If the north poles of two bar magnets are brought close to each other, t/ 9fdjj x:nxmc;fq(v2 dp; jz3he magnets wid 2nf m;xzfd9x3jj/vjc:(p;qll

  If the south pole of one bar magnet is brough+zd;xjd :kk0k t near the north pole of a second bar magnet, the two magnets wil+x k z:0k;djdkl

  If a bar magnet is divided into zcn8h.d ik58z4d wap6two equal pieces,

  The Earth's geographic N5538:v9xosnw 9.egea1b wsm w)iuihworth Pole is magnetically a

  The south pole of a magnet pointsf;fhak ,p/+ ,i j 4qghcqul3z1 toward the Earth's

  An electric current produc+;d5c, oufir 13c wdqaes

  Which of the following is corre1joz7e n 0ttj+ct?

  A vertical wire carries a currek4 xhs o w543w/xa5gnvnt straight down. To the east of this wire, the ma54 /wx34gak whs5 onvxgnetic field points

  A horizontal wire carries a current straight toward you. From your pointrj xvd n:x 59szr0yl7+ of view, the magnetic field causex szdy 0jx:+5nl7 rrv9d by this current

  A current carrying loop of wire lies flat on a table top. When vix) oal o6of4c 0kkd4l-ewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this currenodk fl4lo0k ca)-64oxt, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a tableay w 4)cagkb jw6i/ho m0k7,j2 top. When viewed from above, the current moves around the loop in a counterclockwise sense. W/mh7 6j a4 0kowyjkg,b w2i)cahat is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is th/lc6awr*8piymhsdr x+ g3 -z-e

  1 T is equivalent top1dj5ub)c4 ey j;z .dy

  The direction of the forcxa qnc /s9 sc)z7j3 nydt.gg(yvvyhl,v -1 )2je on a current-carrying wire in a magnetic field is described by w9c/7v3ns (c1 s.g2vjnyqy v xhdtg -)yjza,l)hich of the following?

  The force on a current-carrying wire in a magnetic i(y4c . cjf/kjaxi) u1field is the strongest when

  The force on a current-cb:ma :p3ilv*,j+u syhh h/s*x arrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current stradr-wkw,*3ohm kowm ;6ight up in a region where the magnetic field vector points due north. What is the direction of the resulting forc*wodwmr 6hok; 3 w,-kme on this current?

  A charged particle moves and exq z5w,j, rx*j *1vkdbiperiences no magnetic force. From this we can conclude tha v*i w5j1*,bjxrkd, qzt

  A charged particle moves with a constant speetr7/ (m tzxj - ./yld*ntph(lyt;sc-nd through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum whery 7x(( -ct*dp.l-nl/h;tnjtm/szytn the particle moves

  A charged particle moves across a constant magnetic field. The magneti:g (t )xsj3g yjep zg1)cgh( x,ez:u3ic force o teig(cgg ,1ghz)xy:sj:3e ujz3)xp (n this particle

  A charged particle is injected into a uniform magnetic field such that its velo3isn k1b.l0 s/dd)pnv.q pztuyl b r h30(x4y*city vector is p ( 03y0vkl 3 rzb.dsip4bn*).ps/qxdt 1hyulnerpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in c,g5bty,*f/;ng al n)t 2o 1alfzcp9ha circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the nl agcal/boty9;5c,t n1h2f,* z)fpgradius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magnd4d1+qy wl hbp/h(da; etic field. If instead the particle carried a charge of +2e, the radius of the circula p1+ddhlw ;daq4 y/h(br path would have been

  At a particular instant, an electron moves eastward at spee dbas q1nby+)xt: 97g(le8ke fd V in a uniform magnetic field that is directed straight downward. ef+ xytbd98q)1n e(:a slb7 kgThe magnetic force that acts on it is

  An electron has an initial velocity to*1 t/ 0d9chpkbsl *ieqaljh-7ykpx05 the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic field jq70ll15 *yx9ehpa t ikd0skp/-bh*c is

  An electron moving along the +x axis entey ah:pr7iv*4 qrs a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electrory4q i h*:pv7an? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-c r +wt1yb(t8qjx(q8searrying wire is

