State the law of conservation of electric 5ynivyi5d q/fpl d.1.charge.

  Is it possible for two negative charges to attr5 gem4c3z ds0ract each other?

  Is it possible for azd 51(3mro6anhj b p:t positive and a negative charge to attract each other?

  A glass rod is rubbed with a piece of si9zt lzyw5u0ei :jg6+ jlk. During the process the glass rod acquzge:i 65+tzjl90jwyu ires a positive charge and the silk

  A proton carries a

  The model of the atom sh )mou16(lmdpg-7w,vtv1cec a k10;j kpgcm3hows a

  A neutral atom always hqc fzao4 /4 mp-j2ubg rka.6x5as

  An atom has more electrons than protons. The a49 1pk( wyqz6iu3p(c eaad0zz04vnvj tom is

  Materials in which the electrons are bound very tightly to the nuclei are refe: 2y2nu8-sgd. ancbcrk2k fm *qd3,lcrre2d*2 l 38fcy, -k q:urnccb.ksn2magd d to as

  Materials in which the electrons are bound very lo7))knrr lx2,fu aw2-)xky0 d mcrlej1 osely to the nuclei and can move ab2e02)m)1 c jlx- kwxnl, ura 7rdf)rkyout freely within the material are referred to as

  A negatively charged rod is brought near one enm;a r) xrd/ta8p(swh, d of an uncharged metal bar. The end of the metal bar farthest from arwpd8mx) ra(;s ,t /hthe charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. 1)ln lhm* g+--1kodfj(oqfk1xdki)d They are placed near each other on an insulated table. Sphere B is briefly tou(* f11hl g+k1lxo)kk j onqd)mi -fdd-ched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge n 6isuq6(ug91 zor0zlan electroscope positively?

  An originally neutral electrnk obzl q4(9y)oscope is briefly touched with a positively charged glassz9 ky4)n b(olq rod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively charn e r kqu7x/pzmy);77rged glass rod is held near n/uyq7zr7; k m7x)e prit. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separa/azeza l 3o3s3te. Then a negative object is brouoz33 l/asae3 zght near the electroscope, but does not touch it. What happens to the leaves?

  A large negatively charged objectn(16ttd7 jemm s*3 myc:c bc2s is placed on an insulated table. A neutral metallic bsc:c c7 1 y2md3bse6 j(nmttm*all 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 constjk(4q 6lm1uiwd8c1nn ant $k$, which appears in Coulomb's law?

  Two charged objects are separated b k68iihp+)gl yy a distance d. The first charge is larger in magnitude than +)8giy hl 6kpithe second charge.

  Sphere A carries a net charge and sphere B is neut6u ms x1rt8xr,uce1 7iral. They are placed near each other on an insulated table. Which statement 7,ru1ts6ri8uex1 cmxbest describes the electrostatic force between them?

  Two charged objects attract eav(p (o imsa cs7kmftl654cl;7ch other with a certain force. If the charges on both objects are doubled with no change in separation, the force betwee 7pof(c4sm5ti6lc;lkv am 7s(n them

  Two charges are separated by a distrupb50 d r7xp1ance d and exert mutual attractive forces of F on each other. If the charges are separated by a distanpu 0xdbrp1r75ce of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What vw9:5 rue+qo nhappens 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 valu:9eno5vqw u+r e? The force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happensjq2p9. /8 co/vcoilycsfq*m e 0*ung. to the magnitude of the force on the proton if a8ocu /.in*2q/mcyl 0jf.cv*oqe9s g p second electron is placed next to the first electron?

  An electron and a prai4q-c8js gv+ oton are separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is pla-qjs4+vcgai 8ced next to the proton?

  An electron and a proton are separated by .-otrz+nqx1nq p02ov a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0.50 m closer to pq o1z 2qr+-o0xnt.nvthe proton?

