State the law of conservation of electric char5gv; 7,n( y2hzdgaxcwg ; nx/sge.

  Is it possible for two negative charges to attract each other? ;8vjov:k4tgi

  Is it possible for a positive and rs*uf3fs .7yl a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the procpcy-qo6wgyq b 5t; ht)yx/k,m.xl6s5ess the glass rod acquires a positive charge at. qcqt;ywk5yy oxs,/pl6 xh m)65g-bnd the silk

  A proton carries a

  The model of the atom sho)sj9+m pvdw ;2ofi: xsws a

  A neutral atom alwayskxfkl5h 1;b8 d has

  An atom has more electrons than protons. m2;te 7oo18cc9 cyuub l6gb; 0tm ngm7 The atom is

  Materials in which the electrons are bound very tightly tobt5 fcham2si0s oi 1 s2.d*7hh the nuclei are referredstd.h72 10si h2f 5*ombhicsa to as

  Materials in which the electrons are bound very loosely to t :b8, 3zpkfzxihe nuclei and can move about freely within the material ar38z :p,fxzi bke referred to as

  A negatively charged r bgns + j 6qr g;)plczb+1w5d4qh1y2ijod is brought near one end of an uncharged metal bar. The end of the metal bar farthest from the c4j;1b b2gp)r+ lcjd w5hy61zn+siq gqharged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neuh3lyq xzfq32us 0: lw8tral. They are placed near each other on an l 3yf3sz0:2qlxuqhw8insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope posit7k;1 zuxzr r dzu6d+:ww h 3s/jhydz77ively?

  An originally neutral electroscope is briefly touched with a -seijt 9 *zok9positively charged glass rod. iz* 9 ets9ok-jThe electroscope

  An originally neutral electroscope is grounded briefly w daaf3l9 ra6a.hile a positively charged glass rod is held near it. After the glass rod is removedr aa.l93 6dafa, the electroscope

  A positive object touches c iw8ztw9rp74.ayd1a a neutral electroscope, and the leaves separate. Then a nega rp7tw wy1z9c4d8.i aative object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulat8j+lkc j+bnk /ed 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 8cbkjn+/+kj l 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 codgjfab+)+ e s7nstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charge is larger kn5dverr,n vjgvz s8;yyc(,4 i ((jc/in maevry;njjy,((ir/c(vc45 d s, gv knz8gnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral 30e+kq(ltjk.l4vwo 1) v4dwum je4nn . They are placed near each other on an insulated table. Which statement be om3w)(. k14uvnl4vdj 4 jkel+0q entwst describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. 7ew 5kodr0r5 gez; u:b8jdi;.nwlsd+ If the charges on both objects are doubled with n r 0;lsgd.owkidwb55u;rjz n:78ed e+ o change in separation, the force between them

  Two charges are separated/aycxut(--tcg ufz f *b-s(b: by a distance d and exert mutual attractive forces of F on each other. If t/: b*cu(fg-ftx(ca-uy s -zbthe charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each w /,eu* vt3vzaother 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 theit uwea3/v*,vzr centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton ar kdx,qm7 .0:tmqvme9y*h*ff t01gwz:jks+u ke separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is place0jkqdfy u91 7fk ,*:k+t .qg:0mtsmezxw*vmhd next to the first electron?

  An electron and a proton are separardtf7p u+ 25xited by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next to the protu+rp ifdx 72t5on?

  An electron and a proton are separated by a distance o 2eg e fm5t8vnln/6v4if 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.v65 2 /nne4fg8eilm vt50 m closer to the proton?

  A point charge of +Q is placed at the centl 6ida 96ua0x kz2c:prer of a square. When a second point charge of -Q is plk:pz62c i6a 9xarlu0 daced 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 positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilatedvsi5v+ ij6, srm1/caral 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 one of the other +6 v/a,1cvji ri5sdm svertices?

