If the north poles of two bar magnets are brought clwy ltm 6 )hz v;ge yphy0m6c86o6mft.y*s b29jose to each other, the magnet*ste.ymyywvh0;mc8b jpgz l26)mf yh ot9 666s will

  If the south pole of one bar magnet is br3xo unk3wh6m+l)( ewg0y;ju z43lsq bought near the north pole of a second bar magnet, the two magnets w0mb 3j4; yn( uq6l3+eswk wgxhu)ol z3ill

  If a bar magnet is divided intd uiias m6y0.x2fv s5(m;c mq6o two equal pieces,

  The Earth's geographic North Pole is magnetical65oq.)s9u ugj) iuaa oly a

  The south pole of a magnet points tnc4 xh(me-t +boward the Earth's

  An electric current producessam*v32 lz/qh p2cqeiu(p b*7u(lhb:

  Which of the following iir9h9 3q rj9pus correct?

  A vertical wire carries a current straight down. To the 7 gy zjo77hmds4 ug8a:east of this wire, the magnetic shdg zu7ya4m:8o 7g7jfield points

  A horizontal wire carries a current straight toward you. From yj h8*6q4fdrz ukoy( n5our point of view, the magnetic field caused by this curre qj8zkh( nd r4o5uf*y6nt

  A current carrying loop of wire lies flat on a table top. When viewed fr2u / a5xwba4h u) gk5mx 3y:(vjmuhg.iom above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic fiel ih 34u /.5)amgx(2a u:j 5kyuvbxmhwgd caused by this current, outside the loop? The magnetic field

  A current carrying circular lz l6+uff6-wuhy nj7e,oop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the fn6f6 7+w,u hluj-yzedirection of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiela tkzkp1 vq* gc9 81t3x5w:jhzd is the

  1 T is equivalent to +s5 crqimn;cmhf8:st ; 11isj

  The direction of the force on a current-carryin c1ve/y 5sdqw8/eb-gwg wire in a magnetic field is described b5qwc1 e -yved w8/bgs/y which of the following?

  The force on a current-carrying wire in a magnetic fiej cyr6qm((2pxhkdd 06h51t5vtx sit0ld is the strongest when

  The force on a current-carrying wire in a magnetic field iu+1ahid,kpsk ; 3 9kbis equal to zero when

  A vertical wire carries a current straight up in a region where the magnetic fm-nu2i k5:x uyield vectnx k:u m-5u2yior points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. Fjx (g pm2aw9,lrom this we can concmxg ,al(9pwj 2lude that

  A charged particle moves with a constan pxy nrgu2ar5 2(ac7.k,;sjzot speed through a region where a uniform magnetic field is present.2y27gz jksn5p,o aurc.(xra; If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across anxq36te5d ;lv constant magnetic field. The magnetic force on qnx36 evdl; 5tthis particle

  A charged particle is injecln mtj7u,, ou)3:s qiwted into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wilumu3n,s7 t: ),ilqj owl

  A charged particle is observed traveling in a circular pathgb4y4; *h;mvwjt jw2p in a uniform magnetic field. p4;wmg2byj*v jt h;4w If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a cirksma7m 4 d i qw8vz+s:1ujuuk9 p2f1,wcular path in a uniform magnetic field. If i4 mia81u wuu zf, d2wvkkjp+7m9sq:1snstead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastwaa3atjcp:+tc1iqo /f)rd at speed V in a uniform magnetic field that is directed straight downward. The magnetctqc3/) i1a fp:oatj+ ic force that acts on it is

  An electron has an initial velocity to the south but is obuep 5,cgrtj)5j23ulk served to curve upward as the result of a magnetic field. The direction of the magnetic field e)cjuj r,g3pt5 25ukl is

  An electron moving along the +x axis enters a region wheroe i dvb; o8-s*a 1c,yb42chhve 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 o2vyecd8b4h, soa1vi;-o * bh cut of the page.)

