State the law of conservation of electric cjn .hff .qt1ff8m/,aj harge.

  Is it possible for two negative charges to aqg: b g e8e6;b(ols2/5b)zwedfj e-rgttract each other?

  Is it possible for a positive and a negative charge to attra05 niv a2f cy;c:9:zg8cgwkgxct each other?

  A glass rod is rubbed with a piece of silk. During the process the glass rod y,j ;+zi04+ tdv jq5z +gbpuihacquires a positive chargepzygjib ,+j ++h u4vt qd0i5;z and the silk

  A proton carries a

  The model of the atom shows yg h2*7az+. hdjftu.ya

  A neutral atom always i)d9fv*kme0p has

  An atom has more electrons than protons. The atp:y3dlig;zt i/)4 uc pom is

  Materials in which the electronn3jq2wxo5s xp:fq*h4 d8 k)e ws are bound very tightly to the nuclei are referred to a q4pwwo:je fs5*qx 3)khdnx28 s

  Materials in which the electrons are bg:8, ct. ki3jj.- zuc +/fgp6/kuipn,qmrsqk ound very loosely to the nuclei and can move about freely within the ma8u.i.n -pu3ifz/ ,tk,mqps6 crc +j :jkq kgg/terial are referred to as

  A negatively charged rod is broug6 y21nsg 3r:dlfoax)ght near one end of an uncharged metal bar. The end of the metx2:da6lsg1 r ngyof) 3al bar farthest from the charged rod will be charged

  Sphere A carries a net positive charge,(/e ddvx(k n,jrx6o4pod*7ou and sphere B is neutral. They are placed near each other on an insulated table. Sphere B is briefly touched with a wire that is grounded. Which stateme7kd(o,vo4x udr6exon*( d/pj nt is correct?

  How can a negatively charged rod charge ank8h hu s3kxh+ss04et5 electroscope positively?

  An originally neutral electroscope is briefly touched with a posi;7w v zymw74ck:c q)au(ay +nutively charged glass rod. Thw 4a+u)vz7ccn :y;a (wy km7que electroscope

  An originally neutral electroscope is grounded briefly while a positively chah,sc ue e/cv4phc.8c7 rged glass rod is held near it. After the glass rod is removed, the elect v,4/8 he.pcc7sec cuhroscope

  A positive object touches a neutral electroscope, and the leavesivo6-hw 6 1out(6s.,vkv u+c.fxzo yi separate. Then a negwyo,1-ovuksfc.+( . v6i6t x zh6ivuoative 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 insulari,7xbguj7ydi 1g0ij (,g a):5p sda0u um1rdted 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 j u75 ud1 bdrixi,0g1 r:g u(,mapy0i 7s)adgjnot 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 ofyn ja-agj(jb 61+yzc8 the Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d+ i rlu)mkinzo*08 : *xlm0dkz. The first charge is larger in magnitude than the second chargeml zui*k*k)0+i8mr xnol z :0d.

  Sphere A carries a net charge and sphere B is neutral. They are w)u8n:da q b84or jro3placed near each other on an insulated table. Which statement best describes the electrostatic force between theqwo8au8or b)j4:dr3n m?

  Two charged objects attract iuf gr5 -p4r:dk8-cus each other with a certain force. If the charges on both objectfrp5 4u-k8srd: -icgu s are doubled with no change in separation, the force between them

  Two charges are separated by a distance d and exert mutual attraw/8 n1ljbcol+8zqt79 f,q kh/i qaf5pctive forces of F on each other. If the charges are separafl8plbj /tkan75hioq8+9c f,q / q1wzted by a distance of d/3, what are the new mutual forces?

  Two charged objects attrac nfgkij7)7ol *t each other with a force F. What happens to the force between them if one charge is doubled, the other charge is trip i )ol77kfjng*led, 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 1.0cgc cn5,peu1(- 8w(sfa:y ren m. What happens to the magnitude of the force on the pf:rwny,u e s81eag (n(cpc5c-roton if a second electron is placed next to the first electron?

  An electron and a proton are separated by a1 :kh3gw,ig mq distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron kmg:3q1hi,g w is placed next to the proton?

  An electron and a proton are separated by a distance of ub)85 ,ms yaxd tbb(t-1.0 m. What happens to the size of the force on the proton if the electron is movedmtt- bd 5)by8(b,xasu 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. When a secoxe7n) v gwqcnc-p(4 m.nd 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 square. What is the magn vw7p4nxcq.n ) emg-(citude 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 triangle. When28-o sxs gqzwbhkbv(;l:r ;m7 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 kb-s:sv(; ;ml7 2wbghxr zo8q of +Q placed at one of the other vertices?

