State the law of conservatu2io6cr7w x8m)u:jgvt o6k n*:i3 grrion of electric charge.

  Is it possible for two negative charges to attract each other4+ed6o lk1 qdp?

  Is it possible for a positii+,izn:rerx .r4medo ;rr d5; ve and a negative charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process0 ja2gmkvzr(+i 3w s0s the glass rod acquires a positive c0wk j+ 3rgsi 2sm0a(vzharge and the silk

  A proton carries a

  The model of the atom shows a;sxlip*pu bfyq7+ 9 -y :yn:wskmr9+a

  A neutral atom alwayem ;y 8 4s9hzeu/nu7dkpip ,*ts has

  An atom has more electronlb7jti,v:(gmrydv)r.i u h), e 0.o mts than protons. The atom is

  Materials in which the electrons are bound very tigh o 8zt*d59mbqptly to the nuclei are referr mz8*5 dtoqb9ped to as

  Materials in which the electrons are bound very loosely to trx atrt*s 99q:e6t3eh he nuclei and can move about freely within the material are referreda:9qr s3terx6 th9t *e to as

  A negatively charged rod is brought near one end of an uncharged 57x/(y0z e xmb+mdlmgm / ep6kmetal bar. The end of the metal bar fam/medm6xp/m e(lz 70k5gx y+ brthest from the charged rod will be charged

  Sphere A carries a net positive charge, and spher qnus3 6gm; )dli/or;ye B is neutral. They are placed near each other on an insulat;;isr /3mlgdyu no)6qed 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 pos +g r*w6jhr r djl;p:)a3o*jnmitively?

  An originally neutral electroscope is briefly touched with a posb2nn p6::0mg -9la ud h(dlpmxzsa6 9titively charged h(ua0n mlpblg: d 6:-9nm9xpaszd2t6glass rod. The electroscope

  An originally neutral electro,zdy5mibg5 +smh -. dfscope is grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, the electrofh,m55. yid-g m +zdsbscope

  A positive object touches a neutral electroscope, and the leaves separate. Theneco3 ip; blt1( a negative object 1;e(iclt op3b is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table. A n*ikr+)apmj,5 xc9 xkp vtc;t9mip17deutral metallic balltppkp9i9v 57t,xm x 1cr )ac* d;ij+mk 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 ball?

  Charge is

  What are the units of the Coulomb conh0 fmu.j3u3 ;fm4klu lstant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first charhk *x sma;)hgvm5y 04dge is larger in m h5;*ha04d )kmyv xgsmagnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They artoo.7t -v,p mae placed near each other on an insulated table. Which statement best descri7po.,mt to-av bes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charnbf3i5 6w2c pxges on both objects are doubled with no change in sepapwixbc2 635fnration, the force between them

  Two charges are separated by a distance d and exert e uh )bb-h- v3*7uwxwimutual attractive forces of F on each other. If the charges ux*3v7wh --hbbwi e u)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 hap zhrbf+ sf;i,kr5 z cj)t.*ed8pens to the force between them if one charge is doubled, the othehb z)8c. idskf ;j+, tfer*zr5r charge is tripled, and the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. Whatbhid 3h e *;bvu,vg1xe(7c15udsckp* happens to the magnitude of the force on the proton if *cb7ddbhuuvpv1xi3see*( ; 1gh5 ck, 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 happeipui. gn,b/.f (8bg e)-mwfcpns to the magnitude of th - un. pb)mewg/ .cif8ipg,(bfe force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. r3wa 2xqce/3q What happens to the size of the force on qwx r 3acq/e32the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second poicq2-3x j)ankm rmd) m-nt chmxmra3nkmc )d q )-j-2arge 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 positive charge at the center of the square?

  A point charge of +Q is placed at the centroid of an eqx6w0vxp a * (ugfg.fl4jca33k uilateral 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. What3f uc4a(kagp* xjvgx6.f wl03 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 vectoraa4ja+r:q5( fgtu+ c m?

