If the north poles of two bar magnets are brought cloif3q7 ae p4bw-se to each other, the magnef a7iwb-4 eqp3ts will

  If the south pole of one bar magnet is broughte* )vvl,w +auios:,lj near the north pole of a second bar magnelvloj ai,s w+*u, v:)et, the two magnets will

  If a bar magnet is dividv h:+k51vmdnwed into two equal pieces,

  The Earth's geographic Northje: ytaa-dwbka 61,tvv4 v30w Pole is magnetically a

  The south pole of a magnet points toward the Ear,qju *t4n dkl.th's

  An electric current produce,lzh6fg* eq,ldk3n/ 97d,s yez y0;ig vvt p(hs

  Which of the following is crr) 3hh9c c(okorrect?

  A vertical wire carries a current straight down. To the east of this wire, hf 7br cssrl,m5x6 q71the magnetic field poi qcrx7rfb1 ,h7s l5sm6nts

  A horizontal wire carries a current str:ohsvacp0v. lw/* geh(cc n-d7qc,xs 0z9 xl* aight toward you. From your point of view, the magnetic field * shd wa7o0zn0* xlh v/e:.,c9lg-cpcxv( c sqcaused by this current

  A current carrying loop of wio9z-)ie:va)o b x b8 eptje*h,re lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic fielozeeoab e :i)-h)v*9bp8t x ,jd caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When v/vt e-af b *j(wigvd9(gt2j;y iewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the m(jf 9v2je-/wgidg; t *(vbaytagnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is ivh9* ,rbiy;iy ik3v 3the

  1 T is equivalent tot7 e tt/vnqs1)

  The direction of the force on a current-oys+yukn 3i(-carrying wire in a magnetic field is describin3o y+ (-sukyed by which of the following?

  The force on a current-carrying wire in a magnetic field is theh.ggv4vc-o( m-xmk 7y strongest when

  The force on a curre2f5w4 tt1 u tjl..hzewnt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carriesfq+ ;ej4.:+v nt6k2hgm ch s.r 2aqkhb a current straight up in a region where the magnetic field vector points due north k r s.2;hqec 4h.tvqm+k2fn+:b ajgh6. What is the direction of the resulting force on this current?

  A charged particle moves and exib*m uq) q9yx/periences no magnetic force. From this we can concuqb*9 /x) iqymlude that

  A charged particle moves ykwp7wy 0*2 ieg1i+h uwith a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magneticgyi1*02 ewky+ 7 iwphu force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The m*h i+34j 24l 5jmxns f grcsc.1hkwt4fagnetic force on this particlgj3i* 5jtfwl c4f1 n4mc+ khhss.xr 42e

  A charged particle is injected into a uniform magnetic field such that8lz/irbr(7o r+cok+v; lgo ) hc 5/imy its velocity vector is perpendicular to the magnetic field vectohb gmr cl5 ro 8+oi;ycz/k/+( 7ior)lvr. Ignoring the particle's weight, the particle will

  A charged particle is observed travelingcy,f1- w f28e h.q(.zcwkahoi in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular patecw-h2ok1a .ywihc(zq,8f .f h would be

  A particle carrying a cha 6/rs,fb gu4ch/zrtz i8-r8gq rge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius i ,c4grrqz8t-/ brz8/fs hg6uof the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniform magnddc jih qf2k f-8;i9u+l9ein6 etic field that is directed straight downward. d i+6u;k9d-2 lihnifeqj8 c9fThe magnetic force that acts on it is

  An electron has an initial velocity to the south but is observynlm(/e 40 yv4r on esa+:ydc+ed to curve upward as the result of a magnetic field. The direction of the magnetic fi4:o4s ee y +rn/cma+0lydvyn(eld is

  An electron moving aago ia3 2skzkz m*9v.b- gjt :pw-)e7ulong the +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 o jp.e- u3)t2a*ws iob9mzg-az:7kgv kut of the page.)

