State the law of conserv tman *ax12fso)afw 84ation of electric charge.

  Is it possible for two negative charges-mw2h,dtaik;o /p us9 x4 4js0ox az-e to attract each other?

  Is it possible for a positive and a negative charge to attract each othsh/v7c h6+b 9 f;fck6q owe*hcer?

  A glass rod is rubbed with aml0s n1:yw rj y46/kaasv)m,s piece of silk. During the process the glass rod acquires a poj ,s0 )m 1y6rlvwsn4ky msa:a/sitive charge and the silk

  A proton carries a

  The model of the atom showsr at+k/fx* :;jzmz6eo a

  A neutral atom always y 0l36xyc s70k5 kvcw,e5 f c9ijg,xxphas

  An atom has more electrons than protons. )4n w9jy9 pl*aun-qsn The atom is

  Materials in which the e vui7*e:4lc6 hr)rgbh lectrons are bound very tightly to the nuclei are referredci 6ur) velh*rhg4:7 b to as

  Materials in which the electrons are bound very loosely to the nucgah; gm 28)mr/8gpf / wedsod8lei and can move about 2;/ md/rg8 )d8fggmea wpsho 8freely within the material are referred to as

  A negatively charged rod is brought near one end of an uncharged metal bagq k bek-l/ca2.t.j1jztr8 2tr. The end of the metal bar farthest from the chazrkkt8 .al .jtje2-bc1/gq2t rged rod will be charged

  Sphere A carries a net positive charge, and sphere B iss5it9b/ravj0q7e0ly+df.r t neutral. They are placed near each other on an insulated table. Sphere B is75d /0vtf+lt.j9 er0y ar bqis briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod cem0cg9q9f2*rm8 a a prj7.mspharge an electroscope positively?

  An originally neutral electroscope is bf)d g z3v(f9zs: uouh5riefly touched with a positively charged glass rod. Thedu35:gfhu(f z9 o )vzs electroscope

  An originally neutral electroscope is grounded briefl) oas kh8p9ai8y while a positively chargepo9i 8 k)sa8had glass rod is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutrawdk bi tj)59g yckm0;,l electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to thej;tkci5)ymbg, kd9 w0 leaves?

  A large negatively charge-*dbwy3vb5o q 6 he5cz idaudkco225 :d object is 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 roll5wb-6dz cqkb 5a5o22yd e:hdiov * cu3s along the path followed 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 the Coulo87nrwft*4v3 4zrx d cqmb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first chargc 8q;9t( 1v*mq9 dlck4 nu a3+e/mo9jlzzwuzce is larger in magnitude than the second charg a+muwetc4k1qv;*(m lzd z9cn8 c99luz/jqo3 e.

  Sphere A carries a net charge and sphere B is y)d0g:rj9e;-1wbzj 5y5zinlle*v hqneutral. They are placed near each other on an insulated table. Which statement best describes the electrostatic force 5z9lv )e lqb :;5e1wjnijrhg0y-d y *zbetween them?

  Two charged objects attract each otherx 8iz9in1;.sy d oel+gwkea-ro9w:-x with a certain force. If the charges on both objects are doubledi -isxole 9-owgw9rzxd:y1.aek n8; + with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutua ) 7rgr)xl*b.//8.y/e ory 9p mvvghaa(wtmpgl attractive forces of F on each other. If the charges are separated by a distance of d/3, what are the newb/ .wa 7)emptrg9 vx /yalryo. *gmhg8(p)vr/ mutual forces?

  Two charged objects attract each other withv tu ce1+wsaevvn n;1n7yr43 0 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 is noe;3nvvsu t 1ncv+y4a ne71 0rww equal to

  An electron and a proton are separated by a distance of 1.0 m. What happen 1ikwk ,ftmhuq2w( 9n.s to the magnitude of the force on the proton if a second electron is placed next uw w92khti1nkq,f (.mto the first electron?