  Which of the following is not a vector+:.-*rqyjy+f1 ak2bcbv xqpq?

  At twice the distance from a m61cf;ujr;x hgc(jk:6:f ir h qj))pq point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a ne dnoa m84w;0 -o.tjzaegative and positive charge along the line joining the two cha.amezj0 ;a4otw -on8drges?

  Is it possible to have a zero ele6- /o,trq rxzoctric field value between two positive charges along the line rz o6r x/q-to,joining the two charges?

  Electric field lines near psitive poi7ks)9-euxmov 2r*goy nt charges

  The electric field s,ckc4h n(v rz 2m.g3tbhown

  Can electric field lines *mzk/fhoq, /iintersect in free space?

  A solid block of metal in electro5kc ds0p 60vdhstatic equilibrium is placed in a uniform electric field. Give a sd cd0 5hv06skptatement concerning the electric field in the block's interior.

  If a solid metal sphere and a )yy :cfpqx7c/hollow metal sphere of equal diameters are each given the fx/:yp c 7)cqysame charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a anp:,ckwjp8.r :a h4ux* -eao uniform electric field is directed straight upwardj upoh:,- ewrapxck8 :a 4.an*. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an *h/9 xlal24 nrs)m wvrp(v7khelectric charge

  A positive point charge is66y pb/gb ,r6- pt+dhqczn 8by enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above tn66pqbr bh/+bc, - zpyydg68the hollow sphere has

State three properties of conductors i5 f5lfqnzw,y4 p3 c saud5cm6 e1u;o7pn static equilibrium.

State Gauss's law.

  The charge carried bt *ahp ;kgee-g+n7uycw+ah*3 (v(dfx y one 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 z) m v6w-bnuyn1 o+x/bi/8ly9 jj+ljw more protons than electrons does this pie b y xjil9n-yzjmloj+vb+6/un8)w/w1ce of plastic have?

  What is the charge onl as1a7rp/ wx- 1 kg of protons?

  An atomic nucleus has a chadbld6kc14q6ndgd-1,; a sxjy/ egpt6rge 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 cm, have charge values of 2.0 and -6kkl (.bk)wj hye.7inz rw37 i4.0 mC, respectively. What is the magnitude of t7w 7kk.b hjkn(iyi)3elw 6zr.he electric force between them?

  A 1.0-C charge is 15 m from auy 5-)x-9h h mz.ppg4x,vvnbro+lov) second charge, and the force between them is 1.0 N. What is the magnitude of the second cn ,v.-xr)vy-x5m zv) og+4 h huppbo9lharge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are thvks e4 p3:zo a-,rhbl)ey?

  The force between a 8 cq u.s8-ji 2eubt)bq$30 \; mC$ 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 ixgg)*m8xkejom c5 q:o)fo/0-N force. If they are0gomo q*o f )e:x8k)i/g5mxj c moved to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point ch5ri g6 wfp0l/larges of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second to the right ai06fl/wg5 rlpt 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 the origin?

  Three point charges are placed on the x-axis. A c wxp073cqz4u 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 mzc p04uwcq 3x7agnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC at x h; (5kaz q kb6/ivf8bq= 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 the 3.00-mC chaq6b5kv 8fbziq h;/ (karge?

  A point charge of +Q is placed at the center of a square, and a secsiet:f j,s3pfcye0 6l-b v/3sond point charge of -Q is placed at the up0 tcfjf/v3slepi:y,s3 es b-6 per-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 corner?

  Q1 = 6.0 nC is at (0.so.qkx38m6 x p30 m, 0); 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 nC pqxk m.x6s8o 3charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m) 9w lnl5fliq)qw0s8;j3 d ibm6; Q3 = 5.0 nC is at (0, 0). What is thenqiw ilj5w 9l6;0)8m bslqd3f direction of the net force on the 5.0 nC charge?

