State the law of conservation of electric cha0jm : niusa)fp b:us6 .0:tynarge.

  Is it possible for two noac30g41ks/1st1 hyt pg wv q cz62hr2egative charges to attract each other?

  Is it possible for a positive and a negative charge to;f3m +bj)f irvqjr:n*jgi)09 rn(fct attract each other?

  A glass rod is rubbed with a piece of silk. During the procnbm *3w- mxml4ess the glass rod acquires a positive chalxmbm*4n m-3w rge and the silk

  A proton carries a

  The model of the atom sho(hlq ) k.ba: 41yzikwxws a

  A neutral atom always hae+ch 1-rw, pngs

  An atom has more electrons than protons. The vgdwylqwb9;5-7,q2w vl3ponatom is

  Materials in which the electronj)v-yk1tgeg7 a()u okr95mpy s are bound very tightly to the nuclei are referred tooeuk 5 yvrgamp(g7 )j-9y )k1t as

  Materials in which the electrons are bound very loosely to the nucleiftyo5 vsn2wrt0;z z83 and can move about freely withinf 5roz3v8z;s2t twn0y the material are referred to as

  A negatively charged rod is brought0kd9r6cvq: yz near one end of an uncharged metal bar. The end of the metal bar farthest from the charged rod will ber ck96vd0y:zq charged

  Sphere A carries a net positive charge, and spp.o :*p6pd2xucz r xmjb1s *5dhere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with cpru:5pxzd d1jmso xbp6 2* *.a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an electro4fkov7o 2oo 6gscope positively?

  An originally neutral electroscope is briaa 2(k(zu fb5ec-4lgtl+yr; sefly touched with a positively charged glass rod. The electf5-4(crak e au;l+2gy (sz ltbroscope

  An originally neutral electroscope is grounded briefly while a vc512 9fv5tf)sufgg lpositively charged glass rod is held near it. After the glass rod is removed, the electrotc9vff5fs2 ug)vlg1 5scope

  A positive object touches a neutral electroscope, a0do0gf,g)rr7 l1vnjk b2c3 fcnd the leaves separate. Then a negative object is brought near the electroscope, but does not touchrk0fj og d cnf),rl1vb3g72c0 it. What happens to the leaves?

  A large negatively charged object is placed on an insulatebhbh)q5tcv23 dlej) -d 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 forward, but does not touch the nega b-3qdecb5j t)hlh) 2vtive 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 there mi:6x:g.iwf,t 5uz Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are sepa;oif9u.(am15/ ui4d hqg vvfprated by a distance d. The first charge is larger in magnitude thauag ff4/mhdp9i iouv(.q5v 1;n the second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near eavo;1ucfr;arn.-wqfm(o qw )l5r/,tnch other on an insulated table. Wh5; f, c)/mo vlar1qufrq .wr-nt(;w noich statement best describes the electrostatic force between them?

  Two charged objects attract each other with a certain force. If -noi (- dwm r+h0hp/gkthe charges on both oohihr + p(k-n/ 0d-gmwbjects are doubled with no change in separation, the force between them

  Two charges are separated by a qcu1jzg8 p2t 0distance d and exert mutual attractive forces of F on each other. If the charges are separated b01t zcpqu8j2 gy a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other wi;. oklyaq, akta8ph7,th a force F. What happens to the force between them if one charge is doubled, the other charge is tripled, and the separation distance betwlykq kpotaa ,7a.h;8,een their centers is reduced to one-fourth its original value? The force is now equal to

  An electron and a proton 41pnzmnoe8u :are separated by a distance of 1.0 m. What happens to the magnitude4:zue8 mn1 opn of the force on the proton if a second electron is placed next to the first electron?

  An electron and a proton are sebil y0oqpz((p ).qki7mkc n +9parated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is pl pqz9oq i0pbn.k k7m(+li)cy(aced next to the proton?

  An electron and a proton are separated d4 c8pw)5q0a eordwo+w79s/xpatb g; by a distance of 1.0 m. What happens to the size of the force on the proton if the electron is moved 0;7pwp94trw/q)0b d co osea+ d5axw8 g.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a second point gqi idpig1d kai 2i; +4lyk:5;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 ;i4l:5 k gi1y;dp2qdikagi +i 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 placed at the centroi u-l.6 h)3yvb+zmv;po ga;ddi d 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. What is the magnitude of the force that acts on the center charge due to a third charge of +Q placed at one of odpgb +6)- ;vm3ai . dlhz;uvythe other vertices?