  The magnetic field produced by a long straipga-6x7 jbqpq1 9m.d74n jryi ght current-carrying wire is

  At double the distance from a long current-carrying wire, the strengout su. cvh/0c7szkp2xni-4 )th of the magnetic field produced by that wire decreau/oxucsz )cikvh.7-4 ns tp02ses to

  Two long parallel wires placed shz,m 6 ei jtn+ aqs7;8hek,)b7jme0fmide-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward yiehkq,,mm s86f0+be ahj7mzte ; )nj7 ou, 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 hori (peqzwkg9h .4yi 4f( 6hfc(svzontal table carry identical current straifv 44hiq(fk ( s9g(eywz.hp6cght toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude 0ztm- gxvm4mx* q1 7g tpvtw6:of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of tzxv mg:tgm7qm4x1t0 v - p*tw6he new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward theapk gdyi7p9p3/+s; w p east alongside and just south of the wire. What is the direction of the force on +spkd9;w/aigp ypp73 the proton?

  A wire lying in the plane of th q,bl9eoik+2 py w0huvf 1bg99e 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, also in the plane of the page,,b p b2fivh9ko0l1w9 9 q+uyge from your right?

  Two long parallel wires are placed side-by-side on a * 8isjle9zjdr:bn:cw .b g16thorizontal table. If the wires carry current in the same dirj.:g6 9bbsz*twd nj18 cl:ire ection,

  Two long parallel wires are placed side-by-side on a d6uy-sftlh6tu/jpk vr9p x5c1: ;(thhorizontal table. If the wtx(phj/u1tt6 s lv9h:5p-c ;6y d ufkrires carry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from o34 *gi:t4ig.qy6 flq ywq) sfzne strand of wire and both carry the same current, but one has twice the radius of the other. Compared to lyq zf.i)gy t46qf:wsq43 ig*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 circular loops. Both j3 s 6t;7pya.u;.xvg wzuhn2d 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 moment of the smaller loop, h a.j 7z.6gy s 2xvpunt;du;w3the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle between tjuqf*p,/sj66 qvg c g+he loop's magnetic mome j+v6/uqc,6gjsg *qfpnt and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying lohq*( zg 9ccg)h.d3 rzoop that is free to rotatec 9z*rh.dqz)oc3hg g( in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially al-qozifle3y cxs+,+oa.p8vl dp+6 s/il electric motors?oicy+6s xf i +3+l.szqv/pod,l- 8aep

  A circular wire loop lgomkt1ya3c6/ ies in a horizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magneo gt/6y1kmca 3tic 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 particle of mass m and p,nk h55h (l:aprqe r7sd9q -echarge 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 of the particle. Derive an expression for the m 7ae:nrr,qk pq 5hle5sp-hd(9ass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through cross8i3s eh2;v(n lbnn*qfed 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 m(n f ;3*q ei8lnsnb2hvagnitudes 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 oriented parallel to a und i-d 69,ygqne nh2nfz,64ld siform magn nh4n- z9d6qeyd6l,,s2ndif g etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in0o7a1ai 1 vk3( fsmcdy 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 straight wire carrying 5.0 A when 3-r d5c*bm gniit is placed in a magnetic field of 0.020b-igc*3m n 5rd 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 a magnetic p-w4gw v*joh)bwy64; cd2n9hpggl a +field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rodby6+whpwa4l- doh gggpj4 cnw v9*2);?

