State the law of con 2kw+ *;w- yeeq:oolksservation of electric charge.

  Is it possible for two negative charges to attrwc4 *c(7efk/je 6l-fed c)fy qact each other?

  Is it possible for a positive and a negative charge to attract n-z(f) w x 958wymg/xwx jp0qmr 09tleeach other?

  A glass rod is rubbed with m.+q.9*85qpg tm gj,a ovs qkwr5+zcl a piece of silk. During the process the glass rod acquires a positive charglqkqos8p +zjg c5v5t a .* qm,.rwm9+ge and the silk

  A proton carries a

  The model of the atom showjq kj9dxbm/ w ufj-+t323l)dls a

  A neutral atom always harf- s4vw m:md/s

  An atom has more electrons than pfr 9q7 5+3/wa tyvnwrsrotons. The atom is

  Materials in which the electrons are bound very tightly to the nuclei are referr q8f ,s)e1jb:5o; xeode0te ssed tob8j oq; o dxe05:fs)ese,1est as

  Materials in which the electrons are bound very lu*d.(jd;ry2,ci ( hyk7 udbw loosely to the nuclei and can move about fr7.y2(drhi l(wcu j;dyu,b* k deely within the material are referred to as

  A negatively charged rod is brought near one end of z 4,/s bm7ka, a2u;wjmnq3kiaan uncharged metal bar. The end of the metal bar farthess7 ba4 wnm3k/u ; izqm,ja2ak,t from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere B is h9lpk/qs7ztjzf2 -bg1 )5ysaneutral. They are placed near each other on an insbj-57tzqhyz af9s s/2 k)l gp1ulated table. Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negativelyoep w2b1p*9dcyd,8 h.orn b/w charged rod charge an electroscope positively?

  An originally neutral electroscope 4t zqzs t9 q)mif+wx2;is briefly touched with a positively charged glass rodfi+94zqqtxm zts );2w. The electroscope

  An originally neutral electroscope *8n2klmz 2me zis grounded briefly while a positively charged glass rod is held near it. After the glass rod is removed, themze*n k822ml z electroscope

  A positive object touches a neutral electroscope, and the zmw nnvb63 cvg*i*tv26eu 8q+wh.9 nuleaves separate. Then a negative object is brought near the electroscope, but does not touch it. What happens to thnc6v*wbg9iq+ *n t2 w3.zvmvnu8 6e uhe leaves?

  A large negatively charged object is placed on an insulated table. d5vk7h p qxua ;yk-. rrs z1c585k:ocd 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, buupdkykc5.d-qhz7vka ; xo s 5:5rr8c 1t 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 Coulomb c3 ci7awf xk n+lu7n6jcq8n, h+onstant $k$, which appears in Coulomb's law?

  Two charged objects are separatedymzyvimi( hj, s-,t:ae: 2l+ n5riof; by a distance d. The first charge is larger in magnitude than the2oi a:+ ylhs y,ier m,v5i-:njm(ftz; second charge.

  Sphere A carries a net charge and sphere B is neutral. They are placed near :v5k nrs,bm3aeach othkbrn:m5v3,a s er on an insulated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract each other with a/r/qu 5kco9o / oimw4k certain force. If the charges on oqwm/ 9o/o 5/4ckk uriboth objects are doubled with no change in separation, the force between them

  Two charges are separ3 dt-iit(cdy-ated by a distance d and exert mutual attractive forces of F on eadd-( i3t- ictych other. If the charges are separated by a distance of d/3, what are the new mutual forces?

  Two charged objects attract each other wit7vy6a wdvl)z;h a force F. What happens to the force between them if ol6 yd;zv7avw)ne charge 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+lilzh-sn(0ht2n:o 5hjc 4bq*9 wqe sej9n c4 separated by a distance of 1.0 m. What happens to the magnitude-+e0 si q hq5jjchc9 b 44n(lh2et9swnl:*noz 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. What haplywe3m3tlzzai1z,. 2kw ) oc i6/x w;tpens to the magnitude of the force on the first electron if a second /,lo. k)mz ltz62 ;iyx3wwa 1 tzeicw3electron is placed next to the proton?

  An electron and a proton are separated by a distance of 1.0 m. Whgfx; / vtfv 6d9t*gq5hat happens to the size of the force on the proton if the electron is mxtfv g/q h6vf5 *g;td9oved 0.50 m closer to the proton?

  A point charge of +Q is placed at3oryov nwp+ o -rzo:0f8f 5cj otb1)5o 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 a+wo-1rv ocpoy: fr nj)o0tzf38 5b 5oocts 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 placed at the centroid of an equilateral trixi j69 p2k06c tayy m93bntce9angle. 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 + ty3 p n2jm6x9bike9tay9 c06cQ placed at one of the other vertices?

