If the north poles oc-g-gtgm h7gzdy )b8 jfh i)y7g--9t)6ukcij f two bar magnets are brought close to each other, the magne-i-7jybg87ymhjc f) -gg6gi9h d) tg ukzc)t -ts will

  If the south pole of onybp tl+cj( ue1;g*a,v s9ig1oe bar magnet is brought near the north pole of a second ba1as (i tgj p+bo ;cyveu9gl,1*r magnet, the two magnets will

  If a bar magnet is divided intu-/60ysto1pkkd58qcxfv k o)( tz x6d o two equal pieces,

  The Earth's geographic North o;n5 xxud4k n wr zdr9)2kb+n.Pole is magnetically a

  The south pole of a magnet point z; -ojjrp .2j: ahtlwa9r kg6)f,wyu.s toward the Earth's

  An electric current pro.7 qz ,qxm0obnx1xh2nduces

  Which of the following is correcl bt b65a5)ykl(n esv+t?

  A vertical wire carries a current straight down. To the east of this wire7))5iw mc6lwxi w.go) y(6b httft1 qj, the mabt( m6t 5.x wgfi7tw)h 6 jowy)ql1ci)gnetic field points

  A horizontal wire carries a current straight toward u9*m4d j jf7rgyou. From your point of view, the magnetic field caused by this curre7 jdfu94r* gmjnt

  A current carrying ld+i6be7 xw 20nbt srf.oop 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 field caused by this current, outside the loop? The m+ft x idsn0br276be.w agnetic field

  A current carrying circular loop of wiref0v ci. xe l+:9bcujw0 lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sj fic+xceu090w b.: vlense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic f 3crj-;bkhtxs-n 64ddield is the

  1 T is equivalent to ,w -,el1upemep x8up2:q1pms1mkyp23 swb +k

  The direction of the force on a current-carrying wire inxk y2wlt9g0jpn w7i (; a magnetic field is describ2njwl9 x;(ypk0g7i w ted by which of the following?

  The force on a current-carrying wire in a magnetic field is ttawp2gl35a +j clne)- he strongest when

  The force on a current-carrying wire in a magnetic field is equal th0 sq(+xp9uz0+qk ghwxzako8 , g6+tbo zero when

  A vertical wire carries a current straight up in a reg.:o 7tli1tm laion where the magnetic field vect oiltm.7a lt1:or points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experienc- a c*;9m gn je+8caxzvb3o.vges no magnetic force. From this we can concluc9m -vjo+nb. aa x3g8gcezv*;de that

  A charged particle moves with a constant speedpx j3qzx p,e-: through a region where a uniform magnetic field is present. If the-:pjp zx3qx e, magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a72tojvjc5 h u0 constant magnetic field. The magnetic force on this parti2v 7cuo50jth jcle

  A charged particle is injected into afb:qf:-qik.wqsdqf w85: -k j uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the p.f- i w-dsf:kqqjq8:w :bkqf5article will

  A charged particle is observed traveling in a circular path in a unifo+o9f(a0aybnq bv; t8 orm magnetic field. If the particle had been traveling twice as fast, the radius of bbn f98otayqo+;a0v(the circular path would be

  A particle carrying a charge of +e travels in a circular path in a +m.a dhwq-j5b uniform magnetic dm bq5j.-aw +hfield. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant,;dkq;ph xdt/ 6 jv7meqt.y 3u+ an electron moves eastward at speed V in a uniform magnetic field that is directed straighqjhd/ptxeq7;k.t 3y d v6+um ;t downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south buplz p+ur 4c;x3j:r( zwt+ 57+w dgjpikt is observed to curve upward as the result of a magnetic field. jr7twrpl zd ki3( gp5+w4+zcpj:+x u;The direction of the magnetic field is

  An electron moving along the +x axis enters a region w44n ::4/4l w ow2xmygbem lmozhere 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 out 44ow2z/lb:mem:m x gol w4yn4of the page.)

  The magnetic field produced by a long straight current-carrying z54ej:kgl+rl wire is

  At double the distance from a long current-carryiy1n5 - i)vllxxl4gn lj7 43spjng wire, the strength of the magnetic field produced by that wj7)ix- l l4jv x3nl45 pl1yngsire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry idg08eero1d3 dwak wv64entical size currents in opposite directions. The wire on your right crvw1ed w6g3 o 0dae48karries 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 wires placed l(vl q/uh8my;side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactl/ qvl8huy (ml;y between the two wires

  Two long parallel wires ca5qy.7lkq+1kt(lbs wh rry equal currents. The magnitude of the force between the wires is F.t kwh7 1q(qll+b.ks5 y The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carxc r3sjtml3*5ries current toward the east. A proton moves toward the east alongx53s tlr3m *cjside 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 towa (/pbnfe ncm-havg60 ct,i*9zrd the bottom 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, fro9zv0gichbant- 6f/ ,ep( * mcnm your right?

