If the north poles of two*ido4pyhmcf i3dwh(1:gtw l/ d1 .e 6g bar magnets are brought close to each other, the magneto .c1m g1e/(t*i:whd3y 4hpwfidl6g ds will

  If the south pole of one bar magnet is brought near the north pole of a se *bjxf(sj-55f6n/(oxpiz gwxcond bar magnet, tfg6jwb x(*soz5-x/xj p5nif( he two magnets will

  If a bar magnet is divided into two equal p73l( ec ja:ybcieces,

  The Earth's geographic North Pol- aasocjg.a6r14xm 2 je is magnetically a

  The south pole of a ma7:8e;uhd uid6fq 1ba n0jo,py gnet points toward the Earth's

  An electric current prod 17thoo:h*) b3wbb lkhuces

  Which of the followingk2dyq x*l8 uy+1hbywil. 31na is correct?

  A vertical wire carries a current straight down. To the es +;9kbhsklrn 5 )oxt*ast of this wire, the magnetic fiell9s nkr+5*;s th b)xokd points

  A horizontal wire carries a current straight toward you. From your poin +x,dqgrbh;af /( jpsd 4s.1 wtz6tyj6t of view, the magnetic field caused r.fjb6 6wpya x4zgtds,+1hdtq (;sj/by this current

  A current carrying loop of wire w + 6cgxqxwa:4.pv ij3t1/h hz7scxj+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 field caused by this current, x c3z.:wih1g6 aqx jsx47p /cw+j +vhtoutside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table topolq)-,hq(xuo* qs4 s t. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic fis s4hxloqq -)tu(*,oqeld caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is ck ,xmj+m/br9ta2 e7 xthe

  1 T is equivalent to0 y(q*4 ochcgz

  The direction of the force on a current-carrying wire in a maq p)0fyax 3zmob*4qyen)b7,g gnetic field is described by wh7a 3f )) qqm,4y0gnxpo byezb*ich of the following?

  The force on a current-carrying wire in a magnetic field is t )z10xnnk vv9zhe strongest when

  The force on a current-carrying wire in a magnetic field is equap0o0xh*qn 6cz;w, rvil to zero when

  A vertical wire carries a current straigh1ch .ngg1r8x uvh9iy-9rw/d jt up in a region where the magnetic field vector points due northd 1r y.w-h h/ri9xg18vn uc9gj. What is the direction of the resulting force on this current?

  A charged particle moves anda6 k,kxq79y:e vyu,gp experiences no magnetic force. From this we can conclude t6g:kaqu7p yy9ev x k,,hat

  A charged particle moves with a constant speed through a region2ce)fy yp7a lonst-yl 0hjm85 jf17i) where a uniform magnetic fieldynflcjea)7ypj712hyi0 s-o 58fl) m t is present. 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 a constanfckw 3qx2, )v*ij5;( gmw hlpla rr/.lt magnetic field. The magnetic force on this particlexl.h, kfl v2j 3aclgipq/()ww5;mr* r

  A charged particle is injected into a uniform magnetic fie 1redw y*f2h9okr g+07h6oyph axgohj;/r6g1 ld such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight,ag;h7jyk1*oh06o9 do +r xp1g/6hy wgfh 2rre the particle will

  A charged particle is observed traveling in a circular path in a /rtjvg+/d:x;kmf n b;uniform magnetic field. If the particle had been traveling twice as fast, the rkg mn /;/+fbjdrt:xv;adius of the circular path would be

  A particle carrying a 6m ,qpf (gngbc::fo :hw/7lia charge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge o 6mwhql 7fg(/ib,:cg af: np:of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at splgz uzj+48iv 4l6;iur eed V in a uniform magnetic field that is directed straight downward. The magjl rig ;viu u48lz6+4znetic force that acts on it is

  An electron has an initial velocity to the southip3h3/1 xfrnhq d y()v but is observed to curve upward as the result of 3q i/hd)(3fvxynh1rp a magnetic field. The direction of the magnetic field is

  An electron moving a6j-yyg z ;jt3glong 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 out of the 63j y-;j gtzgypage.)

