If the north poles of two bar magnets are brought close to eacr6w;+h f1aj tkh other, the magnets wijt h6a;f+k1 rwll

  If the south pole of one bar magnet is brought near the north pole of a second bst :*f q8+soduar magnet, the two magnets wil +o8uts*dq f:sl

  If a bar magnet is divid)xnd3hbhcc)o lu lifd 9m +n33,j0 3iued into two equal pieces,

  The Earth's geographic Nor:i/n -y.z8d3rmi*kws1ai o csth Pole is magnetically a

  The south pole of a magnet pt:ou5nxo . k2oxfz6n1 oints toward the Earth's

  An electric current prode8i c+dl03d 8 2pkuxteuces

  Which of the following i* pu5jjtw+bleamn6-+s correct?

  A vertical wire carries a current straight down. To the east of this wf7+me ju5i wa5,n qeb+ire, the manejb,qf 5uwa+m+ 7ie 5gnetic field points

  A horizontal wire carries a current straight toward you. Fromf0lt.j6 2nrur your point of view, the magnetr0njr. ut6 2lfic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from abov :o7vns0vn (ote, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the t n:07onsovv(loop? The magnetic field

  A current carrying circular loop of wire lies flat on a9 ,aqrvakg 7b0 table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the ma baka7v g90,rqgnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fielhum4k ,l;3rf da4t.vi*hl(j p d is the

  1 T is equivalent toajbari;7 l*qbp -8+hfl7b mj rr/9zq+

  The direction of the force)ha8u4n4fr pk:t l5yabnb 8u5 on a current-carrying wire in a magnetic field is described by which of tautn4y r b n55k)8fu:4bp8alhhe following?

  The force on a current-carrying wire in a magnetic field is tgl : mgsulr81 spn4; 77fko4uehe strongest when

  The force on a current-carrying wirr;k59* eyt9m 4/ jz cjudrcf6ke in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where sth53lnr7 2,z2vdsi g8ii;9m agaw1fthe magnetic field vector points due north. What is the direction alg 2f mg5hvs127rd ,3zst;wii9i8an of the resulting force on this current?

  A charged particle moves and experiences no magnetic f2lsv sd:whoz+*9 oyn+(mt;c iyyz 1e 8orce. From this we can conclut *;+s mh9ocoly den821w(iv: +z zysyde that

  A charged particle moves with a constant speed through a region where a ul8 3k-q 5 pp9pz*19c :aeteb+,jmakw s8ig lzmniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on,ajaw:9g 53lkkcmpi1z*8mpq pse l8e-+ zbt 9 this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnvxgpqfh ,bk2l ji lkw27 ij;km05t960 etic force on th2 6 l9gwpfbk5xivkmjj,kt0li07h;q2 is particle

  A charged particle is injected into a uniform magndgdkc1 shy lj o.k *k4-8t18enetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particleddtsk 11- kk8e* olc nyjgh84.'s weight, the particle will

  A charged particle is observe13ex;j +sm9ovr bt/f //azyysd traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular ;yb3y/ s/fmtarjv / o1 +zs9xepath would be

  A particle carrying a charge of +e travels in a circular 5sidzbz 65h86(7 veihlf ju1bpath in a uniform magnetic field. If instead the particle carried a chb j6 (6eu7 b15iiz5v8dfhzlhsarge of +2e, the radius of the circular path would have been

  At a particular instal thg0ds+l()pe x,py,m z 9:wnnt, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic n+g(p:0 dhl,e,w pyt sx)m zl9force that acts on it is

  An electron has an initial velocity to the south but is observed tom/.59fn3whfx g k*pxx curve upward as the result of a * gk/hf.w mx9x3pnx 5fmagnetic field. The direction of the magnetic field is

  An electron moving along lhhmvq tgs(cl* /9k7+9tw :zq-5d jj dthe +x axis enters a region where there is a uniform magnetic field i+lj9 dhhk 5cq*v mtqs9j d-:(t7lw/zgn the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straig m3ut*-t2 kcupy zw*thtw -o++ht current-carrying wire is

