State the law of conservati k3e,,nr1xk kv b/gjv)on of electric charge.

  Is it possible for two negative :6zfb1*cwkb u; ov j;vcharges to attract each other?

  Is it possible for a positive and a negative charge to attrz17ggm 9) lhdo7, adjvact each other?

  A glass rod is rubbed with a piece of silk. During the proinaleeg-ovgx(+7(v qu *i (u+cess the glass rod acquires a positive charge and the eai -+ u 7lgqug+((nvvx(e*io silk

  A proton carries a

  The model of the atom shosc bf8bd;8 d8cm,8uolws a

  A neutral atom alwayhp1ha9 ev7wq- wmd-5 y7vp *gpyb5 qj,s has

  An atom has more electrons than protons.- . 0cbl r1z30fe:ylk txqpn/u The atom is

  Materials in which the ef:ezylobcabaqr)g uq)- r-t 3*h 27v-lectrons are bound very tightly to the nuclei are referred to a*y:o72hbrca e-lqut ab )q3 zrvf)g--s

  Materials in which the el7(md+t 3qzwp lectrons are bound very loosely to the nuclei and can move about freely wit +3dz(wt7qmlp hin the material are referred to as

  A negatively charged rod is brought near one end of an uncharged me;y5+y6wkbyp ctal bar. The end of the metal bar farthestyp6y+c bkw5 y; from the charged rod will be charged

  Sphere A carries a net positivee p+ap5mklt6b 7bz8r( charge, and sphere B is neutral. They are placed near each other on an insulated table.7m(pbe 6a8+rlbz5 tpk Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope positively?ris :4*9s bvof; bjxf7

  An originally neutral electr1edxq sw9m/2 goscope is briefly touched with a positively charged glass rod. g9dx1ew 2s/mq The electroscope

  An originally neutral electroscope is grounded brgdts6nuq,b;a*rh vn 5.r0a ;hnv j4j7iefly while a positively charged glass rods .aujjqrh gv hnrtn6;b,;*7danv5 40 is held near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves sepb ko;b5/vk wod1hbcz .a(y/2 larate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the leave kbw/c1 ah/.z2ldooyv b5(b;ks?

  A large negatively charged object is placed on l em6 3eln:xx 26hi*ahan 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, but6eim*3la 26hh lx:exn 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 Coulom ekn(fjq,89;syd z 2vlb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated bmb4xgda51f)*iet dhz)(dpf ,y a distance d. The first charge is larger in magnitude than the second chhfe*d zi4,)m1dbxap )t g(5fdarge.

  Sphere A carries a net charge and sphere B is neutra4jv ,99 kkn5kdrlh2 b.uxnml1 l. They are placed near each other on an insulated tuljbrx kn5h9nk12 l 9,.vd4kmable. Which statement best describes the electrostatic force between them?

  Two charged objects attract each oth4 bnr2hdu 18atccvc3:er with a certain force. If the charges on both objects2va3b d c81u :nh4rctc are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attray1mh6 aacm ,e7ctive forces of F on each other. If the charges are separated by a distance of d/3, what are the a c aeh,mym617new mutual forces?

  Two charged objects attract each other with a force F. Wh t0n5 ,bpe+odnat 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 o no+te0bdnp ,5ne-fourth its original value? The force is now equal to

  An electron and a proton are separated by a distanx o5*nbf8:e icflu 1cts8v u0yj01.hnce of 1.0 m. What happens to the:*u hinc y50 0uo8sc1vetnl.8 f1xfbj 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. Wha5ymlmq*ay t 9)tch+k, t happens to the magnitude of the fytt,h*q)ymlcm 9 a+k5orce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated by a dist4i *uu,vq7agmance of 1.0 m. What happens to the size of thegmi*u,v q7a 4u force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at thes ki.u;;nqtz, 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 qs, zt.ni;uk;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. Whg wanyn-4u /:r/jw zij7sm2f (en 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 tsj2 4ruzyj/ f :a7n-mnw(wig/he 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 nott(dyg3x zsq8jfv 8 2-g a vector?

