If the north poles of two bar magneh: zteji q+uz;+(ym;kts are brought close to each other, the magnetsqjek z;h++tu;(z myi: will

  If the south pole of one bar magnet is brought x*nign /bo.r c9c0g u8near the north pole of a second bar magnet, the two max0 n/u bcgoc g.r9*in8gnets will

  If a bar magnet is divided into+ xi;hvxvr9 r/jr x3+qe):q ks two equal pieces,

  The Earth's geographic North Pole i5gaos:cwi(lmzd bxy/st8+)- + f:n wis magnetically a

  The south pole of a magnet :+t3uei17sdj2v z x i ffhm.m93ptxe(points toward the Earth's

  An electric current b ,*,3cp)judiq r;olyproduces

  Which of the followinqfh5yw 762za gw*-ixyg is correct?

  A vertical wire carries a current straight down. To the east of this wim.apjh 7 z v19x0vdl0hepgt02 re, the magnetic fiel0em0t1jh p x2zd vva7g. hpl09d points

  A horizontal wire carries a current straight toward you. From your pointk *:g*ni/:kpwwd; ov5qmg - dxuo/*dn of view, the magnetic fie:dv*o/u dw* g-;koqk/nx g5wi pm:*ndld caused by this current

  A current carrying loop of wire lies flat on )75 dcd6rkx z jotcj6:a table top. When viewed from above, the r6z)7 : dccxd5tjojk6current moves around 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 lies flat on a table top. Wh drha 6h1l:..6jxuylien viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused byxu.lhy ah1rl6:. i jd6 this current, inside the loop? The magnetic field

  The SI unit of magneticyu9fgotxk /a2o)9 71d osy 1a,mvt3zu field is the

  1 T is equivalent to) v;,hzqu e9ag

  The direction of the force on a current-carrying wire in a magnetic field is desq6sbh).vomd ovai)m :b( rx3.cribed msxa (ob mvorb3v)i.6. d:qh)by which of the following?

  The force on a current-carrying wire in a magnetic field is the strongesxf5 ab30b1dth 3bc 0trt when

  The force on a currentdud l.n,l yxx2/ack2/2, x vbn-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight u ujm(9trf whc9,9lupi6o;r ;u3 d0rtbp in a region where the magnetic field vector points due north. tr;9 l3tuh bdor0(cf 6 rpj;9,uwm9ui What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic forcele/7.c7ahz) 4uf ifloafd0djuifw 0 .8v( 7wj. From this we can conclu)8ae0wfdf (wu4.f i. 7 ofav7llujhzjid7 /c0de that

  A charged particle moves with a constant speq.rowdc ap 0 p5g/,v0f(qkn/ bed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on tdpp0r5c ng//,b(vqkoq w a0.f his particle will be maximum when the particle moves

  A charged particle moves across a constad ysh 2posn(gt)i w/ 170-nxadnt magnetic field. The magnetic force on thi7s0dtg /w1ipa 2 d(soxnyh-n )s particle

  A charged particle is injected into a uniform magneticg,v-e5g7 xwzjrk + o-x field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the pare-7xw+ zgrjvg-k5, xoticle will

  A charged particle is observed travelingt;lm6vz e1f7 z in a circular path in a uniform magnetic field. If the particle had been traveling twice 1el zf; 7vzm6tas fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform l6ng)krjt (x.p5 gno- magnetic field. If instead the particle carried a charge of +2e, the radius of the circular pat.xnj k5og(np6l - g)rth would have been

  At a particular instant, an electron moves ea4ur) *3weeszzddc ,r 3+7 k6:c smdfknstward at speed V in a uniform magnetic field that is directed straight downward. The magnetic forceme:7k4e +k)c3z,uddd ws6z3 *rfrcsn that acts on it is

  An electron has an initial velocity to the south but iswpez )vw0*oj.02n j1mu hy c7d observed to curve upward as the result of a magnetic field. The directi2 vmpn.uec10jww7 *ho djy0z)on of the magnetic field is

