If the north poles of two bar magnets are brought ca un f;gf*5*jylose to each other, the magnetsff5y*a u*;gnj will

  If the south pole of one bar magnet is brought near the north n ztfe0u*+a1epole of a second bar magnet, thz +1f eet*0uane two magnets will

  If a bar magnet is divided into two equal piecesj ug;gd;p1c h),

  The Earth's geographic North Pole is magnetically au xp u /,kgpnk857uo+l

  The south pole of a magnet pointrt*y v- yk;1fkq6x i 5tw5)d*3j hdeozs toward the Earth's

  An electric current produces *q9ao93vkzu-5aw qjj c. .cjr

  Which of the following i(/ -nfrk d cug-6(bgmds correct?

  A vertical wire carries a curre eua1wic-7a:x f/xuc,/1t nz ant straight down. To the east of this wire, the magc1-7t:,nfaxi ewxu/a1a z c/unetic field points

  A horizontal wire carries a current straight toward you. From your point op0;ekcww i90r f view, the magnetcw e pi0wk9r;0ic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed frx8ku,gm9n8im4 k 0c ntom above, the current moves around the lomkik8t 49mc,n8nx0u gop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of w r:hq*;3p7 ndxtpgdr4ire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. n734dtgp;d qpr: *hxr What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneti9+ust q6-,m;kk bnnf(us*fy cc field is the

  1 T is equivalent tovxuql) n2p5p/

  The direction of the force on a current f(u50w1ho hzv-carrying wire in a magnetic field is described by which of the following1uvh0wo (fz 5h?

  The force on a current-carrying wire in a zecdhdd2 n5/5 magnetic field is the strongest when

  The force on a current-carrying wire in a magne7 lm0ei *qzh8xtic field is equal to zero when

  A vertical wire carries a cu-zdnbl8r4f6 j rrent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on this cr lj-6n8df 4zburrent?

  A charged particle moves and experiences n s*oyzmb.8adzl(0x()o kr,sia /- zy9xmq j o;o magnetic force. From this we can co (y, .z8zkoldsmx (;9)- ai s z*oxm/jqaryb0onclude that

  A charged particle moves with a constant speed thr8lrksyo4(k( kkn(-pz ough a region where a uniform magnetic field is present. If the magnetic field points straight upwar 8kkpky(kln 4so (z-r(d, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic force ozf.kz a25xa- 9o;zyw fkzrl(*n thi-*zzfzkr 9fo ;zl2x. w( ky5aas particle

  A charged particle is injected into a uniform magnetic159fa,v szkb j field such that its velocity vector is perpendicular to the magnetic field vev9zfk15js , bactor. Ignoring the particle's weight, the particle will

  A charged particle is observed travelinlku6u87jyw 6ug in a circular path in a uniform magnetic field. If the particle u yku6ul7wj 86had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge o;;fo*knnp,2lmffhxf2g19 d xf +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of fo;kfdp , n h2fm;l*xgx912fn the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a univjv6f 1sv -gr,mzoe5/e 2:ulv-p ozt)form magnetic field that is directed straigto )v5ev/ feplv- :s,z6vog12zrmuj-ht downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curvel0xor 6yie,t/9d 9kxjoy86lw upward as the result of a magnetic field. The direction x9 j rie/y69oy,x8l kto06wdlof the magnetic field is

  An electron moving along th l 6n1hgm+g0tpj;0zdk e +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z pzltjn; + kd1hg06mg0 out of the page.)

  The magnetic field produced by a ,kgh7dpl cg)ym 8:9lolong straight current-carrying wire is

  At double the distance from a long current-carryip v0jiv(c q:)8 a jpogk.tzqv:4w6dq;ng wire, the strength of the magnetic field produced by that wd 6(jt0 wkcpo; .qijgazvq:84 :pvv) qire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry iobmpj9wss hr pzo)6 1/k0 o3:h4 qpcb(dentical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your l1 h kpj()m4h3qwo:r o /9 bo6zppcsbs0eft carries current away from you. From your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by--xrm 5dx kjy,-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly betwe- kd-ry,j5mxx en the two wires

  Two long parallel wires carry equal currents. The magnitude of the force bouc-yc 90hvb/etween the wires is F. The current in each wire is now doubled. What is the magnitud9-b0c vuy/choe of the new force between the two wires?

  A long straight wire carril uy+rso)0y 0 *2s d+nvw,rhwves current toward the east. A proton moves toward the east alongside and just south of the wi)+vrwu yrn*los,dhw00vs2y +re. What is the direction of the force on the proton?

  A wire lying in the plane o qjq;4vxovo yf)6f0; tf the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, ao60fq);jx;yq vtv 4 folso in the plane of the page, from your right?

