If the north poles of two bar magnets are brought close to each3c,nx cqt0nsfi4x hl-3-vw -n other, the magnets wilwxnn0-4c3fs3tci ql -hv,n -xl

  If the south pole of one bar magnet is brought near the north pole oou5)j dc snq2,f a second bar magnet, thd u2)oqcnjs5,e two magnets will

  If a bar magnet is div it-7i knd))cxided into two equal pieces,

  The Earth's geographic North Poleo5x4lwath3 8: tcscf8 is magnetically a

  The south pole of a magnet points toward the Earth'v ,gct-rc6j)sgrn,*v ;(a mpcs

  An electric current prwl94u iefbm2a3 6 kd0poduces

  Which of the followi,5mrhv/ 3fas8lj5i/n4ax yqb uah33nng is correct?

  A vertical wire carries a current straight down. To the east of thi+ fjm*ptyz2s*l rx q--s wire, the magnetic fiel *lj+xt*--y2mpqz fs rd points

  A horizontal wire carries a current straight toward you.)cppkzr71aypf3x;0yjg q 64z From your point of view, the magnetic field caused by thisxy3y7kjpz ) ;gfp 14c0aq6zp r current

  A current carrying loop of wire lies flat on a9bf9qzg aj*t 7xmi9 0q table top. When viewed from above, the current moves around the loop in a counterclockwis9tmx9*j 09ba fqq i7gze sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loopl:x+ vtjj-4 jz of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. jx4v:+ jl-jtzWhat is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is id bb)qrhe,z2d8 ip9m)8 ctn8the

  1 T is equivalent toga/ (8v u2oafb

  The direction of the force on a currk. r,w1wj-k it-)rslrent-carrying wire in a magnetic field is described by wh.l-r,k1- )r i jwtswkrich of the following?

  The force on a current-carryinrwjg ;odu i22x93a* qw j-vz/kg wire in a magnetic field is the strongest when

  The force on a curren7 n/d5 c1k6r4 rzirrukt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight .i ;10cbua;cj nx rl/nup in a region where the magnetic field vector points due north. What is the directio; c;cljnu0x/.an bri1n of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From thi.0m ha:upd( his we can concladuim0 :hph.(ude that

  A charged particle moves with a constant speed through a region where a un0 ,p+l2vpw)whyrwo ;x iform magnetic field is present. If the magnetic field points st,wov )lhp;xywp+ 20r wraight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic f3a yvi i;ho9q12pl6,k(a y o j;dz/cpcield. The magnetic force onv,1z6p2 qd yj(9;/i3k oicp oalhac ;y this particle

  A charged particle is injected into a uniform magnetic l t *bbl.g;;mjws9dt4field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the parjd. t; g m4tll9ws;bb*ticle's weight, the particle will

  A charged particle is observed tra*ms0tu *w jo3mveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fasu0mjs *mw*to3t, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a 2kyz+ij so ty 1+gd11lcf07 ncuniform magnetic field. If instead th1c d++lgc7yzi0kjy 1s21fn toe particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastwardp 8b bm8*ziagj9p, 0pd at speed V in a uniform magnetic field that is directed straight downward. The magne8 j0,98piazp bbmdp*gtic force that acts on it is

  An electron has an initial velocitycx)oeqh 4..k f to the south but is observed to curve upward as the result of a magnetic field. The.fhc).xe4ko q direction of the magnetic field is

  An electron moving along the +x axis enter,ct. 8 ,1ln7njwl2sk+tbpyp i s a region where there is a uniform magnetic field in the +y direction. What t,7twji8 b y+.sp n n2cpl1kl,is 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 curre 830dqfnldxbhqu3dh*,jmq0/ nt-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the m 55-uapypsx44 +cvubh: 7 -zt7cvm nimagnetic field pru:mbv 4 5zm p-74-x7ihctas vpn+yu5coduced by that wire decreases to

  Two long parallel wir2 5mtl8 v).wxwva dl lq:n+c.xes 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. From your point of view, the magnetic field at the point exactly midway between thevcm+x)nw w q d5xtl.2:lv8l.a two wires

