State the law of conserbe 9aggzg ,:h3*s+1i te,zg ut szb49n :efk.vvation of electric charge.

  Is it possible for two newk* 3 ux,wc84vsq,b amhbw*v*gative charges to attract each other?

  Is it possible for a posiy no5 /nt-tf/;+j-appc9j; 1 ep/cd n*sqpzbftive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the:ca 1k*g6 nx-rkaats2 process the glass rod acquires a positive chark:x1t-k2cags6nra* age and the silk

  A proton carries a

  The model of the atoma.y /e6j0n7r+xi)h:j q rm;zdtq1gafiyd * .s shows a

  A neutral atom always*e tmeb3rxkzl 40(la. has

  An atom has more electrons than protons. Thetgx96ebcl(04p/)db tic 6wv y atom is

  Materials in which the electcpg g/ ieuo;6l /ocyt5v(4- zbrons are bound very tightly to the nuclei are referred to au5t 6-yp /( lg4/ei;ozocgbv cs

  Materials in which the electrons are bound very loose6:. x0*od8 ao-sszsrp za*uksly to the nuclei and can move about freely within the materiad8ap6kzs-. s*s zor *x0s:uaol are referred to as

  A negatively charged fm1y/ rjlr-t ,rod is brought near one end of an uncharged metal bar. The end of the m ty-fl/, mrj1retal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is n*;r1 efz6q6mi vp) kvxeutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which sfmp;*v ex6 kv)qr1z 6itatement is correct?

  How can a negatively charged rod charge an electroscope p zhef*7 6gs1vpositively?

  An originally neutral electroscope is briefly touched with a pppcyyz8 )cs 7q ),)ee/knnu6xq o g+,eositively charged gla,/q8c 6eo),y u)c+k eg7nye sxznp) pqss rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positq*( ;jzt7 dul*6i fx 14lz.oxmhbnyf)ively charged glass rod bx7hz1 yzml**q;.46uof ixf d)ljn( t is held near it. After the glass rod is removed, the electroscope

  A positive object touches a nnk/8*76 kv0wkv j hkq9qqc8lk eutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch v/kl7j9q*v88wk hq0 kck6 k qnit. What happens to the leaves?

  A large negatively charged object is placed on an insula 7-jkxnb y0qed 6ncb60ted 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 fy- 0j6 bx 7kqc0dbnen6irst 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 Coulom4 n38.unza,s- nl jgsab constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charm.20zway yp0bge is larger in magb0yzpm.w 2ya0nitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. Theygz1iph,r ; ay1+dibtq* 9dq+u are placed near each og, +iprdt ba+11 * uqqizyh;9dther on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a cfn xn(,96nz h.sz, nvxertain force. If the charges on both obj 6 ,ns,.nfn(xn9zhvxzects are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive fv t *dr*t h+ryhaod*:,orces of F on each other. If thedrh+ **r ahtt,dvy*o: charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each o l30b2 unue xcy ewpc;+5(5a;bjqs(zgther with a force F. 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 ix(20p5y a5(bl+z cu;ne ;sg wec3qujbs now equal to

  An electron and a proton are separate2 lu/1;-e ,mn2frsscj x7 euecd 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 elec- e1ejsmsr; cn72fu ,c/2exultron?

  An electron and a proton are ro f 2wjsw o8dw.1y5p.y, ,knuseparated by a distance of 1.0 m. What happens to the magnitude of the force on t2 pyurfk 5 8j,ydws1wo.n,.owhe first electron if a second electron is placed next to the proton?

  An electron and a proton are sepnnoo k2xnn6+; arated by a distance of 1.0 m. What happens to the size of the force on the proton if the electron 26koo ;xnnn+n is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a squa3xawch.y e4; *m c p,9sjcfw8qre. 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 sq 9 exw; jp4.msc,c*a ycfhw38quare. 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 place kt4bg:xa czd;ac)3(slx- ub) d at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an el-ga;d)k(czutsxb)x :b la 3c4ectrostatic 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 ikvl4 8u00 j7udivnm/r s not a vector?

