If the north poles of two bar magnets are brought close to each other,72hho,2; 0 bpcbgvwzlz +e2 od the magnets willb, z2h2c2 og+b;0o d phwelzv7

  If the south pole of one bar magnet is brought near the north poleu w ifv f*c+tu bn7il8nt:9rt vo((( fx56frg: of a second bar magnet, the two magnbt(w:n5+ntr tflx g v:9 v*f i(r coff7i6uu(8ets will

  If a bar magnet is divided into two equal piecb ,qss3: wlr7ii)ntn) es,

  The Earth's geographic North Pole is ma :p4j3kslk ;ubtc(bc+gnetically a

  The south pole of a magnet pointsnkay+ieab5 uu o *c7-z19fi:m toward the Earth's

  An electric current prod()rs* ls j) vqu1oojs4uces

  Which of the following is bqqoh-7d5d v3di- twl9 ;vw o/i (xtg)correct?

  A vertical wire carrk.zy 0lwg7 0y62 9ahf(s f,pc0 kglvvlies a current straight down. To the east of this wire, the magnetic fieldv9 fal00sv .l(kp c07kzgw6 fyh 2lg,y points

  A horizontal wire carriesks,r cjk;(i 8u a current straight toward you. From your point of view, the magnetic f 8ri ;(,kcksjuield caused by this current

  A current carrying loop of wire lies flat on a table i87us4p15ttri fy;mp top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loofu4piyt r m7s81;5t pip? The magnetic field

  A current carrying circular loop o-:g)6tw1yg qtroe4qd f7dp * pf wire lies flat on a table top. When viewed from above, the current moves around the loop ing4edtfp:6t)y qw *p-q71grod a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiejy5 j0 a9nma0q:a 3tqild is the

  1 T is equivalent tocbh4qn2 ghjtw(/s 2t5

  The direction of the force on45 ulv2 rfiwmq.3lw)fj 1 yac9-fvm*u a current-carrying wire in a magnetic field is described by) ljfl5 *urwa2.c3q-muiy w f4v91vmf which of the following?

  The force on a current-carryinglc py8nh2,6xs wire in a magnetic field is the strongest when

  The force on a current-carrying wire ih3po85isnu g9 n a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region ql,vh2uu+ /zg+j eofiy:3n 4 zwhere the magnetic field vector points due north. What is tnze jyvloq 2/+,z+f gui u:h43he direction of the resulting force on this current?

  A charged particle moves and experiences no mz54 obz-vusd+r.j tm1qaod; :agnetic force. From this we can conclude thatm4+vb z ojr-1udz;t:doq.a5s

  A charged particle moves with a constant speed through a region where a -c*-is m d3gjvi3g/fm 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 movesfd -g3mvm/j* sgii- 3c

  A charged particle moves across a constant magnetic field.9g3xnl w+ vhw:p5 wgdaxqx8 r5v m;(unm3+e,t The magnetic force on this partqw;+m v3a ,w muxl (35dxv rp8wgxnn:5g9e ht+icle

  A charged particle is injected into a uniform magnetic field such sa gvq;0cdrhkfm5j6-)q p0p5a( d wt0that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, t0ra5(jq56 - a;wp ftkvpc md)0dsg0qh he particle will

  A charged particle is observed traveling in a circular path in a uniformz6;itbt cf (ikr3qp -wfu.+m: magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would +kc ;bi-qi:tzrt m. 6upw3 ff(be

  A particle carrying a charge of +e travels in a circular path ivdf08 (.ocv ovn a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the . oo8dvcvf(v0 circular path would have been

  At a particular instant, an electronoeg4 j.43g/nj z1pxfz moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic fore fz1 34jxonj/gg 4zp.ce that acts on it is

  An electron has an inb+wdzt 7 c;zmp sez-g;t,-a 0vitial velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of the ma,zwbez;-7gv p zt c-dt+ ;mas0gnetic field is