  A point charge of +Q is placed6g ww4dc2nvw2 at the center of a square. When a second point charge of -Q is placed at one of the square's cwv2 2dgn64 cwworners, 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 equilv;cjj7+ pii *b1fnrb6nks5:tateral 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 third charge of +Q placed at one of the oth 7b+tn6j vj:p1br*k i5s ;incfer vertices?

  Which of the following is not a vectj;8 b.v2 xnodkor?

  At twice the distance from a point charge, the strength of the electric fipw,zu sw9 02vqeld

  Is it possible to have 19x7p79 nhfv v: w:gvbi2j1xmk3 bwxha zero electric field value between a negative and positive charge along v nbfvxm7: 1j 1p2 7wkxhh:39bxgwv9 ithe line joining the two charges?

  Is it possible to have a zero electric field value be-7) nuxvhjw7d re9q+gtween two positive charges along ud9xh 7j)7g+evr n-q wthe line joining the two charges?

  Electric field lines neaek0 t1zaie09z. 5uu5* x dndnqr psitive point charges

  The electric field shf /xv;rdw y,rh7b,st l-z :vw2own

  Can electric field lines interssb9xoh:p4.w iup 9) agect in free space?

  A solid block of metal in electh*- 5wn kuwphx- a-q3zrostatic equilibrium is placed in a uniform electx--ah5u hq-*np z3wkwric field. Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere ann:-gi-uay(+qpj (l::edv cs yd a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the cen:-ue(apsyjni: (lqy+cvdg:- ter and the surface is

  A cubic block of aluminum rests 1z-769zwebui9vvlg c on a wooden table in a region where a uniform electric field is directed straight upward. What can be said concerning thcbv97l61v9w-zeugz ie charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric77et7g iyu qn75/3pmfyvyn 9o charge

  A positive point charge is enclosed in a hollow metallic spherekh*6opq mheh c()az) 6 that is grounded. As compared to the case without the hollow sphere, the electric field at a point direcoq m6hhkp)zaeh6 *(c) tly above the hollow sphere has

State three properties of conductors haa)kfzzj 2/ +w45oba in static equilibrium.

State Gauss's law.

  The charge carried by one electrojnjf6q3ji 9 +i9uybzuf ;.t.q n 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 protdj*.*l rc 6rtfp h0j2aons than electhr*lp 2d0r a6jc f.jt*rons does this piece of plastic have?

  What is the charge o lpves,kwa/zm04dj,n;c -ih,c3a 8 ken 1 kg of protons?

  An atomic nucleus has a chargkcbpncpy52 06buk 0c hz2:w5he 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 c4wq qw* tt. yk73b.mywharge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwew.t4k ytybww*3m .q7qen them?

  A 1.0-C charge is 15 m from av1gx+du :f- s oz47lx4 wy3nke second charge, and the force between them is 1.0 N. Whagl:okz4uxvnx4 w+17s d 3yef-t is the magnitude of the second charge?

  Two 1.0-C charges have a force between le l0 j;-zbw5srdp7d) n3km 3xc,rg +qthem of 1.0 N. How far apart are they?

  The force between a r b+ 6tlm/qgw-$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experience+wjcz:zc tv8 ; a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is cj+t z8c;v wz:the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The kqwxz .6i:ng e*4rli3 first charge is at the origin, the second to the right at x = 50 cm, and the third is at the 100xkwli3n g 6rqe*z.4i: 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 +hskybdn-j6 6( 2.0 mC is placed at the origin, -y(k dsb6jnh6 -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 on the charge at the origin?

  Three point charges are located at the following positions: Q1 9n 9toynxl cwtz-5,+q:sdc+u= 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC n-lotx,+y wcd+c:tq9s59nuz 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 k *pmd8t5 n;wmbb6,oss,s n 1q 5jbwq*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 magnitude of the force that acts on the center charge if a bqs*n knsbs515b,wm;6moq8,wd* tpj 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 z2 a;bv2cx7:zt xovx**dj y;r (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magntv rzjxa;:v zxd7y;2cx *o2*b itude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 9f(izb t4ql)d.z ifign;*; ,zot ro )g0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the directionfq)z r if(lt4goo.zii 9bd,);;ztn *g of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at t rpn5n+mfd (eto3zyu q 2ra58(he vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which actse 5ar+3uz(o2pn 8yf (mnd5qr t on any one of the charges?

