If the north poles of two bar magnets are brought close 1zaxea7 w65c c-jo ;zrto each other, the magnets willo jw; 61xa57ac-rczz e

  If the south pole of one bar mp zl m/0gs8fgqtaq*sl4+2 fs6agnet is brought near the north pole of a second bar magnet, the l/amst g*2ff08s+46 zlps q gqtwo magnets will

  If a bar magnet is divided into two equoe b3sgf.3+ o9 gb.mssal pieces,

  The Earth's geographic North Pole is magneticallysv9kmq9p 6 g fdf+mh75pul0s2 a

  The south pole of a magnet points toward the Earvmj8 o6tn:c68q y+i vtsxi.5qth's

  An electric current produno 1g: q)y7gsegdqpdu1, e9v 7ces

  Which of the following is covo4 *4eu-yrys rrect?

  A vertical wire carries a current straight down. To the eas* 1 emcjkembjd 7j,r28t of this wire, the magn7 k crjemj 1e8b,j*md2etic field points

  A horizontal wire carries a current straight toward you. From your wk7z 6k 5bbamnqf;8: vpoint of view, the magnetic fie:7a;kqw6 k fmn5v8 bbzld caused by this current

  A current carrying loop of wire lies flat on a table top- k 41s;1ztzybnp kd4q. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic fieldd441 sz- ;kzb1q nkytp caused by this current, outside the loop? The magnetic field

  A current carrying circ 7nl3qy3 +tv(sl b/t11iv vuepular loop 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, inside ths ynv 1l(l+/evq7i vbpt3ut 31e loop? The magnetic field

  The SI unit of magneikx9h7w c z*g5tic field is the

  1 T is equivalent toqncw9:-t p9su1tejd ;

  The direction of the force on a current-carrying wire in iu1 ;e +sd,.k. wykn2vffey+ha magnetic field is desu+kefinw v.+ y,yk2es1; hd.fcribed by which of the following?

  The force on a current-carrying wire in a mal z1 ;(2xowa k*.wzdlagnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal toykk8us 7az(g0n u. z*f zero when

  A vertical wire carrzsm6jgjs)m f 2.g7op/ies a current straight up in a region where the magnetic field vector points due north. What is the dirjm./2f gjs7gp6 zmos )ection of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. Frou)a 8f,x 4kvdem this we can conclude that4vx,ufak8de )

  A charged particle moves with a constant speed through a regxy8 bl((cn7 ,chtr0 kpxnf/+gion where a uniform magnetic field is present. y l8xf krt0+ bcpc(hn,/x7(gn If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The e:l;i8ixo.f3cwc 2 x vc3(rktmagnetic force on this part32t:eicw x;l(8 fvo.ci rkx3cicle

  A charged particle is injected into a unc 49(0woyxx vciform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's we4cx vx0 w9y(ocight, the particle will

  A charged particle is observed traveling in a circular path in a.l7.pd uifei: dh(j h/oc7q0a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path qo.: 0lpu dii.dfcj/77( ehah would be

  A particle carrying a charge of +e travels in a circu aiw6rv,e p,7jxij5s 6ao,-mclar path in a uniform magnetic field. If instead ths,p,e c-i5ia rj,6mw7 v xj6oae particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward a5g;nv ja-jeg 4t speed V in a uniform magnetic field that is directed straight downward. The magnetic force5 jgv-na;j eg4 that acts on it is

  An electron has an initial velocir eqpc 20n92xsaa* +qfty to the south but is observed to curve upward as the result of a magnetic f nfp 9q2qs+xrc0a2ae*ield. The direction of the magnetic field is

  An electron moving along the +x axis enhj9o (qhs y)ye)t//wmters a region where 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 of the mowh yq9s)//(jeh)t y page.)

