If the north poles of two bar magnets are brought close to each other, the maj2hckdpx /tqw5k3 .vw+s) w 4bgnets will/2)wwjwvb5p3 hcstd. 4k+xqk

  If the south pole of one bar magnet is br/7d monbq jly3e, n 3wi(/(ihjought near the north pole of a second bar magnet, the two magnets wiy/hdje/ m, oqiwj(37bl3n(i nll

  If a bar magnet is divided into two equalahia az j1y(e1mo)1nxjyw -y9eoar2m47b8 b, pieces,

  The Earth's geographic North Polov y0k9ivfl x3i7( ltskisj3t 5 )vd0)e is magnetically a

  The south pole of a magnet points toward n7echz)94-)(zmw0v qmubqakthe Earth's

  An electric current p)izm9h+m -ulc8,xqig roduces

  Which of the followin3jpscs(.y 95m q*b gmig is correct?

  A vertical wire carriasn2. qh3xc*-yj gaam6 -8ekges a current straight down. To the east of this wire, the magnetic field cs--e *maqyk2nah3.x6 8agj g points

  A horizontal wire carries a current straight towar6xr/* b :b5/ ydqcabdad you. From your point of view, the magnetic field caused bybd:yxa*5ar/c/ b 6bqd this current

  A current carrying loop of wire lies flat on a tsssde t6z.bz (j6fr,7 able top. When viewed from above, the current moves around the loop fd z6t. s6(zbe,jss7rin a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circulomhiue)sal)goi*q w6k gw k(/1xi -0 /ar loop 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, inside the loo )x (hmo-o w il/si*a)k 0gu1wqegki6/p? The magnetic field

  The SI unit of magnetic ofb w6 q.s50en,skmt7field is the

  1 T is equivalent tok2/tfdmxcreg +gswg6k .e4 79

  The direction of the force on a current-carrying wire in a magnetic fick: 5 iulu:g 2ede06cheld is des: dc u0ge6 lie5:2cuhkcribed by which of the following?

  The force on a current-carrying wire in a magnetic field is the strongesa: by*1ecj7l dwb 9vs.t when

  The force on a current-carrying wire4)zvkp;aog /nvoh 2 1d in a magnetic field is equal to zero when

  A vertical wire carries a current straight oh (c(-eg93je .6hngut pih o.up in a region where the magnetic field vector points due north. What is the direcgj( . uc-nogte.i6oh(9eh3 phtion of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. c*ijc p7 ygd0 1(+mz-+etyzyj From this we can conclude thaygj0y-jcpzt(* ey1i+czd 7m+t

  A charged particle moves with a constant speed through a region where a unifor l+s 5u4uo5) tgwyxt;bm magnetic field is present. If the ma sogbt)u l;u 5wx5+4tygnetic 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 magnetic field. The magne 5rago/f6*gu r)lvl c7tic force on this prgr 6)o *7u5c vlgl/afarticle

  A charged particle is injected into a uniform magnetic field such that.mypfs3(b,qp w )j(xc its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wil c(q.x3( mjp)pf bysw,l

  A charged particle is observed traveling in a circular path in a uniform magneti(,te-ge mnqvirctq; usy6h1 6h568lcc field. If the particle had been traveling twice as fast, the radius of the circulalh1;56,8tvuiqyren sem -t 6ch6qcg (r path would be

  A particle carrying a charge of +e travels in a circul6if1adw f b ;d9zu;k4gar path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circzi9fga14ud;kb fd6 ; wular path would have been

  At a particular instant, an electron mo5r ,valc23jywh1uc4m.8u ,wgr clvz0ves eastward at speed V in a uniform magnetic field that is directed,.lyw m zgucwhc cjvv81 l,ar3ru04 52 straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to0jho),tbusu4qb)rl m gdnz9/ ,l aq ,2 curve upward as the result of a magnet/nuqb, hl,qg,tuob9a4m 0 2rdl)z) sj ic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there)yjbahsu4/8. mo+ bhz is a uniform magnetic field in the +y direction. What is a)s zbhm hj8yu 4ob/+.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 straigh9xmw d27i rg0mt current-carrying wire is

