If the north poles of two bar magnets are brbv ij4*agfo87q3rc/ iought close to each other, the magnets willfigj7qb3 4*o cr v8ia/

  If the south pole of one bar magnet is brought near the nr;gi ifb.ht +8orth pole of a second bar magnet, the two magnets will8h;tir bi+. gf

  If a bar magnet is divided into two equb438 qmhqnty u:qn2r9 al pieces,

  The Earth's geographic 534ydqzz kq2sd4 dmu9 North Pole is magnetically a

  The south pole of a magnet points toward the Earth'sg 1cw*6rvm1frn f+en.

  An electric current p sb ); tc1pi0z+ yqafue-a5fk,ehnmcb+1q3- yroduces

  Which of the following is 7g l .y-gmbi6k xe.hx9correct?

  A vertical wire carries a currvlss74,al;o -h jg.r sent straight down. To the east of this wire, the ma-s; l hor4svsa7 g,jl.gnetic field points

  A horizontal wire carries a current strai uh houe73-c6oght toward you. From your point of view, the magnetic field caused by uu c-7h6oo3 ehthis current

  A current carrying loop of wire lies flat on a table toww(blj j6+ao,k3bz( a ;g bhk-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, outside the gja; (jlw-kao3hb+z( wb6k,bloop? The magnetic field

  A current carrying circular loop of wtdiw4d8ri ; aa0n 8augbeefs +y: *7(lire 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:l;de*tfge (i848a0bauds+a w7y nri caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fig omyqct. 8.3y vba79held is the

  1 T is equivalent to,sv0a+oin0mo *a1sk b

  The direction of the force on a current-carrying wire in a magnetic field is dgf2*ph+a0 ;a9q ehv *4zajy zeescribed by which of*pe+;za vg 9*qehy4 h0fjaa2z the following?

  The force on a current-carrying wire in a magneti0p; f0eiuz ia9c field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to je-d t6w/ fk0t;lo p(ili+r5szero when

  A vertical wire carries a current straight up in a region whl9sqvrhyk *kny j8ab .8.j*7i ere the magnetic field vector points due north. What is the dirl b9j*kr8ay8yjn.7ikh qv *.section of the resulting force on this current?

  A charged particle moves and experiences no magnetic qfy- /pzlgq/3force. From this we can conclude p-l/ qy qf/z3gthat

  A charged particle moy+h)ynk+kl q mb e,*sg cj)w01(cn7w uves with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when t1w)q)nnwe7chbsukg0,+l j *ymk (+yc he particle moves

  A charged particle moves across a constant magnetic field. Thepds.eo3de9tps p :9-p magnetic force on this p-dsp.es : tpd3ppo9e9article

  A charged particle is injected into a uniform magnetic fiel4x7/)n)bdl b2bbi civd such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the padin )bxcl/ v4b2b7 )ibrticle will

  A charged particle is observed s 2;sqwnnh,x 2traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circx; w2nssqnh 2,ular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform magnb*d7 slx5 xh3z c94cnfetic field. If insteadx5flcxd3* c s 49zbnh7 the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eando(aws rpbfg 4rs 7bp5*m b.e)--ap+stward at speed V in a uniform magnetic fg4 sa prpn(s.bm-dr bo*ep +a7)b5-wfield that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity se) ;qh ejz.n7to the south but is observed to curve upward as the result of a magnetic field. The direction of th;.7 sj qzh)eene magnetic field is

  An electron moving along the +x axis enters a region where the4n*apbvtls3 9 ( 2mb1igfzdv) re is a uniform magnetic fie 4asgzdmvlvtb)f9pi 2( n1b 3*ld 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 produced by a long straight current-carrying wire ism3, uoe06t .dwfcb **np(h dnf

  At double the distance from a long current-carrying wire, the st p*wrgbtyx-w:af -z0 +rength of the magnetic field produced by thap -:tyrbw gzf*0+ awx-t wire decreases to

  Two long parallel wires placed side0 7* e5xqyg5 lsdmtn+c-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on ym x05s+*y5ng7tedql c our 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 horizonta.n2yskslp a* 9-p5l mal table carry identical current straight toward you. From your point of view, the magnetic field 5p. -l2*9naap slkmsyat the point exactly between the two wires

  Two long parallel wires carry equal currents. The magn14jpe9g m ma2yjht11 citude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the t2 41ahj py1mmj1gce9new force between the two wires?

