State the law of conservation of electric charg sozxtc -ack.7e5p (.ie.

  Is it possible for two negative charges to a 8i gpeykk/5 3xf+8hlsttract each other?

  Is it possible for a positive and a negative chal w+g el-yg ;da.bpx4+s(ya e;rge to attract each other?

  A glass rod is rubbed with a piece of silk. During the process the g,h dr9x iz:143 pbm po4ldrfj+lass rod acquires a positive charge d+o3ml9bzi4 :r,df xh p rj1p4and the silk

  A proton carries a

  The model of the atom showvd7o kdsw 4;587amlkas a

  A neutral atom always 2;t(dh, kesgk 8iqsaot8f3p2has

  An atom has more ele6-r ki4h ecstiiw38k-ctrons than protons. The atom is

  Materials in which the 10mc3lkv h7gb h gr6 je,)pg:jelectrons are bound very tightly to the nuclei are referre:,j1r 3hvchg ) mg 0g7kp6jlebd to as

  Materials in which the;kuf1ajq-pn bf/it8 bok5zgu7; + 5td electrons are bound very loosely to the nuclei and can move agat/ -do+; 75nziufj b8t1ku 5f; pkqbbout freely within the material are referred to as

  A negatively charged rod is brought near one end of angwbbbkr p +3l-* 9/gze uncharged metal bar. The end of the metal bar farbbkb9 e-gzw/ 3*gl+pr thest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is jj1m-qm 63pcvneutral. They are placed near each other on an ins13-6 mjcpvmj qulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electroscope pfcccc4, r 2kb7ositively?

  An originally neutral electroscope is briefly touched with a positively chargex /wwe1qygaq/adzqu (;el g:-.v9 )a nd glass r(/yva eud./qe: a)w gwn;9z-gq1qaxl od. The electroscope

  An originally neutral electroscope is grounded briefly while a p;/c +o)y1mamp xy;yt vositively charged glass rod is hel;y /ctp;xavy +myo1 )md near it. After the glass rod is removed, the electroscope

  A positive object touches a neutral electroscope, and the lez0lv)fn /2l ag -t8geyaves separate. Then a negativ -v2lg) tn80lfz/e yage object is brought 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 neutcp/;k2ida,b 8evo r)l ral 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 ki; )epdoa2clb ,/v8r, 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 ofd*jq fmp,v 3w,,7vm5grfunlb5 mo3 e7 the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are ser+9+37g9 e atuusaiheparated by a distance d. The first charge is larger in magnitude than the 9ra u+ 9g3i7 ue+ehstasecond charge.

  Sphere A carries a nevv1dcqw5u:o)ms m: k.0sqc :it charge and sphere B is neutral. They are placed near each other on an insulated table. Which stw1qs qsm0mi)ckc:vou:5 d:. vatement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If the charges oqi0ora+ zt ,e*n both objects are doubled with no change in separation, the forizreq0 *,o+at ce between them

  Two charges are separated by a distance d and exert mutual a pj 7 mhb9l;ub,b4-gbira e23ottractive forces of F on each other. If the charges are separated by a distance of d/3, what are the new mib73 e4b,oph;9j- l r ub2magbutual forces?

  Two charged objects attract each other with 49dm1y vjin )*o4rwmd ,od n8pa 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 one-fourth its original value? Tpyr91nj 4w 8dd )o* vo,d4nmmihe force is now equal to

  An electron and a proton are separated by a distance of 1.0 m. What happens t fkt6 yrye/ju9i43z4jdq.f *r o the mageurkyf*9yi jt r3 qj4f/.d46znitude of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a distance of 1.0 m. Wf ln -mvdz-c*pg t: *hq)isajm)6 )y9 (7ssmgyhat happens to the magnitude ofytf)mzy6j (inmh ga:lssds-) )gmc 7pv* -q*9 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 sfl4gfpe ; .ok0,(3iuqg/bobx8 *jo b1.0 m. What happens to the size of the force on the proton if the electron is movedojqpb , 48ox.bf( g kifu /o;sgl*30be 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of u wtwa ;)ykd0,bm 5-zga 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 squyt au bkd g)0z,wwm;-5are. 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 equp sg)-, fqg;epilateral 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 p)qpge;-fsg,at one of the other vertices?