  At twice the distance from a p qz4jt9 bil+nyuqa, opx3k 8x6:j; sv3oint charge, the strength of the electric field

  Is it possible to have a zero electric field value betwe1b7pz zu/q;*f.indodw me) w +en a negative and positive charge along the line join;u+. ewd) zbzo71m/*pfi qndwing the two charges?

  Is it possible to have a zero electric field value between two positive cr02f / f/vv r4r3jvfvh8arhgw-zig3.harges along the lin rarg4j vw0r3vr .hf-f /gf 38vih2zv/e joining the two charges?

  Electric field lines near psitive point chac armf5z-0e7 erges

  The electric field showneyo tk/z zynw(om06d/ et( ,)d,i:b cf

  Can electric field linewh o :xi1ix4j 7;t7h 2x/nbcxns intersect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uniform elea+3zl( se3g+ko;cu r3l phr8gctric field. Give a statement concerning the electric field in the block's inter rup zgh8l+k( s+333r; oelgcaior.

  If a solid metal sphere and a hou0n/jn;yd 1iy54yfc ya9 ;xpellow metal sphere of equal diameters are each given the same charge, the electric field (E) midwy;f pa59jyn;u4dxn/1 0eyc yiay between the center and the surface is

  A cubic block of aluminum rests on a w s3v 40rzjv(bzooden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top surfaz zvj bs(v340rce?

  If a conductor is in elec(yal(t; acz ,gj/gu7qtrostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphaxia*.p bd .rks41bv+e.n /ltere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sba/ itvk.p*41 b n rl.des+.axphere has

State three properties of conductors in static+lau p ;)frvgr3wjq7- equilibrium.

State Gauss's law.

  The charge carried by2zjum/nw/:; nq t2 vjm 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 t60hrj 8 mbg;v s( zfly8x:nf (j*ym1lbhan electrons does this plryjzn8my *; gj1 v:(0hfbfbs( xm6 8liece of plastic have?

  What is the charge on 1 kg of protonsce69deeptvm-0yzom c r6t ;:1?

  An atomic nucleus has 2 5:hhamjtx+2de5j hu a charge 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 jgf7kvsp k;,9 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magjsfkg7vp, ;k9nitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge,cf;so1u8e eph/j,b3g and the force between them is 1.0 N. What is the magnitude of theuep3/g,8sh1c; jfb eo second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far aparle n cj.pvccg2/i6(w(t are they?

  The force between a ,hich*:e;rb w6ih:2ath z(n f$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, exm-a4dbi n8x+hw a qm02t x/7rmperience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the em+wx 4- xntr7 2q daahm/8mi0blectric force between them?

  Three identical point charges of 2.0 mC are placed ooimh: 3lo )kfu0o5t28lpa+zj-ep 5dqn 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 ma8 oaml-i:+utl d 0oph3qz55)okf jpe2gnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A cma0wb k kpjfcs+s;/6oni 1 d vj*q *q/95pbko9harge 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 /n9;k*p fs9+ *1b wo/ia okj pdm0k5svcqqj6bmagnitude and direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 /9fjt * bhr1z8j82m a9qbzhqk = 2.00 mC at x = 2z fzmr9bbq k9 th8a1h/8qjj *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 charge?

  A point charge of +Q is placed6f .1 d25t(gf* vl iykaszj-ir 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 positive charge at the center. What is the md1a *ii yj 6rf-.zfts5 vkl2g(agnitude 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, 0.10 m); Q3 = 5.6i 0xxo :q1v yr*---yqyxe-c4d xtwnd0 nC is at (0, 0). What is the- yr dx6q-ey*-q0yic14xtvn -x dxow: magnitude 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 at (0, 0.10 m)e(ns, yf)( zgqie20 gfdc+df ,; Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the g +zf2di(ffgc0e,()nqs y,d e5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral tarrx1q69zao 8t / xr0g,ep z3hriangle which measures 30 cm on a side. What is the magnitx/zthzrp xg3rr018,9aaq e 6o ude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q/r(1 igu lq-yh, which are separated by 3.0 m. At what point, on -1/yq(uh igl ra 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 and a +9.0-C charge is avf1 k3p3q3nz(e)c snrt x = 4.0 m. Where on the x-axis can a third charge be placed so the net f3pzn rqf )3(ck1 se3vnorce on it is zero?