  A long straight wire carries current towardm *z c2et)-b)cm2nsbc the east. A proton moves toward the east alongside and just south of the wire. What b)s) mbznce- c22 t*cmis the direction of the force on the proton?

  A wire lying in the plane of twp)) 7vg08bgac dtjm hn9h8 .z3wby 3mhe page carries a current toward the bottom of the page. What is the direction of the zbnh gm .3vw3a78dtw0)mycp8 9g)jhb 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 a1d- g)fj/hr 7lmy kuh( horizontal table. If the wires carry currenth(1-gh7yf) rkldujm / in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. ludt skha9 ;3+o3w2mp jbs 5y- kj:147nuisve If the wires cask ld v:su3kmbj j 79w-5a1i4ht2 upse+ ony;3rry current in opposite directions,

  Consider two current-carrying circular loops. Both are made fr0ggg58ckj 4bsi -3gei om one strand of wire and both carry thbgg0g8ei 5k3 csi4-jge 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 center of the larger loop is

  Consider two current-carrying:+kt*syhd)v tk / .vov30wtbm circular loops. Both are made from one strand of wire and both carry the same current, but one has twice t h*dmvvt 0so.:3) +tkkywt/ vbhe 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 occurs when the angle bettmg)l9-c kn*f7mnpz( ne:z:8u7bu(nm/ c q fwween the loop's magnetic moment and the magnetic f(cft*gwk7nu(qpec)nln7mzbm: uz9/ : fmn 8 - ield vector is

  When placed askew in a magnetic field, a current carrying loop that is free vq9uaiqa;+p, to rotate in any direction will experience a torque until;pqva ,9iu+qa its magnetic moment vector

  What fundamental fact underlies the operation of essentiallp4t))/zkjw p fy all electric motors?)pw jk /ptzf4)

  A circular wire loop lies in a h+yt4 abu eplgkp2- 40u xb5bb4orizontal 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. Why2b 4 4bb54+k up tgbexp-l0uaich 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 char:ig(2j ).5qvblc xhtvge 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 av):j gvlq2b (c hx5it.nd 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 throkezl cw4zby7v h) .q(eff4)/rugh 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 stre (.fc 47kz4bl/wq) y v)erhzfaight 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 orientedbz8cbk6g y 8hdc-*-;l2f ksoj parallel to a uniform magnbb-dsjko-g h*yc2flc; 8k6z8 etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of c 3r7p:n ctpazm ,pt)($30^{\circ}$ 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 carryingd60kadd . r6 qv7s: kogqcyj(6 5.0 A when it is placed in a magnetic field of 0.020 T? The wire qq r6va6y:o (sj k0dgd.dc7 6kmakes 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 a magnetic f(;k7z t 5yp yty 7p mon.xjgo:3f*z-oubl .*heield of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to3yz; hj5p t:y7n 7l*k. * mgooux.o(bz-yp etf cancel the weight of the rod?

  A stationary proton is in a uniform magneti lfie+0dl if d3c9ta3,c field of 0.20 T. What is the magnitude of the magne9fa ,feiltl3i cd0 3+dtic 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 speed of ej,fh 19ayk7rlhq* j )$5.0 \times 10^4 \; m/s$ 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 wvhz(yz4d6fo b s:.p2of $5.0 \times 10^7 \; m/s$ 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 travelinzghchv5 808qdzb z0)ng 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 withnho qbw:b.q;-24s .mpmu sm:h y4k/ui 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 speed of *,,xy;; bed.6sas wtquaq0ep$8.0 \times 10^6 \; m/s$ 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 3lhd;1fmybjo 5z*r;bmhc2sjst b7r; a;. a 5o 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 v4 bm7jl*tlje4z,w9m7b-mbr 7qr b a0current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from theqb m mrt7l -4lr4 a, bbzw*j097ej7vbm wire?

