If the north poles of two bar magnets are brought close to each other, t+pg/xr 2m ,hne fu8wv;he magnet8,+x;uep2hg nw / fmvrs will

  If the south pole of one bar magnet is brought near the nzrrqpgt4e1* 3.rls7n f qw vo)iy gp-4,c7to. orth pole of a second bary)p*zqc1.3 ,vl r to4r-qsnpgti.7fr4oe g7 w magnet, the two magnets will

  If a bar magnet is divided into two equal pieces,- z-gu ncpcd7,w c+b2f

  The Earth's geographic North Pole8 r,u23aoen4su 5zxko is magnetically a

  The south pole of a magnet points tb9kn f9.vjlde2x5 (rsoward the Earth's

  An electric current pqd2u p7kkltsvo1 ,-6a-6 aioaroduces

  Which of the followiny:gkf6qz mc ,8:6 mwylg is correct?

  A vertical wire carries a current straight down. To tz 1iaebsar5+2 v3rj,p he east of this wire, the magn,2je5pba3rvzs ar+ i1etic field points

  A horizontal wire carries a current straizk20l;om .;aonnw6yb ak;z8g ght toward you. From your point of view, the magnetic field caused by this cumo0n6ok a8y; lb;nz;.2 wgzak rrent

  A current carrying loop of 6pc7 nir+ikmek m7nr- w01+44ufhsjy wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclorh7 n p4ursi7we m+j6n0 imy4cf-k1+kckwise 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 lies flat on a table top. Whena kcco4w s45m5 viewed from above, the current moves aro 4w sck55ma4cound the loop in a counterclockwise 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 is thevj8yh9xz/i8q 8+ nkn l f.s(jz

  1 T is equivalent toi evtxgv . 3;,xhjr96wpwf5 4(hvm 8kr

  The direction of the force on a current-carryimc,;xcs0/v3 .kpa) 1psy tjjo ng wire in a magnetic field is describetov.sx ky3s/m0j1 pa)j,p;ccd by which of the following?

  The force on a current-carrying wire in a magnetic field is the strongest w6g u tymo dkvr-7syzpv 72x+0axry93;hen

  The force on a current-carrying wire in a magnetic field is equal to zero q- .ri 7/ipxbn,i6 enp-md r4gwhen

  A vertical wire carries a current sto37sgk wm::v +4o ayjhgr +)firaight up in a region where the magnetic field vectr +of 3:hj +o4sg)ym:kvwga7ior points due north. What is the direction of the resulting force on this current?

  A charged particle moves and e e9 cpniox)-cwgvt.j8v -, g mkt8y4m.xperiences no magnetic force. From this we can conclxk mit.9-c-tnevmjwycg.po8 )4 g ,v8ude that

  A charged particle moves with a constant speed througvx 2x/ / q wj:omc0grmrnuc(/7h a region where a uniform magnetic field is present. If the magnetic r mr7/n(uxw2 /jxg m0c:c/oqvfield 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. 5 zmq2,tuc ,xsh,rfg.j8guz +The magnetic force on this particlx,g cfmsu 5h+r. ,2z8, qgjutze

  A charged particle is vq, 5ku(/cq.jkokw8d injected into a uniform magnetic field such that its velocity vec/,djo( wc5v q.q8kkkutor is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is8 h f9gvffs(;z observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twicvg9(sh f8zf ;fe as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circulaor56md h-g4 bwj cqg ,ygox783r path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path wou75myhx w,b- 34 jcgrodg8go6q ld have been

  At a particular instant,c frv3ge/i7x ;w.e5 bj an electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magv;7g fewb3xejrc i/.5 netic force that acts on it is

  An electron has an initial velocity to the south but is obse9zwxkg) w5w-hpu n/r5rved to curve upward as the result of a magnetic field. The directio z5ww nk-xuw )grp9/5hn of the magnetic field is