  At double the distance from a long current-carsc:bo 0ny*ns2 rying wire, the strength of the magnetic field produced by that wire decrs ns* by0c:on2eases to

  Two long parallel wires placed side-by-side on a horizo a xy1m:4vfeo 6uoe4gejt4i*+ ntal table carry identical size currents in opposite directions. The wire on your righfmey4eo4vig1oxt a*j e 46 u:+t 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-side on a hor:z-6:d7 ,rob2 ue ol4nugiz .t la1yvbizontal table carry identical cur ,yno74:ivur z1 ztul6dl-og:.b2 aebrent straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires c kxg;kiq t16;.fw yx/uarry equal currents. 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 between the two wk 6f;gyi;k/ xx.ut1wqires?

  A long straight wire carries current towyyl7v ny *aanff *:o:.ard the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force ona. oa*y ny:lff7vy*n: the proton?

  A wire lying in the plane of the page carries a cu0vu,/jmcu .. uhmhw9b20wi-qbs cx i:rrent toward the bottom of the page. What is the direction of the magnetic fo 0q .-cvm.w 9h: jb/buh iim,s2uuc0xwrce 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-dwegfe*s9vp- : 8o.od bgf,4n side on a horizontal table. If the wires carry current in the sam8fwvsg ,4 feoeo*9dg:. -npbde direction,

  Two long parallel wires are placed side-by-h4(qj-nvt(or6 w i4 m ;6ghxmtside on a horizontal table. If the wir;h6m4w ijntq(6 o4-tmxgvrh ( es carry current in opposite directions,

  Consider two current-carrying circular loops4q8p6k4 dhdm 35 brnjp. Both are made from one strand of wire and both carry the same current, but one has twice the radius ofqp4hrdd56 48n jbp3mk the other. 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-carrying circ y5fmor 1vx*y-ular loops. Both are made from one strand of wire and both carry the same current, but oryo1 y*xfv-5 mne 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 mjk5q* ja i8zf0n9 vv*when the angle between the loop's magnetic moment and the v*9 aj8jim*fn0 k5 vzqmagnetic field vector is

  When placed askew in a magnetic field, a current carrying l1dr3 vm4cx3t x4k3oknlq. pg *oop that is free to rotate in any direction will experiencem r3q3nlx3t. vg4*1dxo k4pck a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all elcvuli0g;:sxt,z8u+ b ectric motors? l8zt ;g0+vx:, uicbus

  A circular wire loop lhyz5 x6e wuk:4ies 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 5w hkeuy x6:4zthe 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 mast :jj+ff 1:taks 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-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, j+ffak1tj ::t and R.

  A velocity selector consists of a charged parti-lzzv aby/*j6pgb7 3nkxmp4e1;bq0ys7 6n g vcle 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 the4y ev s;n3-6qz/vjnblkzgpap 1mgb7* 6bx07y 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 parallnxq 0f n2 rzfnrizsd:a.27;2 ;i:pff ael to a uniform magnetic f2i2r2fz;ann::idrfpq7fnz as.0f; xield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dis2ok(yve :ri /rl+ a1grection 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 5chi;1dq6zn d fqucl-x:zf 38 ;.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle ofnx 1cf:fqziq;-d8ch ;6uzd3l $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long hacoqkde809 0e2 k5 8z czpno6vjs a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to ca0qv ocpk5 n9ec8d z8e ok06j2zncel the weight of the rod?

  A stationary proton is in a uniform magnetic field muw ged ulv-1k: :v+i ;ryovp4hi2 u/9of 0.20 T. What is the magnitude of the magnetic foy v1l +:uepuvu94vg hi ;dm-w irok:/2rce 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 speedazlyf:5z: m kw3y.6 us 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 u dkc:wh6a82e u(o. bv0eph,qspeed 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 j-w,.i q1w /m+obajbrdue 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 p,tboce 5 +tw g5w3dj6of $8.0 \times 10^6 \; m/s$ 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 spes x:9*uso pcye x;+-2o ue:oqqed 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 - uy-001 gdbp .)ao:.ra0u 5c xurel(gv anlsg$3.0 \times 10^6 \; m/s$ 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 tht(mbjx4h(lgx .i :;rt e magnitude of the magnetic field at a distance of 0.15 mrtmx( j:;4l .gh(tbxi from the wire?

