State the law of conservation of e;h ::j;7 dh zcrchi.mj*shc3 c ;q+klv(rsnj+lectric charge.

  Is it possible for two negative charges to attract )y.5socoo.,qyaj.mj7 v8 snu each other?

  Is it possible for a positive and a negative2u1kg j+oic2fkxb - z8 charge to attract each other?

  A glass rod is rubbed(cvc3epauc v/ 0 :eqp1 with a piece of silk. During the process the glass rod acquic3c1ue:(/cp qp0ave vres a positive charge and the silk

  A proton carries a

  The model of the atom shows f;av 3nm (qrdvd:l v/vfl7pg5pt/y wks-0q 98a

  A neutral atom always has t-ocj1; 6g memc5 42eg3dtzzp

  An atom has more electdv-kxm0 w me86qcx/(tyw770x jp c7iprons than protons. The atom is

  Materials in which the electrons are bound very tightly to the nuc)nv k.ohc6/u-jycc) j59qsivb1w tipm:lp6) lei are referred t.owi)p -bpycc6k hi qnm: v/ j)cv)69us tj15lo as

  Materials in which the electronk; 6iyd.uk15 ap+ol /+ua bouks are bound very loosely to the nuclei and can move about freely within the material k5 + ia oy.;bu/ukua6kd+ plo1are referred to as

  A negatively charged rod is brought near one endr:,lr pec1o z9 of an uncharged metal bar. The end of the metal bar farthest from the charged rod w9or,1 lz:rpceill be charged

  Sphere A carries a net positive charge, and sphere B is neut28iyf96m7mzkq q t 8 f;a vsmpus1x6)tral. They are placed near each other on an insulated table. Sphere B is briefly touched with aq )f7smk1y 8qt zvf9u28;itx6ap6 smm wire that is grounded. Which statement is correct?

  How can a negatively0x ele -tu5lw 1ubj)4. jtsvmtf;5e6 x charged rod charge an electroscope positively?

  An originally neutral electroscope) dkwmt3yk) f64tj: rg is briefly touched with a positively charged glaf d4) jm:y63 ttkrkgw)ss rod. The electroscope

  An originally neutral electroscope is grounded b p 0+clfcj g(798-lgrhsk.+zryibck7 riefly while a positively charged glass rod is held near it. After the glass rod is removed, the electk fc8hl7yjribz 9l-spcc0+gk7 +( .grroscope

  A positive object touches ak0wo0oipm 3()m 9gszp neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to the li)ms (3op gmokp009 zweaves?

  A large negatively charged objec7fxoi7l*m2i r( y2,+inmuqc 5b*5ccmj sr2slt is placed on an insulated table. A neutral metallic ball rollss5cm5lmyinf j*i 7 ( cbuo+cmls72i2rqr*x,2 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 coz)n 6run,om6y zk 3jy3nstant $k$, which appears in Coulomb's law?

  Two charged objects ar iw,6srz led96e separated by a distance d. The first charge is larger in magnitudelwzsr 9, 6ei6d than the second charge.

  Sphere A carries a nn-r67t jxn:vqc fc p4.,wi6dzet charge and sphere B is neutral. They are placed near each othei:pc.6-d7vrzqt n6cw , jf4 xnr on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the char2k2 sux:cn6ptu k l/f;sfbd78ljnsj (/u;o,qges on both objects are doubled with no change in separation, the force betweeonls :bjc,n(kf//2 k27uxq ;p udu fs 6jl8t;sn them

  Two charges are separated by a distance d and exert mutual attract1x 16ooqj ;rmsive forces of F on each otherms;r6xojo1 q 1. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract eactza,ax..v 7a8kj ,z fih other with a force F. What 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 ,az7j k8 fa.vzxti .,aone-fourth its original value? The force is now equal to

  An electron and a proton are separated by a diss *eiutc* *qj:tance of 1.0 m. What happens to the magnitude of the force on the proton if a second electr ct*ei*:j*uqson is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. What happens tozajj jum kvzk/k y1b( .:ma*2ibc1p/- the magnitude jbk2-j cayb/ ui/zm(kzvmpkj*a1 .: 1of the 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. What hin:(he wkb-fy )m -cdlrmc(99appens to the size of the force on the proton if the electron is moved 0.5c9(wkd:mn) yrmce9- (bi -hfl0 m closer to the proton?