  The magnetic field produced by a long straight current-carrt,l d,d+ b1taa e(u;okying wire is

  At double the distance from a long current-carr8 ia mi ca4h4.ywhm34qying wire, the strength of the magnetic field produced by that4a3 hy i8aihqm 4mcw.4 wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table oc 1hok2 8m4mus 3bu5scarry identical size currents in opposite directions. The wire on your right ca3 h4ouo1suc825m b smkrries 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 jg) 5mkk7v8bg-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between vbjg5k m7)8kg the two wires

  Two long parallel wires carry equal- v/mdk -eywplp9oojh506rm- currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is thh0yj 6eo--kr 5 v-/9plwdompme magnitude of the new force between the two wires?

  A long straight wire carriesy uppe4. kfj9; current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force opk4j;.y u9fe pn the proton?

  A wire lying in the plane of the page carries a current toward the botth imwd3( ny.*som of the page. What is the direcdm( sh3i*n wy.tion 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 placed side-by-side on a hzm85al88/fcl m8m rwzf5fcj i8: o/ssorizontal table. If the wires carry current in 8858rw8 flflcm m/i8zcfzs :js5m/a o the same direction,

  Two long parallel wires+jmo +ry,:faw are placed side-by-side on a horizontal table. If the wires carry current in opposite dw++: mrj,afo yirections,

  Consider two current-carrying circular lon2-xse vzh v--;ghasi/m: 2vvops. 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 ma;mexzh2hsvgi /v -vn-: v -2sagnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strand offlix /o pk-i,8e/ yy8a wi8f8i/i,/yxl- a o kpeyre and both carry the same current, but one has 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 occurs when the angle betwg:*,2m hblyrk d2 rub.een the loop's magnetic moment and the magnetic field ve , rbdu:rbkg*hyl2.2mctor is

  When placed askew in a magnetic field, a current carryqk d0s j31 nc/xs(otpp4**(kro m+x aying loop that is free to rotate in an s(royq*tk d/+4xo spk (j1na*xm0pc3y direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentialh/e (0: pacphf5 t6c7l gtm 4mudrem;*ly all electric motors?0me ;h76a/u d*cfmh gp:tp m rl5e4t(c

  A circular wire loop lies in a horizontal pf;ln2)ahu5wx lane 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 below the horizontal. Which side of the coil tenduw2al;5fnx h)s 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 of mass m and charge q ib276,,+xqke hako oi 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 of the particle. Derive an expression for the mass of the particli, hkkoxei,62+7oqab e in terms of B, q, V, and R.

  A velocity selector consists qib 7b6p xn;,a( uo:a :gudgbtiyi.6; 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 movx6bn utip76,ga :(du o;iybi.:ga;bqe 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 oriented parallel to i*9oep4y0fa9) lexmp a uniform magnetic 9mp*leix0 o 49feyap)field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direct*cq qxl1fr8x lxdbf8b5,s) (pv fj,1iion 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 gwhaty c* gl4s83 majv76x5f +on a straight wire carrying 5.0 A when it is placed in a m8ax agy wtm hj4c*f7g6 35vs+lagnetic 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 l :w4 *lyhkz2dtong has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in orl:d2w yhzt*4 kder for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fie(9j z9atk ie4 ip1akrlq/h53a -bdz q9ld of 0.20 T. What is the magnitude zpk( 9t zlak1raid e5i4h9abqj9/ 3q-of 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 xgi/8pbbt:x qii- zwe 5yo)3+kd3+onspeed 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 speedxkpxi /siqvnu3s88zo989+nq ::mvs n 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 wtv5+ k wf/rn:jw68jzmith 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 with a speed of 6td 0az6 hqi3qk/2olc$8.0 \times 10^6 \; m/s$ 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,(q7y hnbsu. c 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 acceleration of the electron.

  A proton has a speed of j40q42souy wt$3.0 \times 10^6 \; m/s$ 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 carr8ddgnt 5v-vnr9.(-qny2 smuq ies a current of 25 A. What is the magnitude of the magnetic field at a distance-nd.tr2n 9 gv 5-qsm8n qdyu(v of 0.15 m from the wire?

