State the law of conservation of electric cha:kl, 8.z xgqzyrge.

  Is it possible for two negative charges to at; bt kj)e *ev07ybzfbx1ihn/,tract each other?

  Is it possible for a positive and a negative charge to attract each j m.gg( n bg7xd-+ iw+qdpa66zother?

  A glass rod is rubbed with1p3b 9 uz6o5;ehqiy xm a piece of silk. During the process the glass rod acquires a positive charge and the1h5 9mqbzyui;6ope x 3 silk

  A proton carries a

  The model of the atom srq +d urw7cris7r6(0zhows a

  A neutral atom always hayisd t :1s-q .fz2e4kus

  An atom has more electrons than protons. The ap6o1hd+b;br5szim v2 t3h 235qkfiv ctom is

  Materials in which the eleca 40;437h kecz rziudutrons are bound very tightly to the nuclei are referred za4uz d47i hek3ru 0c;to as

  Materials in which the electrons arqg6;e x wmse x***omr4e bound very loosely to the nuclei and can movm;rg* ms *4x6oxw qee*e about freely within the material are referred to as

  A negatively charged rod is brought near one end of an unxj2n9q::r qupcharged metal bar. The end of the metal bar farthest from the charged uprqnj9:x:2 qrod will be charged

  Sphere A carries a net positive charge, and spher.9r l1 gk2ipgiwd;c0 fe B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a w;.wi i0f kgcg pr9ld12ire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscopedzbzaei yf0;4l u/9g 2 positively?

  An originally neutral electroscope is briefly touched with a positivelyui * q7lfm(v2h charged glass rod. q* ifv27luhm( The electroscope

  An originally neutral electroscope is grounded briefly while a positively charge 1 bbax)0gx1;;qdpiymd glass rod is he p giq;dm10)xy ;bbxa1ld near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and0u,b: c2pb5b2(g u sg)p kvhpt the leaves separate. Then a negative object is brought near the electroscope, but does not toucb2)2b, gpsg b:cv(h5up0utp k h it. What happens to the leaves?

  A large negatively charged object is placed on an insulated tabq/k)c51 yyn5huz ho)i le. 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 the negative object. At no time does either ball touch the negative object. What is the final charge on each h)/uozyqihy)c n1 5k5ball?

  Charge is

  What are the units of 98ol 7e.iwmwk ), wqupthe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are sep7l9bt : dt(kmyarated by a distance d. The first charge is larger in magnitude than(y : db9t7kmlt the second charge.

  Sphere A carries a net charge and sphere B is nlla facx 3n7bh j7+(d:eutral. They are placed near each othe (3lja:lanc hb f7d+x7r on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attr. 2yl7hz/gjb *n3 e ,y,1ruev)eyhgedact each other with a certain force. If the charges on both obje, gyr) gnjeh2u,eyyd 31eev * /lz7.bhcts are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exerl *lf2nqkx)g- 5/ohq:i ise6vt mutual attractive forces of F on each othefk-h qolgs:/) 56l ix2*vieqnr. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happens to the for gg(bq1oda07s ce between them if one charge is doubled, the other charge is tripled, and the separation distance between their centers is reduced to one71(db ag sq0og-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happens t6h zx8nj8/ryj6tc: 7ik vt;t qo the magnitude of the force on jtvx 6 ;q8i7ytkjr thnc68:/zthe proton if a second electron is placed next to the first electron?

  An electron and a proton are separate3zejrnp(w2zhcl s rbn/h(k ix.hv7..8 g+*ltd by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a sez .bsh girj wvtl3 7kn+2*zrx pl8h(/hn..(cecond electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. What happen gy.16(.qm;pa+snhho m; 7hnc1kyl hos to the size of the force on the proton if the electron is ho6;y o1.pgclqak. n7hy; mhh (1mn+smoved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poin3mo 3ew yqbdc h* 8t3hnw76ft8t 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 *bcyq7f3e6 d3ntw tmh3w8ho 8three 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 j 0wpqpxiw4e31o*fx( equilateral 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 cenw0fo (*p1xe pji3x4w qter charge due to a third charge of +Q placed at one of the other vertices?