  At double the distance from a long current-carrying wire, thec elmg+yv7wd; +)u rqb utn36* strength of the manyvc eugl+ uwq+76rt)mb*d3 ;gnetic field produced by that wire decreases to

  Two long parallel wires 5q*exlmef 2 t.emu01 fplaced side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on youf*1 u2e emf5mx.tl0 qer 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-side on a horizontal tablxmbsnv(x.21 tk f9b -me carry identical current straight toward you. From your point of view, the magnetic field 2x mvmn(.- tx9ks1fbb at the point exactly between the two wires

  Two long parallel wires carry eq35.oyn6nfow zri ot3z/-j; jx.u;fk hual currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of / j3. -jhoo fruy3t;zi .fknn x6zo;5wthe new force between the two wires?

  A long straight wire carries current toward ss.-gq qb(7 bc/ysdcys01ca; the east. A proton moves toward the east alongside a(7y-c cscd 0sy;b sasbq/gq1.nd just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward thezu1mqps.s. / t bottom of the pqz 1..su tms/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 right?

  Two long parallel wires are placed side-by-side on a horizontasmmz*3ih 8)+.gfsq ysa b 5l+ul table. If the wires carry current gmsfshm*q3.8+alzu)y bi5 s+in the same direction,

  Two long parallel wires are placed side-by-side on a horizs 39u6lyyo .d5qsdk3zontal table. If the wires carry current in opposu 3zol96yd5y .ds s3kqite directions,

  Consider two current-carrying circular loops.3*pe ziayr+ /cy dol4x*t)**7w dw. t0oaytae Both are made from one strand of wire and both carry the same current, but one has twiceitacd*7adyy x) 4pa0elwr/*yt*+t3 oz *w.oe 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 circular loops. Both are made from onedpi+-hb ki:i,oi/wh5aj tb( 7 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 smaller loop, the magnetic moment of the larger phjihi7oikbb+(:da 5i- , /twloop is

  The maximum torque o7 vrw6d(qmi 0gh;ym9k n a current carrying loop occurs when the angle between the loop's0 gmdmw6vq y(hk9;ir7 magnetic moment and the magnetic field vector is

  When placed askew in a magnetic fiel eh-w-8(gnopd d, a current carrying loop that is free to rotate ing8-wdoh pen- ( any direction will experience a torque until its magnetic moment vector

  What fundamental fact unduux7/qzp-1lj h, 0rhzerlies the operation of essentially all electric motors?1,h-q 70jrxzlz pu/uh

  A circular wire loop li8t0xip *u /thqes 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 table because of the torqhx/*u8 i 0ttqpue caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accele38.7t q+g jhhtiywines01(e9b jmkz4 rated 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 mag(ehyg i 3ze 84kq7.mws 0b19hj+jtintnetic 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 through dxj5q1 2w.bjyb 05agscrossed 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 .d gqxa0sj521b5 y jwbvelocity 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 ; ee34fy (*fow:eeqc 5kjr/mvuniform magnetic fq5/ejw 3kf(*re:; v ceoym 4efield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dirl xfvma fo(wqi*:/- o(ection 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 oj4 ,*zvzksu.t o9tk -cihb5 (straight wire carrying 5.0 A when it is placed in a ma(*- oioc5zjk t 9szkvu.,tb 4hgnetic 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 0.0s4l invm+k: a550 kg and is in a magnetic field of 0.10 T. What minimum curren4k+s nla:miv5t in the rod 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 2 ujmwy5dzv ):0.20 T. What is the magnitude of the magnetic force on the prot25dzwj: m )yuvon?

