State the law of conservatio qc.x )/5*eb/adzzrjm7;p ris n of electric charge.

  Is it possible for two negative chargfp;w:x3t o+qk es to attract each other?

  Is it possible for a positive and a neg4ck.e4d v)on*vwwvd( 3cv pj / ;smjka/u2p8gative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During theu:eaiy mib/zd 43q7q:7sj /vu process the glass rod acquires a posi4qb3/d v/jeqmii 7:u uaszy7:tive charge and the silk

  A proton carries a

  The model of the atom shows 9e:gwk*br)2r.7 b z.gc ffrkj a

  A neutral atom alwayvf+zouw+gv;/si )3ae1kf4c- .dm p rns has

  An atom has more electrons than3*8 +lek wf2w7qk l5car:uozfh9)jip protons. The atom is

  Materials in which the e.9lzs 7z)xibk lectrons are bound very tightly to the nuclei are referred tk 7)sb zz9x.ilo as

  Materials in which ti8 q/gn)x+quh he electrons are bound very loosely to the nuclei and can move about freely within the material are refeq xi)/nq8u hg+rred to as

  A negatively charged rod is broughmk0*xmpbsj c kk69 5,h3izz/ at near one end of an uncharged metal bar. The endk0h3pa59b */mx is,z mcz6kkj of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive chargek iubm :aj9d:c0syekt. s g430, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly toui0 4.ycgjau: 0e bs:k9k stdm3ched with a wire that is grounded. Which statement is correct?

  How can a negatively chargeddsml7* x8kexp)/*u bs rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a t2: oi .5it-ui5opz0 vm,jyczpositively charged glass rod. Thi5tct0vu j y2iip.,oo: z zm5-e electroscope

  An originally neutral electroscope is grounded briefly while a y*kqdy+ t.co,b/fz o 0positively charged glay .cof0qoz,dtk y*b+ /ss rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separ a+d+epde3pl(ate. Then a negative object is brought near the electroscope, but does not touch it. Whadp d+eea(3lp+ t happens to the leaves?

  A large negatively charged object is plab d5-) ng sdty84ei,cmced 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 followed by the first ball, strikes the first ball, and stops. The first ball rolls forward, but does not touch s)idy4ntdg5 ,cb 8-me 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 tq8wz ab/ 9-xhthe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first cwo a/kq -0ay noswf.(+harge is larger in magnituy+/as n (ww. -okaq0fode than the second charge.

  Sphere A carries a net :lw+e)s:l; 2qylcxvd+zk i9qs 2h (5)umv t pocharge and sphere B is neutral. They are placed near each other on an insulated table. Which statement best d: k(vqtdxqo5ssly+ 2 c;lu)l)e:zvip+2w mh9 escribes the electrostatic force between them?

  Two charged objects attract each other with a 4*6k ysaxx9uiy 6t7gucertain force. If the charges on both objects are doubled with no gak7y6i9 *x6u 4xut yschange in separation, the force between them

  Two charges are separated l7h8;5s,wsjd , dsh dbby a distance d and exert mutual attractive forces of F on each other. If the charges are separated by a distance of d/3, what are ,d;,5w7dhsh8s bsldj the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the forc6wa0txak)(gfxclo/z nr 9l,; qhy3q5e 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 forcen6lt/woxa x5rq) ;lcag3yk,(q 9z f0h is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What hanv- 4 z8wllo.pppens to theolz v.n-lw 8p4 magnitude of 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 happen5 ndyv1d98oda+in 7k 7vbgz3fgx8k4ns to the magnitude of the force on the first electron if a seng3avbk7gid7x 8 v9 d8z 1ynd+45okf ncond electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happ ak .kna9ulb::wi;z. pens to tal:piwu 9bkz; .k:an .he size of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is pla cjl0,n1o(zi*i;* ffr1,nvss )qszil z4. aww ced 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 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 els,lnqli40.s ) z(voa* rcwz iwjnz f;1s,f*i1ectrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an eb :/xej43j)bhg 2hmzj quilateral triangle. When a second charge of +Q is placed at oh /2jz)he :4bmj3g xbjne 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 vertices?

  Which of the following is nh 2j7cdd*)fgu(d+k ke ot a vector?

  At twice the distance from a point charge, the strength of the electrictsp+:i(xb(w uzm k0tsqs4 )+b field

  Is it possible to have a zero electric field value between a negat jpl)+,uz r8w4qvi- tfive and positive j+wt8uvq z,4rfl-i p)charge along the line joining the two charges?

  Is it possible to have a zeu7ewk0/ rjt*i ro electric field value between two positive charges along the liner7e 0witk* u/j joining the two charges?

  Electric field lines near ps/t. ple9,rka at1(7ec u6yxoaitive point charges

  The electric field shog1/gaj dtgz/2e b au c88pd(7ewn

  Can electric field lines intersect in free spacplddm 0 g3a8a+e?

  A solid block of metal ig mmbcm) ) a 582)bzfln2xg4lvkv.(ch9mh t2 ln electrostatic equilibrium is placed in a uniform electric field. Give a statement concernilm.cht25mal82 (gvbfc )2xv )l hk)zmm 4b9gn ng the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphek is2n7z/:if 2bqi(n p6n*l evre of equal diameters are each given the same charge, the electric fs:i n/filp2v b(qi*n26n ekz7ield (E) midway between the center and the surface is

  A cubic block of aluminum rests o/v dgo sc92*cgn a wooden table in a region where a uniform electric fsgco9g2cv */d ield is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium,o zznc f-+gjho) 7dlyw.brs22oi9:q near an electric charge

  A positive point charge is enclosed in a hollow metallicwfui (j9x8x hjn(t16n sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollo w(f 81xhjt(96nuinjxw sphere has

State three properties of conductors in static equilibgq t:.ju kxl,zx9q ;9srkn2 y1rium.