  At twice the distance from a point charge, the vxjg96q.rcq 4a.zq:n 7jphh5strength of the electric field

  Is it possible to have a zero electric field valkubg p7d+pqd* 84qyd . ya27/gvvjt5iue between a negative and positive charge alonktubpjpd .8v 4ydv2+gqig ayq77d 5*/g the line joining the two charges?

  Is it possible to have a zero electric fieiw5:nroceb2yf 8 :- hzld value between two positive charges along the line joining the t 5-h:ez2fc8onyb:iwr wo charges?

  Electric field lines near psitive pbc9rl.xtwr;mzw v/(4oint charges

  The electric field s uozevud6wa s/ ::2xfz*z9fs3hown

  Can electric field lines intersect in free spqufgn/1yc : z;ace?

  A solid block of metal in electrostatic equilibrium is placedu8: 2c4ed 6k ogxjdd 7mcnz*z1 in a uniform electric field. Give a statement concerning the electric field in the block's intemd78oxnu2gd4de :6* ckjzcz 1 rior.

  If a solid metal sphere and a hollow metal sphere of equal ditd+d aw0ut,* rg h+ly2ameters are each given the same charge, the electric field (E) mid wlt h,ta0*+2 dguyr+dway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region wherd(gm) g7qn;q0bo,p e je a uniform electric field is directed straight upward. What can be saidmn0qbqdp oj(eg,g 7;) concerning the charge on the block's top surface?

  If a conductor is in electrosts:,x 03dz h)y l6g:jwgyfls8 natic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that is groy0 qzo/8f eyvsr;xa85viw22p unded. As compared to the case without the hollow sphere, the electric field at ayov /e 5w28qz0p;vyrxis8f 2 a point directly above the hollow sphere has

State three properties of nyb;(k z9ry x+conductors in static equilibrium.

State Gauss's law.

  The charge carried by jgc.:ya 58*an xigmsb9 sqm39one 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 nfl-n5 )/r.sy2srvj cvet charge of +2.00 mC. How many more protons than electrorsj.v52 c/y f-rnlv s)ns does this piece of plastic have?

  What is the charge o 3gnk2e+ra 1 luqs*vx8n 1 kg of protons?

  An atomic nucleus has a charge of,6ktj ;x ywn xkyq.y-j:p4 7icyqgp+8 $+40e$. 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 valumeu lj78f2l1+u qfp+x,-e apges of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force between them2lp uepaguqj+f f,+e- 17lx8m?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1.0 N(n/x2f,wygt zh4(s.s2 ;qqppt nk 4up. / ttkq.4ypxnswz4g , (hspuf;(q 2pn2What is the magnitude of the second charge?

  Two 1.0-C charges have a force between thefwf1mhv2,m 5f7 ll,4mmoehqk 2jo4t /m of 1.0 N. How far apart are they?

  The force between a 9/hgv 5i rwl5 ukzcg69$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initialnv5k 4 bmgx1v)ly 2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 mnk gv4xb15) vcm, what is the electric force between them?

  Three identical point charges of 2.0 mC are pla om l6h;,u-dykced 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 charge at thm y;u6d-lo ,khe origin?

  Three point charges are placed on the x-axisimydl oa,g 5(qjw-.x,. 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 faxq-, jdg o,i(wly .5morce which acts on the charge at the origin?

  Three point charges are loct+kiee91):psx z d,tfated at 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 ofkzdx+ 1eift9 p:,e t)s the force on the 3.00-mC charge?