  Which of the followinglvfx ih 4x*w,z5 -h,ge is not a vector?

  At twice the distance from a point charge, the strength of cjjd9(1jlks- p 1 j9jj1ll1cd the electric field

  Is it possible to have a zero electric field vafq/)o 8lacymaj;fcplc z66+8lue between a negative and positive charge along the line joining 6y)ccf8+8c/o zqf aajll6 ;p mthe two charges?

  Is it possible to have a zero electricy(jijanedtb( 6 7vre4ofxy: + 9sm ..g field value between two positive charges along the .oj ye n.jrvbd69 sxtgfeayi(4:7m+( line joining the two charges?

  Electric field lines near psitive point chs9 dr8;t bx qol*2ggi+arges

  The electric field shova srgas(nth(95 +s(wwn

  Can electric field lines intersectt8rv wg +730*qv) sejj1 h5q8xtzdy lt in free space?

  A solid block of metal in electb ud -j:,ep.-;jlt hv17rdl korostatic equilibrium is placed in a uniform electric field.dr.ke 7,;-pj1tbllu:v h od -j Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow me 1ghm3beqz. r-tal sphere of equal diameters are each given the same charge z 1hq.3-bergm, the electric field (E) midway between the center and the surface is

  A cubic block of aluminum rests on a woo 93n, mstni2pfo-7bs3kyb k b*den table in a region where a uniform electric field is directed straight upward. What can be said k7ik* 9m ,fs3bbyopst23-nbnconcerning the charge on the block's top surface?

  If a conductor is in electrostatic e;c4 ohn 2;8lhbbh gxh*quilibrium near an electric charge

  A positive point charge is enclosed in a hollow metalysd;rird/k3 -rrwmn) 198lb; hf/nt wlic sphere that is grounded. As compared to the case without the hollow sphere, the electric khd8tnbnrism //f r-; r3rd y;1wlw)9field at a point directly above the hollow sphere has

State three properties of conductors in st bc+ux 7xa,i :;t7nfil( +axocn2oot2 atic equilibrium.

State Gauss's law.

  The charge carried by one electron is ;8k*ohk cw;ix8ltfou az,21n $e = -1.6 \times 10^{-19} \; C$. 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 tha*i vps9i/jl1 w ,/akt w72ntstn electrons does this piece of plastic haatl tvnwi 1s/ 72kwi 9/p*sjt,ve?

  What is the charge on 1 kdzmk+x(eg1u) g of protons?

  An atomic nucleus has a mjn7 04t4swt e igo-h+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 sctpus r98l2., have charge values of 2.0 and -4.0 mC, respectively. What is the mag put8sl. s2cr9nitude of the electric force between them?

  A 1.0-C charge is 15 m from a second charge, and the force between them is 1nze8mpm b4awtqr6* 6; hodu.7 .0 N. What is the magnitude of the se7t 8a6 6ebzdun.;rpqwmo hm4 *cond charge?

  Two 1.0-C charges have a force between6rrmc t3fha 3b/96qx s them of 1.0 N. How far apart are they?

  The force between a 7o7h5 pcef(uk:j:a(8un hz tp$30 \; mC$ charge and a $-90 \; mC$ charge is 1.8 N. How far apart are they?

  Two point charges, initially ;lb3r zd -ov7t2.0 cm apart, experience a 1.0-N force. If they are moved to a new separation of 8.0 co;z73rb vlt-d m, what is the electric force between them?

  Three identical point charges of 2.0 mC are plaqh 1/d:u3i jcwced on the x-axis. The first charge is at the origin, the second to the right at x = 50 cm, and the ihw:q/j c3du1third 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 tn0qc:r+cj:c8h*yxhcrt b q 2a.; o3gdhe 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 direb gchc r+0 xq*ytn8j:h q2:;.3 racdocction of the electrostatic force which acts on the charge at the origin?

  Three point charges are locat.q9 (1me3 jmbk z lr,5l2n71jy4nnir wmko 0pred at the following positions: Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x = lwn m1, pz(o4kmylqj05k3 jmnb. r e9nrr1 2i7-1.00 m. What is the magnitude of the force on the 3.00-mC charge?