  Two long parallel wires placed side-by-side on a horizontal table carry identicp71.bz ddva(x-zm9zg l-p.h gal current straight toward you. From your point of view, the magnetic field at the poin9a7zz-gx mdh b dvl(.gp-.zp1t exactly between the two wires

  Two long parallel wires carry equal currents. Tj,4ih 5b v8fqyhe magnitude of the force between the wires is F. Ty5hf8v4, ij qbhe current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries e59dy8 e)k8e .q+nq0mzmyyvr current toward the east. A proton moves toward the east alongside and jus85erd ev0qk+yn98eyq my mz.)t south of the wire. What is the direction of the force on the proton?

  A wire lying in the pla ;l6o.t5lya( +;dz8gzecisbfn j3)qene of the page carries 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 the wire, alsdzlyz) 8bna (lcf;ti.sq3e ;+5 oj6e go in the plane of the page, from your right?

  Two long parallel wires are placed ;keiai1.-wplk q+- 3tzwwjg6i:prn,side-by-side on a horizontal table. If the wires carry current in the same direcwa.-tz eki:1pkl3grpq, 6+jwi-in ; wtion,

  Two long parallel wires are placed side-by-side on a horizontal tay ngz f*)n*d6fqh 4r+fuf+hr ;ble. If the wires carry current in oppositu +fq r*rhff+ g6zn4d;)hn fy*e directions,

  Consider two current-carrying circular loops. Both are made frr ) nd;*f2dyw;pvusv5 om one strand of 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 smaller loop, the magnetic field at the center of the larger vyp5d; rdnuw*s) fv;2loop is

  Consider two current-carrying circular loops. Both are made f,w erz : 9fg:fwf;xgp2k7r0c grom one strand of wire and both carry the same current, but on w7kg: 2ffw,9;r zr:gf x0gecpe 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 cuoa74m:ug .rt7+ i mpvgrrent carrying loop occurs when the angle between the loop's magnetic moment and m4o7vi.tm+ p g: rau7gthe magnetic field vector is

  When placed askew in a magnetic field, a current carrying looi t8yvi)h;: 9carrnnwu v5:5yp that is free to rotate in any direction will experience a torque untt:rrvya)8 u5cv:9; 5ywh nn iiil its magnetic moment vector

  What fundamental fact underlies nd7q9bmc3( g9vmqz+l the operation of essentially all electric motors?v qm9m7c 9(lqz3 bgnd+

  A circular wire loop lies in a horizontal plane i31 :vzrso2y mon a table and carries current in a counterclockwise oyms2vi z13:r 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 interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is acceleratedo2;8*qk of5b6 oakrhb through a potential difference 65koarbbf h2q;8k o*o 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 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 e: +dg gqkg ;afopmdfu36s(*9 charged particle passing through crossed electric and magnetic fields. The forces exerted by these fieldsd d3ka *mqusoe:9f(pgf;6gg + 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 the north. What direction should the electric field point?

  A 2.0-m wire carrying a currenta72l 3v)i-i g6 w k:qjnahtw7t of 0.60 A is oriented parallel to a uniform magnetihiq i2a vw)t63-njl:k77gtwa c field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A il2 poioiz-3 thle-x6 5n 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 ibkv;uyg 8m*a):0 z8z2 d f9fmvsh:gdrs placed in a magnetic field of 0.020 T? The wire makes zk::9; ug hag)*bffm 2m sd y80z8dvrvan angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m *tlldr bwtw8t 7a. q9)long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the)l 8wr7*ttbwtdq 9al. rod?

  A stationary proton is in a unif)w (kn0vi;fgk orm magnetic field of 0.20 T. What is the magnitude of the magv f;wng kk0(i)netic 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 speedu8z.sqv ddf,3 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 spemuxt /rha+/kd*+l bp; ed 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 v y1;- snygrjo34n a:lspeed $4.0 \times 10^5 \; m/s$ 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 ofz0kcw 1 vqp0tw5v h/a;ch+t+4 gmqko7 $8.0 \times 10^6 \; m/s$ 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 (bh r+a(sjy7aa 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 -fri4 1nr8xib $3.0 \times 10^6 \; m/s$ 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 7wl m4hi+*v *wvtxx .ais the magnitude of the magnetic field at a distance of 0.15 mm7 wx**wavhl.vxit +4 from the wire?