  A high power line carrying 1000 A geneyo7p5d r/ ;o3l/henq,6blg0w9dh zwc rates what magnetic field at the ground, 10 mhl 36wz/g o dn,q e bcl0;r9phd5/7ywo away?

  How much current mus:k74 z0f6dxbqrog )x gt flow 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 c .m-+ y(heamff79qqs2wnr0na current of 5.0 A is the magnitude of the magnetic fieldqya ff-7nher(2q9+ mm.ns0w c 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 carra jo; 3y8s4k rsbsgn+bd +elxum-5)1ly currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from thgokr4jd- 53;yls)se8sa+ xlbn + bum1e other?

  Two long parallel wires carry currents of .,;h;9bje5qab/ qpx+ fz w0yx c6bu wp20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the twoq 9; b0xfqc wajh;bxp5uey/p., z6+w b wires?

  Two long parallel wires carry currentuho )nwc1 vd6uc 0h.6dn dyv;0(ua/sm s 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 hudoa; 0h n us)ccd.0v6n(v6w1/umd ythe contributions from the two wires the same?

  Four long parallel wires each carryi 5g:; 18aqbhfo)1etczztw 5 p 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 does one of the wires experience due to the other wi5 bgt efiqocw11zhpat :)8z 5;res?

  Two long parallel wires carry currents of 5.0 A aj1grm dmiaf s;rd 07)4nd 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between;j)rmfg ra m0d14ids7 the two wires.

  What is the magnetic field at a29 5.o-pg tzge hthw;the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in 5o;9g gpht hz-.ewat2 the wire?

  A solenoid 20 cm long is wound with 5000 turns of w/m+ xl0dsmp )yire. What magnetic field is produ l0mx)s /dpm+yced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 lle hnug kt(a76*2h :eA. What strength of magnetic fie:t*guk 76(e2la helhnld will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a 1.k.zf dr+1z5hp 0-T magnetic field at the ceh zr. df51kpz+nter?

  How many turns should a 10-cm long solenoid have if iz5cbd w +ts;-sekj f ux,9j(/lt 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 120 turns that carries 6u:qvou7v 3pd654xug t z76oea.0 A if itsaov6eztqoxu7 6: 5p74udvug3 dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of ( lfz+mu6af.b c c/v6z*j(htn0d*fv s0.30 T. The current in the loop is 2.0 A. Whztu( mlhcfvz.+jb vf c(60anfds *6/*at is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional arkm70vletx* 9zlpje*6 ea $0.12 \; m^{2}$ 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 figqt/i75mi *9r. kw pkzeld of 3.5 T. The l7 gw9r.kki *m/iztqp5oop 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 radius 0.50 m is in a unifodl2b--ma; z apm/3m narm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the ma bmap--m3 l/2danamz; gnetic 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 uniform magnetic fieeq6-:ymx vwg3x mxaxd9+n8l 0q1ac0qld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque1xgqx:qx0na-ylq+ m9cva8d6 0 wx e3m when the plane of the loop is parallel to the magnetic field?

  A circular wire loop 0 *iybtgk ckc y wk97idw8*f,v wj5.r7p,lko*of area $0.25 \; m^{2}$ 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) hasef:j5g) o/:krrz mbo3*rox5b+y n wk) 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 veloci9kta p2l( dr5:lmdb + imt:b.sty $6.9 \times 10^6 \; m/s$ 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 a mderf*4a y trl(s6kc:0 agnetic field of 0.040 T. What is the radiu cr(flsa64yk rted0:*s of the proton's resulting orbit?

  A proton is accelerated from rest through jv9 hcc/je;k)500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of moti/) vcj k9;jhecon. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference n /gkrwnatp- lt-8jg0vn7,rmk) d:5c of 10 kV before 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 pa7cj) kdknnntp8- g,: wrl/5 tgv-a0m rrticles are to be undeflected?