State the law of conservation of electric +0*ldm q pe9bq s+ l0b8nh2ivecharge.

  Is it possible for two negative charg *l kie;fhwme,)d: /*q /stkt 2wv5mdfes to attract each other?

  Is it possible for a positive and a negative chaj pwm)rq w7n tqfd08+-rge to attract each other?

  A glass rod is rubbed with a piece ofqbxr zga 3 7r9z1y t*k91gkf7f silk. During the process the glass rod acquires a positive charge ar93fyzk zk7bxta*g1fqg17 9r nd the silk

  A proton carries a

  The model of the atom shows *r hs p)jf/cl+k6 1vtua

  A neutral atom always hk 7 peh65ja-.9wm lriras

  An atom has more electrons than protons. The atom i bpozftf 97y: )c-:wuqctj(w9s

  Materials in which the electrons are bound very tightly to the nuclei are refo8: 942pu8by8,n gf 6x p5cmrxrwcg ckerr :x,2 g4ccp yrfgc98upbrm6 8koxnw8 5ed to as

  Materials in which the electrons are bound very loosely to the nuclei a c*k *k4p e(pzp2ieqh- jb 35o3ml9rgynd can move about freely within the material are referred to as3* c49miolkbg2qp-5re zp*3yp jhe k(

  A negatively charged rod is brought near one e4p)9 )rg6iy)voqm yebnd of an uncharged metal bar. The en 6)vp)yy)r eo4mbqg9i d of the metal bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is neutral.uhdfm* 6au-t7 jcp7 8y They are placed nea7hd7jc8 u*mtu a fp6y-r each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively chargedn:iv25tq+d v z o;d8cx rod charge an electroscope positively?

  An originally neutral electroscope is briefly touched with a posith31lm+i jn69*g *d yoc6jcfemively charged glass 9y*id 6cm*o1c3lgjf hmj6+e n rod. The electroscope

  An originally neutral electroscope is grounded brie*7:nephq92kf q yj q9xfly while a positively charged glass rod is held near it. After the glass rod is removed, thekj979 f*p:2qxqqye hn electroscope

  A positive object touches a neutral electroscope, andia*f)a6s oj ,t the leaves separate. Then a negative object is brought near the electroscope, but does ntoa6sa*,) ji fot touch it. What happens to the leaves?

  A large negatively charged object is plac5 a4ggr ry4es/ed on an 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 rolls forwa/5are4gyr4s g rd, 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 v+7y (2jffe2 y ;ww:ax:qbbj fCoulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a d.2nedt.irq zgc+s)-lx lj7 s 5istance d. The first charge is larger in magnitude than the seconddg5- +27qrsjnzsel)i.cx .l t charge.

  Sphere A carries a net charge and sphere B is neutral. ga/in4x. : tp2u.jd )m up2indThey are placed near each other on an insulated t g2ux)n/4pt dupi dian:..m2 jable. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with p ,u2m mxk3hnc2ed 4:ya certain force. If the charges on both objects are doubled with no change:k2dcex mnpm yuh423, in separation, the force between them

  Two charges are separated by a distance d and exert mutual attractive etbw+9pgc-c)m-f:/ xqau g( ,d6mrnp forces of F on each other. If the charges are separated by a distance of m,wq-dc6+pngf(-umxa)/ecg :p b 9t rd/3, what are the new mutual forces?

  Two charged objects attract each other with a force F. What happento.w d2lgs t6;s to the force between them if one charge is doubled, the other charge is triploldg wt26 ;t.sed, 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 happens to 3 s;o 1cunozx-the magnitude of the force on the proton if a second oos;cn3z-x 1u electron is placed next to the first electron?

  An electron and a proton are separated by a jtg ak)q3luyn1bqe6 y- 3d,.k distance of 1.0 m. What happens to the magnitude of the foratue6l.y,1k n3d3yqkjg)-b qce on the first electron if a second electron is placed next to the proton?

