State the law of conservatiofha 9 62uob g1z(dk;uan of electric charge.

  Is it possible for two negative charges to ao7t+pum cib4s40k t; pttract each other?

  Is it possible for a positive and a negative charge to attract each o xd rjp(0gp7z-ther?

  A glass rod is rubbed with a piece of silk. During the p9ajy)x ,u(ruhap9 7 ffrocess the glass rod acquia,)(ruh9p juff79xy a res a positive charge and the silk

  A proton carries a

  The model of the atom showsd2bu -yqvvqg,ytl(*0 j s- 6hyw-uab2 a

  A neutral atom always hassgn0m(v qpy l mpnni/ 3l+01o.

  An atom has more electrons than protons. The atom-nw( sf 44 on-yz87qc vgc0upb is

  Materials in which the electrons are bound very tightlhd v92 m5k)xmmy to the nuclei are referrmmxh)29k 5mv ded to as

  Materials in which the electrons are bound very l :vfjy3zezc,xpr*b .z ++h)nkoosely to the nuclei and can move about freely within the material are referred tozzckx rb3+)jvnp:f* y,.+h ze as

  A negatively charged rod is brouxu 8e4+muj bp7xl4vq6eh5: azght near one end of an uncharged metal bar. The end of the metal bar farthest from the charged ro46 qb em:vja+lxe5 4uuh8pz x7d will be charged

  Sphere A carries a net positive charge, ryo* zzjs-gjqw8f9 slm45e5 2 and sphere B is neutral. They are placed near each other on an insulated table. Sphere B issg5 f*zr84wsej5m ql-zy 9o 2j briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope pos( pecnp l36sw6h/9 jyqitively?

  An originally neutral electroscope is briefxgr0p, rhtrz(3*yo 8a ly touched with a positively charged glass rod. r*r3z8g(,yap0ho xr tThe electroscope

  An originally neutral electroscope is grounded briefly while a positively o3/jhuv)zbq5sg9 i, xcharged glass rod is held nev3qis ,jh o9xb/g) uz5ar it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electqqdo(9p 1/.i sxw9kzk roscope, and the leaves separate. Then a negative object is brought near the electi(qp/z9. skd okq9 w1xroscope, but does not touch it. What happens to the leaves?

  A large negatively charged object is placed on an insulated table.ei-(sfdhn)(d*cy x m. 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, but does not touch the negative object. At no time does either ball touch the negative object. c -(d) ifmxy(s.hde*nWhat is the final charge on each ball?

  Charge is

  What are the units of the Coulomb constan+j;kawdhs+ 6v e 9u+zwt $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distum5nsa5 nz5+g vqsq:5ance d. The first charge is larger iq qz5u m: s5n55+nvagsn magnitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are9:ssfim*8 by bd b9m,bznggrb5y *8n( placed near each other on an insulated table. Which statement best describes the electrostatic force frbgb*,n8gd9yi(5: *b9zss8 bmny mb between them?

  Two charged objects attract each,ub gdi-(4pv2 axe)++nlqy , ga8 nrhr other with a certain force. If the charges on both objects are do+enivyxarpbgl 4 2 ,+(qr-d,ngahu8 )ubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attract lh7+ck44wdi,a2sik i ive forces of F on each other. If the charges are separated by a distancei+4hk, dis2il4cw7ak of d/3, what are the new mutual forces?

  Two charged objects attract each other with a force F 0yc7jv(k69b m r;soyoboma-+. What happens to the force between them if one charge (j7oo v 0ab;yrybkm6ocsm9-+ is doubled, 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 1.0 m. What hapvt,9dy p1xr1+m o/s nppens to the magnitude of the force on the proton if a second electron is plac r,oyp p1t1ds v/xnm9+ed next to the first electron?

  An electron and a proton are separated by a 6f8f,iv1utk +bdkq 9bdistance of 1.0 m. What happens to the magnitude of the force on the first electronv+ f8u9qb,6tfd i1bkk if a second electron is placed next to the proton?