  Which of the following is now5.*pzf .famht a vector?

  At twice the distance from a point charge, the strength of the electric fieldt6a r8l3ndg4bwd b*.w

  Is it possible to have a zero electric field valu9r i0nx)hbc,z mle5g3s zr3 +de between a negative and positive char d3)rirex5 3cmlbzghn+z90,sge along the line joining the two charges?

  Is it possible to have a zero electric f uap-yxz4 lp(zm-0;3uft s 3i)vrz sj2ield value between two positive charges along the line joining the j3tf4 (mrsu;a xzz2s-0izup ypv- )3l two charges?

  Electric field lines near psitiitrcxyj2+th7v v q.7nd.o5h 7.y1vpp ve point charges

  The electric field sh77mv: r ztu*xbown

  Can electric field lines intersecna tgh r 0vv01 w dx9v;0gw6vi71ajtep4uu/;yt in free space?

  A solid block of metal in electrostatic ne, o ldnhw ;8yt.u,j9equilibrium is placed in a uniform electric field. Give a statement concerning the electrnty9.od,e;8 jwl, hnuic field in the block's interior.

  If a solid metal sph yl*;nki 0xmfo 8z+wq1ere and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surface isyioz0x8fqmw k 1l; *+n

  A cubic block of aluminum rests on a wooden table in t0ary- 9seti 2o(wlg1 a region where a uniform electric field is direc lesa-t0 r9o2w gyti(1ted straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic9x)t m0gb-ioz equilibrium near an electric charge

  A positive point charge is encloz bg+cyc9dv7e(jg ,8 vsed 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 the hollow,y+8 cgz9g7jdvce v( b sphere has

State three properties of conductors n7mj+gsaz j *-in static equilibrium.

State Gauss's law.

  The charge carried by one electro0v4)ix3 (fr tvtvo/o9rc, .i yc:e ahtn 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 tha2v6:nvb (d3oajn*qzn n electrons does thisv:b3jz(n6 * adn o2vqn piece of plastic have?

  What is the charge on 1 kg of protonde3:zztn, a*+isezu3e 0s cy(s?

  An atomic nucleus has a charg 3fd/+3hzphiee 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 ch(0i+u2we w xmnarge values of 2.0 and -4.0 mC, respectively. What is the magnitude ofei0w wu2n(m x+ the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the foru/bxnap;-l /4mpkbp 121yw wc ce between them is 1.0 N. What is the magnitude of;ppcbpb /4m/a-2 wnxykl1u 1w the second charge?

  Two 1.0-C charges have a force between them of 1r v4c3 xpr8-he pqro5vf4.t7c.0 N. How far apart are they?

  The force between a . 8d.pwho v;gj$30 \; mC$ 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 cxo4t /kbk9 84pn5/ftlmauq 6-N force. If they are moved to a new separation of 8.0 cm, what is the electric forcet5mpk //uqo a 968k4c xnbfl4t between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The first c/ biv-hd7 de7oi-hmv,na-bo/ harge 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 ele 7/v bdd-nvhaoom -eh-i,/b 7ictrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC *mfgee3dt1 k :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 force which acts dmg*k3:1tefe on the charge at the origin?

