If the north poles of two bar magnets ade 3 :ure7iy9f go85kore brought close to each other, the magnets wifdkeg5o8o 9r u eyi37:ll

  If the south pole of one bar magnet is brought near the north pole of26 9czvbdtg*x a second bar magnet, the two magbvtd 926c*xzgnets will

  If a bar magnet is divided into two equasdr)q+yb+ e(i l pieces,

  The Earth's geographic North Pole is magneticallydo :hsl,/ 47+rbtf+kchymky* a

  The south pole of a magbg/tci 5f2xc:eop5 6znet points toward the Earth's

  An electric current produceb.ba1wxjz7u . s

  Which of the following is coret5p5lp95 v1:p5hkqj 3i6 h/jx bcmj wrect?

  A vertical wire carries a current straight down. To the east 0ql q)xygkg/abx +e9+of this wire, the mqgxl+q/ a +)9kg0by exagnetic field points

  A horizontal wire carriesg b4 d o.hle3+g1qk4sz a current straight toward you. From your point of view, the ml gqb34zgd.h4oks 1e+agnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed kbts/ lz97wct/peu ;7j 7k/f afrom above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside 9cta j7;s7 ewkfz //k7ltb/puthe loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table q4j p+n9y23m/ v)nul 18obqnts inro*top. When viewed from above, the current moves around the loop in a counterc8n * qt lp2ry)iuson+qmvn9 3j14 /nbolockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiely2 q3k82 okg**bsz+iwo/wehbn d ,/e ld is the

  1 T is equivalent to/t/:mc: y+gyri apy/o :qbi; d

  The direction of the force on a current-carrying wire in a 0,y4slse8kc 6mqvc0bsm2 ae :magnetic field is described by which of the veak0ysbm8 s,4c:q 0lscem62 following?

  The force on a current-carrying wire in a magnetic field is t ;/8,etfg4d r6/h qvr*dxti hbhe strongest when

  The force on a current-carrying wire in q,g6)6uhp uol bg-l xoi,6dp: a magnetic field is equal to zero when

  A vertical wire carries a currentz fcygofp*1, uv-45c)bqiz p/ straight up in a region where the magnetic field vector points due north. W)qpf4 /bp-gczov1i y,uc* 5fzhat is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can cdi:like,1 5h,m imom-oncludmed, 1 omhilki-5:mi,e that

  A charged particle moves with a constant speed through a region where n4 o4s7lr.c*qch b- 8uzh8ekja uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this pa -7 buhsn*4kzc hecjlqro4 .88rticle will be maximum when the particle moves

  A charged particle moves across a coty:9itq13 7suy6 2v r/smezrak1 9zzwnstant magnetic field. The magnetic force on this particlktuzt9q1zwe6sz 3 r aysvi2y:1r/9m 7 e

  A charged particle is injectedfxtm5;f s j7zl91( tnaviqx 6gm 3c.3m into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the panvif ma.m6 7 lcxfz1tqg;5 xst(39 j3mrticle's weight, the particle will

  A charged particle is observed tch x:ivs3sr ksalvmja-,) j/2/r1 /0ixz-gjzraveling in a circular path in a uniform magnetic field. sk-j v0xgz:r msrl-)jjax2//c3iav 1i ,zh/s 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 circular path in a u1ufggt1b2 *da ;zd r7aniform magnetic field. If instead the particle carried ;r7afbgg1 at1uzd 2d* a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward atx7 w, rtjfkpr-g c0/-a speed V in a uniform magnetic field tfa ,krxctj0--/ gpwr 7hat is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obsela; ql8 cs :h )ky9qcb3e2fh8 -miupta++zh( zrved to curve upward as the result of a magnetic field. The dik ih3cb+zh+c aeh-t8 um:q;p z2l9 )f(as8lqyrection of the magnetic field is

  An electron moving along the +x axis enters a region where there is a unifow* 7i ;*qdiwjqrm magnetic field in the +y direction. What is the d q;*wqjwi*d i7irection 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 straight current-a j1i;l-m cjmw)83zgf carrying wire is

