If the north poles of two barhf-3 e(8z33 xtmlnrzt magnets are brought close to each other, the magnetsl3nrxh3e8t - zzmf( 3t will

  If the south pole of ones vaptwms*8j872h.se o k a53pfu: .ll bar magnet is brought near the north pole of a second bar magnet, the two magf 8vjoe7 whpmsut3sl 2.p5aka ls.8* :nets will

  If a bar magnet is divided into twl2:d9t,-lak 5pu pln jm/teq7o equal pieces,

  The Earth's geographic North Pole is 8 6zfyrd jibx1(5izp4p1 d4 eomagnetically a

  The south pole of a magnet points toward 3enz 0zy5nn+a the Earth's

  An electric current prw)6 jv so x8nnj6ez+6w t.e7sdmpm7z:oduces

  Which of the following is correctv;n,unj uo500p6 x c*oqxl d+t?

  A vertical wire carries a current straight down. To the east *mnehm zzg1 h6y -v4h(of this wire, the magnetic field pointsn*( h1yzmzem v-6 hhg4

  A horizontal wire carries a cuhv tofp //0n7hrrent straight toward you. From your point of view, the magnetic field caused by this hnh0 v7fp/ to/current

  A current carrying loop of wire lfhvt0 6,60wzn5z3f . bwon ykries flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. Whatv5o.6fzyh0 , rk6bwn3tnz0wf is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table to xl 0xl knxewiz;8s(9)p. When viewed from above, the current mov)lzike;sx0 l nx(x89wes around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field2x6 6 fccdp+pt is the

  1 T is equivalent to :kwm sxwmj)j. t55cf9

  The direction of the force on a curre (e sv 553ivlg3h2kztgnt-carrying wire in a magnetic field is described by which of the sgtv3g5vhezikl (2 53 following?

  The force on a current-carrying wire in a magnetic field is wz0pglbsh :p0 /5xv5vsd 4mi/the strongest when

  The force on a current-carrying wire in a jsg vbb :;l1 e*ngbespqx*1x ,d:f1t7magnetic field is equal to zero when

  A vertical wire carries a current straight +(2b, sq+mqog /b;p: cgdtfjw up in a region where the magnetic field vector points due north. What is the direction of/ gdqo s2jbp(bcgt :,qf;m +w+ the resulting force on this current?

  A charged particle moves and expb/h+tl; ( vbhperiences no magnetic force. From this we can conb ;bp ltvhh(/+clude that

  A charged particle moves with a cpf+ t;)owd)+d b1bzmhonstant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upzb1wf o+ h)db)md;+ tpward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetwyz5zj g. nfz77ss j6st-ew bf9t,d +hw5h07fic field. The magnetic force on ,g7ws.wssy e 5tf+7h-9 5ftf7jdzbz h6n wz0jthis particle

  A charged particle is; w.ew9pmjyd( b*;sz(xx1vc d injected into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weic mxv (;ybx.sdj (dwp1e9* ;zwght, the particle will

  A charged particle is observed traveling in a ci ok4x1prxa9oi6 x,4r77d jhanw. ql7mrcular path in a uniform magnetic field. If the part.i174 w d xpan hojr x7q7ko9ax,6lm4ricle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travell zb+8-d5 evjwe 9pyfr 614bwcs in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been4w9b1+wpely6 e j8 rf5c-vbdz

  At a particular instant, an elpob2r0mlzo,qxf c. 0sg:: jb2ectron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that af,blbo:20.qgxm2 r co0sp j:zcts on it is

  An electron has an initial velocity to the south but is observed to cur fw,r4: b9+ng;nyr ejqqr gl19ve upward as thefb yr;n+9g,rn:lrq1w4jq g9e result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +q)- e(7(,ortgy/,lm nmk()i: bxra sf3uoxlpx 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 rigm,x) )m a3si r -opn,kfuet((llr7(qx/yobg : ht, +y up, and +z out of the page.)

