If the north poles of two bar magnets are brought close to each other, the m;( d)egfdp ; i4jplb4magnets;( ji;)4fp pmedd4gbl will

  If the south pole of one bar magnet i 1 yxvr, 3fu s 8f.-bwqc;yvvbxm9c;x7s brought near the north pole of a second bar magnet, the two magnetm, -vv.vc1yr bx9;x ;qfuxwf3b87sc ys will

  If a bar magnet is divided into two equal p3nwtxp 8h b3;k0b1e nsieces,

  The Earth's geographic eub2cnqrq/9z r/ 7 ) iujw8/ufNorth Pole is magnetically a

  The south pole of a magna/0vf sg3k6j l3*cnmd et points toward the Earth's

  An electric current producesv +qh;btfovj*/6 - lbw

  Which of the followik6)a (:2wpbcsg2r osfng is correct?

  A vertical wire carries a current straight do 64emtuww*0vpwn. To the east of this wire, the magnetic field points6w0vt*4 u wemp

  A horizontal wire carries a current ss( rb/ 6ygujj5traight toward you. From your point of view, the magnb(ugjr s j56/yetic field caused by this current

  A current carrying loop of wire li w-e9au *tnn7 4hl6rjkes flat on a table top. When viewed from above, the current moves *wt-9hauker 4j6n7lnaround 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. Wg4fr67 ng+z: xdc16ihzn x*n lhen viewed from above, the current moves around the loop in a counterclockwise seni *n71hn xzfdz4gg6 +r6 :nlxcse. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fie zl;6b7uof1lfpc r.:o 9oo,5wfcb j, hld is the

  1 T is equivalent toe 1fvpd39( i zkc --lw8hg-5ys;awpx q

  The direction of the force on a current- qy: gdr+9c)lbcarrying wire in a magnetic field is described by whir)+ qd:clb gy9ch of the following?

  The force on a current-caryve lqd(3i 4v0(wa .gwq 6r6ebrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in qe78wtq6uku dfkw0y-(7 2iq-hf v q:ga magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the hcd ywbm.)7f8magnetic field vector points due north. Wha8hb cm.7y)wfd t is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic forts to,t*o7w1 rgpa6k8)0 ayyxce. From this we can conclk8o s,r*y0ta1 6 pxw)g7 ttaoyude that

  A charged particle moves with a constant speed through a rej3pk b35h n:bygion where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particpn3j: k3h b5byle will be maximum when the particle moves

  A charged particle moves across a constant magnetic g d ja mzq+xcsdih9du28u d- 3rvv2-)ve5s6m/field. The magnetic force on h2 cegsiuv8 xqmvddj)rz v a39sdu2- -65md+/ this particle

  A charged particle is injected into a uniform magnetic z3.hy fv*t p)gcdn3k: field such that its velocity vector is perpendicular to the magnetic field vector. Ignorizk3c f3:*gh)vdn py. tng the particle's weight, the particle will

  A charged particle is o9 y/c.hlvwgf ;o)ql zn 8(2fnwbserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path (nl2fcqwln vyzw8)g.;f/oh 9 would be

  A particle carrying a charge of +e travels in a circular path in a univ/gz4in+ngw) ze;x(in( yoq +form magnetic field. If instead the particle carried a charge of +2e, the radius of the circuy( n wziiz)/e og(q;+4gnn+xvlar path would have been

  At a particular instant, an electron moves eastward at speed V in a uniformr/c(ks8huv px 8cugf/ vrho64t1mt37 magnetic field that is directed straight downward. The magnetic x//hp 4k1rhogs vc(u7vtc r68 8t3ufmforce that acts on it is

  An electron has an initial velocity to the souts.) p4vjc97uzhv 15jrj9bc/dn c g bf7h but is observed to curve upward as the result b/ .jj7h4cvgbj1 r7 9d suf)nzcc5 p9vof a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a unifor i 4+,nv j)eizh-xs*tmm magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+nh)z+4t -v i ,eimjx*sx to right, +y up, and +z out of the page.)

