State the law of conservation of electric ch/a6yl wwie5*ygmqb:j ) x 3cy)arge.

  Is it possible for two negative charges to at023k-re.f3f xtp hll itract each other?

  Is it possible for a positive and a negative c l ztlc6pm-(n-harge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process gyh63 t p)z-jcyz3) jwthe glass rod acquires a positive charge and ty)j gpwz3yz3 -6j ht)che silk

  A proton carries a

  The model of the atom 8+ cbrgbtikh5e8 w eih6npf 43-3y+rpshows a

  A neutral atom always 8;fe -mz k9iiqhas

  An atom has more electrons than / m-jeed3y;jhl8))t3lw //li ew b nckprotons. The atom is

  Materials in which the +d 8 tucub oslq0clo6ow6z,.;by p1o. electrons are bound very tightly to the nuclei are referred0u6ozlu1+s.q oo8bd .;t6,c cbloy pw to as

  Materials in which the electrons are bound very loosely to x3yovwz+m j vcj-00/vthe nuclei and can move about freely within the material are referred to axm vwjj0 o0/3v-yv+ czs

  A negatively charged rod is brought near one end of an unchargedt n6e(y4gmx 21kudl f7 metal bar. The end of the metal bar farthest from the charged rod will be charg4eu6ln2k7t df x gm(y1ed

  Sphere A carries a net positive c zjhfo--ox e:mzr a3jy8, 5d:zharge, and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is8yo-zoje dr:5 j3f,m: a-hxzz correct?

  How can a negatively charged rod charge an electros, h ty- )bbf3cr.hhaj(cope positively?

  An originally neutral electroc3 d7v- 4o0pixrbhqg 3scope is briefly touched with a positively charged glass rod. The eleorb-x hdip 7v gq4033cctroscope

  An originally neutral electroscope is grounded briefly while a positive3 9s8sriqk u u5tac.ff)rp4 9gly charged glass rod is held neagk)4piucu 93r9f.r safq ts 85r it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. m3ac*fa-m gxkow1(vv; t p8zk+iu/k1 Then a negatikgukz m-t1kfox/p a + v8mca3*i1 w(;vve object is brought near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on andg yxw:.-.ek; :qy m6wmwb 5nd 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 rollsbw::e6yyd5kw..gnq- wdx m m; 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 t,p0imh(9gp sw2,g xmghe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d. The first cha m9vod+a8l8 jtrge is larger in magnitude than the second chaol8dmv9a8+t j rge.

  Sphere A carries a net charge and sphere B is neutral. T uacz tg+yo0sq,*mi*c m uh7:,ubj2l8hey are placed near each other *uuc2hq atm 8,: 7zcj0+,so*mybgu ilon an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the ch n 8utg9c)x-zdarges on both objects are doubled with no change in separation, the force betw -xu z)c9tng8deen them

  Two charges are separated by a distance d and exert m/ddz 6vrk:b5d utual attractive forces of F on each other. If the charges are separated by a distadd:r5zk6 d /vbnce of d/3, what are the new mutual forces?

  Two charged objects attract each other irs3k.m7 /s5zobrgj: with a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, a5jbg/m .isk :7 s3rroznd 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 seefx2zvezx(3ec:spxyt2 a: g .mc*w /)parated by a distance of 1.0 m. What happens to the magnitude of the force on the proton if a second electron is place:/3*m c ax gvz(yste:xxc2epef).2 wzd next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happ y d lbpq3r4(2z 1aa.52 qi.d *8hiwpqge,pbonens to the magnitude oi2dgq3wabd 2e5 q(,.q8phn*rioy z1 lpa p4b .f the force on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separat5)15p xpil+15auldl(bozm b ged by a distance of 1.0 m. What happens to the size of the force blbd l um+5z1)a5px1(ig 5olpon the 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 seconedb+- bff 46gyd 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, identica-debfg+f 46byl 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 th kkt-a;0-s m ubq9ghy,e centroid of an 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 center charge due to a t;bsm 0-y,tk qg-ukh9 ahird charge of +Q placed at one of the other vertices?

