If the north poles of two bar magnets are brought clbk .;n63lohw pose to each other, the magnets willbhok3p 6.n ;wl

  If the south pole of one bar magnet is brought near the north polx kohpy+i )-5u qa9y*we of a second b-5 *yqwpakx )hoi 9yu+ar magnet, the two magnets will

  If a bar magnet is divided into twovm-1 e/(mz nio equal pieces,

  The Earth's geographic North Pole is magneticasu28v jc3mjy5 lly a

  The south pole of a magnet points toward the Earth's4-a- qp7vw 1chgf6da(inav9h

  An electric current proisn, 8*-yfo ds 5vcsz,duces

  Which of the following is corrlspt.*ju+kh6x9 bxl.5zbg zy . j.v6 pect?

  A vertical wire carries a current straight down. To7,bcmcsl /+d: an exsttlt )f3c,pt)8 the east of this wire, the magneti)lc8t l sex7+t cpb,3)td,can:fts /m c field points

  A horizontal wire carries a current straight toward you. From yourucf2*thq97 7 /jve mtq point of view, the magnetic field caused by jvmtt*eh2cfqu97q/ 7 this current

  A current carrying loop of wire lies flat on a taw;v2z nu7 h4s y+c s(8svakt(nble top. When viewed from above, the curcsay+ ;4(2w vu7shk (vs tnz8nrent 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. When vio iegyy :8g85fewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, 58fi:8eog ygyinside the loop? The magnetic field

  The SI unit of magnetic fi ovpyndjbo;r(kk3m c(:(8* : xd)p exveld is the

  1 T is equivalent toem)kyqw9u3 3fq f46+agw wgg d9hs 6/f

  The direction of the force on a current-carrying wire in a magnetic field is dmkn0-ctz:u 3l escribed zulkn3c0mt- :by which of the following?

  The force on a current-carrying wire in a magnetic field i1a3ewbr :c a)ds the strongest when

  The force on a current-carrying wire in a 9ht7. yd rk6od)qm3yomagnetic field is equal to zero when

  A vertical wire carries a current straigb , hpyrayt j7w:5i0)/djh,eght up in a region where the magnetic field vector points due north. What , b,5h)yyj jed:p7wt hgia0/ris the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we caq*ab :w9i( g/plrbkpkf z27 r.n conclude rpwaplibr:k2qf 7* zb(.g9 /kthat

  A charged particle moves with a constantlbay,3la siy05dpe;d+ sj ;utbp3 .2s speed through a region where a uniform magneb;lpast l;s+2d .3ib upy0y3a,dje5stic field is 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 magnetic field. The m b:a:f7n *rtv;;n;(,z,ic,egnw um3 itewqy kagnetic force on thnrtn:*n b,w,e;zf(t 7quiyi3vwk e: m a,;cg;is particle

  A charged particle is injected into a uniform magnetic field such2k 12w.dtwxk b that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the1bw2.wkt kdx2 particle will

  A charged particle is observed travelqt- 3z7vsivk1b,p :u 93iqxzzing in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wouldbtiz 3xv,1-kqsupq 93zzv 7 i: be

  A particle carrying a charge of +e travels il 0b++qeng5c in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would q nbie+gcl+50have been

  At a particular instant, an electron moves eastw5i 1(si) jgjvvlqo 0ki hh67y7ard at speed V in a uniform magnetic field thais 1hjli5qhiv( 06y v7o7gjk)t is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the .fm1 b7 p)xyuknbp:u 3south but is observed to curve upward as the result of a magnetic field. The direct) y uk1.fnupb7 3b:pxmion of the magnetic field is

  An electron moving along the +x axis enters a region where+ig ;ix,yx(,s3k uku u there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (i(i k+g 3,kysu;xuux, +x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight cur 0 lw/uzt9d0+umrgwe 0ssq+2 yrent-carrying wire is

  At double the distance from a long current-carrying wire, the strength o.i ,7;lnr:ac6b vzi hpf the magnetic fiezviina rcbh7; .6p,l: ld produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizon wnfid30g/s1p(ivk z7tal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left car d 0ig1ni kw(7fpv/zs3ries 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 table carry 1k3sso6cl qi:7lal3 iidentical current straight toward you. From1sqoi ask73lcll 63: i your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires )cwpa 3s 5/2i4a5t rgr-utl dxcarry equal currents. The magnitude of the force between the wires is F. Tl4)taurp-rst c/3w a g 5xi2d5he current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carriesmwe-d7 (lq-ar current toward the east. A proton moves toward the east alongside and just south of the wir(-ql mw7daer- e. What is the direction of the force on the proton?

  A wire lying in the p8 y0z8+ )b2zvkim mxxglane of the page carries a current toward the bottom of the page. What is t0m bxkx 2zmiv +yzg)88he 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 horizontal table. I n(mv. dw 7y/1fldffz+f the wires carry curr.m7(1d ydzffw n /+vlfent in the same direction,

  Two long parallel wires are placed x hv6)be +j 4xy4*tufhside-by-side on a horizontal table. If the wires carry current in opposi6f j4v )* xehuy+thxb4te directions,

  Consider two current-carrying circular loops. Both are made from one strand of ie3 +schin)/h6xexf: wire and both carry the same current, but one has twice t6+/xx ce)nfhieih s3: he 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. Bocwiqjk h3( .1za,y9dlth 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 smaller loop, i,9hzy (.adj1lq ckw3 the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle between the 7/q,tnuhn / srloop's magnetic moment and the magnetic field n7,uh/r nq ts/vector is

  When placed askew in a magnetic7sj ul6 1bnii/*p+zl p field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetsnjzl+1 /u l*bpi7pi6ic moment vector

  What fundamental fact unde0ppu nw.1 p.bllqp,1d rlies the operation of essentially all electric motors.pl,nq p pb0l w.dp11u?

