State the law of conservation of electric cb*vs -zch+ l)fharge.

  Is it possible for two negative charij9nta1 zse1 t3p/ uuy l8i78yges to attract each other?

  Is it possible for a positive and a negative ca;5i rfv)7)i jvz:mluharge to attract each other?

  A glass rod is rubbed with a piece of siz lpa mmk/zg.x3-8e( +z u1smalk. During the process the glass rod acquires a positive charge and th( gza3+pzl z8/s-m k.mxa1meu e silk

  A proton carries a

  The model of the atom shows c w/y27y,abh qa

  A neutral atom alwaya vf,ly 7mtp62s has

  An atom has more electrons than protons. The*r(c0 hucmavi m.-tb 78x i7ly atom is

  Materials in which the electrons are bound very tightly to tob xq w)iess 9;1p9x1xhe nuclei are referredbw oi19 x e1xqx9s)s;p to as

  Materials in which the electrons a(3nw mr xdpn75re bound very loosely to the nuclei and can move about freely within the matewnmx7 pdr35n (rial are referred to as

  A negatively charged rod is brought neav2fj 9psz*j w;r one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will bep;w s*9zf jjv2 charged

  Sphere A carries a net positive charge, anveqzzi-4kvl ws/ *86w d sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched withve ksz8izwwq-/*4l v6 a wire that is grounded. Which statement is correct?

  How can a negatively ch hso0mr*t fr2 8(cvh dp0q4d8barged rod charge an electroscope positively?

  An originally neutral elevop6;0pr tt z,ctroscope is briefly touched with a positively charged glass rod.or t0tzp;, 6vp The electroscope

  An originally neutral electroscope is grounded briefly while a positively co opz7 2y *9j*3hnypedharged glass rod is held near it. After the glass rod is removed, the97hdnzpjy2*3 oo*py e electroscope

  A positive object tou -an kd;6l(ijyfw,s6tches a neutral electroscope, and the leaves separate. Then a negative object is brought near the ewsk(f6,d-;t j ian y6llectroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object i;jd08:l2fvt,zj unn t s placed on an insulated 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 followe2;d,n0 z8fujtj nlv :td 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 kl-sak3 ysjy*(4dv) kw8g,ibthe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first)5qf gys9xy);f t pny1 charge is larger in magnitude t x)915ff );qspygynythan the second charge.

  Sphere A carries a net chargdv,- g,f8h 6qrvit0v le and sphere B is neutral. They are placed near each other on an insulated table. Whicrtvg,vd0- ,vhl86qf ih statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If1b pcmh,;qy+xz,kfu 9tz 0f u8 the charges on both objects are doubled withzmk,cb 018 uxf9u+hzt;p, yqf no change in separation, the force between them

  Two charges are separated by a dis pkjb/ .hl+7og 5*pwqp a9766yqgr usqtance d and exert mutual attractive forces of F on each other. If the charges are separated by a dr6 .* bg+pasuh/ 5l7qko6j g y7wq9pqpistance of d/3, what are the new mutual forces?

  Two charged objects attract each other m f+*g(o9zh rvwith 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 c+h fvzmrg9o (*enters is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton q0c7rqu7wp cr 2ak 3zm;y.c;nare separated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron 0nccqp;zka7ur2q my; c3 wr 7.is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens to yy/h-8bq 5h yzf7rry9the magnitude of the force on the first electron if a second electron is placed next f/7q hyy8hrbyz5 -r9yto the proton?

  An electron and a proton are separated by aj,ev:0qz t ji7uac h(1ik:f,c distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 :c :a,hci 1t jv(qe0juz7,ikfm closer to the proton?

  A point charge of +Q is placed at t;:b e9k wuf7rhwk+ vo:he 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 the square's center. Now, iu9fkwb7k vho +wr:e; :dentical 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 equilateral triangle. Whd /hlfyb (.,eo3syfglf1dq(t 2gh -a8en a second charge of +Q is placed at one of the triangle's vertices, an electrostatic force of 4hy(lestf.y/(1db2 ,3f-of 8hqgdalg.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 6yoam 2grthh5kh,hy;a2*f c: not a vector?

  At twice the distance from a point charge, the strength of the electric fk gq;tofaw06/e8to6 vield

  Is it possible to have a zero electric field value bet braiv4:n e.-gptb+uhp qy+22ween a negative and positive charge along the line joining the two chargq-au pt+2y4erh:gp+ .nb 2ivbes?

  Is it possible to ha f1+mucs9;e vwpz(mswt f;;- bve a zero electric field value between two positive charges along the line joining the two chargest+ump cw(b zsf; vw9;;f1-esm?

  Electric field lines near psitive poi 9y4p6txl /d5jdjdyu/nt charges

  The electric field showm8+g5c1vbz pooac9(e n

  Can electric field lines intersect in free sp-8p;m:s avy1ok j dh4lace?

  A solid block of metal in electrostatic equilibrium is plac,l/tv66wp pcg ed in a uniform electric field. Give a statement concerning the electric field inl w/6tppgvc, 6 the block's interior.

  If a solid metal sphere and a hollow metal sphv- 7ds w8sw87svff*cqere of equal diameters are each given the same charge, the electric f8 svf7v 8 wqdss7wf*c-ield (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a re6)bw.f,swtz+r; tv.h2 wnfegr 6u;a ogion where a uniform electric field is directed straight upward. What can be said concerning the charge on the blocr; r b gh.fvatwztonf,w)6 2+;we6. usk's top surface?