  An electron moving along the/4nfl4axi uu 5;e u2jxj/zwec /j ik:/ +x axis enters a region where there is a uniform magnetic field in the + /junxujli4xz24 w;fejk//:uc / iea 5y 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 01jld5*scv h2bi- xac by a long straight current-carrying wire is

  At double the distancrz7o: u,,c xlce from a long current-carrying wire, the strength of the magnetic field produced by that wire decreal z7c:c,urx,o ses to

  Two long parallel wires placed side-by-side on a horizontal table carry i/(mm4bn64g vn sd9 ult /7dckcdentical size currents in opposite directions. The k(4lgb/t mnnd u6sdcv/9c 7m 4wire 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 placedh5vf 20 v6rax,p on ydi)y9w.x side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the0)9hf,x.a52pyyn6vivd rowx magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the forcl pha,0csae7*pikbpt9 + 7 g2te between the wires is F. The current in each w+ h9g7paatstpie2 , k *0l7bcpire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current tmez o 8/**qjdmoward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on *d jz/m oe8*mqthe proton?

  A wire lying in the plane of the page carries a current toward the bottom o stos29 +4+kcoujfi j*f the page. What is the direction of the mag*u9kjst jio c +so2f4+netic 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 o j5+ylev p)n;w*5sal ;rqoif9 n a horizontal table. If the wires carry current in the same diy lora5j q*s;)pw e5l 9vif+n;rection,

  Two long parallel wires are placed)dvn6mra g .9x side-by-side on a horizontal table. If the wires carry currm9 and.) 6rvxgent in opposite directions,

  Consider two current-carrying ciria-xjt r f0y/k0hes4- cular loops. Both are made from one strand of wire and both carry the same c-ijx-rsyhe 0 /k0 fa4turrent, 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 lcb5-et*( v:ex bseax;oops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Comv-ee *a:b;5 xbx c(tsepared 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 whetcqdc,,e6 :a2rwy8yiy 1q 4qw n the angle between the loop'd q4 i, qy1 62ycrcqwwyte,a8:s magnetic moment and the magnetic field vector is

  When placed askew in lk hoc6g n1a))e,* rika magnetic field, a current carrying loop that is free to rotate in any direction will e ck,1hal )k6n)io*egrxperience a torque until its magnetic moment vector

  What fundamental fact underlies pf; vwe,tb: 5lq i..clgv:/vpthe operation of essentially all electric motors,cqpfvtpv w/.ie:;bl. lg5: v?

  A circular wire loop lies in a horizontal plane on a table and carries current8gx7u1pvl ezf j45l f* 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. Which side of the coil tends to lift off of the table because of the torque caused by the currents inte4j*ex fu1v57 plzgf 8lraction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerated throug.a jc:*)z-zj af/aypx h a potential difference jf .cz:j)yz ax*-/aapV 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. 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 crossedyck s37st; e1c(ayh) t 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 magnitu t3ytscs1c 7h(;k)yaedes 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 parallel to a uniformapke0.7x;tnu7) tzo i magnetic fiet)xp 0 7ni7tk.oz e;uald of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a aya6(oxg8a . 7mvs-bgdirection 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 st9rro pnlq 7x4e wq)/ch8rg2c ,raight wire carrying 5.0 A when it is placed in a magnetic field,r p / wqc4r2xor)ec8gnqh l97 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 lod 4q3tds1 ,s:v3pzu yq6vgd-g4z +yvg ng has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rodzyvpuddgydt 4 +3g v:s3zsqg,41- 6vq is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in ax a2x+9g. o7sjh7owlhkc ja5 ; uniform magnetic field of 0.20 T. What is the magnitude of the magnaj7 lh.g9x2wko7a +; 5sjcohx etic 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 wiug1ge2 *2d fsbth 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 a speed wjkx/ nqlntc7/0. 4muo v;;ic 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 fsj)2o -+awq kh6 2vdkwith 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 wi-m(xmbx;zhb c) 5txr (th 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 ,ct1h;41)c3moyvi b:ejyvbv$8.0 \times 10^6 \; m/s$ 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 or ktde yq2.zm/9. uf 5tc7r;yzto14lg f $3.0 \times 10^6 \; m/s$ 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. ws05 ;) etzc-pyolalr30s l4 x/in )ueWhat is the magnitude of the magnetic field at a p);i/)5zu 3eo4wrx0n-es0 lclat lsydistance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field a7wx 26x( z8 a6kyqcujwt the ground, 10 (62u jc 6kyaq x7wz8wxm away?