  The magnetic field produced by a long straigv3 9n,f:aqal* e bxqhyc:-8sa ht current-carrying wire is

  At double the distance from a long current-carrying wire, the strengthpn*( 9d5.jfic),j lswnyl fj+ y uh;,u of the magnetic fielj(n9nup*,d sy.ffijc+lw)lhuj,y ;5 d produced by that wire decreases to

  Two long parallel wirev/+dvl2. esncrq .k7ys placed side-by-side on a horizontal table carry identical size currents in opposite direc+er ck qv.yv7s 2nl./dtions. The wire on your right carries current toward you, and the wire on your left 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-side on a horizontal table cati +s297onpgsk-ieq1c8 7spkf k 6pl 4rry identical current straight toward you. From your point of view, the magne 4+oknpqli2s7 c 6tskk1sfg p8-pe97i tic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The uxzmm+5h :om. magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magn. xm:oz+mh5mu itude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towardflj7zzui*v8c6pk 8cd1g :um8 the east alongside and just south of the wire. What is the direction ogzcu17z vkcpfum86 :ld i*8j8f the force on the proton?

  A wire lying in the planeahimq vb6rdrn- 2;kg7ef (,uq03qx (n of the page carries a current toward the bottom of the page. What is the directioni(m(xbhr;uk7 3n- 2g6 ne,v0fqqadqr of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placedzi+/k3eyhic + side-by-side on a horizontal table. If the wiresk h+y +izeic/3 carry current in the same direction,

  Two long parallel wires are placed side-by-side onibsaii l kau. 2kmc094z8 afg.y*im)- a horizontal table. If the wires carry current in oppos8iiib-4l a )0gay 9zuk*mi.fk2a.cms ite directions,

  Consider two current-carrying circular loops. Both are made from one strand o9whs5c w:p.c v 59an hcb+oq+rf wire and both carrvw:+w q 9chc5rna 9.o5b hp+csy 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 magnetic field at the center of the larger loop is

  Consider two current-carrying cir l/vv u j-shyn35h p*pkhbr5.-cular loops. Both are made from one strand of wire and both carry the same current, but one h y*lb.up5- j3v5-p /shhrkhn vas twice the radius of the other. 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 o534 bc5ush3tcf hk 5kbvr/ fwf-/2ysaccurs when the angle between the loopktkahus2f / 45sf3h-5b b f wr5ccv/3y's magnetic moment and the magnetic field vector is

  When placed askew in2u6gerr/qu: 6t e.llz a magnetic field, a current carrying loop that is free to rotate in any direction will experience a tlrt6r6u2 equ.lg/:e zorque until its magnetic moment vector

  What fundamental fact underle8uxiohn d )jp0u71;jies the operation of essentially all electric motors?ho )1pu0jj;i8nd xu7e

  A circular wire loop lies in a horizontal plane on a table and carr+m)+a turplcdr3(g7 v,xw+ qy ies current in a counterclockwise direction when viewed from above. At this point, the Earth's magneticq+rwlta+ 3)yr7p dc(ug m+x ,v field points to the north and dips below 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 parl2;- - bl p :x8kxknyrzc5-aoeticle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B lp-x e2kzark b 5-;y8l-:nocx, where it is deflected in a semi-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the velocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle 9 (fdu6+r7zk gpd/xcipassing 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 thed/79pfg xd+z6( u kirc following, disregard the magnitudes of the fields. In a velocity selector, the particles move toward the east, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is *jj1c*pxs7t:mvat)e oriented parallel to a uniform magnpcjts xe *jv*7at)1m:etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direc z faxv4h8b g0d. 3ppizf):m5vtion 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 straight wire carrying 5.0 A when it is otes/e;2w ut-+eh4 cd placed td tohe/s- w4e;ce2 +uin a magnetic field of 0.020 T? The wire makes an angle 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 a5masnxtot2 d2* fk: ;h magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of tkdx2n 2oth;5tm:* a sfhe rod?

  A stationary proton is in a uniform magnetic field of k2e gbhzd4k 7:0.20 T. What is the magnitude o47h z keg2dkb:f the magnetic force on the proton?

  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 sxu;yelds 5k -bgx) p-2peed 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 4k,red5izdfaqi uptg *;:hz,mr:; y(xt )sg7a speed 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 n ,lykbo2pw92iorth with speed $4.0 \times 10^5 \; m/s$ 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 with2ousu8pc . is+ a speed 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 sp (on:fl+v .nkyylvbz04 qe,4lv :u.xoeed 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 acceleration of the electron.