  Which of the following is nhm6nus0y hy :2ot a vector?

  At twice the distance from a point charge, the strength of tk;vgyi,1bwrkyy ) 2-p tt8 ,byhe electric field

  Is it possible to have a zero elects 0ym *s98 ydpgvonp m5(o,/v3cs t0ubric field value between a negative and positive charge along tpo8*m(ou y /sp50bdcyssnv0 m,39g vt he line joining the two charges?

  Is it possible to havec9 ;sp+1evve(. yqjvx a zero electric field value between two positive charges along the line joining vse j9(.v ;y1vqe +xcpthe two charges?

  Electric field lines neal9:uqhjz-2-ns k9 ffjr psitive point charges

  The electric field s w fw-+ztb(y61g9kdh yhown

  Can electric field linese9 i/ ldjbx9*r intersect in free space?

  A solid block of metal in electrostati2h *9 ohb bm1uxvblq6tll),c) c equilibrium is placed in a uniform electric field. Give a statement concerning the elxvb)*) u6hcb2hb l ,l9 lm1toqectric field in the block's interior.

  If a solid metal sphere and a hoizs1ps t-0 m.wllow metal sphere of equal diameters are each given the same charge, the elect. ispzws-1t m0ric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region whecv5tw(sou 0 op6 icr+1re a uniform electric field is directed straight upward. What can be said con1 6ocwti uc50s(rp+vo cerning the charge on the block's top surface?

  If a conductor is in electrostatic0d,8 18ne3:wfjbemgd ryu.q+*sr cwv 5cm3 f p equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere:ouy vsh0r/k ;l+*jmz that is grounded. As comparms0/ o:+u;y* vr hzlkjed to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conduc ,f .hot,1ea; a:nblk1lzymo ;tors in static equilibrium.

State Gauss's law.

  The charge carried by one electron+ g+w kb(fgc6)6npzb d 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 haski 1hm:q+ m u)-bin.-mox+ rxz a net charge of +2.00 mC. How many more protons than electrons does this piecex )z rm-nx:.q i+mhmu+1iok-b of plastic have?

  What is the charge on 1 kg of o zwci+bv;m 2:gp(hdhu65v+ d protons?

  An atomic nucleus has a cczn .ydlub ,, 0c.mb,.e3bnkpharge 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, hf+:lxjw rn / .6)0jj ;rqjo 10 barg4zgrnenj8ave charge values of 2.0 and -4.0 mC, respect+jxjq:r n rn84 jal)6/.gfb 0rjro0zjg;ne w 1ively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between thems+h c(wi:/t d fe4*avd is 1.0 N. What is the magnitude of the second chad*tceh+/ (w4ia s:dfv rge?

  Two 1.0-C charges have a force beta) jyk4pk( x1vween them of 1.0 N. How far apart are they?

  The force between a vgz-/ ea j*k7c(j aojgftj-/8$30 \; mC$ 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-N force. If the8htucolijk.5-br 49zrl (- umq6 (ap zy are moved to a new sep8tluqi-(5rkm 9 ublj. h(zc 4-orpza6aration of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are pla phe;sf68ax 9eced 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 the electrostatic force wee98; sfxah 6phich acts on the charge at the origin?

  Three point charges are placed ox64m*ka-tj cw n the 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 elmjx kt*ac -4w6ectrostatic force which acts on the charge at the origin?