  Which of the following 0wi*//2upv fijh-cqeis not a vector?

  At twice the distance from a p oysq*i ib3-,loint charge, the strength of the electric field

  Is it possible to have i 7kj/.n m1 mbqkd3*p*bay)jm sjuqf 95oc)v) a zero electric field value between a negative and positi/ )bkam 1j7iy.f)jj nq9mk 5pu*socmqb *d)3 vve charge along the line joining the two charges?

  Is it possible to have a zero electric field valk 2:3-x) 8ej jik1dbfjjy r:zaue between two positive charges along the line joinix3e j1jr fkj2: :a8kzb)iy -djng the two charges?

  Electric field lines near psitive poc**h r zj13zifint charges

  The electric field showt +stgi97mx6 kn

  Can electric field lines intersela hh5h3w5 .poct in free space?

  A solid block of metal in electrostatic equilibrium is placed in a 1t h iys49s( 9b0uh (mzmau6cxuniform electric field.caizx9m(u yhb0 19sum6t( sh4 Give a statement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow meta8/b i lwx7v www0-s.1i5rtele l sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surfacet7e810 e/xrb ww5 sl-w.liw vi is

  A cubic block of aluminum rests on a wooden table in a reg*p33ee cj3i 6 7c u,:s7nfgtqq c6iaoxion where a uniform electric 733qe6g:i*x caq6 f ,p3s7ouicetcnjfield is directed straight upward. What can be said concerning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near r k(. kvj64lehol mg+ vm3xs;dx9*b3man electric charge

  A positive point charge is enclosed in awf + )j9al)sos hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere hassj9a s+w of)l)

State three properties of conducta;e.k.0ed kq:3pkkk g ors in static equilibrium.

State Gauss's law.

  The charge carried by one electron is )wt6 c 7re5tv9aiz6xw$e = -1.6 \times 10^{-19} \; C$. 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 mv,n8 3l r 7rc( hcfp39yvs/luiC. How many more protons than electronrrc lv8(973f3h uny/vi ,splc s does this piece of plastic have?

  What is the charge on 1 omv b/sd1f/eb5lbne n5+*4qwz5ej 0t kg of protons?

  An atomic nucleus has a charge tzl h93*q v-lhof $+40e$. 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 chane(ggx.t 59js 6y bw9t4p)bwwrge values of 2.0 and -4.0 mC, respectively. What is thesygw )jtb9.6 p5wbx4gne( t w9 magnitude of the electric force between them?

  A 1.0-C charge is 15 be nwrz5.s/ qzd,- /l mfq3:bhm from a second charge, and the force between them is 1.0 N. What is the magnitude of tzlq mqbfrhn 5- z:ew,s3 /b.d/he second charge?

  Two 1.0-C charges have +w5ra kgx/pg5i lz;j4 a force between them of 1.0 N. How far apart are they?

  The force between a aqe 4hc99eqb 9/4 qujd$30 \; mC$ 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 eqyz-jrwp +s1d(vv; xfb,30qforce. If they are moved to a new separation of 8.0 cm, what is the electric force betwee,1f-;jeqz rv d s(ypw x0v3+bqn them?

  Three identical point c0b,ouu4in4lwq2c pn 3harges 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 and4p n,i 20w3n oqu4ublc direction of the electrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC isax 66fc09br xbj;x5 y:zbh2te placed at the origin, -2.0 m C tj 90fxbhxb2 r5:bax ycz6t;e6o 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 on the charge at the origin?

  Three point charges are located at the following positions: Q1 = 2.00 mCo0*m)e sqf5mu at x = 1.00 m; Q2 = 3.00 mC atu *fe0o)5q mms 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 center of a squas7 4e-7z 5pr(r-j pzen;zbrh) m ovhj2re, and a second point charge of -Q is p 74z)7o;- rrp ph5nz( 2ebvsmejzjrh-laced 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 = -1.5mvkg+ eg0xl a00rot o,ek(5n0 nC is at (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC charge?g ka,k50n l0v+r (0o5emt xgeo

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at (s oqqmlans6pq6nv;7i3l 0/d8 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 cnpqs3an0 v;8ql6qlm d o6 si/7harge?

