If the north poles of two bar mz,w/5ayp9 rir j)ru1nagnets are brought close to each other, the magnets rwz) /a iryru95jp,n 1will

  If the south pole of one bar magnet is brought neao7 43juqcv,h/k/t 1iya+yf spr the north pole of a second bar magnet, the two magne+3qk1p4 yta7, hyfvo// cjs uits will

  If a bar magnet is divided into two equk4iycf1( 0 zpy)xsx :sal pieces,

  The Earth's geographic Nort6yso-/a(ad:sw, ibo th Pole is magnetically a

  The south pole of a magp k 4m7z q k;pp5rgy:f*kuq:g,net points toward the Earth's

  An electric current produces2hs 6i vekjllhrkg7ph u)97+1

  Which of the following is corrqi,zad c7xu-ay-w8bn7 e. m4xect?

  A vertical wire carries a cuu:b *g mrd+/rsrrent straight down. To the east of this wire, the magnetic field g m/*u rb:+rsdpoints

  A horizontal wire carries a current straight toward you. From your point zn)6evrg z j//of view, the magnetic field caused by this curr 6z //jrgv)eznent

  A current carrying loop of wy6 2:f6 n73wjmn gvoo gi4yfg+ire lies flat on a table top. When viewed from above, the current moves around the loop in a countercloc mn 6ny42+f7gw36:f vgyigjookwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying cirxdn 5q.7 ,cakct j)f0vtt 2* xd0wa2tacular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What i272cajqd 0afawk *nt5,.td)xtxct0 v s the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field issfpb9 2c*vjh0(/gsolvip d ; ) the

  1 T is equivalent towb)-v1u q3dv4g0uxoj+ *v ic r

  The direction of the force on a current; yx md. +q9ruqp(pw7n-carrying wire in a magnetic field is described by wpqdu.9yxrp+m( qw;n7 hich of the following?

  The force on a current-carrying wire in a magnetic field is the strongest5hnr zg kr8gas;;*z3j when

  The force on a current-carrying wire in a magnetic field is equal to zero whh 6lh6nbtskp q1a;20jen

  A vertical wire carr)aj,uq tqwp)/: o8p yries a current straight up in a region where the magnetic field vector points due north. What is the direction of the resulting fo p: o)rwqj/8tp, )uqayrce on this current?

  A charged particle moves and experiences lmn78), d;q*ygk ro zbno magnetic force. From this we can conclude that*mqdz8 o7rnkb,l;yg)

  A charged particle moves with a constant speed throug5ugl4 w vs4k4*sd*ixj, /rtzi h 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 when the particle move tl v*kus5swxg, /ji444zdi*rs

  A charged particle moves across a constant magnetic fielv2rmo /,8e2e tuw em5md. The magnetic force on this e m ,mw8eo2vr5 /mteu2particle

  A charged particle is injected into a uniform mag;l k*4bggdz. dnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the partig.lz ;*d4gd kbcle's weight, the particle will

  A charged particle is observed trgj 42rhic99keaveling in a circular path in a uniform magnetic field. If thee9hc4i9jg2 kr particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a:/wt l svnu m,e:;2ysa uniform magnetic field. If instead the particle carried a chas/ust2nle mvwa;: ,:yrge of +2e, the radius of the circular path would have been

  At a particular instant, an electrohf 4mjq.,h9h fn moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts 4fjhhqm9f ,h.on it is

  An electron has an initial velocity to the south but is observed tt6r /, horiq4so curve upward as the result of a magnetic field. orq ,/h6 t4isrThe direction of the magnetic field is

  An electron moving alhu)x;3u nt jm q).ecl*ong the +x axis enters a region where there is a uniform magnetic field in the +ycn )* emlqhx3u;j.ut) direction. What 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 current-carrj j6hl4oy4nh) ying wire is

  At double the distance from a long currum9/-r8y usm9xd qgt w0 .zf,dent-carrying wire, the strength of the magnetic field produced by that wire def uxqr9. mt09,-ydumswz8/d gcreases to

