If the north poles of two bar ma i(cuz5a o90-xlgg7emgnets are brought close to each other, the magnetsg9um o-(c5x0gl ie7 az will

  If the south pole of one bar magnet is brought near thpprkn/ *5ha 1qe north pole of a second bkp/ h1r apq5*nar magnet, the two magnets will

  If a bar magnet is divided into two equal 0.uj 7:ksrih-u* rriuz ux 5s,pieces,

  The Earth's geograph+i:l*78vb0e.uz pqxvjwv - w hic North Pole is magnetically a

  The south pole of a magnet points towad14fkaiqv)h 47-m etx jc8sj4 ft+3scrd the Earth's

  An electric current produces(xja2 hli (ub t+x4+gq

  Which of the following is 6y (j)b39vv obgc+xzxcorrect?

  A vertical wire carries a current straightl jp1 -,e45c2ve0t:qsb ( gdlpnwx6rm down. To the east of this wire, the magnetic field poixgbrll-jc(4 mqd: p5e0 26, t1 pevnwsnts

  A horizontal wire carries a current straight toward you. From your point of vieo,0ki9v)aa me j(f0m ew, th0e (me0,a)jamfok v9i e magnetic field caused by this current

  A current carrying loovop-d6x 2 uuk2 :ou5rtp 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, outside the loopvxoukuo2-62rd u t:p5 ? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When viewed5yf i9 2.xpaqeo:bc2vxy89je from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetp.9yq2xa58 e ib e29 vocfj:xyic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field8r qxpj1nm5*i2v.7ag rc (oeqit4t8 g is the

  1 T is equivalent to /nb+zn rgq0ejj3.cc cqp;(k*

  The direction of the force on a curh .v6flkw0.n ky)z8xz rent-carrying wire in a magnetic field is described by which of the followin.kvf 0n w8)khy.z6zxl g?

  The force on a current-carrying wire in a magnetic field wwuhj l 0t ,njvf,u;oapw ,:vt ,9kt-1is the strongest when

  The force on a current-cak-p8viq w0k u /7mr1y/spvo.z3j (vmlrrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current w-vj.:4y fd5u0w(2r0 twaixj;qubfu straight up in a region where the magnetic field vector points due north. What is the d;t bw:uwfx0jqfv4( 0ra ujiy-. 5uwd2irection of the resulting force on this current?

  A charged particle moves and experiences no magnet6 hdav3ucpd+ui7:o /yic force. From this we can conclude3oidvuchu p/ d6 a7:y+ that

  A charged particle moves with a constant speed through a r02f vt*a ca(uxegion where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum w*f 0a2xv auct(hen the particle moves

  A charged particle moves across a cf,7k, x u8s,zgm wh-hsonstant magnetic field. The magnetic force owgmzshf ,x 7u s,h8k,-n this particle

  A charged particle is injected into atr i;cc3+)p1 a9iqlzj uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignorin cqtac9z )3pili+1jr ;g the particle's weight, the particle will

  A charged particle is observed traveling in a circular p6ddy e:c0on+j ath in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular 0 d eyno6:+jcdpath would be

  A particle carrying a cky( c3 bqj:cn0harge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular pat: kn3bjcq cy(0h would have been

  At a particular instant2qx92n r to aktw49rd4, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnekxowt2qt442 n9rda 9 rtic force that acts on it is

  An electron has an initial velocitcx 4r8uhlwb1p ,(bfh 6y to the south but is observed to curve upward as the result of a m1b bhx6 wl4u8r(,fchp agnetic field. The direction of the magnetic field is

  An electron moving along the +x axisc 95 1y(7bvfhjwi up2i,cusy+ enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the i+yfw1275cu v (sipbj,9cyh umagnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-cars ) .tg(t9du btagb)1xrying wire is

  At double the distance from a long current-carrying4myo p(x -g:lo wire, the strength of the magnetic field produced by tmy4l -p:xgo( ohat wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry ident0tt6xy fq; ac +0.dqez/s0zitical size currents in opposite directions. The wire oz/6sza0.d tqi t y+ qce;00ftxn 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 side-by d ja q/a6v2b/pcr+i35e; lcea-side on a horizontal table carry identical current straight towa 5jae//bca2dc3qria+;lp ve 6rd you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry.1o moqrt+oi:zo6/ jr1jsa( a equal currents. The magnitude of the force between the wires is F. The cuis+j 1z 16 q.r jtoa:oaoo/mr(rrent in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the (ff; 0 w-99qhvemjd.m/ mhxx reast. A proton moves toward the east alongside and just south of the wire. What is the direction of the fm.mhej wxh(x 90 f/-9 rmqdv;force on the proton?

  A wire lying in the plane of the page carr08i ;sg,wg othies 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, also in the plane of the page, from your rigs; hgi0,ow8gt ht?

  Two long parallel wires are placed side-by-side on a horizontcs e lbqgz3 m8aa-9n5y *..eqral table. If the wires carry current in the same directiec. 9.l-8yg3qsn *emz aq a5bron,

  Two long parallel wires are placed side-by-side on a horizontal b0h; ktgc*vsqg)* 1hb table. If the wires carry current in opposite dicshk** gvqtg );10 bbhrections,

  Consider two current-carrying circular loops. Both arep:tv (k,ax.pr lw,l22vfb*o y 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 th.( kvbpr f*alt, :lyp2vxo,2we center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-cabiess);uzwv2j * g6ms p;d*13haok0 trrying 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 magnevzet1iss*2)a3 ;god hwk *; 6s0p bjmutic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occu/ re0 y6e 0ctqmudb676n6cujhrs when the angle between the loop's ce6ntc 6er b0uj7qhdu 6 y0m6/magnetic moment and the magnetic field vector is

  When placed askew in a magnetic fielo no+mzf81 ny7d, a current carrying loop that is free to rotate in an ofo+n8zny7m1 y direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentjip6ja7 j;h2kially all electric motorsjj7 ij;aph2k 6?

