If the north poles of two bar magnets are brought close to eac0nemig;a8 ma xfq 7/i2o:pu+r;j ) iaqe i*a6dh other, the magnetsp2xr da+o7;a f 8 :)emqmi0a;/gani*eiiqj6u will

  If the south pole of one bar magnet is broukp3z ha ;/2rdught near the north pole of a second bar magnet, the two magnh2a/kpd ;r zu3ets will

  If a bar magnet is divided into twu4u7v1i ha3qhc 4kext0ae1(7w( kaez o equal pieces,

  The Earth's geographic Nd5: jr/ 74+d :j-mqbvyxu 7xayen7 twforth Pole is magnetically a

  The south pole of a magnet points toward the*ze4 v/jkmfx:q m5ga v44dv/y Earth's

  An electric current pre 8 mmyib51b5k)z2r /0am,ghct 0 mfrjoduces

  Which of the following v hp,k2171rxv5hrro xis correct?

  A vertical wire carries a current straight down. To the ia a*qr s,e7eb*0m4qj east of this wire, the m* mq*ae0b4r7 q,e ijsaagnetic field points

  A horizontal wire carries a current straight toward you. From your(om -k 3ijznk7b*+et s point of view, tn+mzek *i -7bosk( 3jthe magnetic field caused by this current

  A current carrying loop of wire lies flat on aw-w- b,wg- y;tkct /wn table top. When viewed from above,wy/t- n-c,bwk; t-gww the current 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. Whe wq/z rzs t9h+/l1*ezln viewed from above, the current moves around the loop in zq l+sr/z h */ewtz1l9a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fi.a.x3sno ilzvw5, rki ws3 jzet g51*9eld is the

  1 T is equivalent to kitqp*8; wv/ebv3go0

  The direction of the force on a current-carrying wire/ 4b:c*gtf.0vt ptuyo in a magnetic field is described by which of the following?bf0ug.*o tyt:t4/pc v

  The force on a current-carrying wire ins g) 3 ,z6n -4iwll/tsurqs8nm a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zehbh1 ykx.kuiy3myat0( x 9-2fro when

  A vertical wire carries a curren/c8-l k/hi7. o 2dvbccffh *t+n(woqwt straight up in a region where the magnetic field vector points due north. What is the direwf. wdock-voln/ 8 hh2/t7c+*i (bq fcction of the resulting force on this current?

  A charged particle moves and experiences no magnet)gqy+bcuoih0av+y bn:/jz( 1 g)hjw* 0xjb6 jic force. From this we can conclude +ujgyc1/)nq):xhibjj bjo* zg+wv60 0 (yhab that

  A charged particle moves with a constant speed through a region whe3xg2 zq nz /*cupy:h3fre a uniform magnetic field 3 / yqn23fxch*z:p uzgis present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magneb/17nzb ;e)(l9ewd hltmr 3z ymr3c2ztic field. The magnetic force on this particle z()bn7 2ryhe rzdztm1;ce3b 9lm3 l/w

  A charged particle is injected into a uni1ribhpux5 k 0f-5mclce 2w0 2 jkyb1)pform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weief-y k1c5 w pupi0b02xmc hbr1lj)2k5ght, the particle will

  A charged particle is observed traveling in a circular path in a uniform maxwdt5;e p3w1 9zjvfs- gnetic field. If the x-w5j9;t1f wpsz d 3veparticle 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 inc6e 0 wlo; h4/amv, 9qf8jbfzj a uniform magnetic field. If instead the particle ca,8cm oqw zj6;4v jh9b/f0alefrried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron ml:7o3 (.)teua+b z p0lhxm dseoves eastward at speed V in a uniform magnet bh3elxld + op)7s:u(a0mze .tic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velok wqn1e w.clrn to)i3*e y red;7qxr2st8),3ucity to the south but is observed to curve upward as the result of a magnetic field. The direction,2k)rxw7oe1eq8c)ns.t3t*udl3rq; ynw ie r of the magnetic field is

