If the north poles of two bar magnets are brought close to eachpw;upza8 fo*l0 +wa7 x other, the magnetsaoza;x 0p*fu 7p8w+w l will

  If the south pole of one bar magnet is brought near the north posnsru-+bc :9qzvwwjeh. .s,,le of a second bar ma.szqs v.+,ns9ue-cr ,w j wb:hgnet, the two magnets will

  If a bar magnet is dividedc:bw9j;rv5w z aj1y x9 into two equal pieces,

  The Earth's geographik hzndzk (m(5/q-4 nktc North Pole is magnetically a

  The south pole of a magnet points toward the Ea/; x w5u zj/6vl4erqn9qrg 7ljrth's

  An electric current prm/6z3tc r. wp04 kgobjoduces

  Which of the following is correctu x r)mml(e-)wn*s rq;?

  A vertical wire carries a cu x3j1+*pu xjafrrent straight down. To the east of this wire, the magnju3 f*xx1+ ajpetic field points

  A horizontal wire carries a current straight toward you. From your poihxgp,a.pt y xv;cgk(cu e; 6-m1ma(w:nt of view, the magnetic fhpx( :cma.-c6evkg ,mxp(ug y1a;tw; ield caused by this current

  A current carrying l phwxa :s)ck74oop of wire lies flat on a table top. When viewed from above, the current moves around the a4x7: )wschpkloop 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 viewed3d( sd kj(xnq5(. fso my6vv m2xvjw5+ from above, the current moves around the loop in a counterclockwise sense. What is the directionoydxq (2v k mxnmj(6v.wsv 5s5d+3(fj of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneti1m bwy..1b 3ymwvgxakdh56l1c field is the

  1 T is equivalent to -4jckgeahy)0

  The direction of the force on a current-carrying wire in a magngvt;2mjlq.nh gj9 c6q 1hcv +3sj :.hmetic field is described by which oqh39gmn m sjvv+2cl.6:. qch 1hj;gtjf the following?

  The force on a current-carrying wire in a magnetic field is the strong)4g7zxszomnu8 ,)v w c kkjwur9ka5. -est when

  The force on a current-carrying wire in a magnetic fieldyd (;m kk3+,9+c )vdhaqqitae is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetic**-yozsg*togs x*68dyg nyo/ field vector points due north. What is the direction of the resulting force on this curn8zx* y-*gyossy/g6 to*d og*rent?

  A charged particle mop9cg e8oil)hf:h u+e 8ves and experiences no magnetic force. From this we can conclude98:hi ch)o8 pelf+g ue that

  A charged particle moves with a constant speed through a region whehxx-darf0us 9 ll*ud34 5z(uyre a uniform magnetic field is present. If the magner3-sdd ufuhxy4 x(u05 llza9* tic 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 mz8fsmgrcayy529u45 kcz -*ro our7 6dagnetic force on this par8u9-cf cra6dr7z g* szo52muy5 y4orkticle

  A charged particle is injected into a uniform magnetic fiq9l .h/jn.ej leld such that its velocity vector is perpend/j.q9 en.lj hlicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magb o93x wq(ea4+l ink7 y7pisx+neticl iik77xa+ 9e+qn4xo(3wpbsy field. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels sz6oyki- z7:df5 k f+e0y+7bzl p5qecin a circular path in a uniform magnetic field. If instead the particle carko+z bsy5iqz:-y 6c0+7l kd efp7e5 zfried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed 3k:fktoe)2 bw7y 6fry V in a uniform magnetic field that is directed straight downward. The magnetic force)k o2r3wbyk67:e yfft that acts on it is

  An electron has an initial vha6bsv r 9j- v)37rd6*/ks5qxw gd mkhelocity to the south but is observed to curve upward as the result or*h h 6q9wgm-)xssa3/rv d5kjbvkd 67f a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region k*w l eh2qo)z9t izv;r9b7in8 where there is a uniform magnetic field in the +y direction. What is the direction of t*q oz8v9w net;z92h bl)7rkiihe 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-carryinnu5of1tpmz23o/wdb7(n + a a 7g gpk**on2daug wire is

