If the north poles of two bar magnets are brought close to each other, the mawztxo 9//a:0d afjk -wgnet0wwf/xkd-z o9 tja a/:s will

  If the south pole of one bar magnet is brought nearx) e9g;puu -pe-by 7zma1hu1c the north pole of a second bar magnet cuup1u a7 -9me-y1zh;b)xepg, the two magnets will

  If a bar magnet is divide7m3 dccci4o/jd into two equal pieces,

  The Earth's geographic Norl lh8im.5(xv mth Pole is magnetically a

  The south pole of a magnet points toward the Earz ) z1wf+z*d;oot6m tlth's

  An electric current producexnpf6)z) hg-,e z+et v9-pvjns

  Which of the following is ct0u-j c k(4s (h,*gwj dzow8laorrect?

  A vertical wire carries a current straigs *+* olul2u 5wqg5jpwht down. To the east of this wire, the magnetic field point5gu2*ol p +sjl uw*w5qs

  A horizontal wire carries a current straight toward you. From your point of viex qbu6pd5 m(3hw, the magnetic field caused by this currendxb3u 6m5(pqht

  A current carrying loop of wire lies (fe);,1 x lr (ol12 mmj eu )8yh5btwhsami4mqflat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetrtlf mx4ea(q2m8s1oi)l(u j; m5 1 hebyh w,m)ic field caused by this current, outside the loop? The magnetic field

  A current carrying circular lo)pa-i cc kp.i5op of wire 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,ap .i5kc) c-ip inside the loop? The magnetic field

  The SI unit of magnetic field is x0yo m6r6 rx+j05qr wf3 wccn:the

  1 T is equivalent toc,. cq6 +ngpar

  The direction of the force on a current-carry5 xu bgcp/ :xm618oxcgl7hpy6 ing wire in a magnetic field is described by which of the6o/ p:lpc8g6chyx g57 um xb1x following?

  The force on a current-carrying wire in a magnetic field isv1uj3d:+p a3hv 7arj q the strongest when

  The force on a current-carrying wijb wz 4 ixfd*05l3ri(tpr*gm1re in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where t-)iy vflak .k l 6mq-9j4tzc1xhe magnetic field vector poki- 4m-ftk6 .)yxq1a 9zj lvclints due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we c ;,:ysf5mh z)d9dy wwuan con9;u sy,fd:w zw)dmh5yclude that

  A charged particle moves with a constant wv l/m.rj 7)( eoikr0zspeed through a region where a uniform magnetic field is present. If the magnetic field points ve7iw .l)r (k0zm orj/straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field.r9n yr;*re- k//eib7 h2xeo no The magnetic force on this particly er7ibhkrn;r *o /2oe-enx/9e

  A charged particle is injected into a uniform magneti3 y :o.v9o-e7judu t8d g6cohsc field such that its velocity vector is perpendicular to the mao6 -ju ogutdode3vh8:.7y 9 scgnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observe7 k* z6-gnac(ae;a dmbd traveling in a circular path in a uniform magnetic fieldaca(7gnza;dbm6 -* ek. 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 cisnbs38fjk cb:vuy8.7;fo0m 1odbp+orcular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circulac7+ks838ob;o f n o:buy. bmv1dfp0sjr path would have been

  At a particular instant, an electron moves eastwark-1d ,et0exhp d at speed V in a uniform magnetic field that is directed straight downward. The magnetic force t, kt- d0h1exephat acts on it is

  An electron has an initial velocity to the southop5k+f ;-knjr but is observed to curve upward as the result of a magnetic field. The direction of r k-; +pkf5njothe magnetic field is

  An electron moving along theq+wub6y/b22v q6ph:f-vb n-u r x9af e +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,2ux v6bqf ua-f-q2p6ybvr bn/:e+wh 9 and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wire istkr c4cv7hd6ctsk(9q6 5u ,a w

  At double the distance from a long current-carryingg ;6x gvd;,x) 4g0wvlg6-y)kitou wfu wire, the strength of the magnetic field producdw ); k o-)igxyggvuutw;f4v0gx6,l6ed by that wire decreases to