  The magnetic field produced by a lonm/,/yz1z ;b xsvpeqx)g straight current-carrying wire is

  At double the distance from8c9jl )j/ik ,1mrkk95t djctx *yjs)j a long current-carrying wire, the strength of the magnetic field produced by that wir 9 89jdlj*kj)c)rtjkjcm/syxk1ti5, e decreases to

  Two long parallel wires placed side-by-side on a horizoc*-hs+ /galkb)qq0 xo:td;tjr o* 6jp ntal table carry identical size cu:xqap b h ktj6 oj+d*lqg o-)0*;/rcstrrents 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 exactly midway between the two wires

  Two long parallel wires placed siu- to4zkp 2zl;de-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 wi t4op2z;u lz-kres

  Two long parallel wires c,da dqfz//)u +q/ikdaarry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What qdz)d/ dfkaia+/q,u /is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. ;89d/sg u5bja qyp /xpA proton moves toward the east alongside and just south of the wire. What is t8ap 5yb;pj//dgqux s9he direction of the force on the proton?

  A wire lying in the plane of the page carries a current towav +0ch0( ar*j jdgyp9zrd the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving per*9ygj0r h d+0p vc(zajpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side one/ hhgs7n6oc5* mr,hq 8jrlh/ a horizontal table. If the wires carry current in the same direction7l*hn/ j65rse, 8h /gh rmcqho,

  Two long parallel wires are placed side-by-side on a g-/laz*am e 3v)0,alrr,hxl chorizontal table. If the wires carry current in opr -xm*,lh al3z,ael)/v0 racgposite directions,

  Consider two current-carrying circular loops. Both are mad ,qi4xhq9nw2s80ji 3xfp1 dmge from one strand of wire and both carry the same current, but one has twice the radius of the ot9nj0 8g124p iq ,xxqmsf3 hdwiher. Compared to the magnetic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrytj kl nrcdj;2 h92)4aring circular loops. Both are made from one strand of wire and both carry the same current2ct2j4d9 lr;ajrkh n ), 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 occurs when the angle between tnlt ya6el;/ 8mhe loop's magnetic moment atly /8nme; al6nd the magnetic field vector is

  When placed askew in a magneu veeqjsmm--gd5 t-w+n( r:u2 tic field, a current carrying loop that is free to rotate in any direction will experience a torque unq5jvsret-d ugu( 2:-emw- +n mtil its magnetic moment vector

  What fundamental fact underlies the operation of essen 0-rfzhqel 4j.tially all electric motorsh. lj4z0rq-ef?

  A circular wire loop lies in a horizontal plane on a table and carries currenh ,qi4z ;g,umyt in a counterclockwise direction when viewed from above. At this point, the Eazu,mh,g y 4q;irth'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 q7h-q zzh4qj rfk 0xxy;x8y z83 is accelerated through a potential differz0-zyyhr4kh x qf;q38j7z8x xence 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 in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing throug8*x,hpt 1pxxl)cx za, h crossed electric and magnetic fields. The forces exerted by these f,lpct*x)8 h1,zap xxxields 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 p0x p t7;2)erv,t nhpb01ngiu a uniform magnetic field ofp)pt2vx tb07enn;0r 1hug,ip
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of i:6axy1im nw6 $30^{\circ}$ 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 straighta*vi( odjdmj-/ in0p 6 wire carrying 5.0 A when it is placed /jda- j6 ivdno m(pi*0in a 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 and is in a magne.awajw( zw *wiubrc 0*y 11m9:4ymhhptic field of 0.10 T. What minimum c jmyaiw:4 (wrpm* y u0wz*wb9hach. 11urrent in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a +dxjj*it0j+ puniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on t0x i* j+tjjdp+he 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 wit8i5bdb(ccnh+xt g t(9 h 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 speed ofz(re*pj gc49e $5.0 \times 10^7 \; m/s$ 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 vk1g6v i-kez p5 weqrcu,09.u 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 33jsam7:sn ci $8.0 \times 10^6 \; m/s$ 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 wit: 1t m(0u2yej k7uiigrh a speed 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 of k j.gw-s-bz8p$3.0 \times 10^6 \; m/s$ 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:qjyp az 44/sj )+uagz A. What is the magnitude of the magnetic field at a distance of 0.15 m from theap4) /js4a+zjqyguz: wire?