  Two long parallel wires placed side-by-svzjzfs) tu t2a1p9 c26ide on a horizontal table carry identical size currents in opposite1zuc)tfs6 9zv 2japt2 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 the two wires

  Two long parallel wi5ug8* tmvcu nxkc5/ opha 8u*sx10e 1cres placed side-by-side on a horizontal table carry identical current straight toward yc5xc81k*p avc5nh ugeo1uux/08s *m tou. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires car 0vwcblereq0p3g ;*( 64nvfluq f9dp2ry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. Wh(*;6wef03e p0n 9pqcrlbudl4f2gv vqat is the magnitude of the new force between the two wires?

  A long straight wire camhy.3 + nv*vgurries current toward the east. A proton moves toward the east alongside and just south3hvuv.g +y *mn 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)t e.e j *8t;fez dh+z4gigxb0l ek+by8.7ghf toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpeh g)*4zb88.h e.eej+tggfxz ei ;f+byltk d 07ndicularly 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. Ivto ++f -ocj2yf the wires carry current in the same direction,f 2tjo+cv+o-y

  Two long parallel wires are placed side-by-side on a horizonpl,(457e jt5jw kqghl-khx6e tal table. If the wires carry k5lp6 hl w5xj7hj-q4(ket g,ecurrent in opposite directions,

  Consider two current-carrying circular loops. Both are made from b4mkj3 zjy0f byo,g 07one strand of wire and b7k y40,f0jgzym 3ojbboth 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 loop is

  Consider two current-carrying circular loops. Both are made from one str(6f4x w p7 5tuk3;gcsevp) b. noeue(wand of wire and both carry the same current, but one has twice the rad wnuut ;gwe k.6 p5)evef4(b73s copx(ius 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 ag vavk8md1sy,* avz* l35a 3zoccurs when the angle between the loop's magnetic moment av ky5v*zal a,*g3v a8amd1 zs3nd the magnetic field vector is

  When placed askew in a magnet28cf ):f o tasmgr737gz/ztzsic field, a current carrying loop that is free to rotate in any direction will experience a at)szo tgcmr /f3sf:z7g z827torque until its magnetic moment vector

  What fundamental fact underlies the opej yhi*g91uxrc 4g( )e y0e-eerration of essentially all electric motors?r-*9he0cr)1i(egyujy eg e 4x

  A circular wire loop lies in a horizontal plane on a table and carries currens,7 /kbxvrroe)ft: g (t in a counter7t,orgxf/ rvk( :s)be clockwise 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 partic+(m3q1q3xtj9.k; 3bw cqohh9v v1f) uvia pktle of mass m and 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 ovi 31(hq af+3u)xk1vt 9m.qv bh;3q tcj wpk9R. 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 charged particle passing through crossn/k th1)v739u su6pfrrnc x, ded electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain vv7, nrhu skur6/9fd13cnp t)xelocity 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 current , * vt 1l/nxu/vzlxrb5s*fo.dof 0.60 A is oriented parallel to a uniform magnetic field1lbu/rv v.tzdxn so5*,/fx* l of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directiob- lp ni:p:ho3n 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 )ms.f4gd t*zn* rxx)kwhen it is placed in a magnetic field of 0.020 T? Th knd*mxz x )f)4rtsg*.e 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. r3u)q a78ivj y:a egf-5bgfx:050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in orderb5 g:ir87vf-fx):y q ja3a eug for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnettve0*:ln9; hs oop kjd 9 /xs0kq/q/xz2v6eaoic field of 0.20 T. What is the magnitude0 96veza*so/et2/nx9k:pxoj/ qosqh 0vkld ; of the magnetic 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 auht ef,, 1bfff,t2pf6 ldwg- /+onzb7 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 spee5 jdrg7q6tr(ad 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 r yydp-6s5 b2lspeed $4.0 \times 10^5 \; m/s$ 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 s6+87ze h.bh4 g e3x tdhdehk7rpeed 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 speed of mj2sr, vde i94$8.0 \times 10^6 \; m/s$ 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 br s n ++5z9j+)gtwokej0 u3tz$3.0 \times 10^6 \; m/s$ 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 wivtgazj4xv-d5cj(b ;pz ,4hu. re carries a current of 25 A. What is the magnitude of the magnetic field at a distance v4jj 5; z x4thzacv(dp-gu,.bof 0.15 m from the wire?