  An electron moving along the +x axis enters a enw,ercu9 kmzv0 )-)r 6;ma(5 f sddhwregion where there is a uniform magnetic fkwzad(mc0 9)msrr n)fv-w,d 5ue6he ;ield in the +y 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 produ4efjz sz,n)/6kst4vf ced by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the stre0mtp/e sn s96gy+8rkj ngth of the magnetic field producedr6my0teg9s8/j sn +kp by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry ident (hxqs)wy4 1jqical 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 vie4(w)q1sj h yqxw, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-bpgcv1zg. +41 (+ w6 ckepfeuop;cc.uzy-side on a horizontal table carry identical current straight toward you. From your point of view, the +c.1pu.;c+ uf 4 ze 1v6epc(co pwggkzmagnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of ti k6mfl f:b1)-utby4yhe force between the wires is F. The current in each w)y y6fulb if: tk4-mb1ire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward th1)tu8 j4gfw7djgn:apa, jo.he east alongside and just south of the wojda,7thg4w8fa) gnjj.u: 1pire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the botq3pv,ly2zyo:ea 82fi tom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from 2io ef83l:pvyza, q 2yyour right?

  Two long parallel wires are placed side-by-- lqvt 0jpfi5e,b0k y6side on a horizontal table. If the wires i qjyp 00lkt,v6b5fe-carry current in the same direction,

  Two long parallel wires are placed side-by-e,2vbh*;; ytuopro , 4ahs 8wvside on a horizontal table. If the wires h 8;o4hvpa;eby2rt w*, ,suov carry current in opposite directions,

  Consider two current-carrying circular loops. Bomqd wi z b6p+3hbi5k :g0k5q:hth 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 field at the center of the smaller loop, the magnetic fh h:qm3+pzkiq56kiwbg0:d5b ield at the center of the larger loop is

  Consider two current-c90mp5z qp7 gt f4 nl :j9xdqpxr/0k0zdarrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of thgzq 9 tm0nqpz7jdpfxl / d9pkx0:0 54re 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 betwe9rw+y wb3 j-o )k am,co*ti 9ooih4ri,en the loop's magnetic moment and the magnetic field vector i3 ch-k)w 4r,oia, +i9jobr9 o*timyows

  When placed askew in a magnetic field, a cy)4tee7z5 hq h3rh ;jsvk z+vq788yz current carrying loop that is free to rotate in any direction will exper j 73 eyz)qs;4hzhcryt7 h8z kve+8v5qience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of es )2sxr a9jsq8gsentially all electric motorss8q9 gx)2 jasr?

  A circular wire loop lies in a horizonta bpxt8c)njcng 3 x);+il plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, th)83ctnbjg n +xi)px;ce 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 accelerated throutiv v4a6j si0di6ei.-gh 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 uniformdi v64 6- 0j.eiiiavts 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 crossed elecw p6vil:nbt:a .,y.x4+y6mtguj y, fstric 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 fielu+, ,a sy.b6tt.f p4v :nmyl:j6gwxyids. 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 carryingdldoh*lm 4nmn* ) qv6- a current of 0.60 A is oriented parallel to a uniform magnetic field o m*lq) dmonldvn4*-6 hf
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curr k*ncc)yw*)n wo* pq+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 str o67( bm3g w:esycm/:ifv2 ogbaight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an angle ofe o3m(y6iobgsm/f : c27:vwgb $27^{\circ}$ 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 a mag(4z 4otrcux. dnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of tcr tod 44(uxz.he rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What i42be3 r.cupkym se3w.s the magnitude ofkc2u. m3yes.3pr bew 4 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 a t:b3 96a,, uykwadb otspeed 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 speetrc27f:xdzf , d 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 speep.bwy e*g qxs 8l c- +nk1mwkw+3;xis4d $4.0 \times 10^5 \; m/s$ 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 wit dkfllh6s*, 4(drw ,kdh a 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 magnetic force of the electron.