  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 ck2 ei4*pzl1v 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 6hp;.zfao :lb j1 m.8h8zzcp ra speed 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 d -/nxdyx-2c+bco ((;cjbvfi fue 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 s+jt6 xu+m icnvx1u:2 opeed 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 aeipcm5cf 3a8oi2 b: aqw7gd.j n 1oa,t/9ca7i 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 obf ,u+.q9ey *d eqj-hdf $3.0 \times 10^6 \; m/s$ 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 cu 1pbsm-oso9oq;q x ;r6sb;es7rrent of 25 A. What is the magnitude of the magnso1;b;9-;7oeq b6xspsmrsqo etic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates wha4c h 4ypnoh.3kt magnetic field at the ground, 10 m away?nhc4 h yo.pk34

  How much current must fw0rj4xh8j qtgygd d r 0c368-nlow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a lj;ql,k:x g4fc ong straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the jql cg4:x kf,;strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currf. 76xl zjey96ud k-x wnc) 4oh(3mfk(qmo+xhents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field i+y(f lxoxh( )9.kmnduc6k- jheo437x6zfwq mn 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 oj1 (00 shha4lkjlgjf 0f 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the twl(sfh j0j 0lj 40hgk1ao wires?

  Two long parallel wires carry currentm/uz bx.;:kgt70*q 2ds9ysiip hw u0ls of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from tiduw 0tss l7/mqz ixy*0b2g:k9p u;h.he two wires the same?

  Four long parallel wires each carry 2.0 A in the same dir yif+ p:g.kq3.ak6vr eection. They are parallel to the z-axis, and they pass through the corners of a square of side :kkg..qfe vai+6py3r 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 ca31hsxkt8)y8:7v dm3vs d;u4v/lvqo 5ii cibtrry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic forck :/ vbi1sm87cq hs4ud8)y ot v5lv 3t;ix3vide per unit length between the two wires.

  What is the magnetic fn l.rz1ea4s3f *btv- sield at the center of a circular loop of wire of radius 4.0 cm when a currenb*.3lv -z nrftas4 es1t of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magxs(e lc ap1zlf8: n((mnetic field is produced z( efcall81ps(( xmn:at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a cm e2k9b 42+vdxha 5becurrent of 4.0 A. What strength of magnetic field will it have at ib9v2e5+ h2 akdx4ce bmts center?

  How much current must pass through a 400 turn ciu8heuzn 04k2 ze, (rqoil 4.0 cm long to generate a 1.0-T h4z8u(r0nuki z2 e, eqmagnetic field at the center?

  How many turns should a 10-cm long solenoid hav9i* *uw kcpq sdh0:gk2b5z eo1zg,,cy 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 ijb/seax -;: q2r)nwx turns that carries 6.0 A if -bewxsr)ji x q:n /;2aits dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50f.lv( sz 53dcl 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 perpendicular to the magneticdvzs3 ( l.f5cl field?

  A circular loop of wire ( 3bd l64 u:q;rqp ihs-0(u0gkfi zeh4-uyecpof 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 carryy9a0u yje-cu5ing a current of 2.0 A is in a magnetic field of 3.5 T. The looucy uye ja0-59p 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 is in a uniform magnetic fieldm;7z/ ,7nlxh6 v6:a:x+jixb bdtd na rta)f *r of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when thebr 7xd d+a m6hl:i,x a*r/vn6:j7tb;xna)f tz plane of the loop is parallel to the magnetic field?

  A circular loop of wir5ppf4a aa-v;h r* t(c+idkf8se 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 the loo-pcfkr+;aviad 8as4f 5 *(hptp is parallel to the magnetic field?

  A circular wire loop of ar fgpzxix:dyo 0 /7zkkd b:,a9,ea $0.25 \; m^{2}$ 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 (charg1z n/o/ dnoxd0e 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 wx zi+t;o7ymtzvs+.475an caq; aw)o i ith 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 through a potential of 1.0 kV and then moves intobz21tm4b0hu j al *j*p :3btty3 byi6o a magnetic field of 0.040 T. What is t4bj*:3mylyb o6* pb0b t2tihtzua j 31he radius of the proton's resulting orbit?

  A proton is accelerated from rest through 5yn.7(x.u r/rp f hetl500 V. It enters a magnetic field of 0.30 T oriented perpendicul75 n(pu .rrleyhfx /t.ar 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 begm 7r;m-x*wo afore entering a velocity selector. 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 -m xga;w om7*rto be undeflected?