  A circular wire loop 3kwp o((r dhc9lies 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 torque caused by the currents interactih p(3d9ck(owr on with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is acceleraxig.e0ub u/87(4gt pfsgq d8e ted through a potential difference V and allowed to enter a fsbgi exeguq/(470ugp8t8. dmagnetic 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, and R.

  A velocity selector consists7gafq 24 /r*v0woffzs 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 movsw ffof70 /2r4a* qgzve 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 orug jp6 *9ucpyi;70qwwiented parallel to a uniform magn09 wpi* u6pg uwjcq;7yetic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directirb8* roq mxsy6,3 -diwon 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 upbu:))ql3pau;gz.k5tbf 2v4vi+ naplaced in a magnetic fie fipunqb;vkuv 43p gt a2:)bula.5z+)ld 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 hayhms+bp 63b7 gs a mass of 0.050 kg and is in a magnetic field of bgb6+7h ysp 3m0.10 T. What minimum current 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 0.20 T. What is the mix*:duk) jujnlavts0) f r( r1;yyw 4,agnitude of the magnetic force on( dj t )y0kul*raxs:rijf4yuv );w,1n 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 wipe7 p.j16t04 tdn6u9 agr jendth 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 a spe mk4 9a:fmwz/+k wkf47)u avaded 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 9pklxrnb*l0e0/( blr 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 speedb2 gfbm:l -7cn o(wa,s 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 spw 8+k .attu3ur4nl(gieed 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 xakvse4 xinn/(z7: 3 w$3.0 \times 10^6 \; m/s$ 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 magnitude of rax:5n pg*q,t.pati3st,4 dc ++cmmk the magnetic field at a distance of 0.15 m from ths d,*p.qg5ct c3 4+r,ntpmtm:iak+x ae wire?

  A high power line carr8:amqm0ni.qq,r)f z pying 1000 A generates what magnetic field at the ground, 1i: .q)q nr,8m0paqmfz0 m away?

  How much current must flow f kz(ycz )md 1(-h kn(:qoyke3kor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 An ai2o9 mw8,cch yhw3) is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's cmcnh)2 aw8iy,3w 9ohmagnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directf4 yfj d(loxx / z7cdl)uo23*yions. They are separated by 40 cm. Wh3 fy)od(ylduo cx jfx2z4l7/*at 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 direh jh: +e;klwp*ctions. The wires are separated by 0.20 m. What is the magnetic k*ep :hh;lj+wfield midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direcev k:edgesn+ u5tp 7s:wk(.frr/ 1jw,tions. The wires are separated by 0.20 m. At what point between the two wires are the contributions frsdr.tr(n:s ue k1pf+ 5j7/,kgw: eevwom the two wires the same?

  Four long parallel wires each carry 2.0 A ifonb(- f) ld*kn the same direction. They 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 field does one of the wires experifbofk ()ln*d -ence due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the-u9bu8 rud q0fa)+xcr:ov3w 1 h fwa m8o9v6ii opposite direction. The wires are separated by 0.30 9x u0u 9ihaqo +civ)mofvua w 813r8bwrf:d6-m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of radgvcip4d mk.tjwm v:- :y):q/bius 4.0 cm when a current of 2.0 A flowv)::/tjbmk:4w dv-.g i qcmyps in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire.9u +4kxut zl/egad.j* What magnetic field is produced at the center of the solenoid whezj9+ag4xt le.u /*kudn a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m lon g1lg7l-z 9j1ke1fav gg and carries a current of 4.0 A. What strength of magnetic field will it have at1ke 1fgz9 l-g1gj va7l its center?

  How much current must pass through rfv(m- byq( j9a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the c -yqbfv m(j(9renter?

  How many turns should a 10-cm long solenoid have if it is to gener 8 r1kd*d)wakxprvkf: ;:v.yqate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment(7+g i fe5 .ycsb*fi2artl gc1 of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cigriaff* + 5tc 7(l21e.sy gbcm?

  A circular loop of wire of radius 0.50 m is in a uniform7 /msxp4. 2pauylf,lq magnetic field of 0.30 T. The current in t.ps,m/2ly l 7fu4qa pxhe loop 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 wihvu4;ag;)fw b/ hk k.are of 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 b66jhgf, d1(tysx,y rmagnetic field of 3.5 T. The loop has an area of6gr(d yxy bhjs,t1,f6 $0.12 \; m^{2}$ 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 oh(/ oa*5)8an2npp -rs4ybic 4 ,w.qmugxq jbtf radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop j28q / w .xisq5h()tuban* opacrb-44pyg,n m is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radi1m,g2pn8auhx,to o:t us 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 magnetixnh2g8 t: , ptua,1oomc torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop o.(c jp.s(vzywi6raac -mw,h) f 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 spectrometer, a single-charged particle (charge e) has a speed oklfwxw2b 38( u+k. ,zv*giy crf $1.0 \times 10^6 \; m/s$ 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 velocity,sgb ,+ :xipwks*fw+x $6.9 \times 10^6 \; m/s$ 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 poteehqau:*8 7ute ntial of 1.0 kV and then moves into a magnetic field of 0.040 T.7*hu8 :teque a What is the radius of the proton's resulting orbit?

  A proton is accelerated fr1q ms da-(u/7sqenqc7om rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction ofs ceq(-qsm d7ua/ nq17 motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential diffb(4:; l (qqh.q ihfdyperence of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value ofqi h(f 4;pyhq l:dq(.b the E-field is required if the particles are to be undeflected?