State Gauss's law.

  The charge carried b5(/sl +5jl l kegwuoxvjy3-.py 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 more protons tha6 cpg3r x 46j5r.6di 0epbijwfn electrons does thise6x5d3jpiiwjr60 . 4c pfbg r6 piece of plastic have?

  What is the charge on 5l)wfbx8ca kz h+ar k;s0sl271 kg of protons?

  An atomic nucleus has a chak5lbsi h(v ,w(h/ux*j rge of $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separadlcq xt9y j9* /1eg(gzted by 1.5 cm, have charge values of 2.0 and -4.0 mC, respect (tqyxglz ej/d 9*c9g1ively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, andzq)l l*-u-j yk the force between them is 1.0 N. What is the ma-l)yujlz kq-*gnitude of the second charge?

  Two 1.0-C charges have a forcami rk mw0/ rtx6-b)n5e between them of 1.0 N. How far apart are they?

  The force between a unal///abe:x g p7p6l$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experihuj*ettr n. )/ 6pfh5fence a 1.0-N force. If they are moved t e *5.ftfh )jhr/6pnuto a new separation of 8.0 cm, what is the electric force between them?

  Three identical point chargesls1z( ss:;7ccwkl 2 k,vhnac4 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 isna(,4c1l zwklkhvs2:c cs; 7s 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 9h73zhw u*t0 b8 yszgqx-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 cm7h0yq9 uh3wszbzt 8g* mark. What are the magnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are locwux)ev. - pe5qated 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. epx5u-e)w .vq What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at 5d plho7w (j8tthe center 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 cent pj(5tw7 h8loder charge if a third charge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0*z/ i;(mx3 lykjl(x vd); 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 thevxml*3i(d;/xk(y jlz 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC 6 oqn p8; lv4nhpb9o3mis at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the dire nlh; 6o8qpbnp 49ovm3ction of the net force on the 5.0 nC charge?

  Three identical charges :4jfw la zs58pof 3.0 mC are placed at the vertices of an equilateral triza48 :lp5wjs fangle 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 2 l*3pa jf8amcand +4Q, which 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 taflmc*p382 a jhat 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. Wg (i7ozidyja-+ff6 xw tn45h(here on tht7jy(f w+x6i4ado5f(- nz ihge x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at t ,ls:2eh0pwkk booh,)he origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is zero0:sloph 2hke ok,,w )b?

  A copper penny has a mass of 3.0 g. kcx62t 5/ vbae 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 attraction 8i p8dh a*csa5of a fixed proton some distance above it. How far above the electron is the proton?8p5dash* ai c8

  Two 0.20-g metal spheres are hung from p4) ega1n/nhya common point by nonconducting threads which are 30 cm long. Both are given identicale1an/ 4gy)nh p 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 +40e. What is the magnitude of the electtll3hk3 po s9i0:q ok3ric field at 3okt:k0pqs 3h3o i ll9a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field i9o mz zsi:wk,zq3:kxg7 g b6jr9d l/1at a distance of 1.50 m from a 50. qgrz/jzdm99k3blgkxoi17 i:w,6z:s0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the mard/bu.(;a1 myt3xih ignitude of the eleca;/x i1ibtm .hry u3d(tric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small testna-pryzi80siqc+ )r1o-yt 9x charge. What is the direction of the electric n8ri-p)q x-a 0yy i9c 1tsro+zfield?

  A 5.0-C charge is 10 m from a small tr. tn9+ li+lk 6ylj q7zj2c9lgest charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at tz92 cj l i+.+96jy7rlqglkl tnhe location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distancuehjk2mr* ,, ze of 4.0 m. What is the electric field at a point mhrk, e*juz,2midway between the two charges?

  A 5.0-mC charge is placed at t w)ih0fo.tz9;5 bsypehe 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What izfp0eyt 5;b9 iohs w).s the 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 e-re 1t:-m9d jt49zos/bzbc p mC charge is placed at the 50 cm mark. At what point on a9bbme jzrz-p1 ct9/:d et4-so line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are pkq;gwih2f 8yn k4*q)j laced at x = 0 and x = 0.20 m. What is the magnitude of the electric fh ;*q) 4qkjg ni8yk2wfield at the point midway between them?

  Three 3.0 mC charges are at t k9fwttb :gig 0lrt2+1he three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Fin tw1+fi0b :tgrtg9 kl2d the electric field at the center of the square.

  Consider a square which is 1.7 ik th(0hepf20 m on a side. Charges are placed at the corners of the square as follows: +4.0 mC at (0, 0); +4.0 mC at (1h pi(kfeh70 t2, 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 oh p,:4qpch jgtxj2v2 xk-d-sb)ga j2b9b6t3e f 5.0 mC when it is placed in a uniform electric field. What is the magnit, 364bgt9heajpxjjh2b 2pq)db v- g -kx c2s:tude of this electric field?

  A particle with a charge of 4.0 s-vz5(cwy17 mst3ittxx* k 2n 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 kzf(f)q4o j i86gx r0lg is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to be suspeo0 qx6lg(z)k84fr fjinded?

  A foam ball of mass 0:u b7eulzu;3 f.150 g carries a charge of -2.00 nC. The ball is placed inside a uniform elezfe3u7 bu;u:lctric 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 carries a charge of +2.0 mC. iirc1+19euaafs4tu* 1un7 g cWhat is the magnitude of the electric field 5.0 cm fromgtaeiinu9 a+14*cu1r sf u 71c the sphere's surface?

  A metal sphere of radijypjcm+ ;fl:v1n y3f 2us 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the centmn fyf:;j3 2ly1pj +vcer of the sphere?