State the law of conservation gk pslxk9 rb ;o)y)5 1o07ozuh;iq;lsof electric charge.

  Is it possible for two negative charges to attract ewzxg/1wh,.uz7ljz 4t ach other?

  Is it possible for a positive and a n8/ .rav(h wf9g0km kgyftn8h+egative charge to attract each other?

  A glass rod is rubbed with a pie6lc5bmv +it(. qpm m,s.0ba dcce of silk. During the process the glass rod acquires a positive charge and the si6t.sc(vp .c+am,b l d0 5bmqmilk

  A proton carries a

  The model of the atom s kok3vi+dvi1qz3 6kd yj :um0/hows a

  A neutral atom alwayvk- hdf7xhs q9 3g- 6qs9hiz s2-m6pwqs has

  An atom has more electrons than protons. The atom i+1f3lx dora md6*d8ces

  Materials in which the electrons are bound very tightly um+/8wu6h-; o f 4p/jlv4cjuq)fkax ito the nuclei are referred t/j4 wo4i / l cvkq-u6+)a8hf uufp;jxmo as

  Materials in which the 4) t1ga8p afom;k 6o(p pc4a yb:/hnxrelectrons are bound very loosely to the nuclei and can move aboutpoxm6 p4af nh a g oy1r8):p;(a4/tbck freely within the material are referred to as

  A negatively charged rod is brought near one endi1-pbdq*7 5ip kai rn,rh;*qm of an uncharged metal bar. The end of the metal bar fr*ahmp5 iqdqrk1b-*,pii n7; arthest from the charged rod will be charged

  Sphere A carries a net positive charge, and sphere .),/a uruilex B is neutral. They are placed near each other on an insulated table.u.ui ,arl xe/) Sphere B is briefly touched with a wire that is grounded. Which statement is correct?

  How can a negatively charged rod charge an elec t+19q9 cltgyrtroscope positively?

  An originally neutral electroscope is briefly touched with a posit h ia6 b/sv+z;1epwlt9ively charged glassa9iw ;h /zp+le 6ts1bv rod. The electroscope

  An originally neutral electro7zaz,wkryt8q8uqb mi )x 3z )7lhj8 8zscope is grounded briefly while a positively charged glass rod is hemzqx) 8wzu8q bty7 kia ) ,zlhjr783z8ld near it. After the glass rod is removed, the electroscope

  A positive object tou xyaajj/(k*r 8ches a neutral electroscope, and the leaves separate. Then a negative object is brought near the electroscope, but does not touch it. What har jk(jxa/ ya8*ppens to the leaves?

  A large negatively charged 4(l u rpg8kmz+object is placed 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 firslru4g(+ z8p kmt 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 of tq2c oor kax37,v1tt (u lgr/9mhe Coulomb constant $k$, which appears in Coulomb's law?

  Two charged objects are separated by a distance d.3+gq/ios2 x q e1/jhfj The first charge is larger in magnxs3iq2e j+ 1of/q jg/hitude than the second charge.

  Sphere A carries a net charge and sphere B is neutral. They areaov d6:lp6lko ,b zc/vw5w ,9i placed near each other on an insulvl/6l, wib kz6 wd5:v,a9opo cated table. Which statement best describes the electrostatic force between them?

  Two charged objects attract eac-reejy jg54 r7h other with a certain force. If the charges on both objects are doubled with no change in seer - y7r4j5jegparation, the force between them

  Two charges are separated by a distance 9rgqa .x2jv-pj 9/j 6 5zguz4kg zl,zwd and exert mutual attractive forces of F on each other. If the charges are jkjxl4-rwg/.zu9p9 va z2,5zgz g6j qseparated by a distance of d/3, what are the new mutual forces?

  Two charged objects attracb4tj kj7iu2a 6t each other with a 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 b2j k4 ji6ut7areduced 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. Wh5idit/l7(0*4xrdmf0 pi b igaat happens to the magnitude of the force on the proton if a secoig*bp4fa/ii7 5 (mx0tdl 0dirnd electron is placed next to the first electron?

  An electron and a proton are :qx6y5c0fuc5 gse m)h;er-hw separated by a distance of 1.0 m. What happens to the magnitude of the force on the first electron if a second electron is placed next tog06q) f:cm hsyc5;e wxe5r-hu the proton?

  An electron and a proton are separat o:j i,ch wzqp7e;/ucbgl:i43ed by a distance of 1.0 m. What happens to the size of tw:bh,3p/eq lgo 4 ;cic j:izu7he force on the proton if the electron is moved 0.50 m closer to the proton?

  A point charge of +Q is placed at the center of a square. Whq8qs b54cw-fwknn q( +en 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 o fcwkq4bw+ qn(n -8qs5ther 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 equilatemo;s t20pcyr ppvk8v,6)2snsral triangle. When a second charge of +Q is placed at one of the triangle's vertices, an elect;sp6r 0c mvv8 tsn)2o,2psypkrostatic 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 hii)c2zxycy7 gn)x a;h 0b;9 rp* as:dnot a vector?

