State the law of conservation of electri )xd po9l/kb)cc charge.

  Is it possible for two negative charges to a));u 3/ :i3zmhrlvapgas t8gcttract each other?

  Is it possible for a positive and a negative charge to attd,-(xsvbw i5fract each other?

  A glass rod is rubbed kv.)c afvg6p6(vx lf2( /iblcwith a piece of silk. During the process the glass rod acquires a positi6gv).(plkac6iv f(f x2bl/c vve charge and the silk

  A proton carries a

  The model of the atom shows axfi7p8b0v ed7v1nhnh:7 qy y4

  A neutral atom alwayhrddi 30kcckwt*48g88j v ntu;4 t 9vys has

  An atom has more electrons thanzfwf6 -7ysdk;ki9 fjmqyj*:2 protons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are r/ wlg 47) .dpmz .aneoi3yxuu9eferred tol / .xoe4 dg)u.inp3uwa zmy79 as

  Materials in which the jkse5 hivdw 6 du vk+/)l(ds;4c 3f/ctelectrons are bound very loosely to the nuclei and can move about freely within the material are refecudk4l ihs63+/(dt/v5d )cf eswk v;j rred to as

  A negatively charged rod is 6+km nkp.ng* g )uu+9cuv9drnbrought near one end of an uncharged metal bar. The end of the metal b*9nmdkc+unn upv.9)+kugrg6 ar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B ia,9 ygx8 gpoz9s neutral. They are placed near each other on an insulated table. Spher9gagoy p zx89,e B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged :m3.y 0)9qqavtgus a4f:myzi rod charge an electroscope positively?

  An originally neutral electroscope is:uywhq466 p kr briefly touched with a positively charged glass rod. The electroh6 q6:rwpy ku4scope

  An originally neutral electroscope is grounded briefly while a po0g 3o1p*d e1eliy lm*ubk) .iksitively charged glass rod is held near it. After the glass rod is remov.o 0k31 i *p uide*beygk1ll)med, the electroscope

  A positive object toxqndqhr51dbg /aw6/ 8 uches a neutral electroscope, and the leaves separate. Then a negative obj5 /dqg6qbr/1 8 naxhwdect is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated 0plcnqj e8e / wcsdmd0rom/mo 2(i8*2 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, strik *c i 00m8q8(deo2p2dcml mwen/rjs/oes 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 con(v;v/r l r9 h/ v/lu-kakrhks9stant $k$, which appears in Coulomb's law?

  Two charged objects are sepa(55xk.( xwlpwnjv k.frated by a distance d. The first charge is larger in magnitude than.5(vfwxlwpkk n5jx. ( the second charge.

  Sphere A carries a net charge and sphere B is neutrhpc5o 4f/.a/ qka/p foal. They are placed near each other on an insulated table. Which statement best describes the electrostatic force betw/oc a.4/ fk p/hpaofq5een them?

  Two charged objects ao/iox0h p*o ; mvyoro1q881up ttract each other with a certain force. If the charges on both obvu 1*/ioo0p 1ho88p qxory ;omjects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exertt6+mti-)po zv mutual attractive forces of F on each other. If the c6tt)zim+o-pv harges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the 5 n1ppc5 jxc)mytx6lxjn 70y -force between them if one charge is doubled,0-j 7xxc tpyyx5)c65n1l pn jm 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 separatec-g vz,4jdwdct/rr, , d 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 first electrwz,,cg- dtjrdr cv/,4on?

  An electron and a proticsj1o l2 k+k)on are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electrkljis2ko1) c+on is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happens zom /97(hgagl u n: )r27pccnjto the size of the force)7horc7 l z:9(c/gnuamjpg2 n on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is pla+bmgn-1-e:qhra: y s oced 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 at th+gm:1 -qbh e:n s-aoyre 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 eqimbtq))da o 3 ),( uwlc),xtatuilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an ele mt,oq w3) atd,lcx(u)a)b)itctrostatic 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 one of the other vertices?

