If the north poles ofb:k lpj+t6ji( two bar magnets are brought close to each other, the magnetst(pj6l:k+i b j will

  If the south pole of one bar magnet is brought near the*z(psa-ikilrwa2s;z6w f 1u 6 north pole of a second bar maaa1szl -p6i(kw;u wzs2ifr 6*gnet, the two magnets will

  If a bar magnet is divided into two equal pie,jim6*qvc /+loqsk 0cxa1u 9 l;0mtwdces,

  The Earth's geographic North Poco4f7 c4ewk 33nfz,jj l1:skfle is magnetically a

  The south pole of a magnet points toward the Earth .1;brjh4yko q's

  An electric current prkms 5jgx/jx3kydmm9a : u m ):m:w/t5coduces

  Which of the following isyxr2en2lz6h23 ign * o correct?

  A vertical wire carries a current straight down. To the east of this wire, the y8d:sxw( rums mp6;0 8:ucmthz)fqle3 ev) z. magnetic field px83c6le)fs0.8 ;ewtmm:z :rh puys)zd(v qmuoints

  A horizontal wire carries a current straight toward you. From your point of v nkc:t:.(qh o. c1njetw9r rj1iew, the magnetic field caused by this curjt1.r1ro9: :.(enj nwhq ctkcrent

  A current carrying loop of wirxnysj20dz )67h+xe uee lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the dire sz h2juxy7e)x ed0n6+ction 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. : g9rbncdcp/kt,:p6 m s pq3w5 When viewed from above, the current move mp s,96bnrkc:w :ppd53qgct/s around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnett:ct+ ( s/tofvf7kxq ,)old 8tic field is the

  1 T is equivalent toxzgdba+mqea;*o 0llfb6+ .,d

  The direction of the force hxx(y 1v) imcr:c(oc+ on a current-carrying wire in a magnetic field is described by which of the followi+()ciy1(hc mxcxr:vo ng?

  The force on a current-.zvv*k6u- - zsmqo 3ttcarrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnet0o /// lyr/bzoplx4h sic field is equal to zero when

  A vertical wire carries a current straight up in a regionwq;o8 b,q ib4z where the magnetic field vector points due north. Whatbzq, wb84 ;iqo is the direction of the resulting force on this current?

  A charged particle mo94ookg s 0a6hoves and experiences no magnetic force. From this we can conclud 46 goh9skoa0oe that

  A charged particle moves with a constant speed through a redyk;v d k;ct/u+m i2jkm*vozc+pbg b4t-)d. (gion where a uniform magnetic field is present. +gk pmkckijou-;btzd2 .;* dcvmydvb /)t 4(+ 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 co/ l7c:dm: m;w- vubjvqnstant magnetic field. The magnetic force on tjl ;vbwudq / :7:mc-mvhis particle

  A charged particle is injected into d+7rdvmo;6xqi tb8 s 9a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vectod s8 67dm qbo;xr9+itvr. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling ins:o*g9 zl m*ps a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular pa*sm psog*l :9zth would be

  A particle carrying a charge of +e travels in a circular path in a uniform magnexi,ze/z-gm6 b tic field. If instead the particle carried a charge of +2e, the radius of the circular p ,e-/x izmzgb6ath would have been

  At a particular instant, an electron movesh te38p:ri 4t0u+jxvzz 4q:gn eastward at speed V in a uniform magneti+n84e0hjrp 4 xt:itq 3vzz gu:c field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwjyc1a suc( gtew3u-;b3(ia/m8 f4 nf nard as the result of a magnetic field. The direction of the magnetic field 3 bg y e(aujnics4f/wc1t3fn- (a8;m uis

  An electron moving along the +x a.gyxb d+:;:hyn1dnm0 bnlg /3ku g5ugxis enters a region where there is a uniform magnetic field in the +y direction. What is 1by0u+bddn y5 n g/mhugkg;3.lx n :g: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 straight current-carrying w.2v:wocpepadi 6y p.2 ire is

