If the north poles of two bar magnets are brouxdirm65) 0 rxas ;jt0l3p,f dbght close to each other, the magnex5ab0m ;tx rdpfs)rj,ld i03 6ts will

  If the south pole of one bar magnet is brought near 5vzpw t //iq+swr2+ltthe north pole of a second bar magnet, the two magnetsr5wqzps/it + l/v +wt2 will

  If a bar magnet is divided into two equal piecesjqcxn.b; g9 i5,

  The Earth's geographic North Pole iqmcda7.k- xl :s magnetically a

  The south pole of a magnet poin,;ih6o m mvda28d)ygets toward the Earth's

  An electric current pr:q0h4 vgw- ,9qcgro n f /1tdqtl)qk1yoduces

  Which of the following is corr6d r az2sut,5eect?

  A vertical wire carries a cu (0ano+k 6xsgarrent straight down. To the east of this wire, the magnknxo0a(+ag6 s etic field points

  A horizontal wire carries a current str.5uns r *v ,ybezmm+b-aight toward you. From your point of view, the magnetic field caused by t. m*m+ b-nusez,rvb5yhis current

  A current carrying loop of wire lies fl d+i8y;mm vya-) ar5azat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magne 5 my-aiaaz )yr8m+v;dtic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire v.u9*kay/vx u lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. .vu /y9xka*uvWhat is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fnl8 b0r 6bu4imield is the

  1 T is equivalent to3cubzhu2bx 7n0 w d;o .n*t9ii svs;x/

  The direction of the force on a current-carrying wire in a magnetic field ism-5ydr :w v4tno/l7 9q5rjvze described by which of the followinzr7vq4wyt n voej9 rmdl: 5/5-g?

  The force on a current-carrying wire in a magnetic field3azjx u u81*cq is the strongest when

  The force on a currentth zk8w:pdlz/fv 21 p9-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straighttaq6w-0rewln0 ahj; ,*x0ta c up in a region where the magnetic field vector points due north. What is the q rx,ehtaj6;0c 0ntaw*w0-al direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can pp(x5;uoi m dcmclf3d. *0m0iconclude t(mcp *0dip;0 fuxolc.dm5 3imhat

  A charged particle moves with a constant speed through a region where a uniform gqqy4d2 tk g fia9i1-0l2v i*amagnetic field is present. If the magnetic fig-lta vgi d091q*i2y2 kfqa4ield 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 magnetic forcexv/x8eugy 3)o oegu3 / ovxy8)xn this particle

  A charged particle is injected into a uniform magnetic fieh vmr 01j3,t;g fjuvl*ld such that its velocity v,v j m03 t*uh1glfj;vrector is perpendicular 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 un0+lqda+v2y gq*w 3v geiform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wouldqqg eyv+a*d3 vlwg0 +2 be

  A particle carrying a chargeu6 ndudzs5ik 7i6i(9r of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius n6i usr65i9( ddz u7kiof the circular path would have been

  At a particular instant, an e3umczsyewhr8,u,:9l 2dyvt9 lectron moves eastward at speed V in a uniform magnetic field that is directed straie,9 yh dl83w myt:r2 u,vzcu9sght downward. The magnetic force that acts on it is

  An electron has an initial velocity to the sout5 ijnmh(t9 9bbz. ba:nh but is observed to curve upward as the result of a magnetic field. Thea hnntz 9 i95j.bbm:(b direction of the magnetic field is

  An electron moving along the +x axis entersw,x dtrl v; gqa2efts2zb v7 08,6b;to a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on t;tb2lfq8 et7ao w2 vzxv0 g6d;r tbs,,he electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrygrn:dlh 3i.-9t*7cikr) n loh ing wire is

  At double the distance from a long current-carrying wire, the strengt p u0m6vmbb6tv 5x0fh4h of the magnetic field produced by that wirv6 0 hbmb6tx0fvmp54ue decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry id-t8 15rpmwsuaifo-8s . b*l gqentical 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. From your point of view, the magnetic field at thfqgaou8*8l-i rt. mb-s s51wp e point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carryi 0mj wmyv0i *l(ih6l* identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two*vll06jm 0imi wyih( * wires

