If the north poles of two bar magnets as; xf s;,9(hqht5 /k8f3cbmvxrxos v3re brought close to each other, the magnets;(q5s rbhscf; 9mx83xkhxfv3o vs/,t will

  If the south pole of one vd 33ur+n4qog9peh ,gbar magnet is brought near the north pole of a second bar magnet, the two magnets wie9h3,qod u pgn4gr+ 3vll

  If a bar magnet is divided into tdw ye9.uc vq, ah2i7pk6f ;2gyszu s(2wo equal pieces,

  The Earth's geographic North n eoy9s50 i lw nrl4j:w,yg9:pPole is magnetically a

  The south pole of a magnet poin nm(lb p/46lqots toward the Earth's

  An electric current pw n;im .a:p3z1u:evaproduces

  Which of the followingpi6a enp -e*p6 is correct?

  A vertical wire carries a current straintpj.5 uy1(n( gt9uk fght down. To the east of this wire, the magnet (ktpfyu15nntj.9 gu( ic field points

  A horizontal wire carries a current straight toward you. From y jibl9--ujv 87obl9f kour point of view, the ma v jlklfu9i-o 7j-b9b8gnetic field caused by this current

  A current carrying loop of wire lies flat on v0w44gm plw8 6fszd g9a table top. When viewed from above, the current moves around the loop in a counterclockwise pvmz d46l0g8sw4 fg9w sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table tobrf1e.:b;l5 3cry b ;l1ldvipx5wslnd j,f(9 p. 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, inside the loop? The mag rsyd9nr5:1(pe b.w vilfjc3lf b;, l;x15bldnetic field

  The SI unit of magnetic corgd0qr7cnf5m lr g,a64t6(field is the

  1 T is equivalent to4c/(b4ncc wsq, xi yr9

  The direction of the force on a current-carrying wire inx(y ll)4uqx57ul1bzx a magnetic field is described by (l)bzly7 x1ulqu4xx 5which of the following?

  The force on a current-carrying wire in a magnetic field is the stronges t:kho0nqq sj,+q(x:yt when

  The force on a current-carrying wiccdb.5e -g f6d* ,yxlsre in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in b:3t s:q x9.eabjz:o/e ibwg0a region where the magnetic field vector points due north. What is the direction of the resu/e .:9a:z qi: 3gb wstboe0jxblting force on this current?

  A charged particle moves ageo)z*x qvn 8tof1z 57nd experiences no magnetic force. From this we can conclude thaf zzv*en 1xq5)o78gtot

  A charged particle moves with a constant speed through a regionzzmxc bj/ccx/x2a7: v 6 t.7fi where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetx czt7zbv .i/ax6f: xcj7/c2 mic force acting on this particle will be maximum when the particle moves

  A charged particle moveoxlz 3tq93 )kr;el.nq bj7qox iz1(a4s across a constant magnetic field. The magnetic force on this partiz 3o)qbi7x (1;4n.qrjo e9 laxq kztl3cle

  A charged particle is injected into a uniform magnetic field sovq;u74 yb5ku z6 m)mzuch that its velocity vector is perpendicular to the magnetic field vector. Ignoring the pqou kvuzzm74 6)5b m;yarticle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magsg8x k 6zp4q/rs /jjxxdds3;9netic field. If the particle had been traveling twice as fast, the radius of the s6rzs3dgqx/4jx8j9 / dp; kx scircular path would be

  A particle carrying a charge of +e travels in a circular path in aal a7 6a y+em3/xhmzmb ,2t2ny uniform magnetic field. If instead the particle carried a 2xhm ne36yta zm 2m/b7a l,ya+charge of +2e, the radius of the circular path would have been

  At a particular instant, an electrolt(m:z ls776 *kvk hocn moves eastward at speed V in a uniform magnetic field that is directed straight downward. The k7h( vmzl6 s c7lot*:kmagnetic force that acts on it is

  An electron has an initial veloc d) ; 5h duy*qr(-rnz(adg7rabity to the south but is observed to curve upward as the result of a magnetic field. The5dr r7ad;qryh- (n g()*zdb ua direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is n s4+z6ngpk+ca 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 out ++cnzn4g 6skp of the page.)