  Which of the following is n452t;gx w(dfvbgz bf6 ot a vector?

  At twice the distance from a point charge, the strength of the electric fe(sr1vox lyt1yxk 04 b3( vd8uield

  Is it possible to have a zero electric fi jw69i)(,ho mlnz;9sqtg,wo veld value between a negative and positive charge along;,99 j(wso)hnw, tloiqmvz6g the line joining the two charges?

  Is it possible to haq 2oc .3qy(kxu)-hu ro)dqf h1ve a zero electric field value between two positive charges along the line joining the two chqf uo32 y- )q.()hudhk1rq xcoarges?

  Electric field lines near psixky(1y6xxhl6k8 ozk2n( g-xmtive point charges

  The electric field showlkm2d:h4u0+q2xi:w3e l nz pwn

  Can electric field lines interseccof bl4,y ).iq 1ye)j 5g:kyiwt in free space?

  A solid block of metal inv u/gqmqk0 g y;b8h:xw az)87z,qf u 2b3ko1py electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block'xwu yb 01kzaq)q; :u,f88gvpb/ok2m y3zqh7 g s interior.

  If a solid metal sphere and a hollow metal sphere of equalksjw0l w/is4 + diameters are each given the same charge, the electric field (E sl 4/iwkjsw+0) midway between the center and the surface is

  A cubic block of aluminum rests on a wooden tav4fut9f. r*mv :++zkh wx gg3bble in a region where a uniform electric field is directed straight upw94wtvm+u*3g x:bz k gf.r hfv+ard. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an ea+w8aw ) 6zdd/om j8 .1eej6bjxyf3lylectric charge

  A positive point charge is enclosed in a hollow metallic spher4x w2+snpd t0vsf m5 na7em*j8e that is grounded. As compared to the case without the hollow sphere, the electric field atnj fe0 dmstv45 +mn*287wx aps a point directly above the hollow sphere has

State three properties of coo 5j ao-a/ig/dlfe3;* ltpm8rnductors in static equilibrium.

State Gauss's law.

  The charge carried by t);j6db)br1ml;e m6sa+yh-py1u c o tone 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 ofchrii/d3 ed3v7bl3)9vqw2n,f pua u * +2.00 mC. How many more protons than electrons does this piece ofh2vc7qv e 3ip3w ld*9ru)uab ,/in3fd plastic have?

  What is the charge on 1 kglyhk07qzu lhf-0fuxf y+3jtq6v *a. 8*sby0 o of protons?

  An atomic nucleus has a charge of ai;ky-jvj.i- $+40e$. 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 values of 2.0 a+i5/ kf5 wbs3 sem) yjzadxa,z.c7a;vnd -4.0 mC, r, c5vykia/ mbzaa;w .efsszxdj3 +57) espectively. What is the magnitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the s(e6 jjn5dgv7 ; izo,vforce between them is 1.0 N. What is the magnituei v6 (nd5;svgjz7o, jde of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far aw2b hv/ y(((nkc sfsmc2g.l9xpart are they?

  The force between a yfan4*dnfxe x n6io9+ s12eqi)69qvy$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially 2.0 cm apart, experi.za gsxn ,2ft:.x8yha ence a 1.0-N force. If they are moved to a new separation of 8.0 cm, what is the electric :.y2 sag n.,x zx8tfahforce between them?

  Three identical point charges of 2.0 mC are placed on the x-a7j8v*nj1i p;d9bjc6 n(cac ji* rpxv9 xis. The first charge is at the origin, the second to the right at x = 50 j 96n*7(abx9 r8jjcv ipipc*dvn;c1j 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 xk9v4mn4lzs ). 0jfh /lvs.psplaced 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 acts vssjml)v0n k/ 9xl.z4.shpf 4 on the charge at the origin?

  Three point charges are located at mal y6d zj3*u/the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = ul6m y* da3/jz-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 center of a square, and a second poina t5k*0,u queyagoq;4t 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 coau5 uea0 q;ygo*qk4t,rner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 kj+.mtf3 /mko*hcv/zb):y a o m); Q3 = 5.0 nC is at (0, 0).cjah y)kotzfmm:o+3/ /.bkv* What is the magnitude of the net force on the 5.0 nC charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = 3o*e*ts+ pfd1c tm1y*fd6wqe-1.0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 nC char e3*dmesydq161pt* t+o*ffw cge?

