State the law of conservation of e,6c4krp w0qeb bv/j 3ss+yu-llectric charge.

  Is it possible for two nad,8i5qmkw yd ts;c*+egative charges to attract each other?

  Is it possible for a positive and a negative charge to attract 0*/b e5 ntr+)rc2nwvv. rfz)n4ahiaceach other?

  A glass rod is rubbed with a piece of silk. During the p*x1oqr79q xny rocess the glass rod acquires a positive charge and the siony1rqx x q97*lk

  A proton carries a

  The model of the atom8s1qm)z ofx 8q9xrjv/ shows a

  A neutral atom always z pl4w0po eo(dr9n.9-hjroh, :p gll+g9/qoy has

  An atom has more electrons than protons. The atom is2y4 /hag(n l(u qtmhof:ak1xj.4e 5 vc

  Materials in which the electrons are bound yyi4sv)t 4m(o very tightly to the nuclei are referred to (ymvt4i)oy 4sas

  Materials in which the electro zimr9/i5 cgd-ns are bound very loosely to the nuclei and can move about freely within the material are referred to ad 59gici-/r mzs

  A negatively charged rod is bru stk ts bg p4,i88:v:7 fquxs0d+vr2pought near one end of an uncharged metal bar. The end of 8rkt 0tpp uvisx2,bf4v g:su8+:qsd7the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positiv uptoxs02 usvnh675wr.g hv91 e charge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grup01nsv.hw 72 6vh xrtso9g5uounded. Which statement is correct?

  How can a negatively s.czez/z s6j xo vq;*:8z3 vorcharged rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a positively cf/uy-30b jg sjharged glass rod. Thejb3 fjs 0-uyg/ electroscope

  An originally neutral electroscope is grou 0by/j 6ayfc8nnded briefly while a positively charged glass rod is held near it. After t08jyfa6 / cbynhe glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separa;t9t5q ybv68qylhg o3te. Then a negative object is broughtt q58qy6lh ;og9vty3b near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table.,gtsldzn *: hfi32r*r 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 *rsn3fi2gr,ldzt h* :time does either ball touch the negative object. What is the final charge on each ball?

  Charge is

  What are the units of the Col6kri/i b3:x a1 64i00xfdtms* nzmc julomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger 5cnqo ind. 6c)in magnitude than the second cc5qoc)nn i6d. harge.

  Sphere A carries a net charge and sphere B is neutral. They are placed u k ig2 2gcaf-( zgn:fx)d+c-anear each other on an insulated table. Which stat-fccd xiggf(gaan2+2u) z-: k ement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain f((p r8 3cxi6(hcyasgp orce. If the charges on both objects are doubled with no change in separation, the force betw(3p(g8 rc sxiha(6pcyeen them

  Two charges are separated by a distance d and exert mutual attracti:,r4upgmt .h ,gub t,lve forces of F on each other. If the charges are separated by a distance of d/3, what are thu t4gr.h,mt u:, l,gbpe new mutual forces?

  Two charged objects attract each other with a force F. What happensj pwnvu q3:/8w to the forcej3n v/pw uq8:w 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 now equal to

  An electron and a proton are separated by a distance of 1.0 m. What hav+ 6h.05wkg 1xlbxg)klh e f hw6k8-hvppens to the magnitude ofe 1x+h0 lh5khfkwk.8 w6-vbx glhgv)6 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 distance of 1.0 m. What happens to .eehrf: .n1 uythe magnitude of the force on the first electron if a second electroyu .ee1f.nh r:n is placed next to the proton?

  An electron and a proton are separat)edg18eo c1f m0els o6opk*4 ned 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 cl18cf* po0gkmd le1)eo es6no4 oser to the proton?

  A point charge of +Q is placed at the cea-6w axt *ngvqdc5 2k(u/dkd-nter 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 force acting on the positiv-w-xun/qta(* vkg2 cd6adk d5e charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilateral triangle. Whenmuaz2vrv+ -3hp 3pc2x 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 urp2va- 2+hz 33cpmxva third charge of +Q placed at one of the other vertices?