  The magnetic field produced by a long straight currenn 4p2j0b8ci wjo.lclr1g.mo ,t-carrying wire is

  At double the distance from a long current-ca9r15;kps4vlf qrj9sl rrying wire, the strength of the magnetic f4rskrp91l9jv sfq;5l ield produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizon(j4cni6 jj7yn/g( q1 y+tsyyftal table carry identical size currents in opposite directions. The wire on your right carries current toward yoj4yjnjynyg 6+c((f/t1 7yisqu, 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 placed side-by-side on a horizontal tabfj am+y nk oa.zg .:zdys:15opee4fyfo ,d*9(le carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between gy :ey.,5pja.o+9osom4 ffe( * dknayzd: z1fthe two wires

  Two long parallel wires carry equal currents. m;ly jfo:8nu-evq6-5 s7 fi utmmnx+r/d8u :w The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wir;fj teno ys-n+dm7mfi uu 8m/w:v56q :r8x lu-es?

  A long straight wire carries current toward the east. htf+jsqv ivx2,-e/ -lus8q.fA proton moves toward the txvfs. -u+qlis f/ jeq82,h-veast 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 currenloh 3.k tltvz.xd;5b 2t toward the bottom of the page. What is the direction of the magnetic force it produh. t5;zv.lx32otb l kdces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed siuv (z)6c ykus.oq u9f.jh88 ksde-by-side on a horizontal table. If the wires carry current in the same direction(889)hfjs cs .yuzuko. 6kuqv,

  Two long parallel wires are plac ty,x- fw5w:q.n 7itvbed side-by-side on a horizontal table. If the wires y5ftw bt:.ix -7 ,qvnwcarry current in opposite directions,

  Consider two current-carrying circular loopsycc :h36) odny. Both 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 magynccy :h63 o)dnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. ia7)me ejijl+,s;tes ede xy 4u.y-33Both 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 moment of the smaller loop, the magnetic moment of the la ts;+ysxd uee.jl 3) i74,em ey-ejai3rger loop is

  The maximum torque on a current carrying loop occurs when the angle between the,r4sz x 2e c)af5)vuft loop's magnetic moment and the magnetic field vector if ru5fa),x4z)vc2s te s

  When placed askew in av p72 mr+eo-rh magnetic field, a current carrying loop that is free to rotate in any dm-e+ v7p2ro hrirection will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electef 6 h8te//knzric motors?t6e hkfn8z/e/

  A circular wire loop lies in a horia (ek4gcsb/2j)sick/zontal 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 the north and dips below the horizontal. Which side of the coil tendsk cbke2sj / i)cga(4/s 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 accelt,t9u*wbrq o s:4ag w+*a e:voerated 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 velocity of the particle. Derive an expression for the 9w+,4va: we*sttuar :qb*ogo mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crjw9n:u c ,f6tzossed electric and magnetic fields. The forces exerted by these fields are in opposite directi6, wfz cuj:nt9ons, 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 current of 0.60 A is oriented parady0y:ycmrh :eduxv+bn44 ks2l8 d ;l:llel to a uniform magnetic field y; 8d0reuvnys4d+bx:2 ylmdc:h4k: lof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a diriur y0o p+70i0n svo)gection 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 carryit -w;(jc p4yow4hr4cdng 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an th- 4o y r4c(jcw4pd;wangle 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 a i)f ogo8:( g:b (jkhklmagnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the wlj o k i(bgogk)f::8h(eight of the rod?

  A stationary proton is in a uniform magnetic field5ue/j8pdo7 ek of 0.20 T. What is the magnitude of the magn8p/ejduoke7 5etic 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 s .0tma3xpa2oh mwc3xjnqvl o 3,r.t12peed 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 spwygwkha7( i/ 1eed 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 wixf,.rkh*ijo* v vwa:0j *1 qzwi:- wknth 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 n-y8fyd0f9s7 w9 sq c7alaso l mx7*e9a 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 speed of gj8 2q9n7 5b y.ffrq3waqw5oz $8.0 \times 10^6 \; m/s$ 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 o5b hh*js4jo 9df $3.0 \times 10^6 \; m/s$ 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 xq ,n45tftc2)l hp+evcurrent of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from n4+te2 xt fqlcv),5 hpthe wire?

