If the north poles of tw hj/y-6rswpb4 rhkl 67o bar magnets are brought close to each other, the magne/ srb 4pk7lhr6-hwy6 jts will

  If the south pole of one bar magnet is brought near the nortj tr1((ui* htfh pole of a second bar magnet, the(ti*1jur ( fht two magnets will

  If a bar magnet is divided into tt c)rsp(ca.0 weo v7joi,5 t0owo equal pieces,

  The Earth's geographic North Pole is magnetg y-1a,7d;endg x7mm twk.4ykically a

  The south pole of a magnet points toward theq f56z v,xhvbl3ap:g; Earth's

  An electric current p.xrs)/g;1p7i wbn mtbroduces

  Which of the following isnrk-d9q;)e lluyd ;r37 xnhx; correct?

  A vertical wire carries a current straight do(4::oihc 1wr0kw p jeiwn. To the east of this wire, the magnetic fiel(k1 w i0:jpihweo rc:4d points

  A horizontal wire carries a current straight towb8p:kpkea / t.ard you. From your point of view, thaeb8p./:k kpte magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When viewed frorppw2jacrnc+o tt4 1uju. 99xs.v(8gm 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 loop? The mag(t4rnc ux. 9 v+9sj1t.pow8c ju2grapnetic field

  A current carrying circular loqmu/e b4-e hnn gr6 j2us2.aec,in+ k*op of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic fima-,ng+e4/hbe. 2 iqj6 *rknes ncu2ueld caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field)p 5(dz t,xleaa aus -mgt8+*a is the

  1 T is equivalent top))q8hmt swrr8/iyq1p pa 34 w

  The direction of the force on a current-carrying winr0 )ym o9*fdere in a magnetic field is described by which of the followimod0 *n9r fy)eng?

  The force on a current-carrying wire in a magnetictcs2gsvzz4:7i .wy 7 x field is the strongest when

  The force on a current-carra,k 02)wt3op3 u )*uy+sib0mvdsv yvgying wire in a magnetic field is equal to zero when

  A vertical wire carries a current stra80p/, hlu csreight up in a region where the magnetic field vector points due north. What is the direction orp /hu8e,c0 slf the resulting force on this current?

  A charged particle moves and experiences no magnetic fov/hp6rjf rx. 73vit8 uvi z2-srce. From this we can conclui73 fz8tvr rx jp i6/hs2vu.v-de that

  A charged particle moves with a constd4pswa4e *xh1ant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic ae1hw4p d4sx* force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnecz1yt*1 rjg f5tic field. The magnetic force on this parti1ctz5f gy* 1rjcle

  A charged particle is injected into a uniform magnetic field such that its veloc ht,p8 o*q6o:1kgulyc ity vector is perpendicular to the mauo*op8 q ytlk1g: c6h,gnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circupo -b5if hgr*h0n* r.wlar path in a uniform magnetic field. If the p.h n-w irr* go*h50bfparticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels e6ebjxjc8scedg -* k 41jj* h.in a circular path in a uniform magnetic fiele g*6.kj 4exjbcs 8jecd*j- h1d. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves l-:kb,m hy o5 g0+thzyeastward at speed V in a uniform magnetic field that is directed straight downward. The ma+b-hyy, z t5klm: 0gohgnetic force that acts on it is

  An electron has an initial velocity to the south but is obselo5yg9ndo nv / nb9j+5rved to curve upward as dn n9+/no5gb o9yj5lvthe result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a w wjwoy3ix(5baj+ 2 9yuniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, a9wwij3 +bwo 52yx a(jynd +z out of the page.)