  At twice the distance from a point charge, the strengthb z(8f.w et*mh 4a-zqh of the electric field

  Is it possible to have a zero electric field value betweenzq k-r f1h7;oygd m6/zs ;.pkk a negative and positive charge along the line joining gr -s;dhkk z1/7z oym6k.pf ;qthe two charges?

  Is it possible to have a zero electric field value between two positive chargu2wf5l k t*b1vvt0-upes along th luw2vf0uk5-bt1tp *ve line joining the two charges?

  Electric field lines near psitive poin0yu 92ollad m9t charges

  The electric field sh )s5tllr0l//n h d2-q:7bt;kb. hmegzq nu f2qown

  Can electric field lines inter .p f:oqge7e5hcgtm;d u;pp)i) oli7(sect in free space?

  A solid block of metal in electrostatic equilibrium is placed in a un 3/yvv u cdz(y8b14 kp)z;dtfsiform electric field. Give a st1ybpv;uck dy 4)vzs8t3/z(dfatement concerning the electric field in the block's interior.

  If a solid metal sphere and a hollow metal spz u8lvhz 4pu,teyphm4f)7 de: tn v./663k kirhere of equal diameters are each given the same charge, the electric fiel ppi8 e3,k v) 4r4ukzm. ttfzh/v6dnyuh:l6e7d (E) midway between the center and the surface is

  A cubic block of aluminum rests on a woodez8qu ic* *dwt)n table in a region where a uniform electric field is directed straight upward. What can be said conc8) wcu*dtqzi* erning the charge on the block's top surface?

  If a conductor is in electrostatic equilibrium near an electric chark .5,nidv*mvns*3b tmge

  A positive point charge is enclosed in a hollow metallic sphere that is gu7p4trronf 39m8l1 mhrounded. As compared to the case without the hollow sphere, the electric field at a point directly above the holl9 4mmfh7ur3l8 on1rtpow sphere has

State three properties of conductors 5wc 7 kdjmcw8( ,mcloi/eaq -vx.d9hz0+,zxcin static equilibrium.

State Gauss's law.

  The charge carried by one ele,ni0te n9hn g 29v7oz ghbp9c3ctron 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 +2.00s:cpbf yxntebb*hw-j a3 *++4 mC. How many more protons than electrons does thi4sx+w -c+y3 **pt : jabbnbhfes piece of plastic have?

  What is the charge on 1 kg oq h yx09f4j,ekf protons?

  An atomic nucleus has a charge otf : ;nmo1vgap0undja-xzb2, ,/1 y mnf $+40e$. An electron is $10^{-9} \; m$ from the nucleus. What is the force on the electron?

  Two point charges, separated b xfxa2* ra11t zi-0isty 1.5 cm, have charge values of 2.0 and -4.0 mC, respectively. What is the magnitude of the electric foriazts01i-1f2x*axt rce between them?

  A 1.0-C charge is 15 m from a secosv ,u6a-l7/pl i9oltond charge, and the force between them is 1.0 N. What is the mal 9-uo lpvl/,ois67tagnitude of the second charge?

  Two 1.0-C charges have a force between them of 1.0 N. How far apart are o1fuw3sk 4-wz+cr)ss they?

  The force between a ,y 42v fznqi8j$30 \; mC$ 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 forct6koi/s-qm+.zq z 0- pzwmx:l e. If they are move:o -. z+zq/lsq6z-mw 0kxp mtid to a new separation of 8.0 cm, what is the electric force between them?

  Three identical point charges of 2.0 mC are placed on the x-axis. The 1etjbq 2.hk6 *py nk *m;8uozzfirst 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 ele*8 jo1;kkqp6bt.uz y nhe z2m*ctrostatic force which acts on the charge at the origin?

  Three point charges are placed on the x-axis. A charge of +2.0 mC is placed at quukbxjlau 7k-)5 00fthe origin, -2.0 m C to the right at x = 5k)j7 -uu akl0x0b5fqu0 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 = u5;5k/v otndr2.00 mC at x = 1.00 m; Q2 = 3.00 mC at x = 0; Q3 = -5.00 mC at x on tk5vu/d r5;= -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 xq/brsj 6 4e3ua square, and a second point charge of -Q is placed at the upper-le qrs3j64b/xe uft 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, 0.cye7s:lf qkuvdt0p /7 2py.;a10 m); Q3 = 5.0 nC is at (0, 0). What is the a ls yef7 7.ytp0;p kudq:vc/2magnitude 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,b k(irqp1; cv3 0.10 m); Q3 = 5.0 nC is at (0, 0). What is the direction of the net force on the 5.0 ;( pckvrq b1i3nC charge?

  Three identical charges of 3.0 mC are placed at the vertgvucldx38+)z;+ dywf ices of an equilateral triangle which measures 30 c8 x3fcl+)y+z ;d vdugwm on a side. What is the magnitude of the electrostatic force which acts on any one of the charges?