  An electron moving along the +x axis enters a region where there is enh-/m;my z+ct0pp b8a uniform magnetic field in the +y direction. What is the directiobn zphcy/+8mpt; -e0mn 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 sw8f o2lwputci; 8z.qp8dd )+ ptraight current-carrying wire is

  At double the distance from a long current-carrying wire, 9-d do 1l ylapg/z4)xx7q /ylgthe strength of the magnetic field pro/gxd7 /4qxg l1l)ylpzayod9 -duced by that wire decreases to

  Two long parallel wires placed sid a,gekm0 v4,sne-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 gna,se40k ,vm the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on tgozi(qa, do .) gbm(3a horizontal table carry identical current st.(qma,3o b dgi (g)ztoraight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of d71j9n g9mjhz5 yt ml.the force between the wires is F. Tl9jm19 n5 ydghtjm .z7he current 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 tvk kk/4)sp)i 5/qrksg uo8u,x he east. A proton moves toward the east alongside and just south of the wire. What is the directq,u sp48rv / kukk oskg5x)i)/ion of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bo p8lw1z/k0i.6-zu fmlasxj* lttom of the page. What is the direction of the magnetic force it pr l-.lz1amwxkzs p0 if86j ul/*oduces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wirq,d 2b aa)tyv5es are placed side-by-side on a horizontal table. If the wires carry current in the same directi2adt )5ab q,yvon,

  Two long parallel wires are placed :hz)tl6o4 nxi zarzk)n0 5q eyet2*y9s5a /mwside-by-side on a horizontal table. If the wires carry currwx*i 4t9 rh/0anyaz lm6z2)z k o)5n:qyees5tent in opposite directions,

  Consider two current-carrying circular loops. Both are made fr44 (ra c.a /*otz*ib,v qmidtlom 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 larlc4. *bovita dqt*r4 ma,(zi/ger loop is

  Consider two current-carrying circular loops. Bothr33j uz2js gnq+mw/z 6 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 sm3zsgnr+3 u zmj/ 6w2jqaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the+n6hbe ,j9b s ,ihxu1g angle between the loop'sb6bjg +h, ,is9nuxeh1 magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying looppsq6egv u: (7q that is free to rotate in any directgq(epv6qu:s 7 ion will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of e+e7 t lu ,awc*pt3tqv9ssentially all electric motors?3+ut*tea79cvq l ,pwt

  A circular wire loop lies in a horizontal plane on a table and carries curren4sn qome: 5hufu gv)bthg5:47h/, rert in 5t,evhun:ho 4er)q4g 5u :gbm/f7 sr ha 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 with the magnetic field?

  In a mass spectrometer a p.gzoer0o qh-7a 5f)zarg +b8sarticle of mass m 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-ci.-zqsa+ h8zrbefgog)or 7a5 0rcular 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 consistcd ,s95le 6 oorxng(d2s of a charged particle 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 line. In the following, disregard the magnitudes of the fields. In a velocity selector, the particles move toward the east, anddo52sxo,9le 6rcgn( d 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 ogabnr3 pqct.y :7i ( q57;wch8wminx 6riented parallel to a uniform magnetic fien3 rgq;cpm 6t5w. ny 8w:7qa(chbxi7 ild of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directioned+ a*nv57joe 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 isc hm*-mu8tx rz *wm9pf9e4 w)d placed in a mw u9m pwe 4**z9tfmm)8chxdr-agnetic 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 sb9dvrv*o *z t/ , wa.zzff3;lof 0.10 T. What minimum current in the rodbfsatovvzlw* 3zd.9/rz *;,f 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. Whanpl znhi0:c :/)wjtps( b ,s;xt is the magnitude ofbnpt(js:h)w:n/cs x,zilp0 ; the magnetic 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 speeg7b7cyj0nwdukn; qd4rrz 8 3 7d 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 speedt 9x bx-n9v*of 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 travelingveyz02xajd d ys.nmk w+2 i1+8 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 ab g)1/n -misfh 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 with awi(:d.g b:c;q oj8t 3qm bnng-w p3z4r 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 speedvq2y q( /od-7npar.n x 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. Wh2-yu6 ,9 :2 /nfdzit2ixx umev( offsmat is the magnitude of the magnetic field at a distancu6oe (n2 mxii- m2zyfv/29 du:xftsf, e of 0.15 m from the wire?