  An electron and a proton are separated by a distkwiaw8 3s3f blmk p9+-ance of 1.0 m. What happens to the magnitude of the fwa+kmi39bw3 f8 k ps-lorce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance ofpo4h(bx2 58ugjixze j,g 7 c,i/0n bed 1.0 m. What happens to the size of the force on the proton if thu57b g/,4 dno hgjzbpe82,x(x0eji ice electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center 8 s/,ozo-,rjqz s lwy9of 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 electrostatic force acting on the positi yo/98-s,zloj rqwzs ,ve charge at the center of the square?

  A point charge of +Q is placed at the centroid of an equilater2c/r5yl1u z m3nvg2 uial 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. Wuurm 2cvg12 35/yl zinhat 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 vectos d 44t3+uk1ulrz5m1) dh vccjr?

  At twice the distance from a point charge, the strength of the elect e09lmt m9zjj7ric field

  Is it possible to have a zero electric field value bet2 o;fg/ fqlcfqfu+ o87ween a negative and positive charge along the +gu2fcf ;7f qlq ofo/8line joining the two charges?

  Is it possible to have a zero electric field value between two posit ykc,tau 8cuz,+u o 04l:3oaelive charges along the line joining thoalutc, 8:4 l3c o+aezu,kyu0e two charges?

  Electric field lines neafhgsu (9 9slefq.k4q3o;+i6 mg5jj ddr psitive point charges

  The electric field showne j )lk2vjvv j9+ns* vjd/o*5f

  Can electric field lines ir4.ca /pwi+wd:yvw u5ntersect in free space?

  A solid block of metal in electrostatf )(qyk-dusn4qro/4 v ic equilibrium is placed in a uniform electric field. Give a statemenn4 u r/yodfqq )k-sv4(t concerning the electric field in the block's interior.

  If a solid metal sphere and a hf.s 1a*qvc5jx ollow metal sphere of equal diameters are each given thexva 15qf *scj. same charge, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum r562 prnp vvh7nests on a wooden table in a region where a uniform electric field is directed straight upward. W pvp2hn7vr5 n6hat can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an elhyvlb j 0rj b:cg0/7s;ectric charge

  A positive point charge is enclosed in a hollow metallic sphere th0w ckcl t;d 2 )yb23.sw9s)vluiv1zltat is grounded. twyui2 ctl)9;cvl1)slv3 . w2zdsb0k As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in3eqs q7w 2wpw. static equilibrium.

State Gauss's law.

  The charge carried by9fr* l7u ed l6yc(psa.z ju)c36 u w6uws8g:cn 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. :zky)p m 5w )l7c qagn)pk-jo7How many more protons than electrons does this pi)7-njwlqgk) ap75 c )poky:zmece of plastic have?

  What is the charge on 1 :c :n eg uzl2z6iqnp;)kg of protons?

  An atomic nucleus has a ch5:vc25 y.przh6 vhv l)mk5xudarge 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,uni( s 782d*e7gjmbxr1c2e fy have charge values of 2.0 and -4.0 mC, respectively. What ism(*ed2g fen sy cj7bix8271ru the 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 1lvkn;d0da /j/zb 18pa .0 N. 0djbad 8a/1vp n/zk;l What is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apar ne1j 9rgnxtnp7 )*8gtt are they?

  The force between a 70zw z jv;7ebqw4wfb,oq.d0e $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experienc t3tl,.,1wr zq*f axgle a 1.0-N force. If they are moved to a new separation of 8.0 cmttqr zf*13.x ,gw,la l, what is the electric force between them?

  Three identical poin/*rif,lh0m ;j vbgu0it charges 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 is at the 100 cm mark. What are the magnitude and direction of th lj/vmr*bfhgi;i0u0, e electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the ym -xoco8gtk:5x .o*k x-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 cm mark. What are the magnitude and direction of the elc- g*y kotkxo:85mo. xectrostatic force which acts on the charge at the origin?

  Three point charges are located at the fowc 5j7wl(j))sw4 jsgd llowing positions: Q1 = 2.00 mC at x = 1.00 m; Q7scsjjg4 jw5)wdw (l) 2 = 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 charge?