  Three identical charges of 3.0 mC are placq 9)zneib;t* oed at the vertices of an equilateral triangle which measures 30 cm on a si;qoneit )b*9 zde. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q and +4Q, which are separy/3lz . euydm9hg( ,r:j pq/uaated by 3.0 m. At what point, on a line between the two charges, would it be possible to py.ue/(p yu hd/qz,jl9g ar3:mlace 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 a +s5 h ryzpf:o/t.s:y0x 9.0-C charge is at x = 4.0 m. Where on the x-axis can a third charge be placed so the net force on /ptyx5ssy :ho:z fr.0it is zero?

  Charge +2q is placed at the origin and charge -q is placed at x = 2a. gk(7 n*kw:iqlWhere can a third positive charge +q be placed so that the force on it is zeronil:w(kk *q7 g?

  A copper penny has a mass of h6*k pxjqba )(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 thv:m)r+lso5 m wgoy*w6 e force of gravity by the attraction of a fixed p :5y)r+o gm*wvmw6o lsroton some distance above it. How far above the electron is the proton?

  Two 0.20-g metal spheres are hung from a common p3n 6zz5mt5n w-d .rul unm 2wbo1nh0n1oint by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces them apart until the angle betwee 0-5nb l3nntn 1wd6m.nw1ozu2zh rm5un the threads is $20^{\circ}$. How much charge was placed on each sphere?

  An atomic nucleus has a charge of +40e. What is the magni(4 1iorsm;g n qcxh0bqxs-d)3c-lv1u tude of the electric field at a distance of 1.0 m from the nuhxqlrm )-40s13;1ciq(cnx d guo-svbcleus?

  What are the magnitude and direction of the electric fieldttc ,-oa-qomk7 6xv;w at a distance of 1.50 m from a 50.0mx kvt7w6to- co,-a q;-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What hrc 8l m0* zj+wg3 st.;x4yhspis the magnitude of the electric field at the location of thl84t+s3jzpcy hs ;h*mwx0.rg e test charge?

  A 5.0-C charge is 10 m from a sm0x*zjg1g 9i8-qj 0u m a+v)mhkh93plbte /qyqall test charge. What is the direction of the electric m+0/zj38q jg*h uq9)bim ptl0-g v9h1 xyaqkefield?

  A 5.0-C charge is 10 m from a y nd-d2(ne j pv(sq9/csmall test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at ( vy(s9qncje/ dn2p-dthe location of the test charge?

  Two point charges each he*wcwrju/me99 ngd h 9-r*(dfave a value of 3.0 C and are separated by a distance of 4.0 m. What is the electric fiel *n gdj *-uec/wr(ef99wmd9rh d at a point midway between the two charges?

  A 5.0-mC charge is placed at the 0 cm mark of a g oab6y4u-hu--k, yb.o kls3umeter stick and a -4.0 mC charge is placed at thk.h-l3o4b-boys,-ku ya u g u6e 50 cm mark. What is the electric field at the 30 cm mark?

  A 5.0-mC charge is placed at tgqv az3tfr09zuf,* k :he 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. At what point of,9 f:v zq 0tga3*krzun 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 m3esfh2lf 7dc-qi:h cd l/utot 394(nr. What is the magnitude of the electric field at the point midway between them?37:o/hs4i dlter3c f-nqtcl (dfu29 h

  Three 3.0 mC charges are at the three corners of a squareh.wg.zf- dyw4x c 0zi5pt5xt8o2 xh5r of side 0.50 m. The last c 5 5c0pwgr ox 24xitwd.. xhy58zft-hzorner 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 side. Charges are placed at t 7s9jz3bh.3vz kpxnp1ufzh5*he corners of th*k3zz . xvj7pzb5hf p9uh1n 3se 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 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 a u.3m)j*6kigy al,m;bgv2sd electric fij)mdkg,bgsa* i2.v3; 6mauyl eld. What is the magnitude of this electric field?

  A particle with a charge of 4.0 mC has a mass ota1r0tee,x ,q f $5.0 \times 10^{-3} \; kg$. 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 6000 N/ * f x+omdhghn,8./ewrC pointing downward. What charge must be placed on the ball for it to be suspefn mw 8 xd,.h*r/oh+egnded?

  A foam ball of mass 0.150 g carzjq*6h b b;6raclq3- zries 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 mag-*zrcb6 3j zabl6h;qqnitude and direction of the electric field?

  A metal sphere of radius 10 cm carries a charge of +2.0 mC. What is the magnitu)cr+nw 7wwd9m1 ip fp+lie*t1 de oft*lm)p w c+ nf9 1eir7w+w1ipd the electric field 5.0 cm from the sphere's surface?

  A metal sphere of radius 2.0 cm carries a charge of 3.0 mC. What is the eleow,lv4pzm + bswq- x*.ctric field 6.0 cm from the center o mwzbsxl+-p4,ov* qw.f the sphere?