  If a conductor is in electrostatic equilibrium near an electric ch ,q5:kwlp,gesa q-sqh (x372m- y-wm 5 rkanxzarge

  A positive point charge is enc/:hw uym7gea 7ggt4 .dny5v )elosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the 5m g:747gg)tneuwe/vy ayd h.electric field at a point directly above the hollow sphere has

State three properties of conductorv ih8dgz.41th s in static equilibrium.

State Gauss's law.

  The charge carried by4p1krw(8 ulqin8 i0f go+ k,pb 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. fudp;1h s 0wz qg2swxj+ ,u6;l How many more protons than electrons does this pie 0;zu6xl,dww2jgf+;hs u s1pq ce of plastic have?

  What is the charge on 1 kg of protonswgz*)( dr a7(/6s jfkod6vh zq?

  An atomic nucleus has a charge ec 6 ( gppp,e5q ;)9u7zly,wmu)eiydx of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separapt)n 93p*ufuwted by 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is t*)t93n fuu wpphe magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1)vqsok,:x 1 )y x3 imiiakn/h;.0 N. What is the magnitude of the second chark,i xoh )1 ixv/3qy;ni)s:mk age?

  Two 1.0-C charges have a force between them of 1.0 N. o8*/mu(rgd j yrwnes*a2j(. e How far apart are they?

  The force between a k1 dbk;5p2dzw$30 \; mC$ 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 16q/rc: m7wzgsn 4g ak1.0-N force. If they are moved to a new separation of 8 m gqn64ackz71r /gsw:.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 q3 mk:jufasg7a: +sr-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 direcuakrfj-a+s7 s:q m3g: tion 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 mtlpfs-/he k/ 3C is placed at the origin, elt pf-/ s3/hk-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 follnv 2+ z.kg qbvcu:i),gowing 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 gk)vb qgvun: .zc2+ i,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 square, and a second point chjf r15f c3yrx9z 3 pox.p1-zhgarge 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 fx rpp-g 313rf zxo519.z yhjcof 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); k7) m,xw :f okl+er5i,hh:1c z(bdxc pQ2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net f+x, ile)h:x chp7wb1fo kr(k5m: , cdzorce on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3kg1f ucms 1:1s ua.4b lg:gno1 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC umb 4as::1 1s lcu1ggkn1.gof charge?

  Three identical charges of 3.0 mC are placed at 0w siud6nx8 m+57s+0gzkbzku the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic for05u+ 7wzkn+8bsu gxikzs 6m d0ce which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separateda+ojme x+wu-yoq .1d(s35m y d by 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -w1jxosd53yu m mq+ y+-ae od(.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 aphd2he8h+e 4y t x = 4.0 m. Where on the x-axis can a third charge be placed so h8+4dypeh2h e the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x d2cu jk.h+anfrw5 b1:= 2a. Where can a third pc :12ur wf dn+jab.k5hositive charge +q be placed so that the force on it is zero?

  A copper penny has a mass o- o03 ml3-r )mfn,(kdglizlzlf 3.0 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 agar xaus +g.2c0iinst the force of gravity by the attraction of a fixed prori0x .ac2s +ugton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal sphe x,p3- d*gryzxres are hung from a common point by nonconducting threads which are 30 cm long. Both are given idend zyxr-3gpx*,tical 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 ha zs8ctb3 sqqoqi9714 is a charge of +40e. What is the magnitude of the electric field at a distance of 1.0 iqcsq q4tz397i s o81bm from the nucleus?

  What are the magnitude and directibj7 sjj2ycmcps ;,s;1on of the electric field at a distance of 1.50 m from a 5012sjmyp j c;c j7,ss;b.0-nC charge?

  A 5.0-C charge is 10 m from a small testca9r9t48 n b(yxy ch+c charge. What is the magnitude of the el9a 8nc+ rhtby49(cycxectric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Whr;to,y*;gu ad 7 0 -bawysk7obat is the direction of the electri*o7 dtg- ra s y;u7ya,b;0wbokc field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of 6+ nz vn;-ad zxy1xo:athe force experienced by a 1.0 nC charge placed at the location of the testd a+61x-:xnn ;yozv za charge?

  Two point charges each have a value oc ;es,9ll;xecf 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a;cel cx;, se9l point midway 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 chakm2tq1ydu18 *t h i/jnrge is placed at the 50 cm m/ tq yjmn1ti hd2k*18uark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the fbov++xf c(ce/1 4ibc0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is th+bccxe+ 4(1cofv/bi f e electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and+ i1r2.vls njb x = 0.20 m. What is the magnitude of the elecvj2s1 l.i r+bntric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sid xv6sm8e3kdy61u(uzl e 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the8m1k zsv36(e6ulxuyd square.

  Consider a square which is 1.0 m on a side. Charges are placed at the cokx wyx, b4hg0u3ly9u (rners 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 the square's cen30u ,ylxh49kuxg(ybw ter?

  A force of 10 N acts on a charge of 5.0 mC when it is pl2ffq l2di pg5:aced in a uniform electric field. What is th:q 2gpff 2d5lie magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass rt 37 rbm 3vjcsyn-7r(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 isbea.ui,f yu:n,--l ck placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball foy-i :,-c,k.nbu ul faer it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is place7ne 0lk: ig(g -aswt/ xm5oo9loao/:wt z4ac /d inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electri c-4 0/m:w/axa9on ole kt:ogg/(lit5wazs 7oc field?

  A metal sphere of radius 10 cm qx dbvoc3f ccdl+d9 ,,w;r 7/ecarries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's d,l d3 owv+7crcef d,9;/qcb xsurface?

  A metal sphere of radius 2.0 cm carries a charge of 3*0n7oeocb0ns- rrrzdx /61u t .0 mC. What is the electric field 6.0 cm from the rt6x u7dsercn -o0on/b *1z0 rcenter of the sphere?