  The magnetic field produced by a long stra:.h r,elks qlwif3d4z;o,qw. ight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of the *;qh9g3e ich62bs. i2 /zsekccjffs. magnetic field produced by that wire decre*b2q2ghsseh3.jf6 /9cicscek iz ; . fases to

  Two long parallel wires placed side-by-side on a horizontal table carry id)pcsub,x*h . eh8ciq4d2 v5k+ydue n(entical size currents in opposite directions. The wirkv4h8sh*ue 2 )d i+ uqx5edcpnby.c,(e 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 exactly midway between the two wires

  Two long parallel wi0 wev dqz.oiv: +vo mvn9:j0i9res placed side-by-side on a horizontal table carry identical cw9:on 9. iv0i+vezq:vd o v0mjurrent straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. T5rx9fw4a2 z);be ah3abe5 kyx+1ltkb he magnitude of the force between the wires is F. The current in each wire is now doubled. What is the bk eh5;abax42 k bt+fra9wz)lxey15 3magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton mocx9mg cvokwpw. p9-94ves toward the 9pvw-cp xm.k9w94o cg east alongside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the planewliko)-1x(eo4k6 gw e of the page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an e(w o-146lge ikeow)k xlectron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed sideo- lfpp3 x-8fi-by-side on a horizontal table. If the wires carry current in the same p8flifp 3x-o-direction,

  Two long parallel wires are placed side-by-side on a horizontal tablp fo:a- iv)j6xb7 gg7ne. If the wires carry curr n)jvpof-g77bg:x6aient in opposite directions,

  Consider two current-carrying circmpx ec/47vi d6k7(t-ifdzu k1ular loops. Both are made from one strand of wire and both carry the same current, but7/i-7u41ekzt(p dmcf vkid6x 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 circular loops. Both are made from one stn.-d/h( o sjvcrand of wire and both carry the -.dhovcn(s j/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 current carrying loop occurs when the angle between the 6calh- j:hmd/w8y*n5xr8 rda loop's magnetic moment and the my- 5/x* 6a8ch8r :n dadhlwrjmagnetic field vector is

  When placed askew in a magnetic field, a current carryinggh2-;miztay0 loop that is free to rotate in any direction will experience a torque until its magizatgh;y- m 02netic moment vector

  What fundamental fact underlies the olnsl(j k0 f,q1peration of essentially all electric motorsq fkl js0nl(1,?

  A circular wire loop lies in a horizontal plane on a table and carries currentn0knvqm+g as (.;xnsfr 4. 8so in a counterclockwise direction when viewed from above. At this poigman .;48nskssv. fo(+qnr0 x nt, 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 by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and chargj f 7bo/v qv2uq3n:s*ce 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 anb: vc3ovjqu* s7q2 fn/d 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 through crost9 bhnxu8s- .fsed electric and magnetic fields. The forces exe-bxu .89 nthfsrted 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 current of 0.60 A is oriented parallel2sv.s+yq zl8;fcv m3 w to a uniform magnetic field38q.;vwmf v+s2y sczl of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a curren4 d+f . pn; dwd98xmcah,m;jlat 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 on a straight wire carrylzwuip t5dk+5 m38(ps ing 5.0 A when it is placed in a magnetic field of 0.020 T? The wire mazut+dk i8 l5smw35(p pkes 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 ft02 vtf0ugi (aield of 0.10 T. What minimum current in the g0t f2aiv0( turod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T fp s:5xr 9vngzh:vyoa0q m,:9. What is the magnitude of the magnetic force on the protonv a: hzqvy:pxsmo9nrf5g 90 :,?

  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 spz. xssl0gjvzw/ z- g/+eed 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 sptxcj ,jfvcnjb*i0vb83y:u3 3 ut sc;+eed 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 with speedk, j,liz;(dwodl hxv6 e,6p :j $4.0 \times 10^5 \; m/s$ 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 of3*zegaavh+a1c 2i2 /pzw wcm5 $8.0 \times 10^6 \; m/s$ 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 wi07/vwd3o 9/ vj.t xmfd. weta rxx8:fyth 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 acceleration of the electron.

  A proton has a speedu*g5vvtb duz*uc*3b. 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 carr0 ckdpvyv 2q3.ies a current of 25 A. What is the magnitude of the magnetic field at a 0vypcdk v2.3qdistance of 0.15 m from the wire?

