If the north poles of two bar magnets are brought close to eachythv k5je (+2t other, the magnets wiltktv2+(5 jhe yl

  If the south pole of one bar magnet is bfjdv;k0 j(,w q( yy8mx8-ccnfnr9u m.rought near the north pole of a second bar ma nk8ccfuxyrj ;ym9qvj-m.w f0(n,d8 (gnet, the two magnets will

  If a bar magnet is divided + zbums3ar.- cinto two equal pieces,

  The Earth's geographic2bdy3.dgi q;tc *l q:id4i dz1 North Pole is magnetically a

  The south pole of a magnerdw az o+k, ),w,/ojuwt points toward the Earth's

  An electric current prod.wk t7e0ep un:uces

  Which of the following is c .dw6wpk5yf x-)utdln7lo8(x orrect?

  A vertical wire carriesg t;iu 2) cl8qj6aceh; a current straight down. To the east of this wire, the magne;hlcgt 82 j 6icea;)uqtic field points

  A horizontal wire carries a current straight toward you. From your point of vva.24c nw0izhiew, the magnetic field caused by this currec40n .zaw2hvi nt

  A current carrying loop of wire lies flat on a table top. When viewed fr;ak j)/epd/ o60ztt+ovu;gxsom above, the current moves ar0g6xso/;tv;)de apu jko/+ zt ound the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire j5p:uiedmg 7 j-c +zgg)hi.y4 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, 5gg-i)icj+yg.j4u ze hdp :m 7inside the loop? The magnetic field

  The SI unit of magnetic b2sekdk(f(wuzdx8 /k4c 3m)efield is the

  1 T is equivalent toovq-9+r9j 1ng(qz: m4fo pbc w

  The direction of the force on a current-caq gqj1s5x4be8b/od-brrying wire in a magnetic field is described by d5 o/8xqbjb -ge1qs4b which of the following?

  The force on a current-carrying wire in a magnetic field is the strongestsy h 9sx,ze+ ncy5s,4x when

  The force on a current-carrying wire in ;xm ooxre( x s8.rsd5+a magnetic field is equal to zero when

  A vertical wire carries a current strai i)x.1q8loudb30xfhk ght up in a region where the magnetic field vector points due north. What is the direction of the resulting force on thisx.dfko b q0h83il )xu1 current?

  A charged particle moves and experiences no mah63+sfl .rbm6.m ifl bgnetic force. From this we can conclusbh lb.+mr3 f6l.ifm6 de that

  A charged particle moves with a constant s:n,eo xf6ro rz+tq; 1fpeed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the parto :1qtxe,of 6zn;rr+f icle moves

  A charged particle moves ac: :bosxm ,vpr-hd;jk)ross a constant magnetic field. The magnetic force on this p kv,brhod p:x-;:sj )marticle

  A charged particle is injected inyaaxphf7k k sk ,u,)3+to a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field k ,ax,)y7khafu 3k s+pvector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circulavdv rn8+u.xi.v(42w cn8fz j tr path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wouldxdr(uvfz 8.n84 iv2w.c njt v+ be

  A particle carrying a charge of +e travels in a circular path i nd1q8tc - jmc/og/r*zn a uniform magnetic field. If instead the particle carrieo *r/dcj 1qz8-tc nmg/d a charge of +2e, the radius of the circular path would have been

  At a particular instant, an l7p wpbw3v;0belectron moves eastward at speed V in a uniform magnetic field that is directed straib3pw 0w;vpb 7lght downward. The magnetic force that acts on it is

  An electron has an initial velocity to the so jp:0yhgu3*3 gzvg+6pusw.m g uth but is observed to curve upward as the result of a magnetic field. The direction of the magnetic 0gsw6gj.zgp33y:+ mugpu * vh field is

  An electron moving along the +x axis enters a region where there is a unifor0y;b5hnbv* q i*vi+.q jwmf2xm0vkdp z6/o 9am magnetic field in the +y direction. What is the direction of the magnetic force on zvfa;i 2b*yik d*x+q 69 vbvwq5mmonj.p0/h0 the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight ryq*qsx -;*xw current-carrying wire is

  At double the distance kp e dsw8h1k-0from a long current-carrying wire, the strength of the magnetic field produ0ph es-1k8wdkced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tn(k d80blnv,jable carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wirejk, 0nnv8bd l( 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 horizonhu2q+ q7xkdz*tal table carry identical current straight toward you. From your2+ 7q ud*khxzq point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry eq)e p z8)om/ .acj;ss s9hhm)suual currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of )zssc spuhh))maose8/m ;j.9the new force between the two wires?

  A long straight wire carries current toward theizdk9h yraat,ka*5p *n f.4 ;g east. A proton moves toward the east alongside and just south of hi dk,kpt*5a9ya4* ;zf.agrn the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a currk6 f270mxkp+yfmq;p f ent toward the bottom of the page. What is the direction of the magnetic force itk 0 f7+f6fx2ppy;km qm 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 horiz 3sp2uuyl/7nd:mp ka9ontal table. If the wires carry9m32:7u l npakys /upd current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If n2 )esiab(w v)the wires carsvn abe)(wi )2ry current in opposite directions,

  Consider two current-carrying circular loops. Both are mader eqyf 1++v/:jju b9mt 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, tyru q:+jv9mtef /b+1jhe magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from ce sh4edugg)n8 r3t03s9x)buone strand of wire and both carry thets43dr us cg )bxe8e)0nh93gu 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 odor5:w m4 .nbxt6uta -ccurs when the angle between the loop's magne 5:x6unwd o-.m4attbrtic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carryiay,s-varj;rdrj:+*1v h pc ;wng loop that is free to rotate in any direction will experience a torp;a1s +vrd,wcj;*raj y: vhr- que until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric mbaz44iro5 ae+hy9ct g67ml1 jotorsea5jt rbm +az19h46o47glc yi?