  Two long parallel wires carry equal8e:sfywg3oytwfr 8 x. s24z r5 currents. The magnitude of the force between the wires is F. The currs 5t8x4wyywfzerg.f8r :s 3o2ent in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward tgp lk;m z.f2to,uac;u *tr/f,he east. A proton moves toward the east alongside and just south of the wire. What is the d ptozfa2gcut.,r k lf,*/;um;irection of the force on the proton?

  A wire lying in the plane of thgkpk +z-q02r lk, y+kre page carries a current toward the bottom of the page. What is the directqk,-k rlzk + py2rg0k+ion 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 aryl,9c/f6 :zv xx.zhpue placed side-by-side on a horizontal table. If the wires carry current in the same:,f x9 xyp zcv/.uhz6l direction,

  Two long parallel wires are placed side- rfb: q:nf0(jtzc oj9 )t7ui/hby-side on a horizontal table. If the wires carry current in opposite direc 0)9i:juofc7zn (bqrf:t /thjtions,

  Consider two current-carrying circular loops. Both are made from one strand ol1 g)fdlqv- 3pf wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic field at the center of the smallef31l l)gpv-q dr loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Bot7ahbnp7 kziuc)/ i0k2h 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, the magnetic moment of the larger iu2 h/n) zpc7ka7ki0 bloop is

  The maximum torque on a current carryini*) es52kiovr:ikk4(alpa /vd 0 2jmi g loop occurs when the angle between the loop's m *iv5 :akkasmlr24pv)/i 2o jd(kei0iagnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop ;/ad0mzoi l7l e 35x5go phmy,that is free to rotate hy z,mg5mo 3laxoe d;il5p07/ in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electrq)xhihu d3u(;ip;qm bp .o g(j 7q5cx3ic motors?qcqp xi)753.mg3h ;u i ;xu(ojb(hqpd

  A circular wire loop lies in a horizontal plane on a table and carrk8yucd h2kqie :+;3n ufgal9p+ id4/ yem*xs)ies current in a counterclockwise direction when viewed from above. At this point, the Earth'skm:y dx+ues l4g8cdf 2 y u)hn9i;e+q3kip* a/ 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 interaction with the magnetic field?

  In a mass spectrometer a particle of mass m anms 6j4gw 1xy 2lt:/zynd 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 andlj 6mg 4nt:zyws /21yx 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 tb j(ahg- 47ilyq oy30hhrough 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 the east, and the magnetic field is directed to tho0j37y(l q4igah hby- e north. What direction should the electric field point?

  A 2.0-m wire carrying aktk:t2 v5su t.c( f kc96bgmw1 current of 0.60 A is oriented parallel to a uniform magnetic field ofk1(tmw295uc kbf6st.gct v:k
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 As lmqgw v;x5kl7:8qc ( 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 meter on a straight wire carrying 5.0 A when it is placed4uu; :b(g*erxie6 ernhgf57:)d rps i 4v niq) in a magnetic field rirg(7feud qe :i4h ibe 6)4 5;nnv*:gxups )rof 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 0.050 kg and iss .ka:atjws v00fwjn)451bd n in a magnetic field ofns0daswva j0ft b1nw :. 54)jk 0.10 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 uniformttn+0nwrv b42 magnetic field of 0.20 T. What is the magnitude of the magnetic f n42+vrb n0twtorce 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 speevwx kc. /ymz++6z8 dflga7a .jd 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 spem*vf02fg s0v0mvtez5v :9lwped 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 non5cmyo up. whi6.sk .)rth 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 sb*g5s-rvqfpep:-d) :l twag 7peed 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 az*gd0oxj-h 7/e3 3 xvgfgt-n j 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 of;aiqx6d.b0w syo2 ;jgyt+/x v43alik $3.0 \times 10^6 \; m/s$ 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 magnituu 31k 8n:ktpf7ai1uk cde of the magna1:cku1k fi3 78 tpuknetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A geneqkjdcg3e6z 5su3x d)ls; h-,frates what magnetic field at the ground, 10 m- dx3)lhqs ku,;zsjefd36g 5c away?

