If the north poles of two bar magnets are k 09c.j8bg :7t6 bpamn pr9o9xq,fy lybrought close to each other, the magnetspmfo7,6l.j bbt 9q nk9y8aygp :rcx90 will

  If the south pole of one bar magnet is brought nem 2d27now6wv/rd4vn wm (vs(rar the north pole of a second bar magnet, the two (n ov4ww26 mr nr7d2wv(svm/d magnets will

  If a bar magnet is divided into two equal piec e,s)jtam. em)es,

  The Earth's geographic North Polemhsm6l /r1l2 hati,q, is magnetically a

  The south pole of a magnet points toward the Eart vq yq/qwc(ve +lyn. miy4z)r -/hx(b)h's

  An electric current pr+ 3f 9svhorc1otf+/ zjoduces

  Which of the followil)2wg6qg +qbe93 jbnr ng is correct?

  A vertical wire carries a current straight down. To thf8q pt09vba;q8k5xe b(ozyn y82 krk3 e east of this wire, the y0n8b3t2 rk a8y98( k5ofeq kx bq;pvzmagnetic field points

  A horizontal wire carries a current straight toward yy/9tgn, + jz euf 0(m0 r4c66iuba7ivxxsw2tzou. From your point of view, the magnetic field caused by this currebxust,ezvai /u6 xy02f46 zti9nw (7crmgj0+nt

  A current carrying loop of wire lies flat on k fz -gr(jahp zh+ueho).14yf m:5b3wy ,7h xma 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 thh-z(5pfuryyxo4hkgz)b1mf 7 3h :j ,.mh +aw eis current, outside the loop? The magnetic field

  A current carrying cne dz;q0jg x2qte*t :3ircular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a countercloj0g* :eeqdqtxtz2 ; 3nckwise 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 e a5a4t z+i4b4h .y8ivww1zmd is the

  1 T is equivalent tot qw93-kos ke,0b:mf sk.w dg4

  The direction of the force on a current-carrying wireh7 8 omoez fi4k3wx:n; in a magnetic field is described by which of 4khx:niem3 w;7zf8oothe following?

  The force on a current-carrying wire in a magnetic field is the strongest whez+6m-) uzhnb yxh-l 7rn

  The force on a curreng9mq/*11g, ciou y fqlt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current stzbt ; 07o/5h6;cbvzkpgv ue;yraight up in a region where the magnetic field vector ;bu/oek p ;0z z;75bvhvytg6c points due north. What is the direction of the resulting force on this current?

  A charged particle mo:3exrggi:sq38 5 ui wnves and experiences no magnetic force. From this we can concludu iwe :qgr8s53i:g3xn e that

  A charged particle moves with a constant s i/zqz /vxd63bpeed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting/3 / 6xvzqbidz on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetlq5de;s;p 6k2msn 2oy dabg/2ic force on this particle;y onm/ ; qsl6b2geapk2 dds25

  A charged particle is injected into a uniform magnetic fiezl.k(g0v1s v bcha0g3 ld such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the part(hba3k zg1l sc0gvv0.icle's weight, the particle will

  A charged particle is observed trave07a;p s* j 7pqmxhp+w dpt/i/sling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of+pw7d s07 xphts*pm/aj/;ip q the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform m43y6zjfo :j aragnetic field. If instead the particle carried a charge of +2e, the radius of the circular path wo:j6aj3o4y f zruld have been

  At a particular instant, an electron moves easv8 sii5 69-dv ngss1s xau9sr1tward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that ssg u r1d9vsxvia 1s-sn5986 iacts on it is

  An electron has an initial velocity to thek , 6h0lpodhn+5:*mu 5-b wadr.edjho south but is observed to curve upward as the resuld6 eo -k*npur55: o,alddhh0.b jhw+mt of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region 1zx4t7vzq xzl -y/fq4 0h l,2fyde -ve7lnu:cwhere there is a uniform magnetic field in the +y direction. What is the direction oc0zqv-yn l ,:hxz-u14l q/4tdyefl ve 2xz77ff 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 is4dxefe/- :tcqurn7z * we) ac9

  At double the distance from a long current-carrying wire, the strength of ths u;s;9cy a1jx7nfi 5we magnexuy n7 ifsca59j ;1ws;tic field produced by that wire decreases to

  Two long parallel wires placed sim7 6jb;xd ukp fui:e(5de-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 your left carries current away from you. From 6e;i5(mfkpdjxb: u7 u 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 horizontadr rmy. 3f,a .*trg +ub55fuptl table carry identical current straight toward you. From your point of view,*a55g,+mru. 3 ybfrpf .ut dtr the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equaly1f) jp;3 /uoplie em9 currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two3fe9o;u/pmy l 1iepj ) wires?

  A long straight wire carries current toward the east.lr ronr+(i.9n ,dk(7kfdp 2pr A proton moves toward the east alongside anni(nld r frrk d,9+7ok p2.r(pd 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 ths(-1mgt-ht ky e bottom of the page. What is the direction-(gk 1 ythm-st 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. If the0pch ny82q( vt wires carry current in the same dire( 0npy28ct qvhction,

  Two long parallel wires are placed side-by-siys-adly2y; 6ustl l pb- q*l1uy6a .4bde on a horizontal table. If the wires carry current in oppopt 66l*4;bsyul2y.ulay1b- q y- asldsite directions,

  Consider two current-carrying circular loopgoxf 2z3twz 1(hu 9hb/s. Both are made from one strand of wire and both carry the same current, but one has twice thzbuztx9/ (f hgo3 1w2he 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 strk m)bp,fr 0s0hsqhrwvmn *uhu*i:8 08and 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 m)p: vu 8hf 8w,0siksbqr*0urnh m0*mh oment of the larger loop is