  A circular wire loop lie, nqpxut5-hxvdy: z9rou ofmw8a82x/r/+ tf; s 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 interaction with the magnetic field?oq8 /n/dx th:fuyx rr2tw 8u -5;x+vamf9z,po

  In a mass spectrometeri siha+b7*dj + a particle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, +d+i7*aij bshwhere 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 passing through crosmzer8gv: c1pwmmbx6a/z j 4 66sed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certainacv:z / m6x6z1p mem46 grbwj8 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 ufwvxnq q.z -+8 l+;:q .mvxmcA is oriented parallel to a uniform magnetic fmvmqx:c+wv+.z8nu.x- l;qqf ield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in s8 )mv7bb58ymhgpgq 5a 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 w(*3(wehdowmo hen it is placed in a magnetic field of 0.020 T? mo*3 d(e (wohwThe 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 0k/ ;x 4ybp bmrad slpp.mg4;9u2r ph92.050 kg and is in a magnetic field of 0.10 T2y/k2p9p .bl4rsd9bp h mx4ra ;;upg m. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton i/faj k)dvh- 2hs in a uniform magnetic field of 0.20 T. What is the magnitude of the j )dvfhkh2- a/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 spe elz0ho 3 n:b;dgnpp gdj,)x24ed 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 o.at: lw l/.xc- j5vx.uaka8 ae)t v2qa 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 no/ nm ;gc.kqp58ue9u *ly :wbbdrth 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 of dvp( x(j7-xxcti )b 9f$8.0 \times 10^6 \; m/s$ 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 spek 5 s,2ynslur*/ /zeiled 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 speedegh4ayb2wa uvm4 vv0 a.7 ,/am 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 a current of 25 A. What is the magnitude 3blc h(, 52iijh mcoa6of the magnetic fie265m,cjl iab i ch(ho3ld at a distance of 0.15 m from the wire?

  A high power line carrying 10hq968jaxux.wc(9- mvig 2z ns00 A generates what magnetic field at the ground, 10 mag6shvn.m9 j(i 8qu2x-9xcz w away?

  How much current must flow for uof ;jq *;i0puovhasnob54 a-81x qh4$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight :pv nd-m6)fvg7h2n he wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the hg vd2):hp- mnve76 fnstrength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wiret gy 79e5,nzc xhapagv+zh/-hs 1r4f*s carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field i h/f7 t9 ,z gzynsah+pevghcr5 1a-4x*n 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 0 /+3wjxzklxdopposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the lx3z xj/d w0k+two wires?

  Two long parallel wires carry currents of 20c2yo p6gntmgp;;r*5r A and 5.0 A in opposite directions. The wires are separated by 0.20 m.2m ypo ;6ggr;p5tn rc* At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same directi 7rsimp4a/cb+on. 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 ot b/s7ra4m+ipc her wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the+jap7 bsg,i7i bq sg-s/fqq)9 opposite direction. The wires are sepb97f )ssqq7siigp , +g/aq-bjarated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic *du1q dxyw1 s*field at the center of a circular loop of wire of radius 4.0 cm when a ddu1y *1*qswx current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. t( g-+ zf3q fy2.,fz)kmq yofu What magnetic field is produced at the center of the solenoid when +(mftfz2q)-3.oyuf gfk yz ,qa current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long oq8:9q c +6h/fwb ssvzand carries a current of 4.0 A. What strength of magnetic field will it have at 9szc8 f q/b+sho6vq:wits center?

  How much current must pass through a 400 turn coil 4.0 cm s aznzp.-4 uj:long to generate a 1.0-T magneticn .:su4zaz -jp field at the center?

  How many turns should a 10-cm long solenoid hain(8v -ek /atwve if it is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magneticl4j(o -9sbgani7fh: t moment of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4og -:ib479n l(jshtf a.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is int 9y50i wi 4tqu ljt0r1j:w 4l)s5hdjo a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque whel5dt4tjw1sq04j w orhy:9 5l)j0iuti n the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cz; 4at3a8 /ijc1 c6:twwe b tw((zyykiross-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 a.b0lxmhex2ia/-m;q lzl+3c )u grw*2.0 A is in a magnetic field of 3.5 T. The loo acl imlqmw/3hbael 2rx0+)*g.x zu;-p 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 magnetic field o y.6lcrkinzy( .24 igof 0.30 T. The current in the loop is 2.0 A. What is the magneyr(z6 l.nygcoik .4i 2tic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire ofx ;2 kv; xepdf.rn.xp1 radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.fedn.k2.x;x rp1 ;vxp0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of d;k+m by* *f4( t9d9ho injiyuarea $0.25 \; m^{2}$ 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 sik yz;rf46b2mnngle-charged 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 velocit ,p +qywlns1r(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 potential of 1.0 kV and then moves into a magnetic fdnz6oh+m1t 11idxx,t 3wy/ xqield of 0yi1/z+xht,m6x1d qox wd 3n1 t.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a mgf eji nz f25(vuu0ft*1tf5;wagnetic field of 0.30 T oriented perpendicular tof1w*ueuz5 vf;jti 0nt2(fgf 5 its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelee)nk-g 2-x zsbrated through a potential difference 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 particles an2k) xb-s-zgere to be undeflected?