  Two long parallel wires are placed sid ka+mcm lo)lfm,(w.xz-z 1 c:ne-by-side on a horizontal table. If the wires carry current in the same directionzmfml+cm1l ,a:x zw-c).k( o n,

  Two long parallel wires are placed/(rzaxsd*kx gy 9+b9, gy*we b side-by-side on a horizontal table. If the wires carrgxar(s gk+/w9,dz9b y*b yxe*y current in opposite directions,

  Consider two current- 4(r9kgpe1ogd qm9 7nhcarrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the center of the smaller loop, the 9mdegqhr 41 79(ngkopmagnetic field at the center of the larger loop is

  Consider two current-carrying s9j msq5vu 4w0circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other.9vu w40sj5mqs Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle between wzpn.y v w+55nthe loop's magnetic moment and the magnetic field vector izn5y5wnp. + vws

  When placed askew in a magnetic field, a cur1 y1zkkdh)ri,kw 73o2eh1 d./ijncforent carrying loop that is free to ro1fne/jhirki zk7 ) w yc,hk d1o.31od2tate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essexkt6o lcf1km1e 39llj-(zx; wntially all electric motors? xzc(-6el ltk 39owx;mlf11kj

  A circular wire loop lies in a horizontal4:r, yn*pd;1d xqnf gj plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips bel4d:g pd q,n;f*xjr1ny ow the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle ockpy2w2 .d ju-f mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the velocity ofj. wuckyd22 p- the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector c0+m aq-s8+mhex17geza t tbvrm :4.nmonsists of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a straight line. In the following, disregard the magnitudes of the fields. In a velocity selector, the particles move toward the east, and the magnetic field is direc +ez1vmaa nx 7h.meqtb0:8r-mtgsm +4 ted to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uniform mag. n3eh 6. nq y wz46xkjaic gv:tktq(ykf+/,-mnetic field 4.nxq +fy/ktj .va3eh6zw -i :(ym c,tgnqk6 kof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 o*h5bcen+9 z zA in a direction of $30^{\circ}$ with respect to the direction of a 0.30-T magnetic field. Find the magnitude of the magnetic force on a 0.50-m length of the wire.

  What is the force per meter on a strq u hr7o7rx/l wjkh496aight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an al7jrokw qu749/ xrh6 hngle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kg and is in a magnetic fco y3p 7gad eakg4y/95bj+ .wcield of 0.10 T. What minimum current in the rod is needed in order for the magnetic /dagk 7yp5g.9yewbo34 j+cc aforce to cancel the weight of the rod?

  A stationary proton is in a uniform magne*gw5y;az8 0dpilzb6xn se )u6pd)r*g p(n7 gl tic field of 0.20 T. What is the magnitude of the magnetic force on the prot8g7y 5s6 diln6uar0pzx)bzgg)l*p*w (;en d pon?

  A proton moving at $4.0 \times 10^4 \; m/s$ horizontally enters a region where a magnetic field of 0.13 T is present, directed vertically downward. What force acts on the proton?

  An electron moves with a snfn;:er u* dg lf2uffr vc30z03tq 8j/peed of $5.0 \times 10^4 \; m/s$ perpendicular to a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the electron?

  A proton travels at a speeu83gky,2;6phv jb7ztbctc i g;pa f*-l2mog4d of $5.0 \times 10^7 \; m/s$ through a 1.0-T magnetic field. What is the magnitude of the magnetic force which acts on the proton if the angle between the proton's velocity and the magnetic field vector is $30^{\circ}$?

  An electron traveling due north with sxl7sqlzo-9z:iw9gq )g(*i aupeed $4.0 \times 10^5 \; m/s$ enters a region where the Earth's magnetic field has the magnitude $5.0 \times 10^{-5} \; T$ and is directed downward at $45^{\circ}$ below horizontal. What force acts on the electron?

  An electron moves with a speedk: chcuq)i8k 4 of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the magnetic force of the electron.

  An electron moves with a speed on.k6 noj -u9naf $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the acceleration of the electron.

  A proton has a speed of jt5k d.(xgae z g2-.8ghctyn+$3.0 \times 10^6 \; m/s$ in a direction perpendicular to a uniform magnetic field, and the proton moves in a circle of radius 0.20 m. What is the magnitude of the magnetic field?

  A very long straight wire carries a current of 25 A. Whbm/6zh o c(0/u o.wehmwg /c0rat is the magnitude of the magnetic field at a distance of 0.15 m from the h/br (//howm.w 6occg00z e muwire?