  A high power line carryissbrvf9; ,nv6+.8 k( cia wjying 1000 A generates what magnetic field at the ground, 10 m aivnca8+jw yr .s(fkb6v;9 si, way?

  How much current must fptntv.-lp6o 8o vw5* klow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from e0 j;dj) beek+2q ob1qa 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 thj2;eoq) eb k 0de+1qjbe Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires+ ))b/1wcq 0ze7d rdwppf z f+4qscuu9 carry currents of 10 A in opposite directions. They are separated by 40 cm. What is tz +/b79e0f))pdqzq udsprf+ uwcw41c he 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 4 rd2ej zj*4zv20 A and 5.0 A in opposite directions. The wires are sepaj * ze24vjdzr4rated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A d)jis 5wrn kd o52 h/nmhz8g89cfc7 t.r*bn9 lin opposite directions. The wires are separated by 0.20 m. *8c. 5f jn bhlgdrnz5tk79s2h8 m)cor9ind/wAt what point between the two wires are the contributions from the two wires the same?

  Four long parallel wiresabgd0yw 2tg6xu, 4x7,sbzh2+ ) a hnqc each carry 2.0 A in the same direction. They are parallel to the z-4aq uw gg bcha7d2t,xxbhs0 2 ,+z6yn)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 currefwja3sf g+ 2gx5 cv 4gf*m,mc(u8bj 7bnts 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 wiresfb*5fx w m4u8ms2agj (3bv+7g,jccfg.

  What is the magnetic field at t ogko9-4u ys nmigf 8;:uiq/ 2xw0sb9the center of a circular loop of wire of radius 4.0 cm when a current 2k u 8ssugygnw 4x9qo bi:f;-t9/ m0oiof 2.0 A flows in the wire?

  A solenoid 20 cm long is woun huuz z5fr1*li+ k1t 9c4)cqond with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flowkf9ozri ucl)+n4c 11z thq*5 us?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.ylg0,g a-3eb) (ucs3v 9sg xpe0 A. What strength of magnetic field will it have at its cente-g0ss()vux ,e lecpg g3a9b3yr?

  How much current must pa9 (ls kf,i t0h05spo8fkhyr v4h+ol5 sss through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field ak 5lot4,r hyplo8svf(05kfsh+i h0 s9 t the center?

  How many turns should a 10-cm long solenlx4,nhqke)wt tojb .) )q wv08oid 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 r x +lcdd7/1 m5h)lwrstectangular loop of 120 turns that carries 6.0 A if itwds1)t 7x cr5md +hl/ls dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unza10py3dmtq : iform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is thp0a t:m1zyq d3e magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional area hp)tcdlh y /m95f;j q83ud/-j4ysqfr $0.12 \; m^{2}$ 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 is9: 3;an jziceh in a magnetic field of 3.5 T. The loop has an are3: zc; ahinj9ea 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 rad*6gjq mnw/ +ppius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2pjg+6m*nqpw / .0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire oube-9hkcb p, os,il ,9s fzx6vp+i37 vf radius 0.50 m is in a uniform magnetic field of 0.30 T. T6is cupp-of ik3,z+ hv,x9vl,7eb s 9bhe 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 wire loop o.pkuj:0,fcl62b r slougzc1t1 pp;4fro91o cf 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 particle nf7h: x-(ksjx(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 ioni r 4ro1 joc5sgh:v/szz+6su.4kl (rs 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 1.0xbp4 ;i18 ufgukh;x kzk+9*sr(yrsd: kV and then moves into a magnetic field of 0.040 T. Wh4d8+p (zxgbx ku sykfrsk9;r; *uh :1iat is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a maj3 leee1(1you gnetic field of 0.30 T oriented perpendicular to (e1jeeul1 y o3its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of z 7: mlq:ostj/10 kV before entering a vel:mls :t7o qzj/ocity 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 particles are to be undeflected?