  At double the distance from a long current-carrying wire, the strength of j)p 5hc pk*9ub xja 2hj;ls3y1the magnetic field produced by that wire decreasejykp*hslba1 3);5 hjux9 pc j2s to

  Two long parallel wires place9+1eodn3 bxw ;1 mitb1 sg+hsvd side-by-side on a horizontal table carry identical size currents in opposite directions. The wire t 1+hi 1ns ;oed1+wsxmbvb93gon 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 the point exactly midway between the two wires

  Two long parallel wijkwi1sh4sm6s b4 23jc: z0cp kres placed side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between tc4: mb3s0z4h sjp2is1w ckk6j he two wires

  Two long parallel wires carry equal currents. The magnitude of the forceeq+at;y hazjs z-jde 70r,7n7 between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betw7jaj 7zsty0r +zhen qed- ;,7aeen the two wires?

  A long straight wire carries current toward the east. A proton move) pryf9ystceom9 5)2is toward the east alongside and just south of the wire. What is the direction of the i) fr c9 yey)9tsm5po2force on the proton?

  A wire lying in the plane of the page carriesw, nrbmst7eqz )c,jvnfx9 4 /:cv8)hr+cd 7 rd a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward,c v+j9fcc /s,hbrr:zx8 de74 t q7dnm)wrv)n 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. Ixv2 xa) on(r5wf the wires ca r)x(aw vn25oxrry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table.d)dy7r i6o9g )4ws bn0*mfiwy If the wires carr fywys4 06r7b i)win o9)mddg*y current in opposite directions,

  Consider two current-carrying circular loops +rx)47jn2kbum; 4f 2 qfpi/ nqeyib6as*bla.. 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 magnets *q/)2b4ayq4frj fnki a bm b6x7+in;ul.2epic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying cirp90i tkpl) )a-poirs 9cular loops. Both are made from one strand of wire and boths)t)k9 ppailopr-90 i 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 loop is

  The maximum torque on a current carrying loop occurs when the angle betwzyv.ct3jv7z)+ t1ra7 ig w9hgeen the loop's magnetic moment and the magn.gtygcahzj79z)rv 71i +wv t3 etic field vector is

  When placed askew in a magnetic field, a current carrying loopj spk ycqym0q2he51 7:*;qdr m that is free to rotate in any direction will experience a torque u ecd2m1q 57:shyry0kqmp;j*q ntil its magnetic moment vector

  What fundamental fact underlies the operation of essentially allb47phcrx 2jzokn37z + ;wfmp 4si94xx electric motors?ic4; m4f32s 7bp hxxo krw79xpjz+z n4

  A circular wire loop lcrp 8mhghy; / 1kgc-jc mjd8-/ ye wg;-d+/xyties 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 hh- g dccx; 1+/yy-rtewj8g p/ky gm /j-;dcm8to 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 particle of mass m and charge f(b7i4eknfw3jj 4.7u x 4aqai x4:iuc 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 a 3fiui7wk44xa47bfuj:i4qce. ( njx 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 consisti:nm gdq3uu4()yrks ; s 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 mov3 ;)ugr: imuyq kn4(dse 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 tv4d3r uery09so a uniform magnetic field dr4ue9 rsv03yof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of hu xi km4d)o61$30^{\circ}$ 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 st ;p-vnjg4;1obkmc ei/ bf3l0braight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle of gp;3 ev;ko0b mcbb/ 1jn-4ifl$27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass k9(-wv sn h0d*bh 8wx1 e7nl n:sno-duof 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is neo78u bh-w vk0ndn1:ehls(nwsd* - x9neded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnef8frf8q a2bn co0z :b:tic field of 0.20 T. What is the magnitude of the magneticb acnzq:ff8:0 b2o rf8 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 speew5*rriz ,*j tfd 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 xqaz8mi y+c0kp q36q;j u*+ifa 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 due north wi.-mzu;tm2d 3mqd6bnx cf: )pl + t7yb-8ipxvyth 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 of e 6h::ufw -djhp eba()$8.0 \times 10^6 \; m/s$ 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 sz 2q,lkf*yxs:peed 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 ofsvi 7m).m1kgs p0-p/.yr duggfj2 y :j $3.0 \times 10^6 \; m/s$ 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 c 1nwtc1h-jrg0b: nvf:6yiib /wb*i p(urrent of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire y0 rv*ph1(wi:g:1c6 jbtnfibwn -/bi?