  Three point charges are located y zh ycrv-m0m7x*r)q. 9fag*iat the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3rz iqg-r0*mh*yx)7m9a c.yvf = -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 plak9s.8sayr sshl4* hl*ced at the center of a square, and a second point charge of -Q isl *hs4s.8* ahs klrys9 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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is ac.zu3g6yb5 2eh ay92owng+ iot (0, 0). What is the magnitudo9.be6 z+igw2oc 2gnu3a y yh5e of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 5f 6azgustp v,(;3 u0j rxwfa.m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the u a3z6g r;sfa w.jpv x,50ft(udirection of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at th:k h9x2bbs4n,e 1mw8bi/jgege vertices of an equilateral tgb/kginhbw,b :s48mej 192xe riangle 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 and +4Q, which are separated bympv-7z/ f, jdgz+ m,yw 3.0 m. At what point, on a line between the two charges, would it be possible to place a charge of -Q such that the electrostatic force acting7,v zdm/jp +gz,y-fwm 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. Whvvd s7-2wuhwn / aiyz( qa;w67ere on the x-axis can a third charge b-w7 (hqwd6/;svnaviya 7 wz2 ue placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Where yz* wwq:xw ;.dfro9 ( f3so-vfo10ujd can a third po;uxf-r .(: *o qds1jyz9vwf0ww3dof ositive charge +q be placed so that the force on it is zero?

  A copper penny has a mass of l r5vxvqy8sk.2 m4(zgcj 3fu63.0 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+ko zk7w ,u*vz attraction of a fixed proton some distance above it. ok,kv u7+w*z z How far above the electron is the proton?

  Two 0.20-g metal spheres areyt,u/ o1tl/)/* cil,fkrivbd hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart untiuob , t/lryfv)kd/ti1*li ,c/l 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 el4duzeccq:fnau + 73vw0v e+z*ectric field af7c 4 cuvzavue+w +n3ed0z*:qt a distance of 1.0 m from the nucleus?

  What are the magnituannth; ydr1)4 de and direction of the electric field at a distance of 1.50 m 4r 1da);n htynfrom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge.uqjd4u6ld,x 5w;n c o6 What is the magnitude of the electric field at the location of thex o6uwl qudc n;,56j4d test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directir5m-7em-auwl; uj;a non of the electric fie-m ;uamenjw-5u7;a rlld?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the f gqx.qgno7ez*vld4ms+ 82m (jorce em4x (gqn +dsv2em.qgoj l78*zxperienced 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 arp,sn3 qa jd rn(xs:9f3e separated by a distance of 4.0 m. What is the electric fi3q3n(p9 srsjaf:dxn, eld at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0-3a(qpxwvert993 r(5o chj 0r (uangj cm mark of a meter stick and a -4.0 mC charge is q9a(x-g3nrrvcr j(u eh0ao jw53tp9(placed at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm wtllj)l2 yb*6mark 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 ) b lwytlj*2l6charges is the electric field zero?

  Two point charges of ony :;*ub:won m gi ,i8ayc1.f+3.0 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 poinm*ay,iiw: :c oyb.on;nuf8g 1 t midway between them?

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m. 2+ q6 dysgizxb:t az:)The last corner is occupied by a -3.0 mC char):6t sdixb:z2z q+aygge. Find the electric field at the center of the square.

  Consider a square whkdp+ld+nsb 1:ich is 1.0 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). What is the magnitude of the electric field at the:k1 sdpdl+ +bn square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is placed in a uniform electr2):k we*2cefdd a h8sif) wc:y*ee8:f:hawkdi) )cysdfwc 2 2ic field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass of 94mcjg n2rt 2s$5.0 \times 10^{-3} \; kg$. 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 of 6000 Ntiuosg( .t;z s7j:oq4/C pointing downward. What charge must.qug (os 47ioztjts; : be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g rhv4jcq0na f 5d .-8ljcarries a charge of -2.00 nC. The ball is placed inside a uniform el8 r-0a.5f dqjh4ncljvectric 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 carxd+w+ t7f c d .w7dnn4o04szgmries a charge of +2.0 mC. What is the magnitude of the elec 0mzo7ct4gfd +sw.ndn w4xd7+ tric field 5.0 cm from the sphere's surface?

  A metal sphere of radiuvtou1hk*tzm 7 8jj,o ;s 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 k8;u7*mhvo1,to jtzj cm from the center of the sphere?