  Two long parallel wires placed gfzggg153v52cg+1 euhawfo.u5m 5dx-w,xn zside-by-side on a horizontal 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 at the point hgx53cg gzmvg52du-u a gw xw5, 1off.n1+ze5exactly midway between the two wires

  Two long parallel wires placed )r 0 .r(tj((w/sezpbt re ir)5r;y bltside-by-side on a horizontal table carry identical current straight towa((sy;rrt (r5b eiz.jelr0tpw t)) /rbrd you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal cu3h fj *g 2r831rtyaiaoqf+ck 2rrents. 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 betwef123+af i8trcyga hqor k2j3*en the two wires?

  A long straight wire carries current toward:l u-+vti sf*jl ),(kgym-zcc the east. A proton moves toward the east alongside and just south of the wire. What is zc:,vfju+ m *g(--cyl l)ktis the direction of the force on the proton?

  A wire lying in the plane of the page carrieuf1 q,(i-e: s3ihfbles 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 toward the wire, aiu 1h3i qe :feslf,b(-lso in the plane of the page, from your right?

  Two long parallel wires are placfl qzw.g )j7/ced side-by-side on a horizontal table. If the wires carry current in ) czg/f.lj7qwthe same direction,

  Two long parallel wires are placed sy74 h(h) i urp(ykkg(lide-by-side on a horizontal table. If the wires carry current in opposite direc7kpl (yu) (rkhg y4i(htions,

  Consider two current-oc* hi04rmkf .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 field at the center of the smaller loop, the magnetic field at the center of the larger loop iskomrh*. ci40f

  Consider two current-carrying circular loops. Both are made from onrs :56sm3u gowe strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic momen3owr u5s:msg6t of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current car hh-ey is2me l+qo-w88,mxee,1. mjmtrying loop occurs when the angle between the loop's magnetic moment and the magnetic meoihm.ml8yewj,+-ehxs m,1t8-q 2efield vector is

  When placed askew in a magnetic field, a current carryiq2yzw7rr0h6atz )zh3x, ojd61q ub. xng loop that is free to rotate in any direction q .2z1x6tw jhq r yuh,b7z rxd36o0z)awill experience a torque until its magnetic moment vector

  What fundamental fac n) gwlr75pks t:6i,kzkz:cx;t underlies the operation of essentially all electric motors?i ;p:6n7gs zl)xk:zk r5tkwc ,

  A circular wire loop lies in a horizontal plane on auvmkk pqseeza12 ;6)+fo2hpd 3 k 8i6h table and carries current in a counterclockwise dir +m3)zv 1ke;pp62o a6uk8hqkdif2eshection 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?

  In a mass spectrometer a7oqwfmg5 ;+8khe v ih+ particle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it q8 +;ef57 mkvgohhi+w 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 par 4yd 0(2n ltcs44 pug(8rlbfxsticle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directionsg2ts4lxbnrp y0(cu8sfl (4 4d, 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 paral3ymie-20bc: tvkx.l f lel to a uniform magn2xk- 0ilemyv3fc:. b tetic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction op zif7 td;ocw 4l0g;m)f $30^{\circ}$ 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 stra6 sb v :.czj+vfq/s*byight wire carrying 5.0 A when it is placed in 6vjz.c bb/:svs*f+ yqa 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 kg andn:9ft1cpfzl a nkj-(i+qv qb x+/gq,; is in a magnetic field of 0.10 T. What minimum current in the rod is nei1qqa9-p jl:gkc (tzb,+fv +n nq;fx/eded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is tb sg9*ecyxl3b5r 3k7in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the protonbyt*g 73bc 3xrk95l se?