  The magnetic field produced by a long straight cupjl7).zij p+vrrent-carrying wire is

  At double the distance from a long,sl2s40pu**audrfug wn /i *h current-carrying wire, the strength of the magnetic field produced by w0 24uuus/g *nisp** hfar,d lthat wire decreases to

  Two long parallel wires placed side-by-side on a horizz i9-g0tdat4m9sf7 pkontal table carry identical size currents in opposite directions. 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 t 99i- sfm 7g4t0adkpzat the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizonta hxd504 )ki 7r-cfpqebl table carry identical current straight toward you. From your point rpx)-4c 5idb 0ek qh7fof view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carr,+e8v 4zxkl8t.u ,o mwwcs,q qy equal currents. The magnitude of the force between the wir8 vu k4.t,o8z+wcq,lme qw,xses is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towa. n40soy;jmb ;rj t96ecfcm u9rd the east. A proton moves toward the east alongside and just south of the wire. What is the direction 9m6j0fce 9 ;;ns4jr cu ym.tobof the force on the proton?

  A wire lying in the plane of the page carries a cur2)to,odtr41v++dkh exjbp g j+p k 9-krent 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 planogbjk9++pvkorx 4dp1)dt+h ej k -2 t,e of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If the ix+ (xiq*p6ip wires carry current in *q p+(x iiix6pthe same direction,

  Two long parallel wicnv4fd:a,d1c1 xbo) b res are placed side-by-side on a horizontal table. If the wires carry current in oppositecoxd)n14bbvfca1,: d directions,

  Consider two current-carrying circular loops. Both areq7vza8 :d1o+l8eh khe made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to theq8 k8+ a7zhee:1vl hdo 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 loosp* q jsbry:jn57 um*9ps. 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 magnesy*7 pjmu nj9rb q:s5*tic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a(1s evx;izjpt rz.7k / current carrying loop occurs when the angle between the loop's magn/(vz;e pki trj7z.1sx etic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current cip hztd1j 59dj2gctrw8nj l e5/ 81r9parrying loop that is free to rotate in any direction will experdt1/zi1t28g859pj5 rd jrjhp lew c9nience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric motors9udxb o 5j63.wq f*hmbgar1n 6x3hd1naow f 5.jq9grubb 6m6*?

  A circular wire loop lies nlrx+egfhty2 8hx6 : /in 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 the horizontal. Which side of the coil tends to lift off of the table because of the torque caused by the currents 8 rx+lg26nhh: tfyex /interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and cj-;ls *lmlpkbc5gj+8harge 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 mass of the particle ig lp5s+8jj ;mc-lk b*ln terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crossedxvf1ac ;jo8yv4 gh1 4d electric and magnetic fields. The forces exerted by these fiel;vx4fjc8va1do4y hg1ds 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 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 uniforrz;b)ozhbgk; lqp*:q8/ a +gqto,t c, m magne,qg*t,q+ pr boa q/hb8z gokcl t:;z;)tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curuk1 pnr8fhcg8/) pyb+rent of 10 A 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 straight wire car mnxp, i71. ad**cwrpdrying 5.0 A when it is placed in a magnetic .c*r1,imd pda 7w nx*pfield 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 mass4*2,pvflfg )ojcel;u of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the pu*4 )lef2oc, jfvl ;grod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 ee4ejdxt+k+ , T. What is the magnitude of the magnetic force on thejxedee tk++, 4 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 witu/k ,z1bczf;fh a speed 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+dh nl7aewypayx)790q 8 h *su 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 north with speeqq*es6b 3nr7efdxi 45 d $4.0 \times 10^5 \; m/s$ 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 hc5rc 0n ne0w(ekfs;l9 eb0c($8.0 \times 10^6 \; m/s$ 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,xf..rau7liz1an9mji 4 d)+ bkwql 8c 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 off r m:5rn4k3un lv,2mr $3.0 \times 10^6 \; m/s$ 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. What is the maxm;nqn/h;c) x gnitude of the magnetic field nc qxnhx;) m;/at a distance of 0.15 m from the wire?