  A high power line carrying 1000 A generaten7d ,gvb(/by es what magnetic field at the ground, 10 m agv ,/ybnb(de 7way?

  How much current must flew0(s.jse*o f ow 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 w gya)p7y1c-vaxks-m + ire carrying a current of 5.0 A is the magnitude of t)acv7-pyxs 1 g+aykm -he magnetic 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 yeer5(zbjfo z( d u(;/directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is /( er ze(5; dzbfoj(uy20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A tp*a*yim0 g5a in opposite directions. The wires are separated by 0.20ai5m*p0 *ayg t m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of bu0 fec)z1b xw ; irvhu;.-o-q20 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 the o01- ;b. vb; uhwicr) zxeuqf-two wires the same?

  Four long parallel wires each carry 2.0 A in the soba*2to kb*y,a 4.hh q)7bk jhame direction. They are parallel to the z-axis, and they pass through the corners of a square of4o,kath)ab.b2hy*b 7 ok*jhq 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 nj(djl+bzu08 of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m.(8dl0z j n+jub Find the magnetic force per unit length between the two wires.

  What is the magnetic fi x ju;4u v9;ss40axc oyxeu2i)eld at the center of a circular loop of wire of radius 4.0 cm when a0; yxv 2oxiau4s)c9uj ;xu4se current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire.+fm:f5vl1b / 6v vsqzu What magnetic field is produced at the center of the solenoid w 1/q+b6 zslvu:vfv5fmhen a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a curres2okft3. gk:o vma5w(nt of 4.0 A. What strength of magnetic fi2 wgf(sm 5o.3vt: okakeld will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generato0:fvmh h, +ate a 1.0-T magnetic field ao hf vh:t0a,m+t the center?

  How many turns shoult0 qxqx*8acc. d a 10-cm long solenoid 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 m4q-nr+xd qf4h ifb ,6f mw:;5usaxq, goment of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 c f fgrwfxxm6nhq:u,,dqa5s4+qi - b ;4m?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 011fi5kt01kw up (yme ,*iel 9*fr,hlya sqzf,.30 T. The current in tfl,1 mf*yf*, 0(ulr ,e1hwsik zqiyak9e1tp 5he 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 wire of cross-sectional area c+,n38:x mjdzm 3umgns)o va: $0.12 \; m^{2}$ 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 nvsrbdh c 6b ,cblk, 6*9 e8dy.zov8 zb6*ci-bT. The loohc dv8 -vencbsb *b k8b6,cld i6yz6bz*or., 9p 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 unif6 ed9ga; -.e.ul(nylvl- dhsv orm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when --.n(;hgl9yuelv 6vadelsd. the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.h (f0 9or gqtios.vb onalr2-)t0l,j )50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. W)hvi09rlbn)ot0,2 l. gst-(f oro aqjhat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of aii7 k n;+r;*xwcwz n7prea $0.25 \; m^{2}$ 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 ei+ac*or8 l.*cgrj)r ie4q5pd, g x-z k) 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 velocity nwiequ9i37dipm+qgq xh,9 2 h 3jukfy.p 1f 8*$6.9 \times 10^6 \; m/s$ 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 1.0d (+xyplno4 b h lx/ 9bo:0bmtery+t;0 kV and then moves into a magnetic field of 0.040 T. What is the radbm0d;xl 9xb :bp0+ (n lo+t4/hryeoytius of the proton's resulting orbit?

  A proton is accelerated from rest g 5oo sur5pp+h*knl;x;pf/ ix )i0c.athrough 500 V. It enters a magnetic field of 0.30 T orixoso x0i); +pna*kr i gl5u/;5p.cfhpented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of f 30pipfb+ zzf22)fos10 kV before enteriff)f zf0bosiz 22pp+3ng 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 to be undeflected?