  At twice the distancmx rxw-v)dj ,g +, zjjksj9m*3y0hf9be from a point charge, the strength of the electric field

  Is it possible to have a zero electric field value between a negative and posi j8zj(zn7sb83ujmi f7 tive charge along the line joining the two f8mu 73(78ibsnjzjj z charges?

  Is it possible to have a zero electric field v+lth0 a;d8lxqrj 4y5rc,-+ztdh( lo3yu0k fqalue between two positive charges along the line joining the tw;zhxur (yj+- o ahqd04k,lcyr8lq0ftl3d5+to charges?

  Electric field lines near psitive point chargesb6f4,qkybz+ 2yz)gfy

  The electric field showkvcnqsu2i n9 np+y1y; q93if1n

  Can electric field lines interses0c ua/mn qa77ct in free space?

  A solid block of metal in electrostatic equilibrium is placed in a uti:+.thtks;1e jxs :wpow96 wniform electric field. Give a statement concerning the electric field in the bl.s;1i6h t+tw:os :jweptx 9kwock's interior.

  If a solid metal sphere and a hollow metal sphere of equal diameters maaw10td- vf9are each given the same charge, the electric fiewa9t-vf1 a0mdld (E) midway between the center and the surface is

  A cubic block of aluminum rests on a*z,j5bj:9frp f)bt7danh2 aw wooden table in a region where a uniform electric field is directed stfn)jrw2h azf,bjd:5p9b 7*atraight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric cf4d(8 2cd7xx /kusae/vfqkt+8tr9 cj harge

  A positive point charge is enclc :dvatat ;n3.osed 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 hollowa3;:adct n .tv sphere has

State three properties of conductors in static equilibri61 r,64 l+tq7tt,m*icj taqh y cblx-wum.

State Gauss's law.

  The charge carried by one electron is;ry ie3ie6 n3j $e = -1.6 \times 10^{-19} \; C$. The number of electrons necessary to produce a charge of $-1.0 \; C$ is

  A piece of plastic has a net chargebe6,.uhgi;c yb:, 5 h.k kjc*ftsg6da of +2.00 mC. How many more protons than electrons does this piece ds6jetc u.*khkf ac,gyb b:;h5 ig.,6of plastic have?

  What is the charge o/d gc4 65qvlh*1(j4sjjx wmyin 1 kg of protons?

  An atomic nucleus has s y0wgj(ba7e) 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 ccgz2t-zg12m cm, have charge values of 2.0 and -4.0 mC, respectively. What is the 1 tc2z-m2zgcgmagnitude of the electric force between them?

  A 1.0-C charge is 15 m f/ )pi8qjw6o worom a second charge, and the force between them is 1.0 N. What is the owqo8i jw/)6pmagnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N )k3gz5av/reo . How far apart are they?

  The force between a hwa/ m ai*l,e*$30 \; mC$ 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.zm2mm 8 gnf:a2ew 4z.i0-N force. If they are move2miz8fz 2 mgmwe.:4a nd to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point kv7efm2 s.xhcm/ 92vvye;:gd h9jjl 2charges of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second to the right at x mjv2 vc:.hex/ehv 9yf229jl d ;7msg k= 50 cm, and the third is 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 x-axis. A charge of +2.0p2wxgss6 b4j5 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 electrost26bx s 5wsp4jgatic force which acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.2zroq. izrm(rv*b5oi 01c1k n00 mC at x = 1.00 m; Q2 =v2 q( m1roc kizo*r5z b1n0i.r 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 placed at the center ofb:.gl3o -mei; o ypk;)dwbxm+ h.j2s y 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 center charge if a third coylmkj s.pb.)b -+ 3oi;eh:gmdy2 ; xwharge of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC 1 a4h t;0rt wsi)p7*n-yt)wzogdu dl(is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whuh)47w-sa;tz )pog (wtnr did*lt1 0 yat is the 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 b,c8(fk3 7 j5uqyavdx, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net for3(5d,qu bajxk7 cy8 vfce on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertn:):s;x z0q t;+hev ne4ovv pzices of an equilateral triangle which measures 30 cm on a side. What is the magnitudqhpzvv 4:0;e ntoe) szx:v;+ne of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separated by 3.0 m. Aty8 cjb6;4xrp y what point, on a line between the two charges, would it be possible to place a cj4;y8r px 6bycharge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin kb4ei+m2v*hv and a +9.0-C charge is at x = 4.0 m. Where on thv bei*mv+h2k4 e x-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at thzilrj1wj *.p12ak 56mgbi;n r e origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed g.p 115in;jj mlrbawr2i k*z6so that the force on it is zero?