  The maximum torque on a current c w+a uj,q4m+cfdyc;9d arrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vector +,ud4j cym wf9+da;cqis

  When placed askew in a magnetic field, a current carrying loop ggahd z 6uk,53 e+r2hxthat is free to rotate in any direction will exprad6xgh 5 hukz2ge,3 +erience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially allt*u.b) xf7 zvy electric motors? v*t7z. bfxu)y

  A circular wire loop lies in a horizonud1 i .ob w18wuesfv7ljpbe,:a59v(j tal 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 tb:.idbw 8uv lf,j je9au(1 p7w1ves o5he 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 a)9zhz*wus* a tym hy l/.5nqa;*q9ijxccelerated through a potential difference V and all* ;a*ntq xjqismz /lhzu)yh 5y*w9 a.9owed 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 charged particle passing through crosseddgy)zj9t hm0:. vdtp/13cn yi 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 dir0 p cgnmidy d/3.9j: y1ztthv)ection should the electric field point?

  A 2.0-m wire carrying a current ofohpts5r.x8f 4 0.60 A is oriented parallel to a uniform magnet8. fh t54xrspoic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directioky-ez. k vbfb8r qa29 ;c:cm9un 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 when it is placr93n t3 iqsmu.ed in a magne. 3t3qimu9nsrtic 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 0.050 kg and is in .rev v 83-6tzwua(kb ca magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the6ew cb3.rk-tz v8ua(v rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is thv9r(m tv8r2i de magnitum2(d9 rt8vv irde of the magnetic 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 * gm8o *iuu-+gbunx/ea 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 a speed of pj5pq eonwzm u1 45+ 8nz.1u,mxghe5 a$5.0 \times 10^7 \; m/s$ 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 nort4wm) xaltr:j- ru-4 dlh 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 of t 31ehhcet d4j nu1;isl5p j8:$8.0 \times 10^6 \; m/s$ 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 a9 za))r q)9cczfvmqj- 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 speed of,g b.8xupe1s s $3.0 \times 10^6 \; m/s$ 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 aqm dlj), -j bu fmp;-495mscka current of 25 A. What is the magnitude of the mag-5 pqs)b mfd,;j-mm9akc4u ljnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whj 0pw exbd e ::bufqf)*2* cr9tf)wy:hat magnetic field at the ground, 10 m away?b: fq:f) pxe*wbejdwf c0:9 *)2uryht

  How much current must tnjj v 5ja3,r5 v,cnohdbo +3- j:v1wqflow 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 o*jvcg (nwwa);yi*su ( f 5.0 A is the magnitude of the magnetic field due to the w j*nscuyva()iwg*w( ; ire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents 9 y,2vdrx7k aj+ n+ukkof 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 isd+j9x7k2rn k y ,vu+ka 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of: k, 54p73f oxlfaxho -y4giia 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field mi3x4hy,- g io4a7afko ixlfp5:dway between the two wires?

  Two long parallel wires carry currents of 2,+k vhj hf+, *vccsdk/1xve, b0 A and 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 wires thekevkh +b h+ c,s,jx v,1vdfc/* same?

  Four long parallel wires each carry 2.0 A in the same direction. They ar3ljciq d/5ha tc9em rnaq1;l,74d h q,e 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 f,er3tj7d9 qh;/nlcm5 q i,a1hlcd 4aqield does one of the wires experience due to the other wires?

  Two long parallel wires carry currens)1p56at b wuots of 5.0 A and 8.0 A in the opposite direction. The wires are s5 1a6p)butw soeparated 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 of wire of c6.t iofk*xg x ,m;mz/radius 4.0 cm when a current of 2.0 A flows in thk;z/ 6focxx im,.tgm *e wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What mr-vtlzj *nv 54agnetic field is produced at the center of tzn4-rl * v5tjvhe solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long;o.x-o2 44g r2gak7 rckzxaky and carries a current of 4.0 A. What strength of magnetio ;xc7kagkrk2groa -yz4 4 .2xc field will it have at its center?

  How much current must pass through a 400 turn c+ajnoxp ,c5/53 icoli oil 4.0 cm long to generate a 1.0-Tj axc,i c5i/opo5 l+n3 magnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to generate j:zoqs c:iy(j 8*o:ks 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 ixgma;e*5 )uuu-)sg 4a p(vwz120 turns that carries 6.0 A if its dimensg*ua )xazgp)ewv u;s4mu- 5(iions 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 (v 77zg k6kn3ix 6sias0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic fiel a73 xiv6sg67nk(ksz id?

  A circular loop of wire o6v zki)8dy xk8f cross-sectional 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 A4;mlhmwz 3l c/+p6l yc is in a magnetic field of 3.5 T. The loop l/4m lh3p l+6;m yzcwchas 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 wire of radius 0.50 m is in a uniform magnetic field of 0.3o2.t gjiz h7nfc7+fv z;m7w+k0 T. The current in the loop is 2;.+ctfz mkif2w h7zj7 7nvg+ o.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wig/96 )yvgvqe 7tr9kow99v vm9 q kx-npre of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Whapv7n69 kxrw ve kyo99/qvmv9tg)g9 -qt is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loopf)g1n v a wp8xbtmt ;cd-u1*a: of 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-chargewi w ,u8yz4e;yd 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 veloc 9wxme i:ffy 8ie+ /.:gjwgiq/ity $6.9 \times 10^6 \; m/s$ 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 c/3(iph qn lw*1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's relw3qn*(pc/ih sulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic -7an wky2kl 6pfield of 0.30 T oriented perpya-k wlk7pn6 2endicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differenc-vg)d*g80y e v*pple0njywc1 e of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.01 1c)yv-0dj pv0ewl8ggy** npe0 T, what value of the E-field is required if the particles are to be undeflected?