If the north poles of two bar magnets are brought clom0ixl dl-jp2:8icx5 zse to each other, the magnets wi:z2m lj58xldx-pi0i cll

  If the south pole of one bar magnet is brought near the north pole w:+3g uy ) 2x vrycn)ybeq.om8zjh3 z2of a second bar magnet, the tgz) yxev.2mw )jc3n z82o qyr3by hu:+wo magnets will

  If a bar magnet is divfody3 c 3)ror3nowif1*dj3p-ided into two equal pieces,

  The Earth's geographic North Polemtmyn sn9q +2 7*narr jbdg8++ is magnetically a

  The south pole of a magne vmvd6rhbie/5cm.c-q ; 9p -kst points toward the Earth's

  An electric current produ my38v(px +:0tyanak3q3m v ayces

  Which of the following is correct?fdc9ma 1r/yslw5h2 ) f

  A vertical wire carries a current straight down. To the east of this wk4pmsw0 ( jt3fire, the magnetic fielt(pk s3jf w40md points

  A horizontal wire carries a current st)7mnt l1b7xg rraight toward you. From your point of view, the magnetbr17lm7x ) gntic field caused by this current

  A current carrying loop of wire lies flat on a table top. x5sndm/. kno+qgyw0(When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by th .wno(y5kqsnx gdm0+/ is current, outside the loop? The magnetic field

  A current carrying circular looprudu7 .0ldk(x 0f0gh0 s bj7+tz)kxr u 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 cur0 hgb0)uxk7rsz7l+tjfx0.0du( rdk u rent, inside the loop? The magnetic field

  The SI unit of magne*xqde j o3cgtbf k4(3;tic field is the

  1 T is equivalent to lgys w8uwb t0,v4z1 )-mg,hgm

  The direction of the force on a current-c:z 8o6o rknhb,arrying wire in a magnetic field is desnr8ho6,k :z bocribed by which of the following?

  The force on a current-carrying wire in a m lwscf ;g *01kqkzw3ai:0dis b.m.+ ddagnetic field is the strongest when

  The force on a current-carrying wire in a magnetic fieog- * e1:p uazrtuf-y0ld is equal to zero when

  A vertical wire carries a current straight up in a region whe s*:qsdnc s)i7re the magnetic field vector points due north. What is the direction of the resulting force on thisqicn: *d)ss7s current?

  A charged particle moves and experiences no magnetic force. Frw: 2zzxv3;w4 znjit;jrqo w*e n+43geom this we can conclude thatj *+nz w von4i;:;ez4tzwerxj2wq33 g

  A charged particle moves with a constant speed throuykn f62apf729a )/nadm g taf,7njgc-gh a region where a uniform magnetic field is present. If the magnetic field points straight ,f27ft2y anajc k nm7gda9a/n g6 f)p-upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a cd qmovd33s 1 6;eo2femonstant magnetic field. The magnetic force on this partics3dd1 3evm 6;e2ofmq ole

  A charged particle is injected intaq;;kz9)/hp )bto7 effwx3 fc o a uniform magnetic field such that its velocity vec be fo9x3) ffhq;z/k p7)tw;actor is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling: sqtvu l.e/4v in a circular path in a uniform magnetic fiv :st4uevl q/.eld. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e trdlh q9ge0)qn80 d m+7u/nkc qwavels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the r cqe/mdku0qn7l8h9gdn0q )+ w adius of the circular path would have been

  At a particular instant, an e11u( gnj s gkotv ils26mg87:apqnk48lectron moves eastward at speed V in a uniform magnetic field that is directed straight down naq4n6v8klu (i1p js1gkt:7 8m2gos gward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upat 6z0zvg 3th1ward as the result of a magnetic field. The directio1gz6t3azth 0 vn of the magnetic field is

  An electron moving along the +x axis enters a region where zx(f .k(:eco uthere is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the elecfu((:koxcze .tron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wir *xm+8o/c(yfv la. kcocp 6y*ce is