  How much current must flv0 8krq3i (yi44befl aow 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 of 5.0 A is the ma :-fuw-vw/j1zo u :vxhx.qo ,lgnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic fiev,/f.l-vz:uouj x w-h x1qow:ld of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of q b y0mk gr(tr;p)u*sz ;7vs*u10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a um p*; s vrks)* ug0;qr7(bzytpoint that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wirc,t5pe/k p f9bh3ub j5es carry currents of 20 A and 5.0 A in opposite directions. The 3/5t, kbhj9 upbcepf5 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 4ts 5l4n -;kj neaqpa4and 5.0 A in opposite directions. Th4at4; 5-sq4enlna k jpe wires are separated by 0.20 m. At what point 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. Thi1cr0pjfat3r+ +c3 hhvr fa 38qlg 27znz48hpey are parallel to the z-axis, and they pa3p1+zn0 7qhc2h a +z8 g jchrirf3tfv38prl4ass 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 opposite dijn1r f(1g1 duorection. The wiuj n(go1drf 11res are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic bl;,dkno ) rce666r/-0hn1dfu rxptrfield at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in thek1);rdt /ch,0 6nrxlr6b6 oued-pnf r wire?

  A solenoid 20 cm long is wound 1lxa-7m:t1(nzgm taewith 5000 turns of wire. What magnetic field is produced at the center of thztxn11l7 a(-gat :m eme solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.74tr0bdrtkv-i9kg2a,ydslebsb17 30 A. What strength ok 0g 7r2e1-7,tasr9l 4yvsb3dkt bbidf magnetic field will it have at its center?

  How much current must pass through a 400 tub+u +5v3s8.a2w uxf,hl4l0vfl uwp, vz2 sm zbrn coil 4.0 cm long to generate a 1.0-T f m843 s2 abzz0 w,lx,vluu p2u5+wbhvfs+v.lmagnetic field at the center?

  How many turns should a 10-cm long solenoi sqtnlf: )0hy9d 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 cws7 : 7kjdufq) .x4rdrarries 6.0 A if its dimensions are 4.s7wu:frdxqj d 4.k7)r 0 cm x 8.0 cm?

  A circular loop of wire of radius 0 ac-vy0o. yf0p.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whaca-o f y.0y0pvt is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire8tcs*p,(ocm- +sau qy1yt in /1 gynd3 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 magnetic field of 3kwumo l- -tq )25vlor1.5 T. Thet2lro5ku w1 ov-)qm-l loop 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 w(b)byz4u q9 * i0ov;bh)cokuu+t fq+mire 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 0f4y ) (i9)mobzbuvkcth+* uu;boq+ q is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire n sw84(we6 cb8frng/y;t uwb:c3iy5y t5d9nnof 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 wn wnn5/ b iyuycntbfd9y;(c 8we3sg654rt8: magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopj9 gw.ab 9kq:.bgw5lg of 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 spectromethd236l tk5pclvu o;o/er, 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 vrg-q5- eknb f+elocity $6.9 \times 10^6 \; m/s$ 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 elbuvs.37i )t*h m7ig1.0 kV and then moves into a magnetic field of 0.040 T. What is misi.7tg7 bh*v ue l3)the radius of the proton's resulting orbit?

  A proton is accelerated from rest throw.ur:fmeg ng8l(gp i5u/s-s2 ugh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its di-5eg fin:g ps8um2 r(u/s.l wgrection of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV be.syi elwox o)56 *zi/pfore entering a velocity selector. If thezx i*6soi/lyo. ew )5p 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?