  A point charge of +Q is placed at the center of a sqk 8-hj fpx:6square. 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 other three corners of the square. What is the magni8jk fq-sxh6:ptude of the net electrostatic force acting on the positive charge at the center of the square?

  A point charge of +Q is placed at thaf3k) ) qhvk ic-ih6; uffmv y*ug8x72e centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, 6v 3ihu8ciqu ;2af)kmgk f* hxvyf)7- 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 other vertices?

  Which of the following is not as5,qxlulryve e /8ew5w2.4xx vector?

  At twice the distance from a point chatqi80kp/ msdf.t:1 czrge, the strength of the electric field

  Is it possible to have a zero electric field values6y -p3s1 mph- bsbpk1iiw)*o between a negative and positive charge along t-61b1*-hbm3ssi iwpy sp op k)he line joining the two charges?

  Is it possible to have a zero elect q:nx11-l xshqfv. oo4ek193q zoi ox3ric field value between two positive charges along the line o3x.oq1h-qo k1qn zoe lxifs13vx49:joining the two charges?

  Electric field lines near psitive point chargej07ce 74fzl: hrw3 ex,nw9m/m dt(f sqs

  The electric field shown*6js r 3cppylxgt .+r9

  Can electric field lines intersect in fro. 3-usowoe5,dy- duo ee space?

  A solid block of metal in electrostatic equilibrium is plac79znqfdux4q9 sp6u.(k :r ,z .xy6el4suzfwved in a uniform electric field. Give a statement concerning the electric field in the block's inter fx u9qup. (x64kqzfuv6nrw,sedzl:74zs9 y. ior.

  If a solid metal sphere and a hollo smex) kx 3c .wrlp.lf:ml29v6w metal sphere of equal diameters are each given the c3sxf6 :9mm)2.lxrv.lpwkel same charge, the electric field (E) midway between the center and the surface is

  A cubic block of alubkq7v: g wm x.x(* dcjb7xhy67minum rests on a wooden table in a region where a uniform electric field is directed straight upward. What can b7kxqhby dx x:.(j7vc* bwg7m6 e said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibriub8,yn +mr g5i;9dj c;i:.wcmcm9vs fsm near an electric charge

  A positive point charge is enclosed in a hollow metallic sphere that-,vfq dnj tox:p929 ya is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow spherx2:9nq - yvdja ,t9fope has

State three properties of con4e/n 3s:xru x, t1shq349l vnwiig6qdductors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is *. ha90sf fdgf$e = -1.6 \times 10^{-19} \; C$. 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 proto7f kixf7f oi52ns than electrons f7 2kii57foxf does this piece of plastic have?

  What is the charge on )acw: ziv d4u*qk-t)y m vv jgwo*91r41 kg of protons?

  An atomic nucleus has a c ozq1y*;ie- md*vodnh4q3 n 9oharge 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 cha kd( 4)dpnq dgwgbxnn e6(15u+rge values of 2.0 and -4.0 mC, respectively. What is the magnituded4n d6g ubw)qn+(g (nxepk5d1 of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between thmmvzd fswmqd3lye 3;,i0 8c:0em is 1.0 N. What is the magnitude of the second chargfv 8cmz0ld ,ws yd: ;qm3mi3e0e?

  Two 1.0-C charges have a force between them of 1.0hkh 4wfv 92zql+.hq y0 N. How far apart are they?

  The force between a 6 qjrdy.5t-ow $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cmdfv9t(h u :y7b apart, experience a 1.0-N force. If they are moved to a new separation of uyb( tv h9f7:d8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the -s z:uc5lhk4v x-axis. The first charge is at the origin, the second to the r z4 lch:5u-vksight at x = 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 cha d1sbal )zl1nt t0vq78g*tx5c, oj3derge 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 d1,gsld 7encv*8 olbtt)5zx13jat0 qof the electrostatic force which acts on the charge at the origin?

