State the law of conservatm4pmk;v+n j4rm j gr0)ion of electric charge.

  Is it possible for two negative charges di/d-5xfyd ;sto attract each other?

  Is it possible for a positive and a negat5t ;g3dr d)(duqnu8 /evm ;qymive charge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the glass r0cdkwf bx: ug2n74h yiv0s; g*txqw 9(od acquires a positive chargeux0w;tc7sdxygk 0v24qb(f:i h 9g n*w and the silk

  A proton carries a

  The model of the atom sh x:be*, 0daf*x5;ulsp4miz qxows a

  A neutral atom alwayg(:jnm6 8gd dvs has

  An atom has more electrons than proton7h4j- ha2kiky t cn.rsg*/1bt uiqm00s. The atom is

  Materials in which the electrons are bound very tightly to9bf4b i w 7,pf/c7aakfdq/h3r the nuclei are referred to as3 /d b74bcw qff/79apihkr, af

  Materials in which the eldis )0jdh(ts t 5i5x(iectrons are bound very loosely to the nuclei and can move about freely within the material are referred to d(t5 sx dhii5t ji0(s)as

  A negatively charged rod is brought near one end of an unce 2imj 6gjoeedmub+:jb hwla20/ f5; .s5m5o xharged metal bar. The end of the metal bar farthes e mbeo/5lsd h0 6giaume;j.jxb+w5f5 o: 2jm2t from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral. They arn; *kk-:cbeiycqp8j c h8er08e placed near each other on an ins-:cp b 8ci8kyjcrq he8k;*n e0ulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electrosl o wpc/q0y( eqepo8*bs9k*u 1cope positively?

  An originally neutral electroscope is briefly touched with a positively cuv cph( n:cp++harged glass r+pcc u(:v np+hod. The electroscope

  An originally neutral electroscope is grounded briefly while a positively chtmoxtqx9+ .33rz( n ilarged glass rod is held near it. After the glx( q33t.inoz9tmx + rlass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the leaves separate. Twxcc79 fu)o je81*v-bua l5yfzre *1then a negative object is broughl*et1ef z7-x *w)8youcc5urj b1a 9vft 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 neuw,w9 gus6m4 vdtral 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, butdsmw9v gw64u, 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 th3l s*f2gz*5 kf28fz hwf;xubp qs:3dx e Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are sep7lw2uwpan0n -arated by a distance d. The first charge is larger in magnnaupwwl02n -7 itude than the second charge.

  Sphere A carries a net charge and sp j(y 4lhe3cf0eb0hbt29qn r :phere B is neutral. They are placed near each other on an insulated table. Which j2ptq 30 nb f4eh(lyrceh9 b0:statement best describes the electrostatic force between them?

  Two charged objects ata y1v/n/e oow4tract each other with a certain force. If the charges on both objects are doubled with no change in separation, the force betweev1/wna4 /yooe n them

  Two charges are separated by a distance d and ko9ms x1- qcfht1i;d7 exert mutual attractive forces of F on each other. If the charges are sepskt1 qm9fo1dc7xhi- ;arated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract-7 e9k+xhf73j klknsw each other with a force F. What happens to the force between them if one charge is doubled7sn -kl 3+7kefjwxkh9, the other 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 l3- bfue;vtg*+le:df 7 jv,p4riz7r a1.0 m. What happens to the magnitude of the force on the proton if a second electron is placed next tzlv,-+ 7ljpu 7*rf rg: vtbi43ea; fedo the first electron?

  An electron and a proq t6d1z1ojd keciz- *w2wj,ugdj87.i ton are separated by a distance of 1.0 m. What happens to the magnitude of the 8z gk-d,d71 .jqw cwj21*uj6idteizoforce 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 77h;cao iza:z m. What happens to the size of the force on the proton if the electron is mov77oa : zi;cazhed 0.50 m closer to the proton?