  Which of the following is not a vectorevwg// 11vbbv ?

  At twice the distance from a point charge, the strength of the 3w kx,srij. :oe x;pi,.x5rvoelectric field

  Is it possible to have a zero electric field value between a negative and positi 4mvz: mhd sqzwy:r1,/ n61antve chargnhzy1 r,t6 qd4s: :w/avzmm 1ne along the line joining the two charges?

  Is it possible to have a zero electric field value between two posit /:/zescmj/i,a5m piy ive charges along the line joining the two charge ,/pmcsyiamz/5/ ej:is?

  Electric field lines near psitivesm0 m;grm.qwisam+ 0/ point charges

  The electric field shown/* 37r z3 bikivs1:ik;jendxm

  Can electric field lines interse o kjg:pxqn(l,5 w14pzct in free space?

  A solid block of metal in electrostatic equilibrium is wookz4 0z8pw:dc6 cbx:h plyp4n/j /2placed in a uniform electric field. Give a statemh08:ko4o/p:4 w ljyzn2z wpx/c 6dcbp ent concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters are each v9:*,puxmaid x*ov six.h 7 t.given the same charge, the electric fieldud.a9t7 sio,pv *h*xx.v: mx i (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where ah.wzi0v:6qo c uniform electric field is directed straight upward. What can be said concerning the charge on the block's ciw vqhz:6.o0 top surface?

  If a conductor is in ee1vr cpie8)z-u0w;kllectrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere (uc:yrdw +6ibm./mn*vo9wmi 7j.y r*fn1 uiethat is grounded. As compared to the case without the hollow sphere, the electric field at a point dirromuu**:. 7y6 dmew +v9y1 (j .icrbn/wimnfiectly above the hollow sphere has

State three properties of conductors in statdo,omzl**7s*1fio vt ic equilibrium.

State Gauss's law.

  The charge carried by one electron is j j01l4 8md ,uuf2fedg$e = -1.6 \times 10^{-19} \; C$. 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 j fpe-2 ty8 nxs4kof/n*pw*u hocy5(5. How many more protons than electrons does this piece of plastfxh5y2no 5o(ns/8*w typ f- p eucjk4*ic have?

  What is the charge on clbqgm g.w50a1d9 rq, 1 kg of protons?

  An atomic nucleus has a c70mzbqb;lqe(d*4t2smx r3 fh harge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by 1.:vv:2xvnqo i)rp 4 l-w5 cm, have charge values of 2.0 and -4.0 mC, respectively. What i4nv xvw2ivpq)-o:r :ls the magnitude of the electric force between them?

  A 1.0-C charge is 15 m fyxh9p c) 0v p,mpu5z1arom a second charge, and the force between them is 1.0 N. What is the magnitude o 9vx,5uphpz pc0ma1 )yf the second charge?

  Two 1.0-C charges have a force between them of t*g1 hhz65wlr1.0 N. How far apart are they?

  The force between a ;0aoyn bfwc50u(oaj-l g mis9js1a)*$30 \; mC$ 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 thumw2uywwl8/ 3:7j 8bynqxk 7f ey are moved to a new separation of 7yb8 8wl 2jyu7/uw fkmxq3nw: 8.0 cm, what is the electric force between them?

  Three identical point chargl*o us)l3 dh( fk,fim2es of 2.0 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 id2mso(fful, kh*l)3is 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 charge of +2.0 mC is placeeeqcc 1s65+9 le zihx5d at the origin,1+c 5eilhzqees6x 5 9c -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 at the foll 6s8rf a/vp2deowing positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC ae 2a6p fs8rv/dt x = 0; Q3 = -5.00 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 squarec-i;i:hq,j,p df l h2g, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic f :;,ig2ijhc,h- fqld porce 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 = -1o8 qz3b;geq os7n 0t9m.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude ofz s 03g e98notomq7;qb the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0. )rkk-ewqo,b-vn8 iy 130 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whiq8yvek-w ro n)bk,-1at is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an e5 n5u)uk2 hyxtquilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the khyuun52)5xt charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m80a.l3kw3p bsfy) gjg. At what point, on a line between.8j g)3bgps3 wafyk0l the two 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 x = 4.0 m. mwqx sts7n)*vr i;zw(*6v 8sr Where on the x-axis can a third charge be placed so the net force6 sz;tvnrx w7r )s(**q8mvws i on it is zero?