  Three point charges are located at y/r60j;j7j0+ty e xz hn svbtd(.x :bpthe 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 mty 7yxxe:;hn(p00 d6jjz/. strb+vb j. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q is placed at the center of a square, and a secojlv j:7wc 3p;nnd 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. Whatnlwj3pvc j;: 7 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 o:u hu(mn4h1 5rr;1l8s cor jy= 5.0 nC is at (0, 0). What is the magnitud;ru(ul 45:s o m1 nrh8jyrhco1e of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC0pp2c viy5ob + is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0).ivy pcbp025 o+ What is the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the zl-/xco(zd p0 vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which a pdxo0(l z-c/zcts on any one of the charges?

  Consider point charges of +1ms1wodk) d( df-a,.a.w nsydz;tnp -Q and +4Q, which are separated 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 force actinpw1m;1wn d.skz d-n-.do(fat ,d) asyg 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. Where o acbxvn2/2bn:n the x-axis can a third charge be placed 2nba:vc/nb 2 xso the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. Wherd0 u0fnj0 1.pouku i:k ughc3wqcx,hw66 60one can a third positive charge +q be placed so that the force on it is zero?uod6ug,f3u 0c:q k knh0i0o60cnx1wh6 j.pu w

  A copper penny has a mass of 3.0 g. A total o:cm-s ,zxpm:i+ l;wl0y.b rdtf $4.0 \times 10^{12} \; electrons$ 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 against5xeljd/ eag0y3l6 *pj l:jxn 2 the force of gravity by the attraction of a fixed proton some distance above it. How50l:yj lx e*j /ajd l6n3pxg2e far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting thrdcoxe3*,:-) cph z l.*(jcmxt1tp y cceads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle between the threads is ct te-cx o z1.pjc,m:lc*c)yp*x3d(h $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magnitude ofd 5 7prz(wbvw(ba-d d5 the electric field at a wr5ap( bv(5 bd-wzd7d distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distance ;:eokk/m nkye;p)o;3( ka m kdof 1.50 m from a 50.0-nC charge?pm;ek3yk; nkkm(a /d k)e:oo;

  A 5.0-C charge is 10 m from a small test charge. What is the:35:snc tjega/p1rp u magnitude of the ele:5gecrut:ps j a/p3n 1ctric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test yb2 wd zq thl7u.;jg0/charge. What is the direction of the electric fiel.l /yqtj;wuz0gd7 bh2d?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o;9-phxe vrlg 0f the force experienced by a 1.0 nC charge plap0xh9lve- ;rg ced at the location of the test charge?

  Two point charges each hhp:l7, * dqdnlave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a poiqdd7 n*pl:h l,nt midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.mz) qld h0a uynx7+t8;0 mC charge is place z lx +muq;7ny0tdah)8d at the 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed*b r,axc9 i i0y 5+g7ukkns0od 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 a line joining the two charges is the electric fiel,oi9k0 g c*ba+sx 75riyu dkn0d zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at xs /x*8nl pjq grof1c12 = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midwayfg*xnj18 or/p c l1s2q between them?

  Three 3.0 mC charges are at the three corners of a square of side 0ee,3 , wkdqacdb631 kw.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.ad3qek kwe13wc,b6,d

  Consider a square which is 1.0 w4:6)vy*(, q:dia0dxq rc1hnxtvarf 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.wx6v:4qy *av 0a nh1fr ,xr(dic t)d:q0 mC at (0, 1). 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 in41n1 azmbz/bv-m7y 0pd :ieet is placed in a uniform electric field. What is the magnitude of va4ipz :m7/n-ydz11bn m 0ebethis electric field?

  A particle with a chavo+x odez 369irge 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 placed in an elecsqc;no9 rk c7bi4+ q)ctric field of 6000 N/C pointing downward. What charge must be placed on the ball for it to beci74nkb)qcr c s 9o;+q suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The ball is placedp+ (nlr1mq4n c;j fqv+9r2kg) fwj (tx inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direct 1 jj(tc ng(q+ qm f4rvfkxl+p9)r2n;wion of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnituuq5qbutll; *)de of the electric field 5.0 cm frq5 ;*lulqb) utom the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge sj2vv;s,4(6a5 yqqgi agt *h tof 3.0 mC. What is the electric avqs* 2yjghitga5ts v(,q;64field 6.0 cm from the center of the sphere?