  An electron and a proton are sepamt(korc 6 /gl,rated by a distance of 1.0 m. What happens to the size of the force on tmgo6, tcl /k(rhe proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at-hus foai)6be b)bv 4k+fizspvo395 + the 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 ofpu6bfhk v) ai sbbf3 )z+5eio v+o9s4- -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 p27f;dlg6crm ar 35ww qwo)i80 kxpy*placed at the centroid of an equilateral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an electro r635wwp8f k2g l mpw*doqc7yx)0;aristatic 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 io6r mq)cx -sg/s not a vector?

  At twice the distance from a point char 2wo2bicek+.g,r:a+sohh q l-). hqo bge, the strength of the electric field

  Is it possible to have,9nf+ )vgrbr a a zero electric field value between a negative and positive charge along the line joining the r,anb)vfgr +9 two charges?

  Is it possible to have a zero electric field valuj(usu zs+(*ld beq44us r(d v0yc5wn(e between two positive charges along the line joining the two charges?(wv4q5 (0lsdcnu (* dujs+(zy be4usr

  Electric field lines n(w j up,3zeu:gear psitive point charges

  The electric field s f4gxx5e qt2k;hown

  Can electric field lines intersect in free sp3,h xtev ku7j:wd 5+vuace?

  A solid block of metal in electrostaticr wxgx,100p ph equilibrium is placed in a uniform electric field. Give a statement cxrh,0p0x w1 pgoncerning the electric field in the block's interior.

  If a solid metal sphere and a ho- hhca dd 4o+yh1+v gdtit,4*ullow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the ug*at,4 c- +v1hoi+y dddhh4t center and the surface is

  A cubic block of aluminum rests on a wooden tabph h,u7he4 g qnht59z5le in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the,59t z hng5pqh47uhh e block's top surface?

  If a conductor is in electrostatic equi 5kxefog 2ot1gv(vl g+mex)94librium near an electric charge

  A positive point charge is enclosed in a hollow metallic sphl/ *5ez,.o1am 2jbwh de;e cgjere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly abova2j/e.mje oz hwdc* 1g,b5l e;e the hollow sphere has

State three properties of conductors in static equilibh e)93wkyxvrtq- 0 ;borium.

State Gauss's law.

  The charge carried by o vh2mp5bzk:)sne electron 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 protons than vid40gzf6l5( ppa m;belectrons does this piece of pla5l fpmb(g4 d;zai pv06stic have?

  What is the charge on 1 asu,-v y1vzhl(9 gc:3dr) vlskg of protons?

  An atomic nucleus haswa sohp0l 995 6y97pbrvo 5 cpys-sw1j 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 cm, have chargsof29dc i:jg6 e values of 2.0 and -4.0 mC, respectively. What is the2s9ifo j6gd c: magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them 5k ro5si:m4z i2wn/: we v(4vrcnum(qis 1.0 N. What is trv q(z:kms5( :rm 4w i/ uewcv2nno54ihe magnitude of the second charge?

  Two 1.0-C charges have a force between them of 1)8cy-t skzlx7,yqp 7opg7kr6 .0 N. How far apart are they?

  The force between a oracl;h 73gffz8 q 7p.$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2o1s enjp t+m/5.0 cm apart, experience a 1.0-N force. If they are moved to a new separationmn /+5tpso1e j of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. :/+wgez qeqm ia; t8t8 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 which acts on the charge at the oritzq 8i w+gma:e/ t8qe;gin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placeu hbh l0*yl nej*8g8h0d at the origin, -2.0 m C to the right at x = 50 cm, and +4.0 0nlj8hu gl* b0y8h eh*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 fol.de +5bcwg,0mdfheb9 lowing positions: Q1 = 2.00 mC at x = 1.00 mbwee+,gdfc m0b5 h.9 d; Q2 = 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 com::y:8el eo zgt gb ,jbk-77renter 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 third charge of -Q is placed at the lower-left corneo:7e,- k:bretl 78j :z mgyobgr?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC i sr- 2bleod)+d ji/*tes at (0, 0). What is the ma/+)d rde lt -o*bije2sgnitude 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, 0.10 m); Q3 = 5.0 nC is atfdppf9k6 lc)9 (0, 0). What is the direction of )96 cpk9d fplfthe net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at,yp;i , f1hx1w bw.bgwt e+bl w.5x:nl the vertices of an equilateral triangle which measures 30 cm on a side. xby: xhwi tn1f.1lww;bpe 5w,,b.gl+ What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q andn 1e 2tlwwmr/)dc50z lwo)gs* +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 -1 en)2owswl /r0z)*l5mdwg ctQ such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-Cr7.9r l rp( cv2nqdmy:z4r e*h charge is at x = 4.0 m. Where on the x-a*r9qmdpn.2 v4r hcr: ryezl7(xis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the orii-mn53 yy *k6sj ioo1qgin and charge -q is placed at x = 2a. Where can a third positive charge +q be plo6 mk3-n1q5soi yyi* jaced so that the force on it is zero?