  At double the distance from a long current-caram,hegm 8 r7x8rying wire, the strength of the magnetic field produr,mhmga78x e8 ced by that wire decreases to

  Two long parallel wires placed side-by-side on a hi 6jbuccnj(z6o2 a2+ worizontal 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 mo(zwjcbunc 26 2a6ij +agnetic field at the point exactly midway between the two wires

  Two long parallel wircgk n 4zkbazx.0o-( (res placed side-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 the two wireo r(bn-azzk40kcg .(xs

  Two long parallel wires carryf8v.bn.hj 3,oes ug9 s equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force b9esjn.h8f vuo,3g .s between the two wires?

  A long straight wire c u3hf:ul smj)jr s6,. ao+va6dl j6bi9arries current toward the east. A proton moves toward the east alongside and just south of the wire. Whaadal9 r hj6 i vu6:flb+j,ujs)m3 s6o.t is the direction of the force on the proton?

  A wire lying in the op:xeahp jph /u5t;x.(ew-2 iplane of the 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 .eh(h:;x2xtjpo pw5 a-ue/ pitoward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed si6k2ib 5q p (r4wqij+atde-by-side on a horizontal table. If the wires carry current in the sap+j65ka itr4q (2ib wqme direction,

  Two long parallel wire8.yujrdggbwmj*h87 b .9 guc2s are placed side-by-side on a horizontal table. If the wire7jb j2h8y .ug bw.gm8g*9dc rus carry current in opposite directions,

  Consider two current-carrying circular loops. izlv3+k7e d(fk u6yo+ ;g8bbeBoth 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 magnetic field at the center of byg+3d elkv6(;e+f k7b o8izuthe larger loop is

  Consider two current-carrying circulard7i(ccpk /fnjhl3+h :6yo8a nv6f0cd loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. C3n vph/ca :h k+0o6c8f lddyci(6njf7ompared 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 wh1skznn4yf (zks 57g /aen the angle between the loop's magnetic moment and thek/5ya 74gz1nfsk(s nz magnetic field vector is

  When placed askew in a magnetic field, a curnj -yc*r x;/hzrent carrying loop that is free to rotate in any direction will experience a torque until its mycx*n; /-rzhj agnetic moment vector

  What fundamental fact underlies the operation of essentially all electric motors1w+6bl.vo t7cw.zmssj8 bf( izlv7i1s8(j6+ ..btfwmo bscw?

  A circular wire loop lies in a hor eq+lcof4 ks51izontal 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 with4o 5k +cefslq1 the magnetic field?

  In a mass spectrometer a particle of mass mu5eo(u)bi-o*iy t* nt and charge 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 fiit oeui5) (yob- *n*uteld 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 quw z2zlykzi7d)d ;9tb.m +8b crossed electric and magnetic fields. The forces exerted by these fields are in opposite directi+7b d 89)ldzqykzmwiu;tz .b2 ons, 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 unifon(l 1hm6n odc9dm -bc;rm magnetic fiel-n mnb (6hc 1o;d9mcdld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A inb9,*xyuhss f 5e:h* h6zp ng4c 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 4*p7*zsygm+l,vpp ygA when it is placed in a magnetic field+lp4* ,z7yg* vsm pygp 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 k5c1ta-atf f7 a.cxn iso12gz8g and is in a magnetic field of 0.10 T. Whatgcaz18an5-ftx. sf7ca21 o it minimum current in the rod 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 T. What is the vw7d7vni tubbpi0( j:.j pn/su 6qv* /magnitude of the magnetic force onn0u/:6.s *pbi /d7jbipujv 7vn vqwt ( 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 lp vh, 0d/+l5;r,nowp 1ju atya 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 sp.k w;9dvh;tdfjsl 2u,eed 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 nory2y9d(aj;q ve2i9zf ioa 9y b9th 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 spevc+d5w c/(cy +rdo0r ved 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 with a speed og fq.5y7* lomrt 5ffj+f $8.0 \times 10^6 \; m/s$ 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 speedbcxcv2uom n74zf;5o 2 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.) 2,lt ex82i gaa2p1trzutzppj8r+ 3z What is the magnitude of the magnetic field at a distance of 0.15 m f2eg8p a+jl1 28r),ztx ritzzpap2 u3t rom the wire?