  Three identical charg zv* hzb n;ex.vhzgxgjjd- qm0m*k3.5 0f 42hres of 3.0 mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force mzd e fjh 0g5mjq.zb vgk* ;xh4n.z*2v-0hx3rwhich acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.e)fysbx-w,c/r7 m9h d0 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 aewxr-)h/db7 myc f 9,scting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is abrb83gr ( f5qkt x = 4.0 m. Where on the x(q3 5rfrbg8bk-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q iw;atn4t/ a pwxrk*w.9tag/(x j:pv k3s placed at x = 2a. Where can a third positive charge +q be placed so that the force on iw4 twp .at/ p/9rk k;a(waxvn:3*xtjgt is zero?

  A copper penny has a mass of 3.0 g. A totqoix 4hor49 :j1 k-k+ i*j.w9wxjvlan al 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 attraction3 f-t u)tz0r q5.v8c-o,g cea vawoj:z of a fixed proton some distance above it. How farr8vcu0 w tofte)-. jg:-o5z,cvq3 aaz above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common poitq1 z1msme8b2gdma( x4x;kq8eiq*9gi x:s4 lnt by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle betwe42gq:sqibk8l8g;ei 1qszmm (x *41d9texxam en the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has -l3n ubup*ikbvg.:ppfgx6 2 .a charge of +40e. What is the magnitude of the electric field at a distance of 1.0 m froubk6vgpiu. f2* -:n.ppxgb3l m the nucleus?

  What are the magnitude and 1l-. / ucnjypudirection of the electric field at a distance of 1.50 m from a 50.0-nC-1.y /pncluju charge?

  A 5.0-C charge is 10 m from a small test charge. What +fxqgkve4y,) is the magnitude of the eqeg4 yv)+xk,flectric field at the location of the test charge?

  A 5.0-C charge is 10 m fdvgke o2k;5 bt w76vst i(s1w+rom a small test charge. What is the direction of the electric field1 ew5 s+d7;bwi(k tvvsogk26t?

  A 5.0-C charge is 10 m from als orug -;3 ujzf2hiim71)7dq small test charge. What is the magnitude of the force experienced by a 1.0 nC 17ogfjhq;mz-u)ur i2id 3s7 lcharge placed at the location of the test charge?

  Two point charges each have a value of 3 qujl3l0p.lht6 s,-in.0 C and are separated by a distance of 4lp,-j63i.lu tn0h slq.0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is plo3c qh0kw63ps dr qi81aced at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm 0 r8kiw3o6 qpd q31schmark. 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 y ovdfa+)33olstick and a -4.0 mC charge is placed at the 50 cm mark. Atofyad3 vlo3+) what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 nc61po/6urrj4jw3d2xh nbq, mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway jrw26d,cbxn1p r/ uhn6oj 34qbetween them?

  Three 3.0 mC charges are at the three corners of a square ofld yogm 53 -vz8d-5nvr side 0.50 m. The last corner is occupied by a -3.0 mCgv - dv85-mdn3 yol5rz charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m o wn0,1pn ;vg1yr x/ps1zwg(pzn a side. Charges are placed at the corners of the squarpg0wx( 11z ,r;sg wnyz1v/ppne 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 uniform e5o )gck da-exp)udo+*wv vb*-lectric field. What is the vvcx)5o) w-u bo*-dk ea*p+dgmagnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass skgcims ;8p6: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/y-uq0ikzy w/ g0t hxuxc 136k4C pointing downward. What charge must be placed on the ball for it to be suspwzh4 1/6u-3k0tyxyk0cxq u giended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placed incjec+/.g; w r) ev ;ig6 tc8maqxkz7a8side a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of.q e8cekz w6 ra;j)+ 8xvcmgagc7/i; t the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 zjcx.jh d k;5f.m0l4smC. What is the magnitude of .z0f4.s h;5dkmjxcl j 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 elguj;l 7ntq7q /6c(latectric field 6.0 cm from the center of the sp (t6qt n7ll u/7jqa;gchere?