  At double the distance from a long current-carrying wire, the stc3wr bln.a na.ql(-i-9y: qlg.f zb h-rength of the magnetic fi.hqbq-9aar -3 wczgi.fyl(:n- l .nb leld produced by that wire decreases to

  Two long parallel wires placed s*ggcf.ssvflx7 :y mi:fq()t/ ide-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your (c.fvgf:q )tims 7 xgy:f*ls/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 a.yw7ns0gj8 tlr28cj k c;7mmhorizontal table carry identical current straight toward you. From your point of view, the magnetic fiy t; rglnwm8 m2jk7j0c.c7s8aeld at the point exactly between the two wires

  Two long parallel wires carry equal currents. The +ii jy7z(wr v4magnitude of the force between the wires is F. The current in r4i ivw+j y(7zeach wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towa rv.-7(.kfepo qg-e fxrd the east alongside and just south of the wire. What is the direction of the force pq.koxgfr(vef- -e.7 on the proton?

  A wire lying in the plane of the page carries a current towardm. lsns,4loj uy+y/*i the bottom of the page. What is the direction of the magnetic force it produces on an electron jl,myn s.ys /l+o* ui4that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are plcv)8jk*:-j1ofr u bl r3i2gwdnv2p. jaced side-by-side on a horizontal table. If the wires carry current in the same directiondrv.jlp 2o ) uri2w3:kvcng *-f 1jj8b,

  Two long parallel wires are placed side-by-side on a horizontal table. Ifta xgj7w lu 6nq(s,krg89(7pp the wires carry current in opposite dir6r lsnpatj 8wq(kg7gxup 9(7,ections,

  Consider two current-carrying circular loops. Both are made from (48+cmbo9 64;oyjt pooabmrre woa8.one strand of wire and both carry the same current, but one has twice the radic o +y aemr8w;tb ma9 ojo64(4oopr.b8us 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/ bpeuzgoex g3;2*vx5 3oh7q g-carrying 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 moment of the smaller loop, the magnetic moment ofxpg xg *h 3euo25vb3 o7qz;g/e the larger loop is

  The maximum torque on a current carrying dn5d/6zn( m6o/t vgab )n3cxrloop occurs when the angle between the loop's magnetic moment and the magnz/ vbdmc o5 6/nxgt63 ()adnrnetic field vector is

  When placed askew in a magnetic field, a currentk*a:k a;b 4rg ja+lb3j carrying loop that is free to rotate in any direction willbk j4;r3g+aakjb l*a: experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric mo xoyi (,z:5z8h(6dq; uompxmotorsy 8(pxxhzzm,:ouoo6q; 5im d( ?

  A circular wire loop lies in+3 t:zb(0h*n o xx2cinfy/pbx a horizontal 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 below innf/x*(zx20b hxt:opc3 +by 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 ma.1h2:wkhwqzg a3 jvj /ss m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it a jj123qg: .wwzk vhh/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 passing through cr.,vej:r3bw lgossed 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 v, wejl3gb.:r, 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 oriented parallel to a u**.qw1tjyn 4b6zbi q xniform magneti xwj 1qb*6iqb* 4zn.ytc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dirt*b5o2/tb.kz v;4 lz w6m iefjection 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 straigh5r ,k70(p 7jq)5 kywr)lyh -lkta dmdft wire carrying 5.0 A when it is placed in ,yk)r yk7)075wqmr -t5kd afl d hpj(la 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 rb)h)2wl-uv7sz8 uuekg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in ordeu hs2vl8e )bu7-uz)wrr for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fiezj- 67-sibikdf to9ae2zsw 8 ,ld of 0.20 T. What is the magnitude of the magnetic force on thee,6sd-z9atfz7bo8kiw- 2s ji 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 speed 1*0 fv/zspiac bvr (f.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 speedx/d0u+vq h4u*) nvft/rhf/jwirm*2 t 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 due2lbe.d9eta ; yxit4 pt/tx,0c 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 ofcf .n 7wl;wuqxtw+6) m $8.0 \times 10^6 \; m/s$ 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 of 6p-qyxv m(oehru(// r$8.0 \times 10^6 \; m/s$ 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 speedo.k ay93n8x6uvtvm0 jdbee 5* of $3.0 \times 10^6 \; m/s$ 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 xni;q 6frp --ka current of 25 A. What is the magnitude of the magnetic ff6r; - pxn-qikield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fiely-r -r)f,c 5oc6c1emvvrp,vxd at the ground, 10 m aw rxv 6vc)v,r y5-1eo,crcpf-may?

