If the north poles of two bar magnets are brought close to each xcir w; x3)qi5other, the magnets wiq5r )ciwx;x3 ill

  If the south pole of one bar magnet is brought near the g6efq7ixx .7 xzo78ek north pole of a second bar magnet, x .7xo787f kgiq6ezx ethe two magnets will

  If a bar magnet is divided into two equal pieces,elb)*awd,m b9gpwxy* t3m6 5 t

  The Earth's geographic North Pole tny ,okxuoi*/tnoal:h z7;q 43xq)s0is magnetically a

  The south pole of a magn k 1f )rje7: g:lwk wo*yyj5i9flkx0h.et points toward the Earth's

  An electric current producexy91(yddo:v5, hi xrjs

  Which of the following is correc+grk*em l ;n:p3q gu/et?

  A vertical wire carries a current straight dor0lrtg -we;3cwn. To the east of this wire, the magnetic field poirglt rc-3; ew0nts

  A horizontal wire carries a:m aju v:6lua8 current straight toward you. From your point of view, the magnetic f :lam:v6u j8uaield caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed from ao2gf c7h3jv d;bove, the current moves around the loop in a counterclockwise sense.hgdj3c2o ;f7v What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying ci9wwbl1 x.yc 7zrcular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterczlc w971x wby.lockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic f )q3cn7dbsou+9b:r , bben,ldield is the

  1 T is equivalent toz79q)cp(1l rkn 1owse

  The direction of the force on a current-carrying wire in a magnetic7 k6eojx7.s eo field is described by.k 7s7xje6 oeo which of the following?

  The force on a current-carrying wire in a magnetic field is the stronges8edb/ds91g7h l 3hcyyt when

  The force on a current-carryc , huwsv 93jd.kamr0j:d + hw;r*qec4ing wire in a magnetic field is equal to zero when

  A vertical wire carries aagz0u g7t4i *)iq qk *zhz(ddcv(0 )jg current straight up in a region where the magnetic field vector points due north. What is the direcci7azjk4* )g 0(zqgh( 0zqit ddv*gu)tion of the resulting force on this current?

  A charged particle moves and experiences no magnetic force6d0,zg/1+ w zxfsuqce . From this we can consqg1dfe u/ c06 zwz,+xclude that

  A charged particle moves with a constant speed through a region o20yiv4ay zo4 where a uniform magnetic field is present. If the magnetic field points straight y 02azoov 44iyupward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a c2azr*pahbl7l3ix//( 9d krh6 k x )zkkl9 jwl;onstant magnetic field. The magnetic force on this parti2 )k6bkz k j a(lwi/ rzx *lhl;x3dl9hkrp7a9/cle

  A charged particle is injected into a uniform ma fm 7d.lt-l b)2hekq(rgnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle ld7fqlhb(rm2 .e) kt-'s weight, the particle will

  A charged particle is observed traveling in a circular pathh*g;misd r-4q in a uniform magnetic field. If the particle hadr;igmh 4q*s- d been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travelhp lnzj/xj-1 p2,3kfn s in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of-23jjxn,f plhpz/ k 1n the circular path would have been

  At a particular inst+5f7dn p+ xi1brcyy w;ant, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downwar1y d icp+5by7rw;x+n fd. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwak7fi;t :c w /xlnou2)xrd as the resu t/ wx;k72luc n:fix)olt of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x a*s ;el- sn6u7xxr- e) g9yrjqsxis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, and +z gee*jqr7x;u )xys l6ss-r9- nout of the page.)

  The magnetic field produced by a long straight curre(ptzknr: b ,/tow6(jdnt-carrying wire is

  At double the distance from a long current-carrying wire, the stlr kccdv l2-enmh dk4-5ay*60f ) tst(rength of the magnetic fieldn4cf2t 0(e-5ml d th al-dr)cy*kv ks6 produced by that wire decreases to

  Two long parallel wires placed 5xv+ )sh+b*ige m fj9 cr9njz: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 wi: ezj bi5 +fgjvn*c9h 9rxms)+re 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 wirwytu/l*-h7zz q0 , uuies placed side-by-side on a horizontal table carry identical current straight toward yoyltw uh zu,u q/*i-07zu. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. Thejhg*gk)ul ,1l7*e gj;gem ji 2 magnitude of the force between the wires is F. The current in each wire is now doubled. What is* gi)k jm2jgl,1gl7g u*ee j;h the magnitude of the new force between the two wires?

  A long straight wire carr/oy05xp*gbza9k x3 j ties current toward the east. A proton moves toward the east alongside and just south of the wire.z5pjt0kg o * xy9/xa3b What is the direction of the force on the proton?

  A wire lying in the plane ofmn2l)njfqj .k 4hw ;v+ the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on anjqwlh v4)n+fn; k.mj2 electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are pla/zjx sza b./5mced side-by-side on a horizontal table. If the wirez.b/5sj xz m/as carry current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If thl e ipw z,lys;ted1d 3+:h+arh-u46af e wires carry current in opposite di3estwf1- pdaihl du a4e6:zl+r+,;h yrections,

  Consider two current-carrying circular l/lzif8,3cd j9iuk *feoops. Both are made from one strand of wire and both carry the same current, but one has twice the radiusi,8z/fjl9f di c*k3 ue 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 frol)p7t:sw 1lyglvs c;wm,8z f5hsu 0p;m one strand of wire and both carry the same current, but one has twice the g0fl zs m;,7uw 5:hp lysswv)1l;ctp8radius 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 ca8l(ple 9 p5wsarrying loop occurs when the angle between the loop's magnetic moment and5le 8 sw(lp9ap the magnetic field vector is

  When placed askew in a magnetic fiekct6jv*py)( wld, a current carrying loop that is free to rotayv 6*)wctp (kjte in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of esseb /pzw besmpx:48myjwg *:+x4ntially all electric motorsw4 j/:+wx gbb:yz8mep sm p*4x?