  A high power line carrying 100g(pbz4amqb,1f ,ig5idmco dgp 33, e60 A generates what magnetic field at the ground, 1g,, 3diifpbz qac mgb p36eogm,45d(10 m away?

  How much current must flow fp9e qfws39( pjor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a7za0cdo(5 dicq3vl 193 kvm3zn2 ugpx current of 5.0 A is the magnitude of the v19(vo cn gxlz37pc53 d 2q mz0aduk3imagnetic 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 curre.; y dhj1m0pgk*kt; /k3tlm qk cmr9q)nts 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 point that is 20 cm from one wi) t.* k h3k j0mcgqmqr /t;ykk9lp;md1re and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A; ozsi m;d(*ob in opposite directions. The wires are separated by 0.20 m. What is theodbs*i(mzo;; magnetic field midway between the two wires?

  Two long parallel wires carry currenhu4hkaau .q +-ts of 20 A and 5.0 A in opposite directions. The wires are sepa+ua-ua 4k.hh qrated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry qdy+8*o jo-tz)ot zt- 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 posiyotztj8-)tzqd+o *-otioned in the x-y plane. What 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.bty mdea)x() sz/6 c9i0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the twoc/tbz(xsyimed)6 ) a 9 wires.

  What is the magnetic field at the center of a circular loop of wire of radiqns(cz tec) j22sa-ok0noz 67us 4.0 cm when a current of 2.0 A flows in the sa6nzecj 7q (-ns2zc02o t)ok wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field isz91qq u ..zf7wlcexul +)1i sn produced at the center of the solenoid when a curren1 ziq+9.n 1 xzlcq.u)us7lfewt of 10 A flows?

  A solenoid with 500 turns is 0.10 m o+o6h0muvozgv 5y)c )long and carries a current of 4.0 A. What strength of magnetic field will it have at itvu 5vo)mc oh6z)0goy+s center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a nhxiqp t. xc+9mx6 svy:+2mv e7pby,-1.0-T magnetic field at the center?e+2pqm., x96 +xxty7n:cb - hmvsvy pi

  How many turns should a 10-cm long sole; x 0uf6+km/kpoaq+5cebma10 swo gx3noid 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 tus3jtwd7(.b; fw, osml rns that carries 6.0 A bd t7,fmw;.l(o w3jssif its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magne *0skpm+wfdu-p u:d+gtic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque whe*d:u+0fp wps+-udg km n the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-umi27rm 37pwdltn vmvd+o2x;f1 ,ow/ 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 magnetic field of 3.5 T.1n7x njdsh r33 The loop7nsn 3xdhr1j3 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 , o9ve-aokp3w sy+ lgmyhzc8swx(z *;h f ,5e9is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is h w h s3yo;8cog9ay-,l9e5z sz(, xvwm*fk+epthe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.502tb- uza rf85h 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 loop is parallel to the magnettuf-85hazr 2b ic field?

  A circular wire loop ofn;fbqao ( dd0( 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 sin993wm k9tv4 fb ndrp9c3 ijzq4gle-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 vel/w(zlpd lq*d 2ocity $6.9 \times 10^6 \; m/s$ 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 mof1x0gx /p0j sdves into a magnetic field of 0.040 T. What is the radius of the prod/ xg0 xpfj0s1ton's resulting orbit?

  A proton is acceleratedk5un0t 5fdugdk7/ 0gy from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its di50y nudkt dg50ufk7g /rection of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a pot +8 suqe :2s,ogi/n;gxg(95a rfl njeeential difference of 10 kV before entering a velocity selector. If the B-fi qjln+: ei soe5f28(ge/9ggarn sxu,;eld of 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?