  Which of the following is notq;l1p.kc:x p+ v8klo w a vector?

  At twice the distance from a point charge, the strengoz-. z63x34r ppuq llgth of the electric field

  Is it possible to have a z62:nwbdh ntw1 ero electric field value between a negative and positive charge along the line j n6b wdn1thw:2oining the two charges?

  Is it possible to have a zero electric field value between two7n2chtgrw8xp 3.)1py 1dc pg z positive charges along the line joining the two charx ndc2p tp)hggyr .78w13cz1pges?

  Electric field lines ng;k-qpc 0j0 x c1uw b+17lmwaiear psitive point charges

  The electric field spr0 el7 :nnx :xq.e0qshown

  Can electric field lines intersect in s2t 3vz4 /ktt+6czc lsv5cul( free space?

  A solid block of metal in electrostatic eqlmgc433k9;r sjscv7k(f0xxouilibrium is placed in a uniform electric field. Give a statement concerxs vjms0(r 9gklc33 c7;kfx4oning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal sphere of equal diaq m)shwkiq+1tq6 7.+ool.c wpmeters are each given the same charge, the electric field (E) midway between the center and the surfaceqqh6 cp1.il+so w)mt+7wq.ok is

  A cubic block of aluminum rests on a wooden table in a region where a uniform +clcc1rfe yt/8 l.. boelectric field is directed straight upward. What can be said concerningtl8y/.cceb+ro l.c 1f the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric ch fo9ec)mxqsou6b1f ;,kc,m3harge

  A positive point charge is enclosed in a hdi7i,g nkf f1w +4lh j*f/dhvxz53uo.ollow metallic sphere that is grounded. /d u.kh13gflo *f7i hfi jdvzn+4x ,w5As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has

State three properties of conductors in s bnoyw3wt ;;wj ,0iq4e+do9 ratatic equilibrium.

State Gauss's law.

  The charge carried by r 4s.j- 1nuc (cl9lr1eg5z5r yyu-masone 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 n. 1fbwr7dlt3 (lmo,ude6td :of +2.00 mC. How many more protons than ele6,(wfd nu e1omdl.d b37tl rt:ctrons does this piece of plastic have?

  What is the charge on 1 kg of protons3wizy)uymk d1wq. neck0: w1k kd+x11?

  An atomic nucleus has km6z p.sc+ah4 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 charge values r/k s4h-ja4yfof 2.0 and -4.0 mC, respectively. What is the magnitude of the electric force betwjf4hk -a4rsy/een them?

  A 1.0-C charge is 15 m from a second charge, and c7p u2cc 0t;jytc2yi2the force between them is 1.0 N. What is the magnct ticupcy7;02 yj2 2citude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are theymtnhs+ /l1 6lqr4mk -i?

  The force between a y/-xi/2clnvo8cqq / p$30 \; mC$ 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.o5t1tfx 8xgqjs;kid 5 01ebz nj+n. i;0-N force. If they are moved to a 8kx; ;5s1+fxtz n50e.1 go tjiiqnbdjnew separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC 3kxi009u etlg 4q ut-4eu. pgtare placed on the x-axis. The first charge is at the origin, the second to the right at x xe.kutiq p40t 3lg e t0gu4-u9= 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 origin?

  Three point charges are place** 99btd0 a uyjsew8uhd on the x-axis. A charge of +2.0 mC is placed at the origin, -2.0 m C to the right s huey80w 9aju**b9dt 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: 1ly-bgy:l:vy7i: o y ra5 wnu4Q1 = 2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 =yoy4vawulygy n1l7::i :- 5b r -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 oq(oti *xjcsuh6,) /fdf a square, and a second point charge of -Q is placed at the upper-left corner. It is observed that an electrostaticoxd ()6 uhj i,*sqf/tc 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, 0.v ji ctjx5yn9p;)71/6f r vdcpgi*(ad10 m); Q3 = 5.0 nC is at (0, 0). What is the magnitude of the net force on the 5.0 nC/pp*d(9i xd)a6 v5 tc; fjvg icy1jnr7 charge?

  Q1 = 6.0 nC is at (0.30 m, 0); Q2 = -1.0 nC is at g0(pzcky )q7-w- ises (0, 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5 -0pzwgs-sk) (ice7yq.0 nC charge?