  Consider point charges of +li - r7 (krq6za th5zamnz3j49Q and +4Q, which are separated by 3.0 m. At what point, on a line between the t9ntqz-lmja5ar3 6 7izzhr k (4wo charges, would it be possible to place a charge of -Q such that the electrostatic force acting on it would be zero?

  A +3.0-C charge is at the origin ah:q;l.n amwv5to;(9 isjs/-y f1f vvknd a +9.0-C charge is at x = 4.0 m. Where on the x-ax;1m s5 / wvnofjiatl9s(hvq:.vk-;yf is can a third charge be placed so the net force on it is zero?

  Charge +2q is placed.wq: ,/hbq8h ukboov-w 3; yhn at the origin and charge -q is placed at x = 2a. Where can a third positive cwqoqh,k-;/ : h3.8oub hvynwbharge +q be placed so that the force on it is zero?

  A copper penny has a mass of 3.0 g. A tot/) u jrfmy )av-9my;h) dn7+k-bxs cgbal 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 gryo29g( 3q fcnwhyz62l dk /s6yavity by the attraction of a fixed proton some distance above ochylzgsfy6 y(k26 nq d39w/ 2it. How far above the electron is the proton?

  Two 0.20-g metal spher+j*4ou6rbgixv c /+xoes are hung from a common point by nonconducting threads which are 30 cm long. Both are given identical charges, and the electrostatic repulsion forces tho ux*rv+bxo 4cj/ i+g6em 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 tht0v*4p x/ fiqi-o m5l -nhgfj*e electric field ao0jil/mgp qf-n5 *4 ivxt*h-f t a distance of 1.0 m from the nucleus?

  What are the magnitude and direction of the electric field at a distaa2 he2 fi7bq,toiaez5 vb0z0/ nce of 1.50hfva 2/a5z0 i b,0qitb7 eezo2 m from a 50.0-nC charge?

  A 5.0-C charge is 10 m from a small test charge. What is the magnitude of (9)j kblwdfk ,thot ,)wzb6r. the electric field trf, kd zbw6k l9)bw ,t(.)johat the location of the test charge?

  A 5.0-C charge is 10bd1;s/u1 az(-rr8l s/ ,iq ze omyr:j 8jki;zr m from a small test charge. What is the direction of the elz ojzu,rr(is/azdsy j/mr l;; :8i-e8 q1rb1kectric field?

  A 5.0-C charge is 10 m from a small test charge. What is the b7 i, u*j.mwpomagnitude of the force experienced by a 1.0 nC charge placed at the location of the test u b*.iw 7p,omjcharge?

  Two point charges each have a value of 3.0 C and are separated by a distance 7i;/saek;xu gof 4.0 m. What is the electric field at a point midway between the twu sk/;ae;i7 xgo charges?

  A 5.0-mC charge is placed at the 0 xx7 cct.v)ha) lhx+ krl c*6,dcm mark of a meter stick and a -4.0 mC charge is placed at the 50 c ch,v))t*ckl7.+ad x6h c lxxrm 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 - rh+m6x,qxiref: +yi2(kje1 ;xl rbxgc4yt4 74.0 mC charge is placed at the 50 cm mae x+j1qk2ybx:6h7xli,yr(4;ec4g i m+rf xrt rk. 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 hd,jb05nh2c t,zw r r6are placed at x = 0 and x = 0.20 m. What is the magnitude of the electric field at the point midway between th,n6r2c 5tr zjhbw hd,0em?

  Three 3.0 mC charges c.wfce3 xf +0iare at the three corners of a square of side 0.50 m. The last corner is occupied by a -3.0 mC cwiff.e3 +c0cx harge. 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 the co zdl,oev+94wqo imq. ,rners of the squaro lv .m9oi4ze, qq+,wde 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 c t:m33hwzvi z5harge of 5.0 mC when it is placed in a uniform electrichvz:t5m33i w z field. What is the magnitude of this electric field?

  A particle with a charge of 4.0 gl-v*6gcj g4wmC 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 mav9xp7cd6p )eg jxppemqy (xr+wde9ur: /74 e7ss 0.120 g is placed in an electric field of 6000 N/C pointing downward. What charge must be placed on the ball f+xppe6vdg uw7 ed er)q9/rjp9my: 7c(xpe47 xor it to be suspended?

  A foam ball of mass 0.150 g carries a charge of -2.00 nC. The gvn zq-s1.o+a *z7t icball is placed inside a uniform electric field, and is suspended against the force of gravity. What are the magnitude and direzni+17oq zcsva* g- .tction of the electric field?

  A metal sphere of radius 10 cm carries a mc u63p4.herd 4worsc3h7k ( fcharge of +2.0 mC. What is the magnitude of the electric field 5.04p mr7h d3he.cwfk 34s6ouc (r cm from the sphere's surface?

  A metal sphere of radius 2.0 c5ii/yl,m d9o +vx tr/tm carries a charge of 3.0 mC. What is the electric field 6.0 cm from the centetiymd tv/5/ ,r 9ilxo+r of the sphere?