  A copper penny has a mass of 3.0 g. esfaf 25 u)t8:gdi :f(i(smmeA 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 gravjqa l99mm0p27wqp: jj 5*vcj qity by the attraction of a fixed proton some distance v7qjlqcj 95ja2*0:p m wqm9pj above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung ffd :va1s -o7rk 8pppg1rom a common point by nonconducting threads which are 30 cm long. Both are given s 1of- 7pg1dra:8pkvpidentical 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 igwag /a5 7l/wldk xbs8,:sk k/s the magnitude of the electric field at g5,wba:/wsl7ld/kxs k /kga8a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric k.n(oedwnq:g- wviz*r +h 0j+ field at a distance of 1.50 m f:j(nw+ngkw *h0d+ o iq-evr.z rom a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o: m :ee- yj5:,5x0ecvrfgen rof the electric field at the locativ -c:oe 5,j:f5gyxre 0r:emneon of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the *bale lwv (de78.iz+xdirection of the electraw *lvx i(8bzde+l7e.ic field?

  A 5.0-C charge is 10 m from a small test charge. What is the mag)7bvsylk / +t0pn7az 5jzcz g+nitude of the force experienced by a + tgvz0)zcsn7y 5z7 +p /lkajb1.0 nC charge placed at the location of the test charge?

  Two point charges each have a value of 3.0 C and puwtod0567bk 2a gyg2are separated by a distance of 4.0 m. What is the electric field at a point midwk 5you26 a70ggbdw2 ptay between the two charges?

  A 5.0-mC charge is placed at the 0 cmf :xl6h0 59/hgezu mvu mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at th:ezh fhluu9 gv5/mx06e 30 cm mark?

  A 5.0-mC charge is placed at the 0 cm mark of a m,l.oxd5a* q gd;o jw6u 19pf0) +tzssiybbx8 deter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point on .dboajo816;zdxsx, w q0i9 *dy+usfbg)5tpla line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.i;un*hic 7mpo*ki - 3f0 mC are placed at x = 0 and x = 0.20 m. What is the magn i i7k*uop3n-ih* ;fcmitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corneruwl))c6c f08 nt6u vpcs of a square of side 0.50 m. The last corner is occupied by a -3.0cv 6))u8ufn 60ctl wpc mC charge. Find the electric field at the center of the square.

  Consider a square which is 1.0 m on a side. Cha yy.p9oah, wd2rges 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 aa ,9hd wpoy.2yt (0, 1). What is the magnitude of the electric field at the square's center?

  A force of 10 N acts on a cg5ai0u: r;jx0q- y uqsharge of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of thq;a 0sj:-u0rqx5gy iuis electric field?

  A particle with a charge of 4.ia. (-m7n tm,k-ewb 8ht/sdoa0 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 electric field of 600ygqt-.+j dk9 u0 N/C pointing downward. What charge must be placed onu+ jtg9k.q-dy the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a cpw2 6 x4.mfveiharge of -2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direct6p.42vweifm xion of the electric field?

  A metal sphere of radius 10 cm carries.j; 6ettd mn06ewrf m* a charge of +2.0 mC. What is the magnitude of ewjmt t60rmn; .6* efdthe electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0zacgw-.2t .y e cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the centerey.a w. -g2tcz of the sphere?