  An electron and a proton are separated bya )g9glzv/u1 y a distance of 1.0 m. What happens to the size 1vg/lza y9ug) of the force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is48 qf29s cfuzg placed at 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 of -Q are placed at the other three corners of the 8 sq2uz4ff9gcsquare. 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 equilateral 3 37vbouar:co*njf m1:jeqj. triangle. When a second charge of +Q is placed at one of the triangle's verjrof1qv3.:njo emajc *b3u 7:tices, 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 a vw2ed z3k m)v;emd0dw, ector?

  At twice the distance from a point charge, the strength of the electric fibv1u3zlbl * )ield

  Is it possible to have a zero electric field value wwkdh7uwb) r:c16z g*v4ei3s between a negative and positive charge along the line jvw:)3 h41rbzk u cw*w6 idesg7oining the two charges?

  Is it possible to have a zero electric fie,rnc n+kph/3ui ey v67ld value between two positive charges along the line joining the , y cv +3/piun67nrhketwo charges?

  Electric field lines near psitive poin59j3 2kfng+sw,msmjhlo .: 7mvz.l lwt charges

  The electric field shownpwabn lapf: t;*f+( z.n-b s(cwt c:j4

  Can electric field lines intersec 9xsm43 zx;0tqwa 7mnjt in free space?

  A solid block of metal in electrostatic equilibrium is placed in a unifv u/5t/1 ytnggasa-v-orm electric field. Give a statement concerning the electric field in the block's interitau-vgy 1vgnt-a s //5or.

  If a solid metal sphere and a holl .s ;su9gfp icjfc7:*kow metal sphere of equal diameters are each given the same charge, the elccj7:skf gsu .fi p9;*ectric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden table in a region where a unizc rw; ldzu6m8f7s39a form electric field is directed straight upward. What can be said concerning the cazmd3 uclrw7z9 6f;s8 harge on the block's top surface?

  If a conductor is in electrostatic equilibrium neroyt8ban t 080ii9 n4par an electric charge

  A positive point charge is enclosed hrvd j;gdk,gy12 642fg r/ivx in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the ki 2 2,vd1h/ ;v rrgjy4g6dgxfhollow sphere has

State three properti z7e m+ockq.o/es of conductors in static equilibrium.

State Gauss's law.

  The charge carried by one elecr,gwnqwzch k;/sy, 80tron 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 poxc/a696 7ps;h:c z7l2a sj dixi3xwmC. How many more protons than electrons doexi 9/6zp7d x;x3ilsp 26h c:aj7csaw os this piece of plastic have?

  What is the charge on 1 kg 8zuerc1ez l u;2+es9cof protons?

  An atomic nucleus has a charge g)o-lmbhoyu /ewv * ;-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 charge valqc7n( kdi1 3xsues of 2.0 and -4.0 mC, respectivnx1i7 (dq3 kcsely. 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 b6)fa q5-b;)ihcnx e ecetween them is 1.0 N. Whate acf5c)6xneqb h-i;) 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 thezy1:fz ul0hqejy*,i - y?

  The force between a ifz-v1:u31hmz a y4yj.e;k nh$30 \; mC$ 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 fo*zyn ,c25p) byyb;m o(9zfv jmrce. If they are moved to a new separation of 8.0 cm, what*fm5yj yvczm2bon pz )b(9y,; is the electric force between them?

  Three identical poin5u26g.caft qx(h e+j*gsl +fu t charges of 2.0 mC are placed 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 which acts on the chg52 *6cxj+utaqufe+ . gfhl( sarge at the origin?

  Three point charges are place;fe e/;ag smrj;hkh +wkscd51su2-8l d on 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 electrostatic force which asjr8;h/s;f2a e1cks5wul;m+-g keh dcts on the charge at the origin?