  A circular wire loop lies in a huhom93v -de1+*i;sa1 ft g eakorizontal 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 ts1ovaaem;1d-ke*i 3 9gu+tfh he 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 acceleratatg*f5+npsefi2 4 rj x.07dhs ed 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 n54 7 fhxj *d2+sa.pitr0f segis 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 pa; y-2cnd pna;tlyq(:v9j.c p irticle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of ty. :p-cp29c;;v (lqinjydana 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 current of 0.60 A is oriented parallel to a unif o1z+o0if zgr8.yy jq0orm magnegj.z01yq+i8o o0rf zytic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curiw4qyd sq4 t7 kj4-hq:rent of 10 A 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 ws 1e-slelel9- ire carrying 5.0 A when it is placed in a mell -seel19 s-agnetic field 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 has a mass of 0.050 kg and is in cn:b93,z3ie dmm 94ndn5am 146eywamwja d q2a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to canc4 m:a q d bnzecm29w4aj91emw n6da5id,3 3ynmel the weight of the rod?

  A stationary proton is in a uniform magnetic fi5cwch)0s .kaqqo tdq6.yb60myun68d eld of 0.20 T. What is the magnitude of the magnetic force on ydh.)cub06qdq0a.wt6csq my ok56n8 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 spee4fksuu1* mev()vgk b-cboq7 2d 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 spev(4wozvj0v1cb w j4uxohf ,+5zb;4v b 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 fjd74 5ylut*mnorth 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 s+r vl.m9+.j zzr,vrcr 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 magnetic force of the electron.

  An electron moves with acam +;a g g.l:2mxh-ql 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 is:69 bzj tmd.fxx ,bwghoj; 7on40t(of $3.0 \times 10^6 \; m/s$ 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 the5j;i6vnkzz7 w+hjol8o z x9b/ magnitude of the magnetic fie/ i8 lz5j9owkzxnj6;7+hvboz ld at a distance of 0.15 m from the wire?

  A high power line carrying bqt:xn0/krp.b/ a7zs1000 A generates what magnetic field at the ground, 1/7z s :.brk /0ptbxaqn0 m away?

  How much current must flow fayvj3- z-4wt7nuti (4n j7*wl9 pxexnor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from axncjl*huq+ c) ho c.d /u35f4f long straight wire carrying a current of 5.0 A is the magnitude of t.huccu)3 cn*q xd/ oj4h5fl+fhe 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 carr9uvq4 yldads3;b / o0vy currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of th9u3 alvvo d dq/;04bsye 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.)2h 7 mukodj g r29gm.2hsx(hj0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betw sm)hgh7u(kd. mgj922j2 rhxoeen the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposityge +n k+8t8zh5)zhpme directions. The wires are separated by 0.20 m. At 5h)h zyn+gt+ pkz88em 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 samech2:lz9c ;-t/ becw jz direction. They are parallel to the z-axis, and they pass through the corners of a square of s-cwlzetj; 9h /:bc 2zcide 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 vp9kfz n 3x/r7the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between x79k3nv/pfzrthe two wires.

  What is the magnetic field at the center of a circular lo u0u19pe/i :x4hlodbr op of wire of radius 4.0 cm whux0l14o/bru9 ipe:hden a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wirbxd11w: yq:v ke. What magnetic field is produced at the center of the solenoid when a current of 10 A q1ydkb w::v1 xflows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. u q v8l(1fyie/zrus*+ What strength of magnetic field will it have a frse8z(1 qiyuv+*/ lut its center?

  How much current must;sqdv :j+v ow: pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnew:d js:vq;+ ovtic field at the center?

  How many turns should a 1yefq cnkj*z na4vgh0,m1 c+: -0-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 moment of a rectanae fd5)q3rc4 at6; ex gh5bm1ygular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 camee55b r ht c;x1qdy634)fg am x 8.0 cm?

  A circular loop of wire of radiuso,xg l(nuw+z3 3w55 rg4sn vnv 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 magnetic torque when the plane of the loop is perpendicular to the magneti4w(3su5vx v5zl3g ngon+n r, wc field?

  A circular loop of wire of cross-s/il 2ht*okuy/ectional 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 ma v;oulc9vt.x -gnetic field of 3.5 T. The loop has an avoc xuvt ;-l9.rea 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 wico11dw 5 3mhkyre of radius 0.50 m is in a uniform magnetic field of 0.30 T. The curre kw5yo13dhm1c nt 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 in a unif)hjk s)+:skshd e84hoorm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane ok)shjsks8 )+e od h:4hf the loop is parallel to the magnetic field?

  A circular wire loop ofa, qka6 xjv-8 cvf6 )rr* hjtfcyo8/a8 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 particgcp3.l( 5nzf fag e9 /tbra+,kle (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 veid qh/ pk3o5oe gp68/ 0idqdiqmu6;8wlocity $6.9 \times 10^6 \; m/s$ 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 1.0qv1 c8m6 lci.bg ,b;mp ;vhwd ies/d4/ kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resc; ml iph8,vve/s4 b wdi;16.d/gcqbm ulting orbit?

  A proton is accelerated from rest through 500 V. It enters a ma 6l*i;6lvt d pzt6hi(rgnetic field of 0.30 T orivi lt; 6z( h6rli*dpt6ented 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 10 kV befop:zxf g+epk+h+9b))s yr 0crlre entering a vel g:ceky) h p++0lbr+pr fs)9zxocity 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?