  At double the distance from a lu n d ,c4eekff)4iii++ong current-carrying wire, the strength of the magnetic field produci funi +c44 eek+i,df)ed by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tabln2 -v ;l,ol0za)qwq+t ztx 6vxe carry identical size currents in opposite txvx 0avto)+zwl 6z,n-;l 2qqdirections. 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 exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal ta dr 8d rq)ggfs*:fjqhkpp)-n6 ouk)5w/ *k5 dible carry identica/ sppq)r:fogwq r)-i5uknfdd85kjkg 6)h *d *l current 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 currenp8wgr 94-xs g2wnevn /ts. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is t2nepvg g-w4w9r8 n sx/he magnitude of the new force between the two wires?

  A long straight wire car dgqy* 0v cjj)/lyz5.pries current toward the east. A proton moves toward theyv*qd cj pl.05)z/y gj east 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 current toward the bottom of t54-8gcq je1gzrudr2 phe 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 gu e-rjzp1c qg25d84ryour right?

  Two long parallel wires are placed side-by-side on a horizontal (l t,wp+e ib3rtable. If the wires carry current (3ilw, t+pberin the same direction,

  Two long parallel wires are placed sil1av k+cvu *l,de-by-side on a horizontal table. If the wires carry current in opa+lvv* 1 kc,ulposite directions,

  Consider two current-carrying circular loops. Both are made from one strand of2 9)q6fjz1 ujshf2e e.s+gaer wusefqh)gs6 +r1f2j.29ja eez ire 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 magnetic field at the center of the larger loop is

  Consider two current-carrying circular loopsaiv)t:shi8; i. 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 moment of the smaller loop, the magnetic moment of the larger li i hv;iast8:)oop is

  The maximum torque on a current carrying loop occurs7gdd-p3vqdtstz+81 k when the angle between the loop's magnetic moment atgz v813- dd+sktd qp7nd the magnetic field vector is

  When placed askew in a magnetic field, a dmefi sts.4in 789 wzj2p9gy8 current carrying loop that is free to rotate in any direction will experience a torque une99gt7n2jps.f iz4mi8 yd8s wtil its magnetic moment vector

  What fundamental fact underlies the operation o8 zpxf q4c ;ep.m+8sr9itpin/f essentially all electric motors?p;i x8r94+npzfis p8cqt.me/

  A circular wire loop lies in a horizontal plane on a table an3-qc- zycp18f i iqz*nd carries current in acp- 1y 8ni-3q*czif qz 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 by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q i96/ uuw5bci /sfze;zj gjrz3 .s accelerated through a potential difference V azj6.e9jgs;b/w 5/uu z3 fczir nd 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 consists of a cha 1xtbjwaseo 2,ru g/7v-oa f(8rged particle passing through crossed electric and 1,bf/wras2j g(o-vatu ex 7o8 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 electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented paralleee( z)(g qaows r0k:t0l to a uniform magnez0)o(k0er( w gsqet:atic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directionul qo89 t*y5t2p tm(mo 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 carrying 5.0 A wvl6hm x 4.aakrv6r (u3hen it is placed in a magnetic field of 0.020 T? The wire mak6lh.xu4rka (6m 3 rvvaes 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 magne// rzjy5x-s9rh flqw-tic field of 0.10 T. What minimum current in the rod is needed in order for the max9 rr -hq/z5j-yl f/wsgnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What isnq r 0rmg*9 tkr6huxd09 sl,y+ the magnitude of the magnetic lymrn06h9u x9ks+d q0gr,*t rforce 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 wik/s;+ 1rdnh bvth a speed 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 ahzgtxm . l-3woja:j/: 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 north with speed:2nd- uzdofp- ,khyf)nxefd/9(-he l $4.0 \times 10^5 \; m/s$ 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 sp- 6f;l4 -rcbv c7 a6r tor)hr)aszv;dveed 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 smdnrz:,) hfb :peed 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 of (xmzp61qjt i )$3.0 \times 10^6 \; m/s$ 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. What is the mam o0.7xtxq6-hvfuf t 8gnitude of the8ofmv 7t 6q- uxtx0hf. magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 Auioy b1s* a*mt9jpum. lj, k 4hm*cx:g*0zca( generates what magnetic field at the ground, 10 mj1x9(4*,t gm0zc s*a*hoajmpuyul mbk i:c*. away?