  A stationary proton is in a uniform magnetic field of 0h2vzvi9m) o0 f.20 T. What is the magni )0o9mvvi2 hzftude 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 speedgg,pv jc1x6g4 o+t 5hx 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 -6+ftpww qruy yeq. (*a 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 u,jb 2:rbb..zfm1sggr;k3 lze oi uix3.f):r north 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 with a speed bz 4pgv)yr qx ; eq41ekrlspva)27)i.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 wit4vcoc q54 tx:c8 zm+tgi /e3vuh 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 8hz pmi olokud 9l/us i578,8t$3.0 \times 10^6 \; m/s$ 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 q13msm xaac7obhrp*83a ; i f,current of 25 A. What is the magnitude of the magnetic field at a diahsb7,rxfm*8q13 m a aio;p3 cstance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnyv 5ojttmrqx )am1)y 9d(x4fhx 10le1 etic field at the ground, 10lmf(t 1)tdym5xvx jea9 41o0h1yqxr ) m away?

  How much current must flow for x zs4,zdf(z7a4h zf- qku/o3rmk z1)y $1.0 \times 10^{-3} \; T$ 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,-lq6wkin y6 g fk:v jxq.w)7mgip:;r.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Ep l:x76,rg q - ;i kgvfwjk6:)iqw.mynarth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They arc.z p 6 nd79ri 1n y4.ttqurjzo8it.9fe separated by 40 cm. What is the magnetic field in the plane of the wires p49nn.ft joc6 .tzutzr1 .98q7yidri at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carz2p.ml u.jd 5y3 aqplkbk v6l*u;ko:5ry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betdmoublkla 3pu: z2p5;l * ky5qjv6.k.ween the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite jz wdokgww jn..:x,uxh:,l on trn,;f; j)))l directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions frwzlr.n., wt nxjxofwdh;oj)j,u),l: kn;:g)om the two wires the same?

  Four long parallel wires each carry; 3iif gtrx;:sn ./zp9ws8 adx 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 positiwi9ta:rg .nxp ;/8zixss;f3d oned 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 and 8.0 A in the opposit9pky2v x , l)q8psnqu1e direction. The wires are sepunq29)lx1k y , 8vqppsarated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circulam kdd1s*gu:q/r loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wirug*s/1:kd dq me?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field ish2yggf.wh) tl p2q5z6 produced at the .2l ftg65zpwqg)yhh 2 center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a curren,owo nz83. cxht of 4.0 A. What strength of magnetic field will it have at its centn3cz.,x owh8oer?

  How much current must pass through a 400 turn coily /70bk+x+ hf6sl iccl 4.0 cm long to generate a 1.0-T magnet/lclfhs k60b+cxy 7 i+ic field at the center?

  How many turns should6wprrv sm+ w87 a 10-cm long solenoid have if 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 ldwz v90/2l*m2n6 5 ,;qt cebpb*lvxaen4nelcoop of 120 turns that carries 6.0 A if its dimensionbb9*wn5 t,; mxevnv0*p ll6een4/ 2z2ca l cqds are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a un;7b 0doylc d(hiform 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 perpendicular to the magneticdlbyc7 ; oh0(d field?

  A circular loop of wire of cross-ser3s+;zl7s8gzbkw)ssg mx 2f: ctional 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.m g p5u5u.mau)g //mzo The l mm/muz.a /p)5 uu5oggoop 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 fg 8 /koh *cidw yt3i/h91xx:tin 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 parallel to the magnetic :gtdwo9 i h1xxt /8k*chyi3/ ffield?

  A circular loop of wire of radius 0.50 m is in a uniform magnh6ql+ /.iunf ketic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of kl/fq+i6 u.nh the loop is parallel to the magnetic field?

  A circular wire loopn) +s(b wa5 ytj/0bgnh 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 particq f2v-9d)q1h o jrl9iele (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 ion with velocity +uf0zw g m8o/m$6.9 \times 10^6 \; m/s$ 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 potentialn6q9i,jlk.g h:vnr p5 of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting ,nrh5:i.n g9vjl6 pkq orbit?

  A proton is accelerated from rest thgoya/x2fvzj9 (f qx2( rough 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion.9f vaz(/q(xg xfy2oj2 Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differen k.w2t- )rpmtxce of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what r )-mt.w2pxtkvalue of the E-field is required if the particles are to be undeflected?