  At double the distance from a long current-nzah; zhvz2;lhw 01,w carrying wire, the strength of the magnetic field produced by that wire ; h,hzlw1; zhawvz n20decreases to

  Two long parallel wif l kj 804b kb:9ehg;wd8-tec:9zsj 4iwmh p,kres placed side-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. Fromhtbw:f:8k zbljgk;mide,4 es0- 4khp cw89j9 your point of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed sidnn7h/xhd gf5r, :pl+oe-by-side on a horizontal table carry identical current straightr g ,5 +/7lofph:xhndn 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 the force 1 p u7w v)q8of)2muaw2g hjpt6between the wires is F. The current in each wire is now doubled. What 7)t1w82gmp)foq u uahj2v p6wis the magnitude of the new force between the two wires?

  A long straight wire carrie;a)s lrl1)c dis current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the proton?r1sl dl)) ica;

  A wire lying in the plane of the page carries a current tofu7;j e-;y( wkzu4edrward the bottom of the page. What is the ;f-7;rud(kzu 4 eje wydirection 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 right?

  Two long parallel wires are placed side-by-side on eq x2m)fnx-1k a;d9u(tnp,bpa horizontal table. If the wires carry current in mpd) tunqn9pxb 2 1;kx(,efa-the same direction,

  Two long parallel wires are placed side-by-side onm4vfbc iw f+ 23w/3bap a horizontal table. If the wires carry curren+4afw cfwmb3 ib/23vp t in opposite directions,

  Consider two current-carrying ci3wx0.;mtbtt rl;td3w3s ci7zrcular loops. Both are made from one strand of wire and bothdl.twt;r7w;s3 z bt i3xmt0 3c 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 is

  Consider two current-carrying circulab8ehxsq2dm5:4d:r 0 43 oy k-qpc ammfr 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 momeq de0s4kpydb:r-35 2f8x ao hmqm mc:4nt of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carryik/h +2tn dsn mplwu1dy .pv)1;ng loop occurs when the angle between the loop's magnetic mome /tm+ddu12.nyks1wph v )ln;p nt and the magnetic field vector is

  When placed askew in a magnetic field, a cuwhps q1jjb:40eo 3yv5rrent carrying loop that is free to rot0qj1hvo:sje 5 pb4yw3ate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentialmqs2ye,gv 6a0 ly all electric motors?0q,ev6mgsya 2

  A circular wire loop lies in a horizontal plane on a table and carries curreny 01pn.bp c ikwb 6;h:x9z;aiht in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips below ti1kn w0hb.iay6p9 :x;phc; bzhe 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 lo 15 sgmwf3j.se;ln cls2sx*hb ;(r9particle 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-circular path of radius R. The magnetic field is uniform and oriented perpendicular to the velocity of t2s5mllso. n3(;j;gl* rfse 9x scw1bhhe 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 through c9cw:o+ j 6n zy)kadv)lrossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only parowzjdvcn6a 9)+ k:y)l ticles 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 a uniform qt a2.iw (yk5hm22w )m37p.eadbjv xq magnetic field of 2 (h5dvaq mq .my) 7wipe2kj.a32wtbx
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current (lk bdz w14*2wvn 1wwbq(m5lsy p)m6 mw o0z5dof 10 A in 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 mu2uadzy(jzz/, p2h)0vbj;0iu ttku (w c57 ymeter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle k 5tz/c7uu0(zyv)pbt,ih j ;way2uujd 2 zm(0 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 and48 ni y/ph.zst is in a magnetic field of 0.10 T. What minimum current in the rod i z/sp ny.tih84s 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. What nmk7 n1fc0tjyq784ux hyg 7e5is the magnitude of the magnetmgfn5y07 7 enc8hq1 jxu47 yktic 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 (1nb7d pklkv6 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 speedunl woqp59s t8 u,+i 0:t*niho 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 travelingy:x mgf ,jc7hx0:aj c+ 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 speedp+x ax+9raww 8 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 a spee: gb5 f+0-1wobt .admpz-n xrid 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 2x )5fz0xnvrozr .tq o;kcx,zk yg:20 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. Wha0ilcy a*,u7g8vd y ru3t is the magnitude of the magnetic field at a distl7du * c yavug0i3yr,8ance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the grov26 0sqz ad1cnaw,syjw vo*,6und, 10 m js,*vs06 yd wq26wanz c1oav,away?