  A high power line carrying 1000 A generate(ibavo+.. u mgs what magnetic field at the ground, 10 m awg(i ma.vuo.+ bay?

  How much current must gem(pjou)d 98/k( (z om 6datfflow 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 curren xdehe 9)ukji.gwsk*s-w75 b5 t of 5.0 A is the magnitude of the magnet9he xie5w gjsb. ku 5dk-)*s7wic 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 in opposite directions. They ar6hf ex /l,e.w;ctnl n- s4wuo7e separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire andh4.w-e7;nwu/n 6l e,xtcosfl 60 cm from the other?

  Two long parallel wires carry curre:wc 2:t.qnpeq nts of 20 A and 5.0 A in opposite directions.etq:p.:w 2cqn 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 ma l,99ij4lxh 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two,4iax9l 9hm jl wires are the contributions from the two wires the same?

  Four long parallel wires each car+xaa)uuv 25r7b3oh 3ux iyc1v ry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the covrixuh 5v7 a+ucb 31ux3ay2 )orners 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 carvgny d(f082k;x 7lf z.ia*gkury currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the t;(kzlgai.nyk7 v8fgxf 0d 2u* wo wires.

  What is the magnetic field at the center/t48 k2m*en kphw/xg)cp2 3 1hyehm 4xknh7pn of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows ixk1 3gknt 7nhnwk4h mh*c/ 2x/82 em ypph4pe)n the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What mag wes)2:ncyzj 8 i)xytgd4nm:yd8 o /9snetic field is produced at th)tyno ne2gsdy/8 z:iy 8)xsdj4w :9c me center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0a irn p54xld48iab *ybjzvi1zzl09 0,.10 m long and carries a current of 4.0 A. What strength of magnetic fie a,l v41xi 9j08ldaiyzrbz*pz4b0i 5nld will it have at its center?

  How much current must pass buog0:fay t69,h kqs5through a 400 turn coil 4.0 cm long to generate a 1.0- kb u,gsya6t95foh 0q:T magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generate:) dy8y wvio6v a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular lo p cx7rwg64yt/n4y n5pop of 120 turns that carries 6.0 A if its dimensiynr4wp4xn5g /y 76ctpons are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetiz) 2l3xc lz9.v6j3 e juybhv0lc field of 0.30 T. The current in the loop is 2.0 A. Whjv0.9u6 l2b33hlxey)cjz lv z at is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crosht+r+ jh vkp2m *muo6 x4;s6,ltuer/ys-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 3.5 T. ,j- sk+ge5npr;fu iz8)bo2hz The loop hahe gikz);np,8s+u5 f 2rz jb-os 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 field of o dl.o6o/:fh usxi4m60.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallf4d/uolh:x .m oo6i 6sel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magg2kdnv.:a-dp c ,kdoy9/tn/ h netic field of 0.30 T. The current in the loop is 2.0 A. What i2a p/-gkd.v:hy9/ddtno, ck n s the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop znvqqogl7 3 s5x+o6x+ 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 spectrometer, a single-charged particle (charge e) has a sp7tyg2cxpsg+ (i ;- vyaxsk.t- eed 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 veloccobwq v pf u1 -lx.x7uhc9a*9/ity $6.9 \times 10^6 \; m/s$ 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 throuak5 n 5fmvb3,cgh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the5 5vbac3 k,mfn radius of the proton's resulting orbit?

  A proton is accelerated from re53ib jd 85+9ot8qxemore: xajst through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Dei oo8ed x: e5t5rb+8 3aqjmx9jtermine the radius of the path it follows.

  A beam of electrons is acce 6d h;nn 3ttkd az:t1m8b-r-filerated through a potential difference 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 of the E-field is required if bnda:hi1-r8mtf;dz 6t3-t k n the particles are to be undeflected?