  A circular wire loop li xa.kopn3f0)z es 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 03z okf.pxn)a table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m andgfj) q6 pxfq 4;zzfsnzy*(.4d charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is dpq 4(4.yjfsz;fz d6qfngxz* )eflected 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 particlex3 smcxt2- 5q,5wc obq passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a straight litc5s2oq xc3,x bqwm5 -ne. 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 aq:u3pqoc5.fi; tyn6luz+12m 5o wj s m uniform magne5mpo;t 6f l 3 jc5qmowi:zyus1 u.qn+2tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in2sl) z; obg/fyh0 ,lgg 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 vj: 1hdjeee0,h/-c m9kklo,z placed in a magnetic field of 0.020 T? The wire makes an angle oc ,ze-: kk hve jdem0/h,l9oj1f $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050 kg and is i9yugypy qna0r;j1 .wl- -l.efn a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic forcyafy0l-j9-e ;. l1 pqgywr.nu e to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.)k(y4(kogcsql wg kk118-huy20 T. What is the magnitude of the magnetick1(wku yhq(sy o-8gkg4c)l 1k 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 speed of) nmjnek ( f8qqj)0jh) $5.0 \times 10^4 \; m/s$ 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 speto-gwirtk4e1i3 fg;8 h 5vq/ged 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 north with kaf jpnh /v4 m72(qlpj:obetk60c8 y0 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*t+6ahzklg 3btyy ) l3 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 magnetic force of the electron.

  An electron moves wit8k .lohh.yiu 2in ,m1ph 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 ldwdsu 5j dzcf:(47n )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 magnitudkjifc6j)brta3 ,nymz; 4/8u/ x c up.ke of the magnetiuu;r )8 a,nj k ccb3km6f./tz x/j4iypc field at a distance of 0.15 m from the wire?

  A high power line carrying 10000yhd 8d 73yvel A generates what magnetic field at the ground, 10 d0ylv 78hyd3em away?

  How much current must flow forig tlfi(76b qp+m *)pf $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a* 9g tel,zzi7 nui8j3b long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strengthglztz3,ieb789*ni ju of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opps maxynl 6/c,,osite directions. They are separated by 40 cm. Wham,l ,/ nysxca6t is the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wirewjz. 1j ak6*ris carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field z6ka. wj1j* irmidway between the two wires?

  Two long parallel wires w)rai(te *o3u i ab.j1carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.2*3b truo) .wiieaja (10 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each cab r46-d4ldw-g4x sg xyrry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of sidesl yrdxdwgb-64-g4 4x 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wir5eg-t:w 4zk zres carry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetice-zkr5 :zwg4 t force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire-wg d0 7oj *rycfhl;*s3-lvku of radius 4.0 cm whe*;h 7-dgkl0uvw-scoy rfl 3*j n a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire.3 s+41uly0mm3ai 3ee0fc5ih1sekwlx What magnetic field is produced at the center of the solenoid when a current of 10 Al cshe35fmel3a ewsxi10uky+4i30m 1 flows?

  A solenoid with 500 turns is 0.10 m long and carries a current ou 57cqp 9hdc/5 mtgl+q cds:hwj2,tyd bq)w+ 9f 4.0 A. What strength of magnetic field will it have /qq55 2bqw7m99h:dc tu+d g)l hp,jdwtc scy+ at its center?

  How much current must pass through a 400q7 hx(:ydjza* turn coil 4.0 cm long to generate a 1.0-T magnetic field at the jhy(:zq ad7x*center?

  How many turns should a 10-cm long solenoid havz(d r3o;9/ubtvoz wd) e 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 thanvxl cmuq0q3 5)mi 5yvbq;sn zv /90*ht carries 6.0 A if its dimensions s5 n/vqnv9lchq 0mmy v *5zbx0;)uqi3are 4.0 cm x 8.0 cm?

  A circular loop of wire of rad.t2 i3:lxocqt g9h5ydtn4- tfius 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 magnetic torque when the plane of the lot:9 l tg-if3tq4o.2hync5tx dop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sewh2ez-9bq0:gxk2zy/m wr 7kectional 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 m0;;-nx edajh xj w8wx6+fj.xof 2.0 A is in a magnetic field of 3.5 T. The loop has an arej man8.dj 6 e; x0w;x+jhxw-xfa 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 i5cklnn7zuuox xj7*h( .iizo .sc 60m,s in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magn .,nchzxo uimcnz7o 6s xu70l*j.k5i(etic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in : mesrb3 cbaqumho(60xbw6:+ a uniform magnetic field of 0.30 T. Theu+qrsb : mbo:e6bwh( c630a mx current in 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 wire loop of aueflig cx bc.+* *-+)naoer;nrea $0.25 \; m^{2}$ 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) has a u5(ir 9a mfdlkr8o,/ hspeed 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 velqfs;m4)a 8k,sjjgrrj t (0*lt ocity $6.9 \times 10^6 \; m/s$ 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 andvt,s 4 i0nkn4g then moves into a magnetic field of 0.040 T. What is the radius of the pro4nvs 40kitgn,ton's resulting orbit?

  A proton is accelerated from rest 9bobunwtus( 1 8xw::beg3q,c through 500 V. It enters a magnetic field of 0.30 Tw938 : g(xtn wseu1bqub ob:,c oriented 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 befor6hnl h9 09xlmde entering a velocity selector. If the B-field of the velocity selector has a value of 0x hm9dnlh06l 9.010 T, what value of the E-field is required if the particles are to be undeflected?