  The magnetic field produced by a long straight current-carrying wire :bg5wkr9 jm 8bq.e/m 3tkhem;is

  At double the distance from a long mw iaro1 7hn**current-carrying wire, the strength of the magnetic field prodho*w a7im*1nr uced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tabr7 ybjf) s4/kmb42k tjle carry identical size currents in opposite directions. The wire on your right carries current to kr/42s fjbj kbm4ty)7ward 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 wires placmmnzm;jt n) wx t8:;3ted side-by-side on a horizontal table carry identical current straight towa3n x:mj ) tn8;wmt;tzmrd you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currentjzjirzr)gr ;0 - q9ib:s. The magnitude of the force between the wi9qi ;)g:rzbijr0rj- zres is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towar0xybk9kbm+ ,habh+ 2yd the east. A proton moves toward the easa+kb y ,hmbhk+x0by2 9t alongside and just south 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 toward t 5nfii.asi-t /he bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendiculan /t-fi.5s iiarly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a hubct c b,-:hc)orizontal table. If the wires carry current in u -c :hbb,ctc)the same direction,

  Two long parallel wires are place0x,ugq2bwyf u(f 5vf8 d side-by-side on a horizontal table. If the wires carry current in opposite directioufb20,x5fy( u8 gqfwvns,

  Consider two current-carrying circular loops. Bot5tco srx3z*0 th 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 field at the rszto 0x c35*tcenter of the larger loop is

  Consider two current-carrying circupa.3r nih9r. tb3nw0hlar loops. Both are made from one strand of wire and both carryh an.rb3 irt09pn.wh3 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 loop is

  The maximum torque on a currentc3r x-8vw 9nu2wolro5 carrying loop occurs when the angle between the loop's magnetic mn r9 v-l35ocu8rxww2ooment and the magnetic field vector is

  When placed askew in a magnetic field, a curre b+qeij chy+7/nt carrying loop that is free to rotate in any direction will experience a torque until its magnetic momentq+iy/ e+hbc 7j vector

  What fundamental fact underny9uq-hi qiu66n lao/r00ef 7lies the operation of essentially all electric motors?qo67qe96nu i/ nayhu-00ri fl

  A circular wire loop lies in a horizontal plane on a table and carries current yvssq c9ke.q6ngh ;(7fbv93m in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips below thqmg( nvvyc f. 9esq76 sb3k;9he 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 spectrometerpw;vfc6sdeq nz w* (heq 66(w; a particle 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 R. The magnetic field is uniform and oriented perpendicular to the vnf dqez6*( ;pw6ev 6s (;hqwcwelocity 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 parckz 7:x 8u s9dv5mwq.ssing through crossed electric and magnetic fields. Tux qw9vksm 87rd5:.zche 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 the north. What direction should the electric field point?

  A 2.0-m wire carrying a currenhj0v4bl nlz 62t of 0.60 A is oriented parallel to a uniform magnetic fieldhlb z0j6vl42n of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current c;h:/z7jf t )n,v+hfv:.q2cq keem mmof 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 wire carrying 5.0 A when it is placed8q k tkx;y)1iq in a magnetic field o;qk tq)iy1x k8f 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 mailb9;*uqmp td h wi 2ms+fq+,80u igc2ss 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 cance,* b i+ +2;u qdc0pgf9u mw8i2lqhimstl the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. 9x5c3rojf s,2bn+qww What is the magnitude of the magnetic force oxrf5 qcb9ow ,2s+wn3 jn 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 wiqa0jd,y)amn 3qh d qi:vceul- x8m uo1r;+y02th a 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 speed 7k hx ,qf(e pbq:mt2t1of $5.0 \times 10^7 \; m/s$ 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 travelingjvkyaixbhld; -+ 4 .;k1)kg ey due north 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 wi9sp86 ee l6hcvth 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 speedwsl g1pn/6:qdn oi on/++dd;pjsb d11 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 of83h+tdw.zy skr oj3q* $3.0 \times 10^6 \; m/s$ 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. ) r g(by/sb/qcp //1 cy,vnrkzWhat is the magnitude of the magnetic field at a distance of 0.15 m from vc nckgrzbsyq/by1( r / /p),/the wire?