  How much current must flow bea,dokcdt k)-*z 0z:lj(o:tq *7 dgbfor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wimjqh tmz *6 6jswo: az48jy6++knk8nire carrying a current of 5.0 A is the magnitude :z+w86jkn6y4 +hzmoj6*m injtksq8a of the 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 currents of 10 A inzkzd -x8r3lt)x t.(j 4fk:ebw opposite directions. They are separated w3kz)kb d :-f4jt r.x(zxlte8by 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 wires carry currents of 20 A and 5.0 A in opposite directions.5 mgza.4ofeqgac((4xzb+i bu;a f0 5fx azuqo;f+bag0m( fi 45 cafg(45z.be The wires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directi7miaiaq cu e ax13o+aynz(79n4 3oa(ions. The wires are separated by 0.20 m. At what ya(qan 1e3+axini i3c7a9u( a 7mzo4opoint between 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. They are parall2onw8c ej9cy/ 7j53elrgyv6xel to the z-axis, and they pass through the corners of a sxoce6c 9/ yj32vwly jen78gr 5quare 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.qo0u tu-/ df4j0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per /fu d-q0 4tuojunit length between the two wires.

  What is the magnetic field at the center of a circular loop -k5-)rpa qna b*m z;nqof wire of radius 4.0 cm whernqa p zaqmb *-;kn-5)n a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fie1t6 rscm:bv 0old is produced at the center of the solenoid when a current of 1:vb06sco 1m tr0 A flows?

  A solenoid with 500 mejv:+ *xww;t w 66:rr)wkmrf-p9sh gturns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at itwxmvr h:ww9 ;-)s +:r 6jf6r*kmwt egps center?

  How much current must pass throu1) ,b/ upb zhjsm;z2xgp6djb;gh a 400 turn coil 4.0 cm long to generate a 1.0-T magnetij 2x/,j;bzm16pp z ;bgsb dh)uc field at the center?

  How many turns should a 10-cm long solenoid have if it is to gener )c92qav8paj q3f3emb fa lh88ate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular lonjd(b.m*o y/ rop of 120 turns that carries 6.0 A if its dimen/(rm*b. n jdyosions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifor3yhff30 ij yp( .+mreim 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 perpendfy mrepi+f(yj3ih 3.0icular to the magnetic field?

  A circular loop of wire of cross-sectionalx+wlf/ztu(eu,o (k5 lkc)d8a 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 ma9hnr.5olix 1wgnetic field of 3.5 T. The loop hohri9 .l5xn w1as 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 isgoruvml;prveyc t 4;)n 9://kg8-u r h 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 paralrv-)vu/ l9p4 gmghc /:n;et;ur8 o rkylel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniformkja tv3 ;ev 39*zxhch/ magnetic field of 0.30 T. ha h k z3*/ejc;9v3tvx The 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 area h.3rh/ao54/ ;vd fk omn6arhp4c d 4tu$0.25 \; m^{2}$ 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:i; roi vg *,sib3u(ln 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 (,ewz; kmvxy) with velocity $6.9 \times 10^6 \; m/s$ 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 thrdlk1)goye.t9+u /idl ough a potential of 1.0 kV and then moves into a magnetic field of 0.040 y/.g d et1u)9ld+ lkioT. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of d-a8nyd l5baou m, g*/0.30 T oriented perpendicular to its direction uyld 8- 5 odm/agba*,nof motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a po;cnj)en7nixr vh 4-i6tential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T,niv)ih re76 nnc4x;- j what value of the E-field is required if the particles are to be undeflected?