  Which of the following lh;mzg/a0x4 g is not a vector?

  At twice the distance from a point charge, the strength of the electric avc9 l z5c-r9sw /)klpfield

  Is it possible to have a zero elec2n1ofxy gu( l.(qw 0qbtric field value between a negative and positive charge along the line joining the two char ubnx(.q f g1(qy0wo2lges?

  Is it possible to have a zero electric field +rsljd dv6* s*tq( f(gvalue between two positive charges along the lil(sds(**6 f+ rv qjdtgne joining the two charges?

  Electric field lines near psitive point cha , daiji1j )kmgc)9gg(3 rbk;urges

  The electric field sho1 nkij6z a;oi4ct+3lf*o,ue bwn

  Can electric field lines interse u1irqf7p x;w*ct in free space?

  A solid block of metal in electrostaxq/2fbr,q .qv; y14oqiln c.dtic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in thq . yqvf2,qo/bx 4 qlinc1r.d;e block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are eah2wscrkzt.esu y28/ u. y *.lfch given the same charge, the electric field (E) midwayytz* 2/28.flswr eusu.k yc .h between the center and the surface is

  A cubic block of aluminum rests on a wooden t:kq gge td;;ch/u+7rkable in a region where a uniform electric field is directed strduek:/ ;ggc;q+t7hr kaight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrosyqf *1,zf*0rtw 8, kvdjdj/vg tatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow d 6tt4eabh3 j0metallic sphere that is grounded. As compared to the case withoudbt4 0haj te63t the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in static equilibrium.*3t8i 55j3thi nqlzl:q *m ip -ozo:ue

State Gauss's law.

  The charge carried by one electro/af0u o e.jqo9 i:hhrx*u/ 1ufn 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 r9i kq,x 9. r9o8rrwhrcharge of +2.00 mC. How many more protons than electrons does this piece of plkr,99wrr8r rxiq.ho9astic have?

  What is the charge on 1 kg of protorwn9 wcl24f 2bns?

  An atomic nucleus has a chan y*ba6ug vqq*pw;+ o)rge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, sepam/n igo t8vw11rated by 1.5 cm, have charge values of 2.0 and -4.0 mC, respe11 go/w vn8tmictively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15z+mw -yuo(:f 2rm-gk9 hbyaz * m from a second charge, and the force between them is 1.0 N. What is the magnitude of the second ch2h 9r+(z:y mfkw-by zo *ua-mgarge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart)p ym 05hmx.my16lxd z are they?

  The force between a gybdu;iwl/n/ h+uxkh y7 6r6 +$30 \; mC$ 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 arek8jj d:7ww2 me moved to a new separation of 8.0 cm, what i8w:m jdw27e kjs the electric force between them?

  Three identical point charges of 2.xfaf ;8uv 4ux+wyu :;i0 mC are 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 the electrostatic force which acts on the+xuv;yu 84a fw:x;iu f charge at the origin?

  Three point charges are placed onp/ (m1-j:hyhdpb 3ldrco 81 hl 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. What are the magnitude and direction of the electrostatic forceldd3 l-:b( /hy c81pph hjmr1o which acts on the charge at the origin?

  Three point charges are located aafy o.pm 3:c7m 4 vru,a+shaw-t the following positions: Q1 = 2.00 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,- hmc:m sy.7owva4ua3raf+ pe on the 3.00-mC charge?

  A point charge of +Q is placed at the centn y l+4n+daml:er 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 is the magnitude of the force that acts on the center charge if a third charge of -Q is placed at the lower-left n nml yd4:+l+acorner?