  A high power line carryinl /a;a1st-tlyoxhx 6)22zpxfso ;: uc g 1000 A generates what magnetic field at the ground, 10 m a/f t2 ;x2luxl 6taa yoxhopcs)zs;1- :way?

  How much current must .lwrl2f*9v09nuhrpl .z3 fka flow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from tl ;4t87 x bf:tjyogo 5+/qpjza long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of txtpo4qzg+ 5 b/tj7f8:; jo ltyhe Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires car8dsqqx(l i.7n0k- vfhzb)up9 ry currents of 10 A in opposite directions. They are snv(qxb 8hd.s - ik9f7pu0)lqzeparated 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 from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directionsot8 eyrj dxzo(-;h8,sho+f5 g. The wires are separated by 0.20 m. What is the magnyfsojdho5+8tzr eg-x;(h, o8etic field midway between the two wires?

  Two long parallel wires carry currents of 20 cl :eimmj:/)i+lpd18 ;pa:u4gf l yijA and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributioi8fu :;ela: 1gj4pi pcld:lj /im)y m+ns from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same disk6 o,ddf- 5,aebr7h qjlzm96 rection. They are parallel to th 6sh d6mb,5 d,fq-rjzk9ae7loe z-axis, 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 5.0 A andi u3im,h rk s/y5.ii4t 8.0 A in the opposite direction. The wires are separathmyi.4sik/i 5i3ru ,ted by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular lo-:m w q*ox.eneop of wire of radius 4.0 cm when a current of 2.0 A f qx:n*we. o-emlows in the wire?

  A solenoid 20 cm long is o9hn y.t tk8 x:roz26xwound with 5000 turns of wire. What magnetic field is produced at the center of they 6:thzo8 x o9xk.2rnt solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carrirqy*erfi s5h 0bq).11 fmxvj9es a current of 4.0 A. What strength of magnetic field wi 9r*rivhbm)1e jys.q5 q0fx f1ll it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to geni9g o3p peuobe: / gvp+q:k,1kerate a 1.0-T magnetic field at the cenvoi,/:kq gk3eg+ 1 bupe:o9ppter?

  How many turns should a 10-cm long solenoid havet(t6a3y8rbur* z 3r h)lekv7a 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 rectan q-zzfw9;*yq23 28 gybla ijdggular loop of 120 turns that carries 6.0 A if its dimen29lyig d*gz8;aq fjyqb w3z -2sions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform ma)mv r:3wy,cz.jtb h:i gnetic field of 0.30 T. jwci.,mv:)h t 3rzyb :The current in the 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 wirre 37zsgumfwfjtl6( w 8g-mt0g q6/n 4e 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 oh26/xxbbwe9 current of 2.0 A is in a magnetic field of 3.5 T. The loop has an2eh 6x9o /xbbw 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 isa-cc()n+*q 8 uapjwid in a uniform magnetic field of 0.30 T. The curren8ai j+aqcp -(ucw)* dnt 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 a:nphxq97loq * a9c2luniform magnetic field of 0.30 T. The current in the loop is 2.0*: aoacxpqlln99 h7q2 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of ar(m6ovi ; uwz-w3vsy1yvfu7.uea $0.25 \; m^{2}$ 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 3x1b4 .ttbyppe (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 vpgyu6p8lgz+;tf 07 8a qqltf*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 1.0 kV and then moves into a ma*nr etm+qxq0rysl ;47gnetic field of 0.040 T. What is the radius of the q+ny lt4;sm0 rqx*7erproton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field (,qlu t aak8anoh0e(eb+piww /m1 0e/of 0.30 T oriented perpendicular to its direction of motion.pae qa1nm8 w(0 o+u/e,aehl ibk(w0/t Determine the radius of the path it follows.

  A beam of electrons is accelevw54; t8nvnjd rated 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 in84 t ;wvdjvn5f the particles are to be undeflected?