  An electron moves with a s6wz2mot*z4k4l p4q pm 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 speedio1q* 3 edwxlt m+x6fr61ek(uft e+4r 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 the magnitude) ,bh+6q uqzif of the magnetic field at a distance of 0.15 m from the wireh,6)qubq i fz+?

  A high power line carrying 1000 A generates what mag,,j m: oc-7e;opqsecmnetic field at the ground, 10 m aw cp ,j7oem: c-emoq;s,ay?

  How much current must flow for6u +n1zevgl-j,onp.vp s ui 5,iulk)1 $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight7xb )c tt/k 8ooifcd:* wire carrying a current of 5.0 A is the magnitude of the magnetic field du tkcio7tocdbf):x/ 8 *e 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 currentso : -e+5,ot p-mkz rt4pekkw;h of 10 A in opposite directions. They are 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 and 60 cm frotw5 o,4rhz--ko kepp:k te;+mm the other?

  Two long parallel wires carry currents ozw zd.( u;45s rk0 r8s8vbrkkef 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the mazudwbrv zr50rke. kss 488k( ;gnetic field midway between the two wires?

  Two long parallel wires carry zun/ *n(l wqz07oyndhqxt gtpz -1+-xjc)4t9currents of 20 A and 5.0 A in opposite directions. The wires arz dq l n)+tun4g/-qwzptnz9(tyc* 1-0o 7xjxhe 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 inzo4f4n/ q07;i11qcazsxp m hd v1. aif the same direction. They are parallel to the z-axi4id1/xfaso. 1 ;aqnh0mz47zpf1ic qv s, and they pass 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 5.03tt +d9g) u.w3cr7r3rm dkcw4ebsvt : A and 8.0 A in the opposite direction. The wires are separat.4 m d tk:+t dc3erwug7)3 v93cwbrrtsed by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at epq*)u)1 ph2e 1qhrerthe center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A21p)huehe *1e)qrq rp flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wi6xfb0l)*q,ya6y 9e rtbx el;rre. What magnetic field is produced at the center of the sobxe;fqe)r*xr6a 9 byy0 6tll,lenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Wha.fef q8l/f)b: h2ecsut strength of magnetic fieldf/sqc : 2fbh eul.f8e) will it have at its center?

  How much current must5+t/o-j3obw/ em lghn pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the centee-wl +ng3omoh/5jt b/r?

  How many turns should a 10-cm long solenoid have if it is to xyh/ a1j2dm.xgenerate 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 t-0:sgboq( jg71 xbgtmhat carries 6.0 A if its sq(x g-jg7 1omgt0:bbdimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of4v/taom9m * :m7 v, 1brnoffjn 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 aot *79vn,/mjvrn fm4mbf:1omagnetic field?

  A circular loop of wire/u- qgy wlb(m0bb pffshzo0e.,i ;4zvs n6+ .e 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 d13s2e94mc swsbb y4 ha current of 2.0 A is in a magnetic field of 3.5 T. The lo 13mb dy2 bs4hs9cs4ewop 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 r i9ahwis4cf n/; gf.shh2 .e5padius 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 magnetpigh4h i ;5.cfws/aen s.2hf9ic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.5 ec,eh0 pfnr42w1hag +0 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 parallel to tpacgf0 h 4ne2 e,w+rh1he magnetic field?

  A circular wire loop of arqjva: 1.;ln efea $0.25 \; m^{2}$ 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 particl tign5s,981ljcza7ecoi+o; oj icb( 1e (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 wij7 x)fv ,v:fetb3uxs7th velocity $6.9 \times 10^6 \; m/s$ 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 a8 /3quw gigbx9svx.d; potential of 1.0 kV and then moves into a magnetic field of ;uibqg8w 93vs .xg/xd0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic,n pckh) 7zt3)6ugbiu field of 0.30 T orien, uu7 kc ))phzbn36tgited 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 ,w*,1 rva- pyuorob v8before entering wuv po1*avby-, o8r,r 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?