  A point charge of +Q is plaaankv k74l( v34e 9axoifq 1m)ced at the 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 4nom 7)k(i 3v9a qfevakax 1l4positive 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, 0.1 o gl1q0gze-hz-e q7 r:ap-g8r0 m); Q3 = 5.0 nC is at (0, 0). What is the magnitq07-g zlpge: - rogrzq-h8a1eude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is b9c4agnp.wq 1 at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of theabg.1q4wp 9cn net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vergek ,ltvl1m6 r so3r,0tices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electm k1,te0 rl gor6v,s3lrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. At what po zvcb+ 3;s. 1c4 0gvp1w6gstdqpku3 snint,.vqgv n+z;pgsc431 t6dkbs0 1 3cpwus 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 zero?

  A +3.0-C charge is at the origin z lbiuq.yz ;6z7b-i) dw7qe.uand a +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on it is zero7d z u.ub;z- y6.bzweiq)7iql?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Whi/g5 i(:rg w fjq q yzw3;j.pp,ppkat1wnn(33ere can a third positivetiwpzp(n1 j3fqq;g p./g:w a,(5w3k iy3n prj charge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 n07a a7m5g0he wep5 abtt5jt7lsej+v* q+uw4 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 against the force of gravity by the attraction of a fixe wyyk*,so4ni13ear-h f2 mf7p1 ct80 e,aikatd proton eka2ca83 pe4t0o,m7 1i,yyn wf1s*a kt-frihsome distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point bxa)t0f x0pfq (fe7c8 by nonconducting threads which are 30 cm long. Both are gif )xa0pfctq ef 7b(8x0ven identical 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 electric )+ohkr jvvnj/.dw3tw/ e+/ rxfielrvrk/3 .e/vjho jnw+t)x w/+d d at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction ,qd2ova an/ 8rof the electric field at a distance of 1.50 m from q,o/ na a8vrd2a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test wq0v(/ xr i;7zur5t pfcharge. What is the magnitude of the ele0tpzr;/v5w u(x rf7q ictric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is tha4c+1mxw8 e1n 4aklrse direction of the electric fie wsa4+mk114xe ralc8 nld?

  A 5.0-C charge is 10 m from a small test e hymnv/gy d49cl11 c/charge. What is the magnitude of the force experienced by a 1.0c1yey h1 //nmcgv 4d9l nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distancq+iz-guntf//ive01 r4 j wa-se of 4.0 m. What is the electric field at a point midway betwe /+r4fwtniuvqsg - zi/j10e- aen the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick atz3 ibb 8;m7rznd a -4.0 mC charge is placed at the 50 czzmr8b;7 t3bim mark. 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 stick and a -4.0 m2ky93cgay +comlxp()C charge is placed at the 50 cm mark. At what point on a line joining theymac+ yp9kog lcx ()23 two charges is the electric field zero?

  Two point charges of +3x: w h0gr15ies cmdnpg /ed-8(.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway58icxmgde1pngsr :0 w/hd e (- between them?

  Three 3.0 mC charges are at the three corners of a si76 y g h3ur g*tlx;:eb5w9zyiquare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the el;i6 h zlgrbgw*xut93ey:i5y7ectric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are placed at the ,msfmae9* jt+lc ) znr3h/eb)corners 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 fie9tc j,3f/s+r*me)ea h)nbz m lld at the square's center?

  A force of 10 N acts on a charge ok-ospk w *.y6 c pcf1d(z3w*cpf 5.0 mC when it is placed in a uniform electric field. What is the magnitude *cz- k6s13owpdf(*cp pw y.kc of this electric field?

  A particle with a charge of 4.0 mC h3 vgafb6yj( :yas 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 gpa;b0ai8xvyivn ra v2)(w7o3 is placed in an electric field of 6000 N/C pointing downward. Wvaxp y )a02(nbv 7o8raw ;v3iihat charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carrxyrl9;20vs oc (d4smgies a charge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended agains sc 0mrds;2xol(94y vgt 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. What is the magn kc,1xi;xqrx of*h2 s /8exqw9itude of the electric fic*eh1q 9xox8fs2kqx;/ r,wx ield 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of3k59nq3 rv jba 3.0 mC. What is the electric field 6.0 cm from the center of the s3jaq5 bknv93 rphere?