If the north poles of two bar magnets are brought close to e.i5o0 /oi tedmach other, the magnettio0.5 o/i emds will

  If the south pole of one bar -n.;goasu n tuffjk8)7gs aujo5b.9- r+0bu emagnet is brought near the north pole of a second bar magne7 u.fn f5og ub-aj9 ;+8s0k jsgbe.no)t-ur aut, the two magnets will

  If a bar magnet is divided into tcgpe*en /9u0 swo equal pieces,

  The Earth's geographic North q3cpi)y9 ug*i Pole is magnetically a

  The south pole of a magnet points towardmv g.wb8p 9-pueo )rct+9icm3 the Earth's

  An electric current prodtv5 wl7n5 6ygiuces

  Which of the following is co50mbp3xf z g ya+:7yltd14miirrect?

  A vertical wire carries a cur6g.u*6lx*w dazadg( b:oxk*i rent straight down. To the east of this wire, the magnetic fiel6kgb* lz* :(xdaod iuwg*xa.6 d points

  A horizontal wire carries a current straight toward you. From your point of23r -ozcwz9r 3qhpv :iu2 vl;o view, vlozvq3ohri :2 ;92rwpzuc 3-the magnetic field caused by this current

  A current carrying loop of wire lies flat on 2ga*9,dqs hc;rlig b(a table top. When viewed from above, the current moves around the loop in a counterclockwise ais bhg9, l2cd;*rqg(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 li+qoemmy 9 2r)zjd7o,76fhmp s es flat on a table top. When viewed from above, the current moves around the loop in a counterclockw)jr7hopz9yq msmdm+2o 7e, f6ise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field t7-6n lve e8+y f:wzwlu-w/beis the

  1 T is equivalent tome mte181xve,up-e59p:r jkw

  The direction of the force on a current-carrying wire in a magnetic field /8e )ud2ri 4trw5s n9kpzs7svis described by which of the followingedrri24ss wz 9 8/vsnp7t5ku)?

  The force on a current-carrying wire in a magnetic fieljeo 2y (f8s*+ p+qekm dso1b)ld is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero zp)avhx1t. i pr(l7y+ when

  A vertical wire carries a current straight up in a region where t cjkcc rzcje0 (/4.a3the magnetic field vector pejc. (rcz0ctkc a j34/oints due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic forceqir-x j.i muee,pkyx x48/,3s5 6deue. From this we can conclude s34e/ee ,i du.u ipx,x6yqm8rjx5 ek- that

  A charged particle moves with a constant speed through a region wh(-ilr ;jfn0j6 mk tk;cere a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximuml0k- rnjmjf ti(k c;;6 when the particle moves

  A charged particle moves across a constant magnetic fieioypl*va25a8gu5bj 7m1 :cwk .vtc +u ld. The magnetic force on this pa tw5u+g 1paa *:vm 8oyuv bk72i5jcc.lrticle

  A charged particle is injected into a u+,eif5+luz z6a 0syni3cdz ;oniform magnetic field such that its velocity vector is perpen i+insu,30a+ ;6zy 5clzfeoz ddicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed travelingcytik 61l ag3a:f 24ig in a circular path in a uniform magnetic field. If the particle had been traveling twice as faai3 62 gal 1ickg:tfy4st, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magnz2 a 13.equiyietic field. Ia. iu32zyq 1eif instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instanw.93gmx kr:)iba 0fai t, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that ac.xaw:m)9fkg i03ba irts on it is

  An electron has an initial velocity to the south but is observed to cur0 q 1okz;dw 9t4 rl yl8m5ip/f(x0:yj n.khzlwve upward as the result of a magnetic field.4.19 ;:ny/wiyl80 od tzl0rjpxm f5wqzh(k l k The direction of the magnetic field is