  Three identical charges of 3.0 mC are placed at thqp7act2dn17,-lvu t qawx20ie vertices of an equilateral triant2v 7n a2p diq, w-ql71t0aucxgle which measures 30 cm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +Q a1iex e 3hv;l7fnd +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 -Q such that the electrhle;v 3xf1 7eiostatic 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 =gz(nm.uqdx6pa( a 7vd*s *zm ) 4.0 m. Where on the x-axis can a third cha n*d7gaxq* pmvz6( (zs .duma)rge be placed so the net force on it is zero?

  Charge +2q is placed at the origin and charge qu e3b*lxm d.jo+ps*kww 43 x5-q is placed at x = 2a. Where can a third positive charge +q be placed so that the fmolx u+d x3ewq3*jsw45b. * kporce on it is zero?

  A copper penny has a ml66 :m2 kckeamxlk4r5.n+es 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 attraction of a fixehps8 xo iv-c34:jlcv;w:r1 ayd proton some distance above it. How far above the electron av 14pvjsy i3- :hxoc ;wlc8:ris the proton?

  Two 0.20-g metal spheres are hung from a common point by non8 as8ywa2:iw*wf(t hpconducting threads which are 30 cm long. Both are given identical charges, and the elec w8w( :8as*h2yipfawttrostatic 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 mak7wfvv54vta :*xb )spgnitude of the electric field at a distance of 1.0 m from the nucleusx7b:k) *aw5f vt 4svpv?

  What are the magnituwe+w3:g irs6yde and direction of the electric field at a distance of 1.50 m from a 50.0-nC w6 iy+3s r:gwe charge?

  A 5.0-C charge is 10 mhuw,a 9mdlg9 kh5wyd(-2wt 3w from a small test charge. What is the magnitude of the electric field atk-2tu ywdawm3dlhw (,5 9h 9wg the location of the test charge?

  A 5.0-C charge is 10 m from a small test charge. What is the di4venxd rd1+u2/ ssib 23z1.k1km zlmr rection of the electric fiel kb/lz1rk2du+ si2red 3mzn14v1m xs.d?

  A 5.0-C charge is 10 m frobg/,ce) m iso0uu li40m a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the loca/iboem,4 lg0ci 0)uu stion of the test charge?

  Two point charges each have a value of 3.0 C and are separated by a distance of . npg ; ypse4i -upggp65mv,dad8n7,r4.0 m. What is the electric fielnmdiypp,.ug 5ven,-pg4;g7a8 6prsdd at a point midway between the two charges?

  A 5.0-mC charge is placed at the n.t:r z)-sown 0 cm mark of a meter stick and a -4.0 mC charge is placed at the 50 cm mark. What is the electric field at the 30 ): -.nwnotrzs cm mark?

  A 5.0-mC charge is placed at the 0 c2hv 3 mb69qybv i2v(fum 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 t vh ivbb2u v3f6m(q9y2he two charges is the electric field zero?

  Two point charges ofa*rp ugh k 6cptg8-.8t +3.0 mC and -7.0 mC are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point mi tcht6 u8*r a8pk.pg-gdway between them?

  Three 3.0 mC charges are at the three coja4 5qzbgse d,-a)5kerners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC charge. Find the electric field at the cqe 5s aa 45z-jbe),kgdenter of the square.

  Consider a square which is 1.0 uuw,q5h t4,b-m: ayvlx bf x,6+mgy+zm 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); +y,x atmm 6zgwl+f4by5v x ,u-u+:q,bh3.0 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 ma ypfp w +jgw2w2(8h66ae th/jC when it is placed in a uniform electric field. What is the magnitude 8/fa6 p2wpw(2t jehy 6hwg+jaof this electric field?

  A particle with a charge of c ;zz+zn7t b4u4.0 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 mbmlv gbu0gvzhe55r7wi607x 3 q at,*cass 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge mgi76*rahblme z05v0 xv,c tqgb3w 7 u5ust be placed on the ball for it to be suspended?

  A foam ball of mass 0. sys0w+j fho f2 y2lh/*97bfxi150 g carries a charge of -2.00 nC. The ball is placed inside a uniform electric field, and0 sy* jbh/ffsh7+2 fxw9o2yil is suspended against the force of gravity. What are the magnitude and direction of the electric field?

  A metal sphere of radius 10 cm car,(m8 xti;x(osfj-oahmwu r+wu 4e2+fries a charge of +2.0 mC. What is the magnitude of the electric field 5.0 cis +2t hx-rfouw(j8 (wfmoe m, 4+u;axm from the sphere's surface?

  A metal sphere of radius 2.0 y);jfd6-um d4 l5mtfmwu( a y*cm carries a charge of 3.0 mC. What is the electric field 6.0 cm from juat-wym6udl(5) m;fm* fd4y the center of the sphere?