  A high power line carrying 1yq op0u 6q3sh ) yuemigmq-p u/s(44v;000 A generates what magnetic field at the ground, 10 m aq46i)pyy u hs3 (eoqq4up gvm/0usm;-way?

  How much current must,j +rc:yv qs3h flow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from lqp6ky6p3i,m a long straight wire 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 magnetic field of abo liq366mp,y pkut $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in oppo (q a2dndmncgjiuv6o; ,i.6-h jnxg7(site directions. They are sepa(-7c6; ugxi ,d.no(gi 6 jhnn qdj2mvarated 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 the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dirz up(2jq 4ca/drllywc659;hr ections. The wires are separated by 0.20 m. What is the magnetic field midway betdlzquwrc6;rp9ayc5 2/ jh4(lween the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directioi(0d 0 ic6aulsns. The wires are separated by 0.20 m. At what point between the two wires are the contributions fr al6s0i(ci0du om the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are paralbh:m 5* whvu2klel 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 experienbvm:h 2h*5ukw ce due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the oppos2xs ,w2,ejkh 7qn g0g37k xtxcite direction. The wires are separated by 0.32xtx2c q,xsn ,0gwk7ek g7h3 j0 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of radius 4. 2.y*upwmx -wi0 cm wm .* wuiyp-2xwhen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magneticvxq7 m ucc)0jzqg5((r field is p(u70c5jg z (xcr )qvqmroduced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 xmyk*;e6;9 rist hmw6u/ n): vhh gd-lkzcr21turns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at i ;;uk *)r6mhwnecdry-mz2iv:lgh1 k/ s 6t9xhts center?

  How much current mustfp /mas 0kz.hq+2s2wn pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magne.snk0/ qpzw h2+s2fa mtic field at the center?

  How many turns shoul z8vwqpt(3p6v*0m lep d 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 rectan.woz9zpqf9k8(a ua2 aa o l1e4usl3,rgular loop of 120 turns that carries 6.0 A if its ( aosla zurp4e zawk9af,o3821u9.ql dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radi lvbxp*w3,yon r yc+-0us 0.50 m is in a uniform magnetic field of 0.30 T. The y +ob0yrv 3lx*w,nc-p current in 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 cr8bzwgy4mi-6+no,mre2 j 53yr d.i hnross-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 cujve0 d9b2mxg 3rrent of 2.0 A is in a magnetic field of 3.5 T. The loxgb d039ve2jm op 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 uniform magnetietwio qb,t3wiqt* l c9j/* ,j+c 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 magnetile ciw9qjtq,i*,t*o j3+tb/ wc field?

  A circular loop of wire of radius 0.50 m is in a un gk xd7e6/ ajcry96ae0iform 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 parallr90keegac6dx 6y a7/ jel to the magnetic field?

  A circular wire loop of areemn j5r(io; m*a $0.25 \; m^{2}$ 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 kog3n6c 2.1eq i5rg yie) 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 velocit fs*bh(-zi :1xkrrx*p y $6.9 \times 10^6 \; m/s$ 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 popqx9o19x+z 7plaq v lo9- j5zgtential of 1.0 kV and then moves into a magnetic field of 0.040 T. Wha9-q qjlo5lp xaop gvzx+9 971zt is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a m* u;ri dg(f-fhl2+of yagnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it igf f;( +fo-d* y2hrlufollows.

  A beam of electrons is accelerated through a potential difference of 10 kV befori)wujnexa70+yi * q1kg2 ax*vx( th9 ve entering a velocity selector. If the B-field of the velocity sa*yk)(7*x+w i1h9 tjqavxxg v eu20nielector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?