  A proton has a speed of o7qp3o:s3 uffhy db3 hve10q)$3.0 \times 10^6 \; m/s$ 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 v7ngr v f2x ,knq2-qp/wire carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from thvf/ qp2-gn,rn7 xv2kq e wire?

  A high power line carrying 1000 A generates whvqeh/l0.e b;b at magnetic field at the ground, 1vqe/.bel ;bh0 0 m away?

  How much current must fd / fms;j1zwatxi( ;j/low 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 cx*v je1r2kyz. urrent of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Eartk vy1zj.e*2rxh's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires sqwnvl4yh3 rp9 fo-3 (92ueoscarry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetiure4s9h s ylow9v2-o pqn3 (f3c 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 currents of 20 A and 5.0 A in opposite y.kf-b9zsn j jw,d6d(directions. The wire.d- 6 w,szkb9 j(fnydjs are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.g65n kix.;wff djp8 w)0 A in opposite directions. The wires are separated by 0.20 m. At what point bewfk8g.jid w5f) xpn;6tween the two wires are the contributions from the two wires the same?

  Four long parallel wires3i xz f0 fw(s.)-umjtp each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. What magnetic field w .mixp3-(t 0fsujfz)does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the oppo yee2q19 0kc.rkbbt.hsite direction. The wires are separated by 0.30 m. Find th 2ke9b0ty bkhr.1.qce e magnetic force per unit length between the two wires.

  What is the magnetic field at the centeraz9w9 h5; /ps4+yuvpq ey3k z r-ldc,p of a circular loop of wire of radius 4.0 cm when a current of 2.0 rp,se; q z-uvkp/p 9w h5a3l9c zydy4+A flows in the wire?

  A solenoid 20 cm long is wound with 50001k875 )mug-ts jwzt z0e5flmm turns of wire. What magnetic field is produced at the center of tu7k5smz j w8t0)me5 gz-f1mtl he solenoid when a current of 10 A flows?

  A solenoid with 500 turnsu4u2vv1efjp0 r 2(ckc is 0.10 m long and carries a current of 4.0 A. What strength of j2u2f c0er4 v1 upkv(cmagnetic field will it have at its center?

  How much current must pass throug4hqy ( jcs45/tr/gzgr h a 400 turn coil 4.0 cm long to generate a 1.0-T ma5c4/gj sgqryzhrt(/ 4gnetic field at the center?

  How many turns should a 10-cm long solenoid have if fal +hos0(um1 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 of 12 jc(kpvn ,b tb0bdw( (y//eii)0 turns that carries 6.0 A if its dimensions ck(ie( 0)n dvt,wj pb(/biy/bare 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform maummo1d58.r6xhms,*e2v b5f7t de c ksgnetic field of 0.30 T. The current in the loop ,.5fdex6svmrhe7smdu5o c 2m *8btk1is 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-t(nbb(qaazm, w;rx 9- 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 carrying a current of 2.0 A is in a magnetic field of 3.5 T. Tto,/bz4gu hb n1tu5p)he loop has an areu1bzh5 pb4)togn /tu,a 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 radius v*59, z8 jz lv/2k(clu epmihp0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Wha(jz l,ep 9k liz* 82umphvc/v5t is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unifc3 -5yfl2jrgj0 d sn v*ei0h6sorm 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 3d gij0y-256j*lhs0 vn serfcloop is parallel to the magnetic field?

  A circular wire loop of area csxn 5jadg4aw i+) 56a$0.25 \; m^{2}$ 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 particle (charge e)xvg)3 j8 3x43y6lvmyb ;iipl o 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 ion with cyju)-7gxl c;:tyz x.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 a potential of 1.0 kV and then moves into d enuq4 ++g/vaa magnetic field of 0.040 Tv+g ae+q4/und . What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a mbe52 ztt.o e9nagnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius o. no5te9ezt b2f the path it follows.

  A beam of electrons is accelerated through a potential di.mi by4z l13o34-1oxetmehoc fference of 10 kV beforeeoom 4z-teh.b4 31l1c3x oymi entering 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?