  A point charge of +Q is placed at the center ofj/ :9.m.d :*fjsh*oo j9(iztcd9mxj b5 j vulp a square. When a second point charge of -Q is placed at one of the square's corners, it is observed that an electrostatth5mj jjvo.jp(:9uld9s j f /zb*.9ci *x:domic 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 plgujwjf7o+k3 ; vaz*, maced at the 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.j ,mav3+ j*u7g kfwz;o 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 b ky gj8qrxphg+4v;1*)vg b t)is not a vector?

  At twice the distance from a point chy0gq/ff 7l irz69a c(rarge, the strength of the electric field

  Is it possible to have a zero electric field value bp+g+akj wt e8/ql3 7sm3 n 9.yjirss1ketween a negative and positive charge along the line joiniy k tjrn/q km1+e s.37gpj3+lsaw9s8ing the two charges?

  Is it possible to have a zero electric field value between two positive chargesl)es- b4- qc.l i hw08kcmbao7 along the line joinl .mwo0bk q is-h48a cblc)-e7ing the two charges?

  Electric field lines near psitive point cn 9 *mo9xex 0oaj1tc)jharges

  The electric field shmg ./cs ddm9d-ggr 8)yown

  Can electric field lines intersect in 3: ao+aw7mzi1 b)ytppfree space?

  A solid block of metal in electrostatic xwq(h-,v2e dbd ;x2ue 5q) hbsequilibrium is placed in a uniform electric field. Give a statement concerning the electric field iq 2-)u(ebqhs h2b5,e; dwxvxdn the block's interior.

  If a solid metal sphwzd /cj2 tt1ef ugz.1,ere and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between thej g/wz1tecfz t.,du 12 center and the surface is

  A cubic block of aluminum rests on a wooden table i6 d wci k*kmy)i+9dlh+6sd xx-n a region where a uniform electric field is directed straight upwad-9* dkck)wx6y+xs6hi i+dmlrd. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrm ,*9- hh6xxel0dnlbqostatic equilibrium near an electric charge

  A positive point charge is enclosed in a hollow metalliy md8x ,8dsna:3ij wo um 9r43t0uxxc*c sphere that is grounded. As compared to the case without the hollow sphere, the electricc0 jyxix,* m4u smd9 wx3d8on8uatr :3 field at a point directly above the hollow sphere has

State three properties of cu8jxug)1 -fin onductors in static equilibrium.

State Gauss's law.

  The charge carried by one electr4*suy(r.e4v g 2c djxaon 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 cb f)ine+ 2f7qymbx/* uharge of +2.00 mC. How many more protons than electrons does this piece of plastic 7*f2)min/qeb+ u yf xbhave?

  What is the charge onl/ju6s1lu 8)jeax,c q 1 kg of protons?

  An atomic nucleus has a charge of b )j2.w aue1lw$+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated by kac,h/k-ay z.9f6 u j(s w +vbbh.p4vk1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is tfkhbp(,y6+-. 4 9kj. cavvwhbzkasu /he magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between ;u+3* bwc s:tl,thmlnthem is 1.0 N. Whanmb:t wt 3llc+hs;u,*t is the magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are the,s(1eyq 1mnq vy?

  The force between a 5rvnx.ey+r jzum x21* $30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm ap)s 3/uvh.6cb50mb a bm -nlgehart, experience a 1.0-N force. If they are moved to a new separation of 8.0 cm, what -mbm a.gh6b5 0)hl3/nbvuce sis the electric force between them?

  Three identical point charges soi(bh +ebg vuyasr:1691h2ixha5 k; of 2.0 mC are placed on the x-axis. The first charge is at the origin, the second to the ri r1h;byhebi2x+96 su(igas1h :vk5aoght 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 charx8t,emc/ h x1age 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 electrostatic force whta x8ch/ m1e,xich acts on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mC a2 0t7oa, zylgat x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 ola,0y72t zgamC 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 of )j /ufbcetv;1n5g wy8a 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 charge of -Q is plaw5 u)/v8bjn 1ytgf; ceced at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is r ep+a 2)i4wvq0td ;fdat (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of th) vrwif ept;+42ddaq 0e net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m,vn b ldx4qk:45 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction :4vdb qkl x5n4of the net force on the 5.0 nC charge?