  Three point charges are located at the following pouat *b(lxgu/+.o(qg8ht 5hss sitions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = -1.00 m.g/gh8a tuqx 5ls+h o*(.st( ub 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,hfoh 6 0,0zgkea b4euz2)v f)r 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,0bf eku0 z) of6h)r2g4hzeva of -Q is placed at the lower-left corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is 0jau)x2*lg+ 1n(i v bp)hi)ai g4wdthat (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). Whg1(i+)jba2xlp 0h))n i a hwigdv4tu* at is the magnitude 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, 0.1vw0 4u j jz+* y,lnp+jl 27uieized8e00 m); Q3 = 5.0 nC is at (0, 0). What iejdnl +j*+ i2u iwe e0z7zp vjl04y,u8s the direction of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilateral;a*ur9)x,dnq lfba .od ro) .z triangle which measures 30 cm on a side. What is the magnitude of the electrostatic rqfab) 9ox;)* u.dl.odn z ra,force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, wh+6 a)q6peo/5p*aq;dpr qk pu8b jf 5uoich 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 actp b*/+u)jap58ap6pq;qkofq u6d5oer ing on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at xd8 y)wrx5 x j uqr)93+q. .wy1remsihs = 4.0 m. Where on the x-axis can a u91myq). s3d eh. w5xrjxy+) wsir8r qthird charge be placed so the net force on it is zero?

  Charge +2q is placed at the oricxk;f7x*/ki.f7yvy r f5el4y gin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on it is ze/r 5l7y*kk.y if;7fx ecfxv4y ro?

  A copper penny has a0brg q1j1op,n mass 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 force of gravity by the attrac *vjb1trf4s+5y2cuf ation of a fixed prot15ucjf r *yts4b2vf+aon some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconducting th(dmlu lr4jzk7( ,p82 lv:inb8a v,nohreads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces a hzi7dlpnu2lr (:b(8 omlk4 8,vjn v,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 the magnitude of the electrij csbno-( jur.ro0x/-cc4:x yc fie-u4c rc j-/cbsro.xojy:xn(0ld at a distance of 1.0 m from the nucleus?

  What are the magnitude and direction 4hd8-z vtxkmi kef 212of the electric field at a distance of 1.50 m from a 50.e zd4 k2f-t vh28xkim10-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude oq d00cwsrco//f the elect/ w0q /cs0rcdoric field at the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the direction of thermo3ha 4m;a7n h.a o:p electric fi4:nha; 3p. a 7ormmhoaeld?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitudetk*t5a:pm5yh 4g 4 claa.3tyq of the force experienced by a 1.0 nC charge placed at the location yl.*ah4map5 t4qk5 a:t3y g tcof the test charge?

  Two point charges each have a value of 3.0 C and arem k u kk(j gylhabt696:0w ;nvnc219yi separated by a distance of 4. 6ny0 nji6vab:glw hmt(kkk1c29;u9y 0 m. What is the electric field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a mete7h ho371cf ppaitr k 9vti1;:7 pq.cehr stick and a -4.0 mC charge is placed at the 50 c77 tci f1pt9 ra7hh k.c;o h3e1:qvippm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed atc1z5fllwhtk ++2rj p9 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 chw zlh+rc 9j2t5+pfl k1arges is the electric field zero?

  Two point charges of +3.0 mC a h,c3jdk 6rbbpi22zq3nd -7.0 mC are placed at x = 0 and x = 0.20 m. What isrz i6jk bq23p2hcd3b, the magnitude of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a square0+xgkw09z.f pl -hlzp of side 0.50 m. The last cornerzg lz0 w-+k.x0lf p9ph is 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 on a s-tpiubg,3h6wwofq+ ( ide. 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 electruo(g +qw3bfht w6p i-,ic field at the square's center?

  A force of 10 N acts on a charge 0t1 seg/ zijr,of 5.0 mC when it is placed in a uniform electric field. What is the magnitude of this electri,1 gjr s0/tzeic field?

  A particle with a charge of 4.0 mC has a mass oqctx*6tvrg- aoz+y u) (bvnl47* oe x2f $5.0 \times 10^{-3} \; kg$. 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 uz q zs,;)i,av*tz a0ln2y+sy of 6000 N/C pointing downa*2yvl+zi;z)ss z, unq,0y a tward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a charge of 8yc/ogxdcna974v )mv *tm pv8-2.00 nC. The ball is placed inside a uniform electric field, and is suspended against the48t cmvv dy/gp*m7o9nx)a c8v force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries s .*tmy aw5i.wa charge of +2.0 mC. What is the magnitude of the elecswmt.y 5.i*awtric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 pjje0lnk/ +g. mC. What is the electric field 6.nj.j /gkpl e0+0 cm from the center of the sphere?