  A point charge of +Q is placed at the centk7 4 wp9bayz32 pkwo0u+lcxo*er of a square, and a second point charge of -Q is placed at the upper-left corner. Itxk7by0o l*p349kp+cw z wa2ou 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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 u9pw-gky z2p ar2*0 wt2-mcho= 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charge2- 2war0-p2cwz oky9ght*pmu?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at d-ru. fpef,v 3k .t:ws(0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force: k 3f,pw.s-rvf du.te on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilatewsbonnf.1yx6f:jp :( ral triang(f.nfbj1w pxn:o y:s6le 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, which are separated by 3.0 m. At w9pps;39 wq6 :mvrbjy)v* j a roecqz.:hat 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 zjo :j wqpmec:zqa*v. r9yp6;v93)br sero?

  A +3.0-C charge is at the origi) -m xvwpf:- vagc;tr4n and a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the n gx;-t w)pv 4m:-cfravet force on it is zero?

  Charge +2q is placed at the om3g0;5qmbb z wrigin and charge -q is placed at x = 2a. Where can a third positive charge +q be placez5m3gb mw;bq0 d so that the force on it is zero?

  A copper penny has a mass of 3.0 g. xh7wj+sv.0vf6nxw s)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 attralq zf9d, b1sfu/ 3m25f mevm;tction of a fixed proton some distance above it. How far above the electron is theu ,bslfz mv5efm/t ;2m1dfq 93 proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting threag+jw mye2ywes 7tkx .+b1 pe659xk tp3ds which are 30 cm long. Both are given identical charges, and the electrostatic r7b. ye5p6s1kw +2xw9gt kpye +3mjtxeepulsion 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 tc.c+m(cy5npm k j. a(the electric field at a d( ajn+ykc(m .ccpm5.tistance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance o7d2; e-*9dyr sdrthhd f 1.50 m from a 50.0-nh s de *rd;2rdyh-7dt9C charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnhfn.. +4jjkf nr,v -gditude of the electrifn k-rdhn4. ,gf.v+jj c field at the location of the test charge?

  A 5.0-C charge is 10 m from a smallu:ocsy gw i,*:i0(ihs test charge. What is the direction of the electru(scii:*i wh:y ,sg0oic field?

  A 5.0-C charge is 10 m from a sma jn9z43lsic2 all test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the locj3z2l csa 94ination of the test charge?

  Two point charges each have a value of 3.0dhqxa/k3 p 1dxlvkigiz:na-v+) 0;i; C and are separated by a distance of 4.0i/pvi) ;dkhdl-i 0gxq +ax: 3v 1k;nza m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at tu8).bimbr (zy he 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is .8br ibyu()m zthe 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 mC chsna*nr .zr*wdk;r+mn.z* ; +4vruzcw arge is placed at the 50 cm mark. At what point on a line joining the two charges is the ;;n w+.** c+zkrrv r4 *azwzns. nurdmelectric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = eukr/ (a5v2n 4myng8cix-qp )0 and x = 0.20 m. What is the magnitude of the electric field at the point midwev 2ir-ynacpxg k(/ )48n5umq ay between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. The9b jkkzo 2v-(y last corner is occupied by a -3.0 mC chav2 bj(9ozk y-krge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the codk o.-9l i)nta4dc7 2xqbw+p rrners 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 field at 4+oiq2n -pdx.rlbta wd 9)7kcthe square's center?

  A force of 10 N acts ou43yq0.x e5k y axth6gn a charge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude y. g5a e3uyk064qxxthof this electric field?

  A particle with a charge of (v 4bn4owpx m-y 12mo58e kszz4.0 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 r-yivr.d9xn )v(9t cgan electric field of 6000 N/C pointing downward. Whatrdynr( v9.)vt 9-cigx charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.01shrx 4k9+far0 nC. The ball is placed insra+ r9 xh1kfs4ide a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm en;44zqc0d afo/5ga7f : z1i-bs wgv ycarries a charge of +2.0 mC. What is the magnitude of fnd0vaq;ae4iy gg zbw-s5ofzc4 71/: the electric field 5.0 cm from the sphere's surface?

  A metal sphere of rad2 6-efzjhavjno1 6 1o6oxr gj1ius 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the6zo1hv6a2 n6jgxr o-ejj1 o1f center of the sphere?