  How much current must flhge 7:4uc7qmdp ;askkh4+ iv+s wku75 ow 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 ozvwumb0 hd2z8zkg -7ran.b,4f 5.0 A is the magnitude of the magnetic field due to the wire equal ton.w- 7 zar bz,kmudgb8zv204h the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents ofq6vl y wcb7 v)ta;1rowt 0h.l- 10 A in opposite directions. They are separated b)6rvvythqlc1;bta- 7wwo 0l.y 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 carr7rarupgzs -6 k7apf2v pf2+/gy currents of 20 A and 5.0 A in opposite directions. The wg/6 7pg ak+srv 7zrf2papu-f2ires are separated 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 in opposite direct9yigmiis v4,u.( 2pkv ita.ku2z1c1 rions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the.p 4rm vkgt k,y uszui2 2ici1(ai1v.9 same?

  Four long parallel wires ea 92dpajq 5+vrtch carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of 2dqpar5+ 9tjv 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 5.0 A and 8.0 A in the opposite direkbi 6bnz38 z8wmt8gzgq3l ,ee: yy .*;* cwgzdction. The wires are sep3m3c.;8*y z88 b zw e*zwgqygdgki ,bt6 en:zlarated 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 wif vi.2cj t fe*h1j03kjre of radius 4.0 cm when af jjfi01e.v2*kthc3 j current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of w*dr0px4*t 2lxy j )dph -kvol6ire. What magnetic field is produced at the center o )2jr6xv*h-txyop* l4dkld p0 f the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 mtd dm+c(k0j bb0 a(f3x long and carries a current of 4.0 A. What strength of magnetic fiel(xm0f(ckdtd03 b+abj d will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generate a n(eo4 hpoabqmr8q: xb 4+ 81hv1.0-T magnebbn a4:+ 1q4 hvehop88o qrmx(tic field at the center?

  How many turns should a 10-cm long solenoid have if it vvxqqw 8jzqj p2lv7 +.j(p gswa( g32,is to generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic mome0ea lzoatj,9rlj8:/ zudy 5r9nt of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 t la o: 9z,0d ry5rz/u9ljje8acm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fie)tl i;n5fu8 rzld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop ifr u8n l)z5ti;s perpendicular to the magnetic field?

  A circular loop of wire of hft(gn0d .ot0 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 A is in a magnetic fiep)mp. p+vso:x ld of 3.5 T. The loop has anpv+msx.)o p: p 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 sqld150x tf0k jn1 00l s*y0tfck fkd+is in a uniform magnetic field of 0.30 T. The current in th5 kqtfk*0 00n k+y fjd1c0dss10 xllfte 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 z kp,rro4u3hi2 /2gjc7x9:tym mw2mc 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 torh,mk:tr3w4umr2ccg7oymxj p22/iz9 que when the plane of the loop is parallel to the magnetic field?

  A circular wire loop ob)ov mtk2y7vo i y bt-cv1j--.f 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, uvl*b79d+7cal ( +a ntpkv -kfa 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 ionnn rxf z(zq0;yrq:x0f4 xb 6z5 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 into a magneticn:t:z5 s)jgd32bx sts field of 0.040 T. What is the radius of the proton's result5txt23bdzs:j sg s )n:ing orbit?

  A proton is accelerated from rest through 500 V th9kk9x 3)ut,vrqe r4. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it xhr 4kvr3e9t,9utq ) kfollows.

  A beam of electrons is accelerated tto5v7qn3( umn 2pt-c dhrough 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 thet7m u n(do5c3tn 2q-vp E-field is required if the particles are to be undeflected?