  An electron moving alolgx ujmx28xu;c97pvii,3oxgd* /j x(ng the +x axis enters a region where there is a uniform magnetic field in the ,; x3x( jdv oj*lp cu98gig2xxm7 i/ux+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 straight current-carryingh t-bn4pp 4jhtlc5l6yb )4wua93 m3pp wire is

  At double the distance from a long current-carrying wirtu1(np18 twze6u4 aqxe, the strength of the magnetic field pr1q4upxwae 8u (1tnzt 6oduced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identi49 wp ba)( ;7mjq1mnq1tjmgn ocal 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 at the point pmnj7)bmqj;1 91woag mq4( nt exactly midway between the two wires

  Two long parallel wires placed side-by-side osb(m-cj ;kiw z*w 4iore2ob 08n a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly o -s(b0br;ijkw8i woz 4em*c2 between the two wires

  Two long parallel wires carry equal currents. The magnit5m at7fp1 nid/shphx u),v4o84e1jbk ude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wir 4kh1ox,/pauhvbe)7m fn18 4tsdj i5pes?

  A long straight wire carries current toward k6(9 eha(tmajthe east. A proton moves toward the east alongside aa(k( eth69j mand just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page cak vm (b.w2-4 nmzkdwf8rries a current toward the bottom of the page. What is the direction of the magnetic k .f42mkw vzn m(db8-wforce it 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 horizontal table. If the wtvm*z04 wy,vs irest, s0y zw*vv4m carry current in the same direction,

  Two long parallel wires are placed s9b;1 k sukb a6p6brk9rx,h ah3ide-by-side on a horizontal table. If the wires crhra6kb1 k3;9b xp,9ausbkh6 arry current in opposite directions,

  Consider two current-carrying circuj (xh5s, n luc*yv1z;dlar 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 field at the center of the smaller loop, the m;1(yvs*5 hclz, x jnduagnetic field at the center of the larger loop is

  Consider two current-carrying vx14afh :01ygzuht bvw ) *h(ucircular 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 lo1zht hwvfvb)x:4g (1 ua0 yhu*op, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the ang kllw/ f*p.rf/le between the loop's magnetic moment and the magneticf .w//kfllp*r field vector is

  When placed askew in a magnetic field, a current dz ))g r)pio8dcarrying loop that is free to rotate in any p) dorgi)8z)d direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essyv zs9fjx67g0cv nuo*. ;l drei4 4w8tentially all electric motors?9v*v8 lrg uf0w4cs6; yx n.7ite4 zojd

  A circular wire loop lies in a ho*kr unhg+ lfjt ll768mt))4 rzrizontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point,n8u+ 4) k l*mfl7l)j zthgrrt6 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?

  In a mass spectrometer a particle of mass m and charge q iup+z u z04/rdls 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 tzurl+z0 /u dp4he particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crossed electky .5m .si7aejric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocik .sie5y7.mjaty 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 unifor5f nz8bx h7w6cd 62h 7tv/yi9r lf5scbm magnetic field 5wlhyhi86t57x cbfd cfsr 7 v296 b/znof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curm;g) pj)a ndxlud4f4;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 carrying 5.0 A when it is plac wzhvomu+.)y.-bh r-lrg(uqi2 -w 3kded in a ma-)hrdg-wkq.3r m.zu-ylwh2b oi( +uv gnetic 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 kg and is in a magnetic field f/dlvw)f: m );(r3;xygy ew 8nj ctw5dof 0.5f :dmwf8c/g3 dtlj r wn)yexy );vw;(10 T. What 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 0wt v -w7.,wziweg rl;+.20 T. What is the magnitude of the magnetic force on thevwgrlwti+w; z -7we., 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 acm1dc v6d nq j9w8x.8e.u bl.x 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 speed ofkv 26g;h 7v*s5txvfhz $5.0 \times 10^7 \; m/s$ 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 nortibgy1z +/.;5z o0cqaegej 9mih 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 ogae1kv9d / ;itf $8.0 \times 10^6 \; m/s$ 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 ofn :bf/6fpr51e yv(k aa $8.0 \times 10^6 \; m/s$ 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/u6rp ,q(llbnrozih5,mdfa /ws c)( ) 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 magnit 4 3egd; 7q7obyigshi1k.y9uxude of the magnetic field at a distance of ue 4b .x3di;7g1y9h oykq7isg0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field jb 3 q:/c6en0sh;hi+cy)h-sua tbk) xat the ground, 10 m awayci;jqs3)0 u6khat-) ex+bnhs :yb /hc?