  A high power line carrying 1000 A genei);j.a vjko+f*qw + gyrates what magnetic field at the ground, 10 m awy; q vwfgi)kjoj*+a.+ ay?

  How much current must flob5 hgcs8u6 pp 1o6xl:l tx+gb9b tet4;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 o /hu-+/z+ws zxt tr.* 0g;pvqk0gt yeaf 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic00erksv y/z .+qpxwguz/+ at *tg-;ht field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carrj ejb,*g wjd6gxvh*yc968/uvy currents of 10 A in opposite directions. They are separd vg86 9 /cxy*vu 6ej*,wgbhjjated by 40 cm. What 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 wire*(6tl nbnv.9sh+ezw+9m kc pts carry currents of 20 A and 5.0 A in opposite directions. The wires are separated bzhv +m+s(t9. k6l9 nc *npebtwy 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents ofmb0 xsq oc19:a 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point bebmq 1xao90s c:tween 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.+,7syef,u +ycnz( ons They are parallel to ye7cuy,o ,n+s (fn+ zsthe 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 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 opposited4+nd ; luhg2t direction. The wires are separated by 0.30 m. Find the magnetic forcehld4 +t2d;ung per unit length between the two wires.

  What is the magnetic field at the center o3g2ceq:kkem ; f a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows i2qkeg 3:c;emk n the wire?

  A solenoid 20 cm long is wound with vg 5;fzf7l cu;5000 turns of wire. What magnetic field is produced at the center of the solenoidz;ugf5 ;vlc7f when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. 5yu/, a-,hzizacj + cjWhat strength of magnetic field will c+ha ,z5y i,zcaju/j-it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a 1nvpkx2vde 6,j-63pn xjaq11g.0-T magnetic field at tpx d1va,v2kqxep j n361j6-nghe center?

  How many turns should a 10-cm lzs5o,o( 4gpo6x zofw( ong solenoid 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 turns t dkmbouumbi0w 9a(28 9hat carries 6.0 A if its dimensions are 4w9i02a kmb8dmbo uu(9.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic7cnk bk flgi81:ete8 ) field of 0.30 T. The current in the loop 8tl:1) cei 7fekknb8g 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 o9/wx7d7e7 vczmzy uhxc+m )w.f cross-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 j7y0 uk uarcuev;x.e5rq8 +x (field of 3.5 T. The loop has an are87qrj.5xeeax+c ( rk 0uyu ;uva 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 is in a uniform magot+. hing4 nd/netic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plaogt4n/h nd .+ine of the loop is parallel to the magnetic field?

  A circular loop of wir;05919dmy a xs(t9 o0qfv1wsozvoxk re of radius 0.50 m is in a uniform magnetic field of 0.30 T. The cx fss 0vod915 x;tmzvo1o9kwy0a qr9(urrent 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 ocvb)ax h z:l.4m;1ssmd mgz+1f 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 spectrometenj3 xbrhc 15p+r, a single-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 gkmf5vf(r7 q)8o lilh*tm ;x(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 1.0g5jl5om :wlz :0c/oks kV and then moves into a magnetic field of 0.040 T. What is the radius of the protog loj5:l5zo mks/:0wcn's resulting orbit?

  A proton is accelerated from rest through 500 V. r*ssew;1uwia:(ptvt)6 lbb+ It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motio:)6ritwwuve(+ bs*tb ;a l p1sn. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential diffehs. )j5ty t1lw(prhskh yr*+aia 9f 14rence of 10 kV before entering a velocity selector. yi 4f5asth9jy1t1rwr.+hl)hkp*a( s 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?