  How much current must fe(m 7 4j.+lzettcg)zflow 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 wi w4:kt:fq(ycmyq2hlvfsqrslb-p 6ys( 4 h -30re carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's c-wtqk26qhf ry0l m:v-3s sb (:q4 pf4hy (sylmagnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opp/0l;/gvw rq +dciu+dsf 9-yqyosite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is y w9+gqi/ rf;q0 dc/vylds+u-20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 Ay 2na8w et3zz1 and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field miwz za 28ty1en3dway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in- ymcf8us 6:-pw ide0c opposite directions. The wires are separated by 0.20 m. At what poincm -cuidw8 pe:f-06 yst between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in nrb, :dj,,fk-easn3 fthe same direction. They are parallel to the z-axis, and they pass throusb,jf, rkn,f : a3end-gh 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 and 8.0 y1 v /mrv:crd8A in the opposite direction. The wires are separated b8vv 1/mcdrr y:y 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop act+-98sk uty de-rs .of wire of radius 4.0 cms9 a et-ktyu.+8rdc- s when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field im8:jgi tidm oojim: : k1-)i/ps produced at the center/mgid 1ptjo:8iimmi : ojk-) : of the solenoid when a current of 10 A flows?

  A solenoid with 500 turnswekv u.)65 cs pjp4q*lptpr97* m(xyx is 0.10 m long and carries a current of 4.0 A. What strength of magnetics )qy*p4m .*p xu6e cxp (vtl9rjkw57p field will it have at its center?

  How much current must pass thrsz5*uxwz7ea-ywc . 7aough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at thaax*5-zzyw e77.c wsue center?

  How many turns should a 10-cm long solenoid have if it is to generat g;saeqfh8on0u, 20cbe a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic momeo g8poxoi3)tc6p/zq8 njy2t.nt of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0j .g/i88tocpozoxqtp26 3 )ny cm x 8.0 cm?

  A circular loop of wire of rul oobtw1ti,k6wgmb/6.x 43 a adius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Wh1gw4.otol 3u6bm6iak t/,x bwat is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional mc g88cyer p/gk:w7qn53u( m1n0ucb iarea $0.12 \; m^{2}$ 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 current7)jvdupcoc- / of 2.0 A is in a magnetic field of 3.5 T. The loop hasj cc7dv)p-uo/ 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 9f s- zk9pnjx+ug,w2w4x( uji is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnei4-,w9sjfz9(2puk n x g wu+xjtic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire oo -54o.a 8ds hvltqep5f radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2eqh .4t5 8svpo5dao- l.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop ofvb q+hjrm dq9(s;5 gsz,)u6 lkwe :3ny 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-chstsnhbzn 8u( v9o662q arged particle (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 ve55 rrvxnugr d * .vw5e7c4sgg8locity $6.9 \times 10^6 \; m/s$ 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 *wutgwcimckb75+mth)5)( +f /k yuae a magnetic field of 0.040 T. What is the radi * m5ufkg )w7hc w(caymt++bktu)/5eius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters abi2z8fgoy*e 8:fuh/ e magnetic field of 0.30 T oriented perpendicular h bfz828gui*e: /eofyto its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potenti yr zz3*mls;5i53tf.kkmg:xu al difference of 10 kV before entering a velocity selector. If the B-field of the velocity siuk3yzk gl5 .*5:mfsm;zt3 r xelector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?