  A copper penny has a mass of 3.0zqow dt/n:j d s)a+;tme/z;. q 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 agaic/zp9p)zn1fg t3rtj* nst the force of gravity by the attraction of a fixed proton some distance above it. How far above thezg/ nt p3 ftzp)*jcr91 electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconduc0w6s7 a0l*g 8icjj 6qg ooyie5ting threads which are 30 cm long. Both are given identical charges, and the electrost7icgl0s 6 oy5a oj6ige0jwq*8 atic 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 ma e *q i:+8b7:b 5kk2uptomrlyfgnitude of the electric field at a distance of :lbkk*f b25 :p o78teu qirm+y1.0 m from the nucleus?

  What are the magnitude and direction of the elecs1j r4in ms8hbo5.jb 4dk- l4ptric field at a distance of 1.50 m from a 50.0-nC charge?hb4i4pbnjrk18d5o ss j-m 4 .l

  A 5.0-C charge is 10 m from a small test charge. What 1w qrh 68wcndr1 53x6l5riejk is the magnitude of the electric field at the location of the test chr n15 k i8w6qrhewx13l cd5jr6arge?

  A 5.0-C charge is 10 m from a small bh7drzuiufp:;s 90x; test charge. What is the direction of the electric fi ph:9f irsx; ;0z7budueld?

  A 5.0-C charge is 10 m from a small test charge. *cfrp* 33f hnzx)x09tpg( vds What is the magnitude of the force experienced by a 1.0 nC charge placed at the location ofd*3)v9(rnpfcxx*z 0 f gthp3s the test charge?

  Two point charges each have a value of 3.0 C and are z(//ae7l. 2 lfu gugyi7o nmh-separated by a distance of 4.0 m. What is th/ /gm lf 2a 7gzuey.-(7iolnhue 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 as*g;3; zudaqk -4.0 mC charge is placed at the 50 cm mark. What is thek;sazd3q* g;u electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm ,l, x :s3h/t jhv)memxog 2z59xrxo6a 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 ix z5 3e)mrvhxsjl2aogxo,h9 , xm:6 /ts the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 2lz:eo j803pvyl+ li land x = 0.20 m. What is the magnitude of the electric field at ezl8:3 jp o2lv0 +lyilthe point midway between them?

  Three 3.0 mC charges are at the three corners of a square of sd egq3z90el 4r5s0,gd nxzz3qide 0.50 m. The last corner is occupied by a er 9z,qs qg lg3zd e040z5x3nd-3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.rjfht 228 yvrbu0b n-tf;cueg:5hi,8 0 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 (1, 1); +3.0 mC at (1, 0); -3.0 mC at (0, 1). :c5 tjb0- u28,r rhh2f b8 vtenfu;yig What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed i; 3z qoq ;.acm+*lrf4u ztiidr7u( 6gat9g+wdn a uniform electric field. What is the magnitude of this electric c i a3 fu amzqzd(o;;.*qg+g+itlt7 u964rrdwfield?

  A particle with a chawa.j8r)px*6 g n -excorge 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 is8vuub ork-txrtk3206a f+z o 5 placed in an electric field of 6000 N/C pointing downward. What charge must58tf0urokbaut r -6okx2z+ v 3 be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC4* ,+ rhqwnmgj. The ball is placed inside a uniform electric field, and is suspended against w4nm+ rg*q, hjthe force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +u tur/x8uvtlg8 l1 b+.2.0 mC. What is the magnitudx lb1+ u8 tu8rltgu./ve of the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the equtbme(quv (je0;r1mj / dh22y icx( 6lectric field 6.0 cm from the center o6x1u(ehetv0 mcdu2;b/(yr qjj ( iq 2mf the sphere?