  Charge +2q is placed at the origin and charge -q i5ls/g.lb ov/jy;u* )pz0yx dfs placed at x = 2a. Where can a third positive charge +q be placed sous l)dgjl;v /byxp z0*/.fo 5y that the force on it is zero?

  A copper penny has a mass ofs fqh: 5u6ta5 qd8sr5 m7hcmh;y.n,84klteic 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 force of gravity by the attraction of a goe6r8 f u4ig1-f+kx ffixed proton somex f6i-k 8gfef+g 4ru1o distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducti z/utcl3-6kg7,ja-u ae3)c n1agzlzcng threads which are 30 cm long. z )1,/g76au a3luz jt- 3gczcnecka-l 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 charge of +40e. What is the magnitude of the elex3 p5(xy+u 8qkein)4hc(8 jt 8yftjbkctric field at a distance of 1.0 m from y +jtkp 4thc(q8fej)38k uin5x(8byxthe nucleus?

  What are the magnitude and direction of the w- i k/dfcjb36electric field at a distance of 1.50 m from k6di/bj 3fw-ca 50.0-nC charge?

  A 5.0-C charge is 10 m from a4an* tbwzu-)zbc e +e: small test charge. What is the magnitude of the electric field at the -w4a+*ec) n bbutz:ze location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction oat0frga8 z7zvns eef 7*19 c9of the electric fieldf 9e9 aoz fg7ae7t*r0z c8n1vs?

  A 5.0-C charge is 10 m from a small test charge. What is th(e5kv/qeyo)c j kg8,t e magnitude of the force exp)k5g (/j ,yvote8kcq eerienced 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 separated by a distan-o,n ckscmy-orc); ad chr9ie4;37aece of 4.0 m. What is tcn3os;ko,mr 74 ;ciyae-ecr c-a9dh )he electric field at a 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 chargnci7g u59sf1 lc8dj: ):vr trwe is placed at the 50 cm mark. What is the electric field at the 30 cm mark?)uf9c v5nircjr1 g 7tld 8w::s

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a s/teo cvt a1yji:4i *r zy+0kxjz;r:8-4.0 mC charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric fiei*0 1/a: x+tycz:kjo zey8rt;js rv i4ld zero?

  Two point charges of +3.0 mCz:d vv8-l, 8dbvkf*que 3+ijk and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitudk3d8 dq k-b:zi+*v, vjfl8v uee of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square of smiwc6 th;4+r qide 0.50 m. The last corner is occupied by a -3.0 mC charge. Finw 6c;4i+ qrhmtd the electric field at the center of the square.

  Consider a square which is 1.0 m by*vt 0il+e;ti6eyq 2 ;ndgp( lfc/b2on a side. 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 the electric field at theic2(fb/tt+ 0bdyv 2yl i6;; qp gnle*e square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is 2 5wbpf kp0d,hplaced in a uniform electric field. What is the magnitude of fwkpp0,h2b5dthis electric field?

  A particle with a charge of 4.0 mC a6- s7v6hgjnn itnrc5,o,o 4yhas 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 placed in an electric field osj)( tci ;t-bxf 6000 N/C point) ti- jxt(c;bsing downward. What charge must 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 m fap81 5:u;fgdbk2cad inside a uniform electric field, and is suspended agc8f:agku df5 a1;bmp2ainst 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 mag 5psormn5fl+3 l4kcg1r2zm 0initude of the ele ic fz5r1rklms3n20pog5l4m+ ctric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 l f;s /0xjv9-rv; twttmC. What is the electric field 6.0 cm from the center of the sph0jt fl;wx- v;svtr/t 9ere?