  Charge +2q is placed at the origin and charge -q is plahy1s /ba4lw gj+s pe91ced at x = 2a. Where can a third positive charge + 19e/jbw yh14sgplsa+q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A t/i c.)r3s6ug2npt h,9 abtzukotal 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 agai*0;m a tlx.mb,aw;laxnst the force of gravity by the attraction of a fixed proton some distance above it. How far above thm0abm;, lal;a*.wxxt e electron is the proton?

  Two 0.20-g metal spheres are hung from a common poinvx /. 9os+rjdrt by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostaticr9 rjx/vd.o +s 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 xzj 1 k)9ypw4iof the electric field at a wi k p1z4)yxj9distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the vth , p-tt5j/melectric field at a distance of 1.50vt h-/ tp,t5jm m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magwtzirk/dlcl-f, up9iezv ::ay*/ 2z2nitude of the electric field at the vzk rz a t2fc :*w/2uly9il:zpdei,-/location of the test charge?

  A 5.0-C charge is 10 m from a small test i3v /kimwyhp: +cgllg r.35x1 charge. What is the direction of the elgir.:xm3 5 p3 v/gcy ilw+1khlectric field?

  A 5.0-C charge is 10ier8)/enc,b 3zqeycw 2 m (a1t m from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed aqw 8e)e/1 c,y tbmi2cn(ra3z et the location of the test charge?

  Two point charges each havm+ to j(;lig9awt2 nv/ x4se:re a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a point midwalex4in: vgt+a(2t;jw /m9 or sy between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.0 mC chargu -; d/x/s) gprql3sfke is placed at the 50 cm mark. What is the electric field at the 30 cm mu ;/x3 rklp)sfdsq-/g ark?

  A 5.0-mC charge is placed at the 0 cmn)s uj- b e;rgvl z/6v.jh)0wy mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what p jev) w/ 6rvslyjngz-u);hb.0oint 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 x = 0j,klq/ einy( 1.20 m. What is the magnitude of the electric field at (nyqle, 1 kj/ithe point midway between them?

  Three 3.0 mC charges are at the three o1ir6qj c r/fi23.bdw1w9ju+:glut b corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at 93+:q/b.jt gwjurul i12iw c6frb1do the center of the square.

  Consider a square which is 1.0 m on a side. Charges ar)lijj moiph7 1p5:yj 0e placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1, 1); ijl 1p0p:57ijjo)yh m+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 ivxgjq:mk(k p, fz2b6y xi4r. )s placed in a uniform electric field. What is the magnitude of thixvfkx6i4 p yzjqr(mgb,:)k 2.s electric field?

  A particle with a charge of 4tr(8 ud+gwj5jtr;r)2 )m+0dnvby0: zd p lssw.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 placed in an electric field of 6000 *)v jlge7au 1mm.1dknN/C pointing downward. What charge must be placed on the ball fo.jmdmveng1 1 *aul k7)r it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. Trl+eh4ol4ah k5j oi6) d5;sdzhe ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude azjih rl+4645eok;hoa5d d )s lnd direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC.ny2 ezqe6 ;bqp)h8a 4e What is the magnitude of the z ea 6p)4b8;y2qheqneelectric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a.(4meqgpeq 1a charge of 3.0 mC. What is the electric field 6.0 cm from the center of the spherm qp4.(eeg1 aqe?