  An electron moving along the +x axis enters a rze())su 8 pxxeegion where there is a uniform magnetic field in the +y direction. What is the direction of tx8e)uex( pzs )he magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced bk gp/t59g rvl.t; g-way a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, u3g ) ym+guh0 i9vxw*lthe strength of the magnetic field produced by that wire decmhguv ug0i3 y x*+w9)lreases to

  Two long parallel wires placed side-by-side on a horizontal table carry iden tui/v*+9j)rxy4x8ybrquh ;z tical 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 view, the magnetic field at the point exactl9bxh8ijr/u xzu*4 vry +qy);ty midway between the two wires

  Two long parallel wires placed side-by-side on a h()xx,u d s;ojwfh 0*yzorizontal table carry identical current straight toward you. From your point of view, the magnetic ;zh y,d*us)0jwx( foxfield at the point exactly between the two wires

  Two long parallel wirh)5i;7dj g r/sc(u paces carry equal currents. The magnitude of the force between the wires is F. The ic cu5(sap;jgd7 /)rhcurrent in each wire 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 6do3aa,.jm ei-*ln bk moves toward the east alongside and just south of the wire. What ik m6iaodlj,bn3-.a *e s the direction of the force on the proton?

  A wire lying in the plane of the page carries a current tov11 djpf+q-30izveh d ward the bottom of thedqdfhj z31v0v -pi+ e1 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 your right?

  Two long parallel wires are placed side-by-side on a horizontal table. 2-t4p.pr3ot a4wuawqIf the wires carry -t pw2w 3uaq4aop.4t rcurrent in the same direction,

  Two long parallel wires are placs5pr0on ze c ve,b vb.w.pa1p r;1q/s+xv19pfed side-by-side on a horizontal table. If the wire+pzeq0s b9p5,rpvs.oxw1cp.1r/f b vn v ;1aes carry current in opposite directions,

  Consider two current-carrying circular loops.t8s f9p.y+ wj3c:bqjh Both are made from one strand of wire and both carry the same current, but one has twice thtq.+pf9s8 w3 cybjh: je 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-carrying circular loops. Both are madebg)n/vi6 n39yjcfs /l 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, th)6lybgs9 njiv3 n//fce magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle b0yi,e;:-v fn yl ugea4etween the loop's magnetic moment and the magneti4fenlyi:0-e yvug , ;ac field vector is

  When placed askew in a magw eauk)zj5y*:netic field, a current carrying loop that is free to rotate in any directioz5kuj ewa y:)*n will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electr.8z3fi/ka(rfexv.)df;ki nzic motors8 iz(nxfa3df./k)fez ;. k ivr?

  A circular wire loop li;/l*5klgq lqaz.h 7yv es 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 pkz.ly;llh g5q*/vq7a oints 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 throug(fs7 g(/ijxv b8xst1:pc ,uaah 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. tu(gb,xcsjva8pif1(:x/ 7a s Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector cone.oj ssv8-q;vntrkuq01m0 w9 sists 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 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 electricv mj eo9u 0-n81wrk.v;q0 sqts field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented paraluc uuqqp*v 221lel to a uniform magnetic q2p 1*u2uvcqu field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current5gftbgpsi o9( b0jf slz1wcy4)7ga2; 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 ojrwoup/ ;9)f1asn u6wn a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wir9 u owu6pr1;njf/a)w se 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 o:kv1zkjs *-ua magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic fo1so-: kvjz*k urce to cancel the weight of the rod?

  A stationary proton is in a unif* ofa3)koegkdyn)2l 6orm magnetic field of 0.20 T. What is the magnitude of the magnetic force on the2onfl *dy)akke )o g36 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 spesbbms3np)8+3 4f h-dadq2k(ikzo ts/ed 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 go.q. otf/;,u wrfb ,ua speed 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 no 6+nvpi+-ra vzs)ly 0trth 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 speed o;6qzbtg52vr a* )czq mvt r2l(f $8.0 \times 10^6 \; m/s$ 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 spes0qo1.9(fij8t gk3i:4 ua(uxicifp7 l-qyby ed 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 speed2mi: ljj 10ffy 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. Wbk i4vme, iue2o6aje 1e: mxq:b5qs (.hat is the magnitude of the magnetic field at a die:i:see .4ubjiqo b2ma156m (kqv ex ,stance of 0.15 m from the wire?