  Q1 = 6.0 nC is at (0.30 m, 0);,eo 3b1h1 vrbyu ,nkh) Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0,uro h) k1n bv,1y3bhe nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at su3rsx;* jnmk i7u82n(0, 0.10 m); Q3 = 5.0 nC is at (0, 03nrskmxu 27;i *jus n8). What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertic/zqlyl pcrdr +4 64fj,es of an equilateral triangl4/r pj q+4lzlyfrcd6,e which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, s -59f b7uxakbwhich 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 electrostatic force acting on it would be zerob a-fx 9ks7b5u?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. Where onkxd6jaeep:h77;5j21l lcv*e bf; xk x the x-ahk fvxd7cpj x;k*ax:lleb 16 7; 52ejexis 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 at x = 2a. Wher3u55mn2l kzh ue can a third positive charge +q be placed so that the fuuz2m53k 5nh lorce on it is zero?

  A copper penny has a mass of 3.0 g. A total o. xhjhh0.vijz7bk33y*y g,ygf $4.0 \times 10^{12} \; electrons$ 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 th7y329dptkk 44sa 4 iviet.egee attraction of a fixed proton some distance above it. How far above the yd27k43te e .epakiit9g44s v electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threads wg3z -*15pufp6 iqrid jhich are 30 cm long. Both are d1 r35 ipi- fz*pgjuq6given 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 +40eucaaz r(a)jau9d) wj0kk4( q ,. What is the magnitude of the electric field at a distance of (c0), qdkra (ja uj9)a kwau4z1.0 m from the nucleus?

  What are the magnitude and direction oozt(pni94/y qstps v -jyv(6udx3 8,sf the electric field at a distance of 1.50 m from a 50.0-nC charge t3y 4 xi(j,9s o pt/py(n6-8dssuqvzv?

  A 5.0-C charge is 10 m from a small tejgzuoj 988; u:gtbift+p * e(tst charge. What is the magnitude of the electric field at the location o g 9+jt; tt*(guei8bpo8 fjuz:f the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of the e m grm-i,/cazf1)v6xqlec6,mqcfa r) g/mi1xzv-tric field?

  A 5.0-C charge is 10 m from a small testr wbuo17n ( lox +0iw8/l/fxzt charge. What is the magnitude of the force experienced by a 1.0 f/0 ix l bt+zw(ro78o1n wxul/nC charge placed at the location of the test charge?

  Two point charges each have asprkh2 a8n a0q ew:k:/ value of 3.0 C and are separated by a distance of 4.0 m. What is the electri eaqr8 pk /h0n:kas2:wc field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and o1n*j5flm 4bv/+z umsa -4.0 mC charge is placed at the 50 cm mark. Wh un slm4mobz5/jf+v1*at 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 an139pc irc+ xkxns : *sa;sb*qxd a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining th*cx1qa nbrik+:c s9*s 3px; xse two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 -l4mrjzye4v5 and x = 0.20 m. What is the magnitude of the electric field at the point midway 5 zrml 4yej-v4between them?

  Three 3.0 mC charges are at the three corners of a sq/loq tg h/5m/r vrd/r6uare of side 0.50 m. The last corgrhqrdm5/ //l ov6 /rtner is occupied 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 3flq4ty*,9a y84 wlnzu l:v;x0fwmtzat the corners of the squ3u,wl*8 twzl4 9;0tyqay4v znx:mfflare 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 center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniu6q6a uvmdm-9n7e-xoh r3ty9 form electric field. What is the magnitudq3x7 ymrutv-a 9d m66oeh9-nue of this electric field?

  A particle with a charge of 4.0 mC has a m1z s2mikrhm7yk.4 -g n3s-ou yass 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 electric field of 6000 N/C poi5j e pcc 69k sx: uo17he.zle12pv3fhyn3vpzy f7ck52 eh91 xe1o6cj. spelu :hting downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries x: 7luhb ogxp05x 2h 91wnih4ma charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are th:nh5 iux2o94x bp0h1x 7glwhme magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a chahvj 7wnml -qije/sq dx52h.73rge of +2.0 mC. What is the magnitude of the electrie7 l ihs.52w jqnd7xm j/3hv-qc field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. Whaex.c: nfibm0778yp. mpr*u yat is the electric field 6.0 cm from the center of the sphere y7.p8rax mm 0cpn7 .i:yufb*e?