  How much current must flow po9 n.lm3)ylfq,la0 pdi :0xb 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.l,hhk; p4jjm tgh5s720 A is the magnitude of the magnetic field due to the wire equal to the strength ofshh m;45 ,2g hlpk7tjj the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. The ;;lq hvpxj3t8y are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire an3lxvp t j8;hq;d 60 cm from the other?

  Two long parallel wiq9cckz- a wp2-h/2twt res carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betw/2 hckwc-zt -pt9 awq2een the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dire/ i,se+ba7 ztr) 30vr1k uzceactions. The wires are separated by 0.20 m. At what point between the two wires are the sertr/,v+kbiz 0)17uza e 3cacontributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction.9p)om ;z)pmpt They are parallel to the ;p tz mm9))popz-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 n u(-4ip.rqf4iu a1f s5.0 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 wi(4q-inua1is rpff. u4res.

  What is the magnetic field at the cent4 u ysv/: z0s5r4/rjhxknceb2er of a circular loop of wire of radius 4.0 cm when a current of u5 v4j/e:ysn 4rcrz h0xk2sb /2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tur;qs79wtno*0kh gb rri6/(l xcns of wire. What magnetic field is produced at the center7oqx0 l bi(rhwgkrs9/tc;6n* of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and ) jpcjc/ viu /b4z/mk(carries a current of 4.0 A. What strength of magnetic fiejc(u /zb4/pik /c jm)vld will it have at its center?

  How much current must pass throug67.8 di y+u 72kejdamismp1 khh a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fi+16i.u82dk sm7hayij 7dpmek eld at the center?

  How many turns should a 10-cm long solenoid have if it is to g5bbesc*.d7u0 sku pxv*qw +*zenerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rjl1). ml*5jghh 2n likectangular loop of 120 turns that carries 6.0 A if its dimensions )n5gl2ljkh*1. ijhml are 4.0 cm x 8.0 cm?

  A circular loop of w s.,+6t xlnpo u94pp+yrtfon2 ire of 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 loop is per9f o6u+ 4lp +snpnxorp.y2,t tpendicular to the magnetic field?

  A circular loop of wire of cross-sectionagayl)4(f1+ gnhkun4j g12m ji l 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 carry2l;bqabp q pvd. hvoe)7 +2xrxb ak1)e*0/irping a current of 2.0 A is in a magnetic field of 3.5 T. The loop has an areroblaq 2ba0+)1hxb*pd;e i.vvr/k)qep 7p2 xa 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 s6m)((d-hg dpob- mi;oip3y jradius 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 magnetishopd;-3pd(j( 6 go-m ) biimyc torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fihx qg8 rgeq9mf 9o+h1)ss6f.celd of 0.30 T. The current in the loop is 2.0 A. What is the magnetic f6o)ss1rx e9q.h98+qg hcfgm torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area wsgy+g)n0 ). aj tmdiiq ,trw/dj5):h $0.25 \; m^{2}$ 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 par 74j. tmih ds(t;w7gchticle (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 ww4sw6bsua oi( j4mq w561ac- 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 throue7e ;+srpnr 7bgh a potential of 1.0 kV and then moves into a magnetic field of 0.040 e7br;+ns p7 erT. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fiegs9 cs.8kn7o w,-hn fyld of 0.30 T oriented perpendi78yhnn,g ck 9ow.ss-f cular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a pote2iznm nq :x,,w1sjj/7aq k*wh/l foc6ntial difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a valuz6, low:fq 2xwqikc jn/*j7n ,a/1hmse of 0.010 T, what value of the E-field is required if the particles are to be undeflected?