  A high power line carrying 1000 A gfs5 zj(4fkog ,enerates what magnetic field at the ground, 10 mfg4 skz,fo(j 5 away?

  How much current must flow forubo/1n0dt1j+j9t j w2 j-ifna $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long stragf ofl8z:5w 0lh09wr y +pvlc5ight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the streo 0:zrw8fh0y +llg95l v5pf wcngth of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of ee - (b /8+m5whnfxjwb,bh-qkd 30,bjxv+igp10 A in opposite directions. They are separated by 40 cm. What is the magnetib(ji g3xhn,bpb+e8 - qkv5hm/fewx0bdj-w ,+ c 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 opposite1jj i8bgj7s,qwqew 9 3 directions. The wires ar9qi g, j8wwbs7jjeq31 e separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents w2cx w;619c bba 8 wlnb,qch7oof 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 9b,8owc a6 n7c1; bclhxw2bqwcontributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They aren+xftmw 5v0jteu +-erz+7wj , parallel to the z-axis, and they passt7zmu x,n0+few 5 evtr+-wj+j 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 opposit2rb -dy 0bm(r/)n kg.mge7fwce direction. The wires are separated by 0.30 m. Find tg(rf)- rnemd ck./7 0m2yb wbghe magnetic force per unit length between the two wires.

  What is the magnetic field at the cent/c3 xy11ohiwr lo) .w(jp 6bey-3 xqtqer of a circular loop of wire of radius 4.0 cm wh wl w/(oyiqejp-3. chry163tq bo1xx )en a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What manq8g (doy*7i3qe9 lab6mmm wk*xh3 5cgnetic field is produced at the center ch* m7x 8d5q kiymg*e6mb3n9wal(qo3 of the solenoid when a current of 10 A flows?

  A solenoid with 500 turnsjo5d c 5kd5zt- is 0.10 m long and carries a current of 4.0 A. What strengthjo 5d z5dc-5kt of magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate +h7jeml cy8n-g* iim; a 1.0-T magnetic fyegm-*lch+m78 inj i ;ield at the center?

  How many turns should a 10-cm long so eve ;f0*st;jy myd1/rlenoid 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 that carriesjnzmvvav34 5 - odb* 1mz4f.fa 6.0 A if its dimenfzvz34jo*5vaaf nbm- .m v4d1sions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field 3w wl5q uolr 70vs ds00atdfxwi 3zm3*p:c e*5of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendi:l0q*5swp vwt5lc 0xof0ue idsz 3rdma* w733cular to the magnetic field?

  A circular loop of wire o29vq fxv9ic z+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 2r bh4f pfy6tg38v+u-w.0 A is in a magnetic field of 3.5 T. The loop has an are r63f84wp-v+fgbhu tya 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 iyqmx7yuy8 32 b: 0byzmagnetic field of 0.30 T. Tyqiyy0 :yu3xb b8z7m2he 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 loop of wire of radius 0.50 m is *r3 xfbqx j(6siis4l7in a uniform magnetic field of 0.30 T. The current in the loop is 2qfr( ls3 *jb 7i6xisx4.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of areaw3v7i8p7ixbk $0.25 \; m^{2}$ 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-ch+u psql- x/unoin-p 81arged 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 velociyd v1 )hi3f2umkci(y9 ty $6.9 \times 10^6 \; m/s$ 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 6;q lgxd2jiqc 4ct8p+a potential of 1.0 kV and then moves into a magnetic field of qgjdc 2pt q68+4xli ;c0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. Ij 2 p31yjesiq(t enters a magnetic field of 0.30 T oriented perpendicular to i (i23eqsy j1pjts direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potentiyy7 oy+rn6c8b al difference of 10 kV before entering a velocity selector. I7 cyyn6o+8rybf 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?