  Three identical charges of 3.0(r; 6sl1e6wr2rg vkuu mC are placed at the vertices of an equilateral triangle which measures 30 cm on a side. What is the magnitude of the electrostatic force which kv6u e g (;6sw2lr1rruacts on any one of the charges?

  Consider point charges of +Q and +4Q, which ojomhyk7d 932g grw) 2are separated by 3.0 m. At what point, on a line between the two charges, would it be possible to place a 92ygjrgo 27k)whmd3 ocharge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin and a +9.0-C charge is at x =sc mf m(j7x/ f4xmf yv .e;j1*dfprf:+ 4.0 m. Where on the +dxc(vxm j*ffepys17;/j4: .mm ffrfx-axis can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a.at 5eqk fqw,g 73rd0c- Where can a third positive charge +q be placed so that the force o0 qafc53q-gr7ke ,tdw n it is zero?

  A copper penny has a mass of,5ix62xeno j,pgq.kpf8e4sa 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 ag8:)j1dut 1 ddhnh u:o xv9nvt7ainst the force of gravity by the attraction of a fixed proton some distance abov:)89thdo1xvvd j 7unh1n ut:de it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by nonconductingps;q)j7fj o.r threads which are 30 cm long. Both are given identical charpjjr7;q osf).ges, 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 the magnitude of 54n6( eu vr)f*pm5ivy6li bua the electric field at a distance of 1.0 m from the nucleu6i* (6u5)5yurbmf liev apn4vs?

  What are the magnitude and direction of the electric field at a distanc2z pui.ay6 tl;vkgxi2ru;r9 ,e of 1.50 m from a 5; zvx,6pr2tlki.ua2 ryu9 ;ig 0.0-nC charge?

  A 5.0-C charge is 10 m from a 8ipg: qbh w tsr-*x)i*g1p;tfsmall test charge. What is the magnitude of the electric field at*whxts* g bprt1if)gp- qi;8: the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What isa6u0 ,y icma5x the direction of the electricc6xi,0a m5yu a field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of th nt jkioow2 :6,t*7qime force experienced by a 1qjt o7wn*k:it m2o 6,i.0 nC charge placed at the location of the test charge?

  Two point charges each have3:p mrq.g3sj g a value of 3.0 C and are separated by a distance of 4.0 m. What is the electrsj 3m.p: grgq3ic field at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a meter stick and a -4.w;muj (j l (ltkq9tl7)0 mC charge is placed at thkl9jt wq(l7tu) l; (jme 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 mC epaxp ,k ee7hi +i(2l8+rg4i ycharge is placed at the 50 cm mark. At what point on a line joining the h,ygar8pke4i2ip(xl+7 eie +two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.ec.7fr ldgz 2, bb3m.s rp wf mo(rzy-;i.*ic.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at ti;e dp.s( mrofc2bmzgbi.y 3-,c.zf.*lr r w7 he point midway between them?

  Three 3.0 mC charges are at the three corners of a squ6 lac wo)u2xo/5js;ffare of side 0.50 m. The last corner is occupiesl6 /5ju fw f;)caxo2od by a -3.0 mC charge. Find the electric field at the center of the square.

  Consider a square whi ui)82de s( durnerr*,ch is 1.0 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 (r unrd,r e2e* sd8()iu1, 0); -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 when it is placed in a uniform electrtueoo/1g w z)a g+8a(ric fzeoug1ga 8ro)w +/ a(tield. What is the magnitude of this electric field?

  A particle with a charge of 4.0u eb4*yo3ra-z 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 ot, nz,n j3;2ssj6rsmg is placed in an electric field of 6000 N/C pointing downward. What charge must j36jnr;,,so2z mnss tbe placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carries a ceb7ez fg ab3 73yesq81harge of -2.00 nC. The ball is placed inside87q13a7yz3bb sefeg e a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radiutc fz93+6k t3whmwfb0s 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from the sphere's surc+36hz 3 fmwbf0wtt9k face?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 m7glo:txhv ofi .q :rml0) s)d6C. What is the electric field 6.0 cm fromi sl):g:fdv.molxoq7r h6)0t the center of the sphere?