  A high power line carrying 1000 A generatb3m * i-,p/arlz ydb-hes what magnetic field at the ground, 10 m a3-p/-mi la*z,hy bdrb way?

  How much current must flov 2 za+b;cle;fw 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;vzesl n3*;ae.0 A is the magnitude of theenv z;es*l;3a magnetic 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 cuybbh) 4,cv j rz6v;bh;rrents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of t; ,)4r6vbvyzhjh;b cb he wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry curree2bvor8t-+og nts of 20 A and 5.0 A in opposite directions. The wires are sev t2er+o-gbo 8parated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A anb 8x*c ,s3zimnd 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the*zc,is 8xmnb3 two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. Thexfq62pi y**6d mz ymn6y 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 ffyz py2*mn66m q*6 dxiield 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 direuv7pusfh4 q ,hesq h :16a30jjction. The wires are separated ,p hje s j 1vuqsf3hu70aqh4:6by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic/7x fww:r3 ffbds:la ( field at the center of a circular loop of wire of radius 4.s:wbf(df /wxfl7 3ar :0 cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wouakyr0 ;yj31rsgw4r-m p( w ege .h*qkecq( i)6nd with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a curre)rmk 4ywr6 .1icsreg(j;k- a0 p*eygw3(qq hent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current) rytncahac/p330ah6;, jat p of 4.0 A. What strength of magnetic field will it 6/cpyht3cp0a)rj a n,h aa;t3 have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generaocupi-*90*(e nll ft fte a 1.0-T magnetic field at tu o* *0ffcel9i(lp- tnhe center?

  How many turns should a 10-cm long solenoid have if it;id.)ufvlmp5gvl j) kt95+hk 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 66agsu9jv-c ee9e4xh that carries 6.0 A if its dimee 9c agvjes9xu4h- 6e6nsions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magneticb )yn(keshw c 64z,;t5 ab8ks1m4 vgyp 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 perpendic )ep4 v5w;6 s1,han(kyby 84csmktgzbular to the magnetic field?

  A circular loop of wire of cross-sectional arv mpja :r8x+m4ea $0.12 \; m^{2}$ 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 gc7a7j*n jp0sp)7 qa ;5i wfgea magnetic field of 3.5 T. The loop has an a)57pja q nc7;fej7g ps*wgia 0rea 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 wirep)rpuudw5 a1 bhm b)0+ 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 magnetic torque when the plane of t)0w b+)prma1dbu phu5he loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.5l,ebp8 czqur7p -7r n40 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 pae77,z -4cbnlppr ruq8rallel to the magnetic field?

  A circular wire loop of a v1g: 1te)bkrsxviu2r jy-m .)l;o7lzrea $0.25 \; m^{2}$ 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 partic , jr2uouu4( :sse9dv8f 7kmgvle (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 veloqbxq1/ -mfd;kqnd 9 ,zcity $6.9 \times 10^6 \; m/s$ 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.*eop j(fq/*pc,v r fxch.pq9+u4 bh; b0 kV and then moves into a magnetic field of 0.040 T. What pfrf v. *b( q;cpp9cox4, *qhjeb+/huis the radius of the proton's resulting orbit?

  A proton is accelerated fromvmg+oh+pgt:)pb1w q0 rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicu: wp pb +0+gmhtqgvo1)lar to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated th1wgw grug/:(9ppb j 2krough a potential difference of 10 kV before entering a velocity sepw9 2:ugg(/b1kpw r jglector. 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 to be undeflected?