  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 of xqo:yvpbr 0nfc2/b7xua ww8w4l3g;1 $5.0 \times 10^4 \; m/s$ 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(b x odc5x;w;j 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 travelinkc4wsar07gpmld/5+uw q)u 2 d g due 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 of 9 dsajt7awtrc i/p+05$8.0 \times 10^6 \; m/s$ 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 6f:sjdek2v8 0 i*onccqac ie5 937ri espeed 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 oe(lcg82bneq;tk dqi5/ /o4ht 8neuy; f $3.0 \times 10^6 \; m/s$ 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(p qkh87ng-sju0rn1g; s. sj)j6 di zje nj(*f of the magn in;fjsj. 0qrjzsjgj6 heud8- g)k7 n(s *np1(etic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground, 1v2rc b. f+fv)k ntm-3a0 m away?n vt3.a k-bfv+fc2)rm

  How much current must flo(es /o1swww5 zd1a mw/w 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 kw up.u7ofvvxd(n ,v 7m4k05gof 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 k .v,5o74vd70pxufum k vwgn(about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite direcqvnyxa;f .kp ww +s)ur.f*ep41y07ja tions. They are separated by 40 cm. What is the magnetic field in the plap vq)*e xw uwy f.jk0f+r ;.47n1ayspane 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 a0ylr bjs)-+oend 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the tw+0lbeo- ryj)s o wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directijf w,w0 16tg45)o+y1ad /ktxubrsk nfons. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the sameft)ww6 5gf n yku41+jotd 0a b/,xs1rk?

  Four long parallel wii/.djh,prs6m6 6x r vfres each carry 2.0 A in the same direction. 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 f srhm666/fvpdjx,ri .ield does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 jcak p, qde p*91,ubg3rn-+:lybe ;xdA and 8.0 A in the opposite direction. The wires are separated by 0.30 mpp, dna1jk e,;c 3r:ub+-xqg b*d9ley. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a cirvv3;6yw uhve* xdo .w-cular loop of wire of radius 4.0 cm when h d3ywx oeu.-vvwv*; 6a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 /:a9tuj3q m ;zni.w j 4x.p zu-o)tvzad)r0heturns of wire. What magnetic field is prodwp0 o)uv 93/ jq)m4a-; n.zxai:dzuhetz.trjuced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turnm 7gznkwdclkwsclh:k a+ ),q cc30-/8s is 0.10 m long and carries a current of 4.0 A. What strength of magnetic fi3cwd) h/7lcksg m8n,:c c law+kqk-0zeld will it have at its center?

  How much current must pass through a 400dq :f:e, /d2zr tl.voz turn coil 4.0 cm long to generate a 1.0-T magnetic field at thqozd,flze2:v td /.:re center?

  How many turns should a 10-cm long solenoid have if it is to ge i(bqgj f.t*-rnerate 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 ss c*,nb8p xll+l w6f6that carries 6.0 A if its dimensions are 4.0 cm x 8.0sxws l 86+llf,p6nc* b cm?

  A circular loop of wire of radius 0.50 m is in a uniform magneti a7-f3 1fl+kv;pok cspc 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 perpendicular tock; + ffosv1p l7p-ka3 the magnetic field?

  A circular loop of wire of ete.a)q m +e s:a wg327x4yxwicross-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 a magneticpi/kj v,e.s-s field of 3.5 T. The loop has an area j/p -se, i.kvsof $0.12 \; m^{2}$ 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 dq +e* 4y e4stmds)5nw0.50 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 the4 )de5qysdt+ *nmse4 w plane of the loop is parallel to the magnetic field?

  A circular loop of wir a bnki;on+i*y 5iepls : 6((mdmn8sh7e of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magdbo nn7;+ehnsy5(isi8 m(lk6* m:ipanetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop oj vatily6p.*gs3z bn 5w*72r yf 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-charj42h zt:dn0cvv:yen7 ged 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 velouhzyvqihu c67z4*w437a;m r k city $6.9 \times 10^6 \; m/s$ 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 magije pat-ud ;nix1m,0z0ak;; unetic field of 0.040 T. What is the radius of the proton's resulting;1pezx i-umna ;j a0;,0uktdi orbit?

  A proton is accelerateij-z 9 1yvn-2m n( x1xk(pwxhtd from rest through 500 V. It enters a magnetic field of 0.30 T orie p12xtnx(myjh wzxik(-n19v-nted perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV befo l70 (m 6o1hp8vtefm1 fluri-sre entering a velocity selector. If the B-field ofl-7pr0t v 1f6 h1sfi(u8 ommel the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?