  Three point charges are lf):)1-up uqbf zpy;e kocated 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 of the force onpe)z-u bf 1 p:);qukfy the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square,3meyx.:.4x8ylyvvft,mfs 2o 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 center charge if a third charge of -Q is placed at the lower-left corm3my4. .x8ly 2t:x vsfvo f,eyner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, d/yk gd1y-(2qb s;qkx0.10 m); Q3 = 5.0 nC is at (0, 0). W ky- dkgqq(s/xy 12;bdhat is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0gd) 9tp siwe*sgs-;i ,.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What id )w, ip-gig;stses*9 s the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateyz19 s6yh(g5obp sjpm(+lp/wral triangle which measures 30 cm on a side. What is th/(+pyo9 1zyjpwhs lgs 5p b(6me magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separatduebhk:ks 8 95ed by 3.0 m. At what point, on a line between the two charges, would it be possible to:d95kb8ek ush 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 and a +9.0-C charge is at x = 4.duf2d yx xr0sbz3u3 590 m. Where on the x-axis can a 9dx0zu5d 3yf ubr3sx2 third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charg l*zti 75sriia.6f 2- uq(wfare -q is placed at x = 2a. Where can a third positive charge +q be paizf2 .l6iu7r*t-isf (ar wq5 laced so that the force on it is zero?

  A copper penny has a mass of *mjwxh* 0rou+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 against the f )km /tpamv 7-2/d2 znmoa1vpgorce of gravity by the attraction of a fixed proton some distance above it. How far above the elkz/da)o mampp/22-vgt7 mn 1v ectron is the proton?

  Two 0.20-g metal spheres are hung from a commh:g koap: +b *txn9jn1on point by nonconducting threads which are 30 jkbtx :pnn19:*o +a ghcm long. Both are given 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 charg+emj3u9. vjqv 7ux2wq e of +40e. What is the magnitude of the electric field at a distance of.jje7uxquq w39+ 2vvm 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance of 1vc/ep0z2xl of6rm. j5 .50 m from a 50.0-nC charm65f2jz rlc0v.oe /p xge?

  A 5.0-C charge is 10 m froz9d czjtw h*fv ;6)z*l,wl f.i(h+et cm a small test charge. What is the magnitude of the electricf chl z6f z9j*w) ,tzv* (ch+ewtd.il; field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. Wtw( b(9 k0p)yd/na 2s qesdd9rhat is the direction of the elec9k)s r(pa2dwq( yn/t09bd ds etric field?

  A 5.0-C charge is 10 m frro9grixn/; y ,om a small test charge. What is the magnitude of the force expryn/; ,i rg9oxerienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and are separatz(*vna9h3 c exed by a distance of 4.0 m. What is the electric field at a point midway between the two charge3*(hvxe9a zn cs?

  A 5.0-mC charge is placed at the 0 cm mark of a meter :ulbj--,tywqstick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 cmt qy-:w, jl-ub mark?

  A 5.0-mC charge is placed at the 0 cm mark of a met)sv)m,nfz )9gi k5o kber stick and a -4.0 mC charge is pla5i)))fm9vgkzs ,n k boced at the 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.k(/yhduf7rhhc5zb e ; /y*h3z0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between th3/uh*fhhr;5 k/yh ez(7c d yzbem?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. Thetn/v r6q:3ujq,i n lx; last corner is ocn ,r;uqnqvj :it l/63xcupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a sig* *02beurxhwgq gb0 ,yc2wn( de. Charges are placed at the 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 thxgew*brg b0ch*0 ,(q2nygwu2e electric field at the square's center?

  A force of 10 N acts on a wl .;5rua bxr7mjm/rml6t8-t v .p js1charge of 5.0 mC when it is placed in a uniform electric fi7ma6tlxw- slmut5jb/;j8 p. v mr1 .rreld. What is the magnitude of this electric field?

  A particle with a charge7vakk 7al vn0, of 4.0 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 l ny-1n veubne):pn* at)0r8a placed in an electric field of 6000 N/C pointing downward. What charge must8 1y:av) 0lpneu)abntn- *nre be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is place :whph;4j8)cowv3ir sd inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electj;oiwcph8hs r4 v :3)wric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnitu(9s/1j*pmpvcrry +unde of the electric field 5.0 c vp/* rpm(n19jysu +crm from the sphere's surface?

  A metal sphere of radius 2.0 cm carribtb hk5 7y.l6-7szdmr7np: ag es a charge of 3.0 mC. What is the electric field 6.0 cs7pbndkbhr776g y:l. tm a5-zm from the center of the sphere?