  A high power line carryiny7e6; gu yv-i,cjm, oug 1000 A generates what magnetic field at the ground, 1eu ,y i-7mog6u;j,vyc 0 m away?

  How much current must ftpo 96 (nkhd4mlow 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 a current of 5.0 A is the mo0(sj. 9kb n,k/nacuyagnitude of the magnetic field due too90ka, b /nujsy (k.nc the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. j5gs idqb sc .j;2r.1k 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 oneg;1.cjssjr25qd i.k b wire and 60 cm from the other?

  Two long parallel wires carr)urb5aqqsf-:3 2bch heqwf :( y currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m.q-)c3hea:qh5: f2bsfb rqu w( What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite r os+ n/qf.ji,directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wirsqf o.j+ ,rin/es the same?

  Four long parallel wires each carry 2.0 A in the same direction. They are parahg/iu;vzl* m)45e c*fd nwn8o llel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the x-y plane. Whu*o84ve cd5 *z iw f/;mgnn)lhat 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 opposite direcqoi5j a,r/ . 8lq3wn lt m;vs0*e*vnngtion. The wires are separated by 0.30 m. Find the magnetic force per unit length betweetg0j.ornn;ms qa neqi**w v /8vl,3 5ln the two wires.

  What is the magnetic field at the center of a circular loop of wire ofrp/s6:uc( e2l pfc+zh radius 4.0 cm when a current oflshpc/r pec6 :zf( u+2 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What maga. irnqqpby:k kmv14bv4w1 9 3netic field is produced at the center of the solenoid when a current of 10 Apw 4 94nkmiv3bq 1kq:v r.1yba flows?

  A solenoid with 500 turns is edpgev i*675 q0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have*7g56eqdpvie at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate fb8bmizc:8 sev 042tfa 1.0-T magcv20 f8i4 mtb:zsbef 8netic field at the center?

  How many turns should a 10-cm l *gji+eyp04keaj2a 0hkf,/q nong 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 loop of 120 turns that carries 7ak+h x+nk6v1r s.iny n6qg,1t; qdws6.0 A if its dimensions are sdh+i anr+ 6q,x g7.1tqkny k;wn6v1s4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m rjlax;lvtcdl 7g6hyn/ d0 8o0m w):p *is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when tn0*lddm py l:o;76xca0l)wv gr8j / hthe plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire ofrku) svoka 7s67re,a :/q t nxu:29qjg cross-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 2.0 A is in .:m tz, 8azugia magnetic field of 3.5 T. The loop has an area ofu:ag8.,zmti z $0.12 \; m^{2}$ 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 mar7q)u c*ks,vlcs7hdl a /:h5 qgnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque wu7)qk/cq5l s:a sh7 hr*vl,cdhen the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50;d- pr3l; ufk w-xy6 :l;cqipf m is in 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 lowpp;i-;l;lc 6fkur qfx - dy3:op is parallel to the magnetic field?

  A circular wire loop of a4jl 9z6x.p)wfro 8 eharea $0.25 \; m^{2}$ 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) 13fw( u3dw ) ks ,iy3ro)vzvrjz* z-fdhas 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 ionianhb r rxggeju l+ 6nv+-02 agzx;90r82n m-f with velocity $6.9 \times 10^6 \; m/s$ 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 m1f dwhgcxzgmm en+6 8 e*(98reagnetic field of 0.040 T. What is tgf c89w+(eng xzeh16dmm* 8rehe radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fiep8g2 j2 f si:z7 4wf*nwp,xxumld of 0.30 T oriented perpendicular to its direction of 2 infx2zmg48u7:*ws, pfxwpjmotion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a poten3/2(o2g s3xp fspt nwdtial 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 are to32s(dfng t/wx p2p3 os be undeflected?