  Consider point charges of +Q and +4Q, which are separateddsv00+ )blvtdir2) by by 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 forc2) 0ibd)vr0 tls+ ybvde acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x = 4.0 m. zhe- 3coa:uw ; Where on the x-a3wueo ;:h ac-zxis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin andh)0 8cvtkb:e3- gbpua charge -q is placed at x = 2a. Where can a third positive charge +q be placed so th e:3a g8)b0ctvkpb-uhat the force on it is zero?

  A copper penny has a mass of 3.v+m-5dt hf ,tb j :quh*szfs9-0 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 fixedbuap 0rs ((l0 5c*9 jh5yxpccd proton some distance above i usdbya (jr xlccp90(*hc550pt. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting t qo qcl)5xsb+)hreads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angq)lcqs +ox5) ble between the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charga)ams /iq xio3,jn 20ze of +40e. What is the magnitude of the electric field at a dist aq3ajno2mi/ s),z0ix ance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electriwqnq*xa ettu9jndy.on,v5,2am 7j1) c field at a distance of 1.50 m w,jtoq nm.ve7 15nduay,*)tjan q x 29from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the 9ktny33)jz/ldz nq/7xw41avd t6k gbgu c+8y electric field at the location of the test charzqnl n t7d91 gdw86z/kcvby/tx+4 y)3uj 3agkge?

  A 5.0-C charge is 10 m from a small t ezmf t3znnb50 jl 9p,k7+dou nh 7,dhbry2.c*est charge. What is the direction of the electric fiel5n b .3o+r 9 lmc*bk,djh0e hdu77nyt,fnz2zpd?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the fnqv2e4mo (x(gq--ef e orce experienced by a 1.0 nC charge placed at the locati (-mf(qe4e2 vno qx-geon of the test charge?

  Two point charges each have a value of 3.1ko 3 o,6.rljvx t)naj0 C and are separated by a distance of 4.0 m. What vj.36r,jxo )a nk1tlo is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm ma o,nf 6tcg/9ozrk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electr/o zcg6,tofn9 ic field at the 30 cm mark?

  A 5.0-mC charge is place(sp d:qt)pn v to6**ekj6e:w0 g,wgqp d at the 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on *:(d,q tpq ppwo eg) jn6v*tk0sge:6w a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC g2 n. n(ns;tauare placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between them?(n2 .agtnun;s

  Three 3.0 mC charges are at the three corners of a square of side 0.50 m.d3 7(v*ex 2vbmi; kwch0s i1sc The last corner is *3hs7d0x2ec visiwv1; kmbc ( occupied by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m z6. 3wl4ox trk/labirftnw*(,;c(wmon 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 znkwcw3a/ m x4*rw(tr lof(6.;, tbil at the square's center?

  A force of 10 N acts on a charge of 5.0 mC when it is f5p :(co3zspny,le i7placed in a uniform electric fipi cn 7:pel3y5 s,z(foeld. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a sbqlibgw47sih7 ) +b7mass 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 of x+aw/xher 23jd-g8 tn6000 N/C pointing downward. What charg8w 2-ajxxhn rd+t/e3ge 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 i8 tp*; +s0wimgs4elpq3st*a us placed inside a uniform electric field, and is suspended against the force of gravitye+0;s apu8w 3tmtgi4*q lps* s. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a chargnj6l +lbl,hl8e of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surl8+n l,jlb h6lface?

  A metal sphere of radius 2.0 cm carries a charge of 3. ; dk2n0-;lxtoki eu.r0 mC. What is the electric field 6.0 cm froxit02e-kk; l; ud .norm the center of the sphere?