  A high power line carrying 1000 4kzxjf /;d6g .ib(mvdA generates what magnetic field at the ground, 10 m dxi d. /g4(fbjvm 6;kzaway?

  How much current must flow fuc 7wa5k*fea -d jib:ug84-xkor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a lon u;7i. i4/ cj/ix4vkkt4v gspdg straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wii47c t /jv/uk.sd4v4kgipxi; re equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires ut z,t5vc4 q60zv0 wwdcarry currents of 10 A in opposite directions. They are separate 5utqc60z,dwv vzw0 t4d 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 dires (-viiuj- 4ttctions. The wires are separated by 0.20 m. What is the magnetic field midwa-t-ji i t4vsu(y between the two wires?

  Two long parallel wires carry currenj-7t7hob : rs 2uybc5dts of 20 A and 5.0 A in opposite directions. The wires are seyr2 j bh-c5o:bs77tduparated 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 carrrwo st)l+5ejb1 2a-g ny 2.0 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 positioned in the x-y plane. What magnetic field does one of the wires et slbj+e-2 wr )n5og1axperience due to the other wires?

  Two long parallel wires carrvj8c.1 qd, pipy currents of 5.0 A and 8.0 A in the opposite direction. The wires are scdp 1 ,p8.vqijeparated 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 loop of0ss 4 i -xa7jllqs6;lx wire of radius 4.0 cm when 7si 46sq;0jxl-lsaxl a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic field i*ln rc61//s+pnuuuxky+b :hps produced at the center of the solenoid when a current of 10 A huc *:xun u+/pn6k1rp+byl/ s flows?

  A solenoid with 500 turns iz+b . ze:)l9wir/bnby71lh wu s 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it + 7 rlzi9wne u1:bhwblz./)ybhave at its center?

  How much current must pass through rt7 y4qj0 pt7m4)i6xd*upd wma 400 turn coil 4.0 cm long to generate a 1.0-T magnett )yq4t7m0i dxpudm pj6rw*47ic field at the center?

  How many turns should a 10-cm long solenoid have if i6 j9d8mmttj edvt2r 8-t 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 recvto, w)dd8119l.efbgxnwo.;balurn *x. l5 x tangular loop of 120 turns that carries 6.0 A if t 19abuo g l x..vd)we51noldlxr8.w,;x *bn fits dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of(jaak970o 2 ozfyj4df 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plankd0f7zf j ojo4a (9y2ae of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-secin onv;g+q p4z.abk:gq 8ss// tional 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 currenhw b**mp2shq uu(w2wr;e3* g wt of 2.0 A is in a magnetic field of 3.5 T. The loop has an area oq g*2(hsrhb2* wu wm*wp;u3w ef $0.12 \; m^{2}$ 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 j1gb38 ip6n--swbwg a 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 6gwgwbjn-i8 3-b asp 1torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of mav :1vk 9diivq,+ry:k g9j3nradius 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 vq:r1dgav i m:y9+knk3,ij v9the plane of the loop is parallel to the magnetic field?

  A circular wire loop o j/fuqgq ( 4t;tn+ty*lf 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 spectromete 4jn r/7ub/q)wh ;gu:/srqe cqr, a single-charged particle (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 ionuq0iy-pi7m i-10 ytdr with 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 moves int.+.ow 4/jjz mxsdop2so a magnetic field of 0.040 T. What is the radi+s2 jw .jp./4 oszomxdus of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fiel jamx-sl3gcn72h q9gwr ve..2 d of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follor223 langv.w - m.gxec9j7shqws.

  A beam of electrons is accelerated through a potential difference pt9-xum2,bgp yr.d7s of 10 kV before entering a velocity sppds,.b g2 -xtmyru97elector. 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?