  A high power line carrying 1000 A generates wha /5lr7 beucib-haz/ gn(vn7(jt magnetic field at the ground, 10bc b 7z(ei7l -h 5urav/(/jgnn m away?

  How much current must fl.gx , 1gg 9m4ydo6j.chuqlp9txdy;u7 ow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 A is the maut 5c9;edlaj8 hs4o b,8qs,qjkmq 61hgnitude of the magnh8ja 5tb 86oj;q9mquek q,dc1s sl,4hetic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite dq vdd.f0bs. 7airections. They are separated by 40 cm. What is the magne saq. .bf0ddv7tic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currentsyz8y* r01,zbdqfa8jhub1(cd of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wyd1rc, h uqf d1*zbj(z8b8y0 aires?

  Two long parallel wires carry lef qe(+ibki1 ad2:-scurrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the t2(afbq:k1 i e+i-ledswo wires the same?

  Four long parallel wires each carry 2.0 A in the same disn sa0 2ldf88grection. They are parallel to the z-aagsd28f8ns0 lxis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A andole vf7:)uhfm(y d u/5 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetil :y) uuvhf57fdem/(oc force per unit length between the two wires.

  What is the magnetic field at the center of a circn :gfa,oc9xc c6 2w(loular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the:96gfolo2,caxcw c (n wire?

  A solenoid 20 cm long is wound with y,mwgq5 zh*dq.b (q)t5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flows w )qqh z*d,(byt.5qmg?

  A solenoid with 500 turns is 0.10 m long and carriesvkdszc-o b 1h8zex9)wk3, ba :k ph.z+ a current of 4.0 A. What se zsxkkhak o-z9w3zp1)v,h+ : b. cdb8trength of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm lotwchn6 j7v5 owfiw v1; )v2kmmnv7 -0ang to generate a 1.0-T magnetic field at the nwk12t- aomv7f mnv)c 75 wwvi6vj;0h center?

  How many turns should a 10-cm long solenoid have ift)45y btju 2skvmx9r2 oi) a*b2eq8zf it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop b2bri)uts +/r e x;e6hof 120 turns that carries 6.0 A if its dimensions ar 26bsi x);+ehrutbe/ re 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magce;75wv) lki unetic field of 0.30 T. The current iw7uvice );lk5n the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-uba+ibuey 1 o 8md((z-sectional area $0.12 \; m^{2}$ consists of 200 turns, each carrying 0.50 A current. It is placed in a magnetic field of 0.050 T oriented at $30^{\circ}$ to the plane of the loop. What torque acts on the loop?

  A circular loop carryy3.yyyl1u x r4ing a current of 2.0 A is in a magnetic field of 3.5 T. The loop 3y.ur41y yyxl has an area of $0.12 \; m^{2}$ and its plane is oriented at a $37^{\circ}$ angle to the field. What is the magnitude of the magnetic torque on the loop?

  A circular loop of wire of;13lek h5qo-v( otkqu)exmx - radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is paralle mxhk-qv1 ;3el et-ou(q5kxo)l to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field o f)tuxw4fn) +wf 0.30 T. The t)wx)u w4+f nfcurrent in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of ,efw98ra5p lw s /omh(+vz x,parea $0.25 \; m^{2}$ carries a current of 5.0 A. The coil lies in a horizontal plane with the current flowing in the counterclockwise direction when viewed from above. At this point, the Earth's magnetic field is $1.2 \times 10^{-4} \; T$ directed $60^{\circ}$ below the horizontal. What is the magnitude of the torque which acts on the loop?

  In a mass spectrometer, a single-charged particln .g iteuxw*7 baes/45e (charge e) has a speed of $1.0 \times 10^6 \; m/s$ and enters a uniform magnetic field of 0.20 T. The radius of the circular orbit is 0.020 m. What is the mass of the particle?

  A doubly charged ionz1 yg7e:q eb;7s oapxqs*1gs 4 with velocity $6.9 \times 10^6 \; m/s$ moves in a path of radius 30 cm in a magnetic field of 0.80 T in a mass spectrometer. What is the mass of this ion?

  A proton travels through g jhc nt;y-qfl:sf )q13(b 7aua potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resul y;)jq( t1 3ubc:n7qgfafhl- sting orbit?

  A proton is accelerated from rest through 500 V. .)6v/g zb4w7og7u) uyjzyodhz a (be *It enters a magnetic field of 0.30 T oriented perpendicular to its direction of mot)7y4ugd6bbu z*z .7(h) / zvwoeay jgoion. Determine the radius of the path it follows.

  A beam of electrons is accele3 itjo6k mh+i)tw9c/(bxrps+ rated through a potential difference of 10 kV before enhr+i w39cjtxot(p/ + k6isb)mtering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?