  A point charge of +Q vr+,7d4s ul: 7wtb rp f(d8qlqis placed at the center of a square, and a second point charge of +vtsf 7,q4dwdbrl lu8q7 p:(r-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 corner?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0ouu: (m. zjs-t 4h,jeg.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charge?uo,s (jm ze:t.g-ujh 4

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (0, 0.10 m); Q3 = 5.0 nCe28nm jjk 0ow *i9dy5d is at (0, 0). What is the directdio0 9n ymejw5jd28k* ion of the net force on the 5.0 nC charge?

  Three identical charges of 3.0 mC are placed at the vertices of an equilaterav4wy3 uxx9 dplv5ah98l triangle which measures 30 cm on a side. What is the magnitu ydxx895 4v3alu9vpwhde of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are z-p 1;se.ji whseparated 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 electrosje. zp1w;- ihstatic 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 = ayvq3q 5n6jx9v52 2npt4-fgr gzrfd ; 4.0 m. Where on the x-axis vgrn65 9yva32nt; fq54frgzxjp-q2d can a third charge be placed so the net force on it is zero?

  Charge +2q is placed at th3rmbudk p5.*lbx0 :mla9;t zp e origin and charge -q is placed at x = 2a. Where can a third positive charge +q be placed so that the force on :x0t* klrzl udpmb pa539 mb;.it is zero?

  A copper penny has a mass of 3.0 g. tb r unyt cv6r5293ih:qve.op 06:rgd 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 attrav-dmz .xqc* gr6at0- s(tu)jqction of a fixed proton some distance above it. How far above thez-rq- j0 gax6q*cm(.uvstt) d electron is the proton?

  Two 0.20-g metal spheres are hung from a common point by no.b sjxf0cu,a -nconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the anglbua cjx-0,. sfe 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 :-)us g ,ak.en pk5oqy57mdzwthe electric field at a distance of 1.0 m from the nucleus.sa k)qn e-wo,p:dz gku575my?

  What are the magnitude and directmycss:v mfa546, z-vfion of the electric field at a distance of 1.50 m frov,vc6m 5 fayf -s:4mszm a 50.0-nC charge?

  A 5.0-C charge is 10 m from st yns3rd,94b:k oapi:pcoc e:j p890a small test charge. What is the magnitude of the electric field at the locacj3a0:8r 9ntb:e so9p i:s pdycp,ko4tion of the test charge?

  A 5.0-C charge is 10 m from a small test charge. q)enn;9(lev k What is the direction of the electric;v9l)qn e ekn( field?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude o xo/*(3jnxeewf the force experienced by a 1.0 nC charge placed at the location ofj*(wx/o e x3ne the test charge?

  Two point charges each have a valueymk vw9x7l jb*b2s8 6k of 3.0 C and are separated by a distance of 4.0 m. What is the electric field at a poiyj69b7mxlk2 *swbk v8nt midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm maedjmk.p d0+y0wj,; zprk of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the z+ jekm00jpyd .,;wdp30 cm mark?

  A 5.0-mC charge is placed at the 0(n:w 6zs l90qt,opycj cm mark of a meter stick and a -4.0 mC charge is placed at tqypw0oz:c 96 t s,(lnjhe 50 cm mark. At what point on a line joining the two charges is the electric field zero?

  Two point charges of +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. v* uh7ftx u:f*What is the magnitudextff7h:*u u*v of the electric field at the point midway between them?

  Three 3.0 mC charges are at the three corners of a sd i:5;3u uafajquare of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the elecfuaa3:;d5 uji tric field at the center of the square.

  Consider a square which is 1.0 m on a side. Charges are hi4i6t g- r( svhl-4pbg+/crsplaced 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 electric fielb v(/ +6g-4ii4 cpghtshrr-sld at the square's center?

  A force of 10 N acts on a charge of 5.07 (dsvvv60gg o mC when it is placed in a uniform electric field. What is the mag 6vsv07( govdgnitude of this electric field?

  A particle with a chay2hih hjwp / )br/0f;s8 -tlydrge 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 electric field of 60000rd c;d.z md2v N/C pointdm;2zv 0dd.r cing downward. What charge must be placed on the ball for it to be suspended?

  A foam ball of mass 0.150 g carrief5h+p8v.g vrxsj ) he*s a charge 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)s5fj8ver hgv *+p.h x direction of the electric field?

  A metal sphere of radiueuql q9juy,d fx;r9(vc jr7)2 s 10 cm carries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cm from thlxrqe r)j97cfqu,u9;( j2 vyde sphere's surface?

  A metal sphere of radiugm p.,ifnf/d-s 2.0 cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the center of dn,.fi/f p-m gthe sphere?