  A high power line carrying 1000 A generates what mago v0 ,xbz9c7-dc;agt3 txfj- onetic field at the ground, 10 m awaycx j9 o7--a,x3otdvctfz0 g; b?

  How much current must ,y3lpo - ojcw3e-eno-flow 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 c ll9fg9n2dxnnp7 )mk z,q,0kparrying a current of 5.0 A is the magnitude of the magnetic fien)dln,k lm f70x9z,pn9kgp q2ld 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 currents31t+nk 7nqyci 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 isk qnc+y t31in7 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currentgrbn *sus hh3+d5 i08bu njq1.s of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwayu50hn j18r g+h s*sib3 bdq.nu between the two wires?

  Two long parallel wires c8o.o7nvsg. lccqt,v2 arry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At .7 ovq,tn8o.lcgc 2 svwhat point between the two wires are the contributions from the two wires the same?

  Four long parallel wike:)c*) )ar/p mzxp uhres each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners oer ukxm *)a:p pcz))h/f 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 carq 9u1yg*ab-g f nize5 :kss*p80cmt y(ry 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 two wir* gs(in1f *s0y-tk9zbpgqm e:y8a 5uces.

  What is the magnetic field at the cendxa prxm*jh 68gn*/z/ter of a circular loop of wire of radius 4.0 cm *mx/dxnzh 8 / j*pg6arwhen a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fieldt o 6wyuv h7/2oj2s9fu is produced at the center of the solenoid when a currenh 2joow29 6fystuvu7/t of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Whab16yuu ;xc; e*ar.a qpa8ce c0t strength of magnetic field wiq0cup6x;u*;ce .ra acy8 b e1all it have at its center?

  How much current must pass through a 400 turn coil c wdkqhh6z mvblph 0q;) jfx*7m z*92-4.0 cm long to generate a 1.0-T magnetic field at * kz zqp0vhwqc lm)7xh2d;h69m * -jbfthe center?

  How many turns should a 10-cm long solenoid have if it is to generat:3hy w:o .ehnjcg1do, e a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectang5mpf( /rvpi c.ular loop of 120 turns that carries 6.0 A if its dimensions are 4/pm(f.5p c irv.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field ou*4p, h uyiza.c) qzy+f 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 magnetua 4+,yi)y .puzqhzc*ic field?

  A circular loop of wir /y4derap. ip*bhlsb.efo6 .9 wsm .u2e 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 current of 2.0 A iscugr sd 3 sk3o;;soyn5 s;)rb1 in a magnetic field of 3.5 T. The loop hary; 1s os;bgsrd3n5 u) 3;kcsos 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 oi/ +g;(puss vpl2y5lanp l)m*f radius 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 g5(; y*uivpm lspl n)+a2slp /loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform uo jqrmajj zj;:pi c-bm:kj ( ./;/rz(magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when thej.(; jim/jo:cjz zbm kruj ra/(q-:;p plane of the loop is parallel to the magnetic field?

  A circular wire loop4v 8aha9j3/b9d fau.qc3 ebck 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 ow7ie2v81 ay *tv:tq2y , wwxdparticle (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/u1l r -3qvm1ovewp5m ,okv j1oik*8b+s0c zf 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 a potential of 1.0 kV and then move x +ihqmt*7 *x+:l6jy-avni nts into a magnetic field of 0.040 T. What is the radius of the projx7ih-+m6 + yvxn l*n*qitt:a ton's resulting orbit?

  A proton is accelerated from rest through 500 ycn4k on. op05k9 sxveqlf:z 3s-3s7v V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it foco vq k :o79s.3ksylzn-n pf4s0ex5v3llows.

  A beam of electrons iwcm 3s2+btwxnk2 oxw5r5 ; ax;s accelerated through a potential difference of 10 kV before entering a velocity selector. If the B-fi;; 2x3wxow 5bt+r2nmc xsawk5eld 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?