4g)ankxr;s+uql:;u bq3* n3pej7 s is. The first charge is at the origin, the second to the right at x = 50 cm, and the third is at turn bx)37egsnqv4+;qj 3au;ls k:q* phe 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 charge of +2.0 mC is placed at6c+ epsfj0pm z 0),fbova t5h6 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 electrosta sfb6em50f)v6+0 ppzctaoh,jtic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC : pc .g+ap q,ffb0k,)j+zwyygat 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 f0,a+b :+kw, )pqgy.yz p jgfcthe 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a secondps3djwb 6t(a* 77e wmaaa0q2d 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 t(2*w7jtp q0 eamb3d 7aa6as wdhe 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); Q3 as v5.pc1:piq= 5.0 nC is at (0, 0). What is the magnitus. p5cq a:iv1pde of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.+ +,e :og)uoff 2h*bm8yxoqn i30 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 net febo xmy*fngif8+ h2 :oqo,)u+orce on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateraoo (b)2cn,d all triangle which measures 30 cm on a side. What is thnlob cd2o a(),e magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q an, t 6eg nw5oh)lzvk+)2x8dl atd +4Q, which are separated by 3.0 m. At what point, on a line between the x 8et l2 vgdhz6,)kaot5n)w+ltwo charges, would 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 xp t 9a(8uy.ben = 4.0 m. Where on the x-axis can a third charge be placed8en(tb.9y u pa so the net force on it is zero?

  Charge +2q is placed at the origin au vb 1:fmwumk)3512t)s7 qna hbm- dqjnd charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on i-1 q:m jk))t3s duq5uah2fw nmb v1mb7t is zero?

  A copper penny has a mass of ,e+.5cv s upn 54pcslb3.0 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)).jp ,ijwnu t6 :8u 7pwhvpva the force of gravity by the attraction of a fixed proton some distance above it. How far above the electron:p vwjtp,8)7wuu )ihn.v 6ajp is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threadl;)sdqiwajm (b;z) t5 s which are 30 cm long. Both are given identical charge)m(s ; ;q5datbzwjil) s, 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 +40y(1fpdv:x .v4pw;p pee. What is the magnitude of the electric field at a distan1.p:fpy 4 p(dwvx evp;ce of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance of 1.5 u.ru)7-pjxd cg:pyz0 0 m from a 50.0-nC chaucu j)07ry z pxg.-d:prge?

  A 5.0-C charge is 10 m from ab y8sjk4p6 q96hw g3bi small test charge. What is the magnitude of the electric field at the location bi69k4jb3p8qshyw g6 of the test charge?

  A 5.0-C charge is 10 m from a small test charge. 6+jjk3l5 9edm9 ldv da xu.h0fWhat is the direction of the electric fiel03j9 fkj 5 adl.x+ld mdh69uved?

  A 5.0-C charge is 10 m from a small test charge. What is the makt 2wbro8:1 1wn- pazvgnitude of the force experienced by a2bn-wrw8o 1z:at k1pv 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a v)4qzuhb 5mf3 h9q-up :ju,8lzou- csv alue of 3.0 C and are separated by a distance of 4.0 m. What is the elect 3bu5,48) pvu9-zoumqc qlz:hh sujf- ric field at a point midway between the two charges?

  A 5.0-mC charge is placed7uy4g0s(77(9q jcs)gpsy 9c nyc*t0 btqjjhv at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 54vypnh utjs gb yc7cjq)t*(9y gs(j77q00sc90 cm mark. What is the 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.)rd)n7 * uy/ 4k:em2othbntju0 mC charge is pl)74t/ho d:k mjb2yneur n*u )taced at the 50 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 at x = 0 and l hsm(q, 4u p8fee:wy)x = 0.20 m. What is the magnitude of the electric field at the poinqm f:(lsp4w,e)ye 8 uht midway between them?

  Three 3.0 mC charges are at the thbe4 e xe*z9.rubhn )q:ree corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the ezb:nq*eer4u . 9 xeh)blectric field at the center of the square.

  Consider a square which is 1.0 m on a side. c.jxc+*d;8 zrt ,d gbgu:ub8lCharges 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 tgdg *ub8j .d8t,cr lc zu:+b;xhe 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 is placed in a unifoo;s8jwc6vioq/::y r l rm electric field. What is the jlwcs: oo;q6:r /v 8yimagnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass o(r0cd)br0ma 6oi 6uil f $5.0 \times 10^{-3} \; kg$. 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 electric field of 6000 N/C poinsy71 iz1nb h;yting downward. What charge must be placed on the ball for it to be suspended?i1z yybh1s;7n

  A foam ball of mass 0.150 g carries a char3n t nvory2rr9yw8*an **y9nsge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the rs9rnnyrt*2 *8 yy 3o*a9nvnwmagnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. Whn a vr v+016+zdavff0tat is the magnitu 160dn ravafzt +vfv+0de 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 th85olm)id l7c k2te ss5e electric fies87)2ecmisdot 5l5 lk ld 6.0 cm from the center of the sphere?