  How much current must flow forzbif*h r;j, 9.zc8 rpg $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long strajxj(4y z/gh4nu9yb v :ight wire carrying a current of 5.0 A is the magnitude of the magneti44j yxyzv9jgu/ :nbh (c field due to 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 nry q.eywd 7hvvv+co3 (mppq:d9:,m ,currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a cq(vro., dv pyh:3vy ,p mn79 emqdw+: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 dir. v7z 2umrvi( jfnph jq. au2o7ln60-fections. The wires ( ofup2 l 0j7..hvnj-27fvrumn iq6azare separated by 0.20 m. 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 directf*q9 2xmb pr p18ier1 a-ukj7bions. The wires are separated by 0.20 m. At wh21f b pme -rbjqp*71 8i9axrukat 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 direction.+ ybc/moa)a jh+ac *s39efpy: 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 oneaf /3*+ js c yoep:b)amhyca9+ of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8f i ;/5)ildzav7f7mq s.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force p7sa v/ild)zq; m5f7ifer unit length between the two wires.

  What is the magnetic field at the cente9d k;owdz /.glr of a circular loop of wire of radius 4.0 cm when a / wz;gddk.o l9current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns ohjpsbn: d 2a ge,b,) )o*sasl6f wire. What magnetic field is produced at the center of th dbp*j:s,)6bshg2n a )eas ,loe solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and caw+ua /t a 1hxpp2)f0fu-u4 ujlrries a current of 4.0 A. What strengtufjxp2ua)4h+fp- a/l0tw 1uu h of magnetic field will it have at its center?

  How much current must pass through a 400 tur8 0 y8;cuayqptn coil 4.0 cm long to generate a 1.0-T magnetic field at the qu;t0yycap 88 center?

  How many turns should a 10-cm long sole3 isre9)dcysit0w* )s y:ya7nnoid 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 rectangul )avg2 . jjgua9n;22c (gvkppmku8wg)ar loop of 120 turns that carries 6.0 A if its dimens)n ;2j2g8j agm.vu gvuak k2g(w)pcp9ions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.7i1 g37f h,w)nxl7a9frizq f j0)ylr f50 m is in a uniform magnetic field of 0.30 T. Thnfi fi ,r)l7lz3071h rwqya7 xf)j 9fge 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 croam/wk o) f0t ws oivn9/m,h1d((sawg*ss-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 Acfiz c hd+tp0++0 /muv is in a magnetic field of 3.5 T. The loop has an ++cpd t+00vmz uhf/ci 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/lu il)bte:j jl;7f(i of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current jjll(ui7/le;fi) : btin the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 mpi,ep yj5g )su5y5,ie is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the m puj5), pe 5gesiyiy5,agnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of arepfzkipqj h i9( ph4za:di25pvl/ 4j(1a $0.25 \; m^{2}$ 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 b* n/mn9;wxob 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 wi1 +mbed gfmf8:p.zl-o th 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 potentiatnmi+-sh6r 2tetyxklw gr3 mk 743w53l of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton'sn6s2ytixkmg7 r3h5wtk4wl3-3m te r+ resulting orbit?

  A proton is accelerated from rest througn-1rmy7l ud 2fh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular tydr1l-um7f n2 o its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerat mx)5 .cu)jqr 49b lswaxs3zd4ed through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector had labr qz)5xjs)4 c.sw9 4um3xs a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?