  Two long parallel wires 4/8aela+jcmp are placed side-by-side on a horizontal table. If the wires carry current/pjmce 8a4al+ in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the-c.hdn 6nj 6na wires carry current in oppo6hn-ad6n j .cnsite directions,

  Consider two current-carrying cip-w8kqge) +;l + ffgbyrcular loops. Both are made from one strand of wire and both carry the same current, p- ql; k+ fg)w8bef+gybut 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-carryinh b8 i-duuv/6uj)t )(chq gsy-g circular loops. Both are made from one strand of wire and both carry the same cur hg)hycb6-- u)tsjv(/ud8ui qrent, 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 current carrying loop occ6 5ks,u.znyd vfdx 0l(urs when the angle between the lon,y k5.vdd6xs 0lzf( uop's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is freej+svap bea7 61mye2 6e to rotate in any direction will expe1+2 ea 6aj6mv7s bpeyerience a torque until its magnetic moment vector

  What fundamental fact underlies the operationv :ac(*f4bgo hvw,a0wa5do 6z of essentially all electric motors?4b c0a f,6o5h wvzvd*ga:aw o(

  A circular wire loop lies krgv(zw 8t3l*omo y *-in a horizontal 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 tends to lift off of the table because of the torque caused blm*tkv o*(g wryz3o8- y the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated through v owesl6v q;w p+m:w)7a potentialw;+ vwsqw6)7l:vopme 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 mass of the particle in terms of B, q, V, and R.

  A velocity selector consssoge9c78 vjsw(m7yujk- m:: ists of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move in a s( ssu:se77vj gcyo8j w9mk -m:traight 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 06wpd eha/-4v9ty; hwo7y0fcs .60 A is oriented parallel to a uniform magnetic fc v /dae-y6p;4ths7 0fh9ywowield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction o 3pc48dv qbvkhrji 0 t0+4r9ugf $30^{\circ}$ 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 carrt:379*oeemg4lne i m dbz(:tj ying 5.0 A when it is placed in a magnetic :l4 *e37:ttz imnbgejdo me 9(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 0.0gyk r lw 76k0:0hojlz650 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in ord: 00r6 j7owzkh6 lklyger for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field o p/cj4 g *rgc7lu*v jqvko16(tf 0.20 T. What is the magnitude of the magnetic force on the/j jk 6qrt *pc1logvug c7(*4v 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 s3n4e-fdi c3tpxy 03jd (oxrt-i *dp x+peed 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 ofc -fw sy88nb-ye 1hr.p $5.0 \times 10^7 \; m/s$ 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 gula omr5a5dt8/3y 8jspeed $4.0 \times 10^5 \; m/s$ 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 speed of 5mb g(:/f3yr vbuka*g$8.0 \times 10^6 \; m/s$ 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 lovs fl*0, duy737igs(mjw42zop l0g 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 od;.7jzcxu lo3ufl- t/ f $3.0 \times 10^6 \; m/s$ 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 /b81mhsivp0c . +e22e vmwnkfa current of 25 A. What is the magnitude of the mac2b+w1e2vimmsef8 nkvp.h/0 gnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whk3:n)6 q rrsqyat magnetic field at the ground, 10 m away) rq nr3k:q6sy?

  How much current must.y s c2kuab;pf s3.m:h 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 carrying a currenmnyu p+ u7 tssy/:08unt of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of thu0/ 87 p+ nsnt:smuuyye Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite dire i gi:t67dan*pctions. They are separated by 40 cm. What is7ti *ign a:pd6 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 wim: (j,x0eub)i gwc0pxres carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20)wx,j 0ec:g0xumb (pi m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A a -lt rkxd+afw .x5g,9tnd 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point betwl5 atg,+- fx9wkxtd.r een the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry xm+ byc7lo9 5y2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm pyy5o7m bcx9 l+ositioned 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 kbac9kh0gws3-j5w k1 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between t15w -0hkjgwkb 3ks9ac he two wires.

  What is the magnetic field at the center of y9nna zdcs.*2,c k6srew3 z;au *wk. oa circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wir cy nod.re;3zwua *k9 , .ks*z2csaw6ne?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic f,)musmh dqgg cj.0j f-c;)q u)ield is produced at the center of the solenoid when a current of 10 A flowsmqcq g,j)h- ud;m0c)jf.)gu s?

  A solenoid with 500 turns is 0.1;u;ea af+ l*ta0 m long and carries a current of 4.0 A. What strength of magnetic field will it have at ;*at;ulef+ aa its center?

  How much current must pass 4uaah;)*quao through a 400 turn coil 4.0 cm long to generate a 1.0-T u aaoq;h*4)aumagnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is t 1 qppy.y65garo generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangul g8l j4hf7 e2aca14wsmar loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cmshc1 g af72la4w4 e8jm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0 9jbef+-mh,7nt xw2pj.30 T. The current in the loop is 2.0 A. What is th2wh tf, 7njbpm-j 9+exe magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional(4 pv+) vp/dpk2ui oni 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 carryist7dul3gz*8 nqki:u0 ,vcm8 +tzig;i ng a current of 2.0 A is in a magnetic field of 3.5 T. The loop vlzungt;d7u:,8m+tii*iqg8kz 0 s3 c 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 w+ex;e3 ui+7dic8xr(tayk o.icw u )(eire of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A.idi w(e7(+ x3et8 aoir ;cyue.kxuc+) 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 seqy1 :v/vlrlq1:o3wg8od *eis in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the v:y:lv/ g ldo813wqeers q *1omagnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of q8bf;wq:d3h law9kz6area $0.25 \; m^{2}$ 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 ,gl4g2yuxd 8 7lm9nek (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 veloci8j 3 /p w4mjxxtpyx(8 xr+bdsji6* :gjty $6.9 \times 10^6 \; m/s$ 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 magnetic fi4hw ixra:/lhg6cwv 0 (eld of 0.040 T. What is the radius of th/v6 lwgha 4 i:0hxr(wce proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magtur y-lvwimy1+oai +i1w,4ki -i 7+s nnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the rairn vl i -kmtyuo+a-,1i +w71ywis4i+dius of the path it follows.

  A beam of electrons is accele 1vuxlgk(lld +:j 40zorated 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 if thg 4:(kjll+0d1lvuz oxe particles are to be undeflected?