  Three identical charges :sc+ c svb8y0zof 3.0 mC are placed at the vertices of an equilateral triangle w8c0 ssyz +bc:vhich 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, whil .oed yhww z1j7s+h4ts2 +y)ych are separated by 3.0 m. At what point, on a line )djw7eyw 2lo+zty h41+yss .h 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 9kwocdo*l.q2:y y ,vca +9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net fooq lcykc,dy :wov.92* rce on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a.vgk),vk lrwj-gn5w 91 93xdowa+q1 zc Where can a third positive charge +q be placed so that the force on it ikkr ,9w+ v qx) z5g1cw wn39d1-olavgjs zero?

  A copper penny has a massk26- q(ld ohcy of 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 fopa;e/4p.ycof rce of gravity by the attraction of a fixed proton some distance above it. How far above the electron is the protoneo /c.;p yp4fa?

  Two 0.20-g metal spheres are hung from a common point,igvj4jk/ gkp-*(a fz by nonconducting threads which are 30 cm long. Bothv f/a zgk*k(-ijgp, j4 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 t2a/2 sw fenn: m/9md 8tiwk4 s2uzfs8ihe magnitude of the electric field at a distance of 1.0 m 2 8s24fi2wm 8a/sfw/ei9sumtzn k :dnfrom the nucleus?

  What are the magnitude and direction of the electric field a )y/leu;sj4sx.bo o 5ct a distance of 1.50 m from a 50cjbo o xy;. sluse)4/5.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o1n7(rutfhw n o+9ra8tcf 8f9 pf the electric fi7 f1r(uf9c rotf8ah+ n 8wtp9neld at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the directiona( dgn y1c9 -xwldqae9l(n f:gc -o6f/ of the electric fieldcwlna (9(x deg nl1o/ 6f9gd--fqcy:a ?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitud x dc tbq7zi0i3td./(z(+ac,jcda;x oe of the force ext3 ;/ x(oi(q,a 7zxzad ddct0jib+.ccperienced by a 1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 *kmrbtmat5fz 2wt;- 4C and are separated by a distance of 4.0 m. What is the electric field at a poita z2rkbtfmm;- 5t*4wnt midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of w ky2ug tqr-x,,se ,6ta meter stick and a -4.0 mC charge wytkr-t u, ,q x2s,e6gis 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 mark of a meter stick and a -4.0 mgr*d vyec5+ci/igjn+8 -w kp6C charge is placed at the 50 cm mark. At what point on a line joining the twoe6dn- 5rp* ki/v+j cg+i8ycwg charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.205fk +*6y +g nl+xu.xjujalx. w m. What is the magnitude of the electriclxauw y*+jngf.k5lx x +ju.6+ field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square e+:vamfpn e 7i2fo.zft 9 n6k2of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the center of the square.6e.:+zpvn9e fnfi2o f 2ka7 mt

  Consider a square which is 1.0 m on a side. Cjzob: g,d l1g;bym5-h harges 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, 0hm:g z,5bbyojlg-d1;); -3.0 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 wh j jsu0w4p,-vcen it is placed in a uniform electric fieldu-0cj 4svw,p j. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a massk*cj 0qfb sqe 3znuu3x2nw;s*.x( jw6 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 0s fb0z8nhz s 8mh*qnp4w:+c9c .120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ba 8w09m cnf hsz4hbpn:*8s qcz+ll for it to be suspended?

  A foam ball of mass 0.150 g carries a cha2n2d/za o mu:5o7rrs jrge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of grarzod57 o:/um2jn 2ars vity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a ch2cksaz oa*1e +d6a*o zarge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sph2zs k* +a6* odeaao1czere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. qqiz b4kzn0bhuv:8j ):)kp o ,What is the electric field 6.0 cm from the center :pk)8inbo4hb zjuz:k v) qq0,of the sphere?