  A high power line carrying 1000 A generates what magnetic field at the gr )s ),ioa(edg rnm1 h5nxzr:2found, 10 m,ngzoe()rh s): r5mn a21dix f away?

  How much current must0brl-rcdn 7b , 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 current of 5.0 A 5c+u4 4ao gva9ql 9r 4cicnnmg4yrw7(is the magnitude of the magnet 7mgino( 9c544ywg rl4cv+caau 9n4qric field 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 wiresqpjvdgb: 26b+;uw(c b carry currents 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 fro2dbbw +gvc u6 :(bpjq;m one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppo/f9 .il+o7z,m,utontvc i,u bsite directions. The wires are separated by 0.20 m. What is the magnetic field+ottlfi9 ,z v,unc7bu , /o.im midway between the two wires?

  Two long parallel wires carry currents of 20 A an bs:hwy*vvtg *+mg;,h1 w) kktd 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wik t;wvhg*bv:twym *hsg,k )1+res the same?

  Four long parallel wires each carry 2.0 A in tvvvd y2yu,-g;tu;6 n*--hal a cc0)5mv accojhe same direction. They are parallen 5 coy6 ;2cclu jv-;v-tc g,-)yh0du a*vavmal 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 experience due to the other wires?

  Two long parallel wires carry currents of 5.0pwa atz veej8/o36bjz j6 -l8cq9 l9*r A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find lealr6 v/6zjpzq c 38bte ajo*8-j9w 9the magnetic force per unit length between the two wires.

  What is the magnetic fieldei8,dmxt v7z ki .z.6x at the center of a circular loop of wire of radius 4.0 cm whenk,ex iivzx7t m..8z6d a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic )mupnvn0259-nbh0iw b* htl8a( rbx nfield is produced at the center of the solenoid when a current of 10 A flbxn rbh8( 0mlw)b0pnu5-2 *tihv na9nows?

  A solenoid with 500 turn+gn y1uy(5/i -pnp2ye o 1a1cy;wmxt ls is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field / iwuc ma; yp(1l 1o5y gy2t-1penxyn+will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm loo.lm6j qd;w4e* yqspfg/os8 8ng to generate a 1.0-T magnetic field at the jlds/oe;ywfo 68 spq mg4*8q.center?

  How many turns should a zz-q9;s 4dx2 draz*t5pmo 0wi10-cm long solenoid have 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 rectangular loop of 120 turns that carries 6nv1e rnfs)3 y2.0 rne s 132nv)yfA if its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform man.8ko9fl +bsxx z*ou 7gnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetn* x +z7u.s89foblk oxic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectioz4p 9ww1qwc*.lgy2e mnal 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 ikdqd x2c0 xp9,s in a magnetic field of 3.5 T. The loop has an areax k x,d0qp92cd 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 is in a uniform m. jy1*zkd ft3tagnetic field of 0.30 T. tztj 1d ykf3*.The current 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 0.5gc un5kkn o )( -o0yb2+uf;huu0 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whonfc2)0uh;- ugyk ( bknu+ 5uoat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of arg4d2iihd21i drj 2kd4ix ;0, e: mcemsea $0.25 \; m^{2}$ 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 spectrometer2xn6ysb oapth/w/n,y j1/w)e lu+5lu , 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 ion with 9 n9owl (sfhuqgx, z/(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 into a magnetiuietb1nu3+;ln a: ae* c field u1e; t beaai+u*nl3n: of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic k.k+ptt3 ,k) ls, rrkkfield of 0.30 T oriented perpendicular to its direction of motlpt .rktk 3k+, )rksk,ion. Determine the radius of the path it follows.

  A beam of electrons is accelerated throu9oc nlfspo. -ggfm)cy9 f3o4 d8a81ox gh 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 the particlnogy . sg1cc4fpo am8fd )9o-ox8fl 93es are to be undeflected?