If the north poles of two bar magnetcxt( fuu p-c0prz;f :-s are brought close to each other, the magnets wx;- ufcf:pp(-0rt cu zill

  If the south pole of one bar magnet iy7uuzk r+v9 z+s brought near the north pole of a second b u7zyvu+9z+kr ar magnet, the two magnets will

  If a bar magnet is divided into rcp x*uh0bq( 9two equal pieces,

  The Earth's geographic North Pole is magneticallyp) +fowh hu tl;/i6 3jg0p.mmsv p76jo a

  The south pole of a magnet points toward tt m1a u3hv7c;n,7wwl xf) a3gwhe Earth's

  An electric current ez7* 4u)(yzxw e yl4dxproduces

  Which of the followir )0-f kn*,wnjeik7v lng is correct?

  A vertical wire carries a current straight down. Tkemw8,)bw 76vq,nn o ko the east of this wire, the magneti m6wq,, wonenb7k8)vkc field points

  A horizontal wire carries a current straight toward you. From your point ytdc)cfocet-602s c)*9 m cie of view, the magnetic field caused by this curr60 efyc*is)t- ec)cd9to m2ccent

  A current carrying loop of wire lies flat on a tab1rzi f/o2n4boy2 bt .qle 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 currenf 2o2q. o1zriynb4/ btt, outside the loop? The magnetic field

  A current carrying circular loop of wire vf7u-ljzdl.i bfqj34*5 /g pl lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise 7pbl3u./ f*gv 5j4 dljq-filz sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fix tfxd+4ps -(2cmhlam5 vb)qz0 +(dxj eld is the

  1 T is equivalent to35., )kjh lr* ez4zcgzb;a csx

  The direction of the force on a current-carrying wirehehae favi(n.m4, 0)z--xwchv-f3 rl in a magnetic field is described by which of the fol,hf f). nchev-wez(40a-3 ihlrmxav - lowing?

  The force on a current-carrying wire in a magnetic field isks-h6f i ce;ccya7ac6t:2 e4z the strongest when

  The force on a current-carrying wire in a magnetkrc,r-f5:e) pv0pu d zic field is equal to zero when

  A vertical wire carries a cuhsq+m7tuy xsi+; (b1trrent straight up in a region where the magnetic field vector points due north. What is the d17;sb+tsti+u x y(qh mirection of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can d7bscu :l.rb( cor.l7bsu c:(d bnclude that

  A charged particle moves with a constamn00flifnq7 ,-z+cf,s+/azeig p5hztl 4r a/ nt speed through a region where a uniform magnetic field isz /,0l+0i+7ptcrea g4/ a n fzlqs,-fz5i mfhn present. 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 magnetic force fc:;agp0 nkj9on this particlj0:9ganc; kpf e

  A charged particle is injected into a uniform magnetic field such tlj)9 n 3ezuzx2hat its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the3exj9z2nl )z u particle will

  A charged particle is obsdqq 8,y:k) z7gac4bl1 vq6 cdw:wf-fg erved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of7 a -lcq1d4f,g gzwcv: 6fyqq8dk: )wb the circular path would be

  A particle carrying a charge of +e travels in a circular pat1/ lacs+tfnqzc tbzg :6d w+1:h in a uniform magnetic field. If instead b lf1tn+a/sgq 1cztwz:6d:c +the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron movy *ltqrmvwy gp uh3+m*mt*;8) es eastward at speed V in a uniform magnetic field that is directe8ymt3q)m *y;pmwhg+ *v u*tlrd straight downward. The magnetic force that acts on it is

  An electron has an initiav c5 ,,j uim:s6a9i- n4ykvvwsl velocity to the south but is observed to curve upward as the result of a magnetic field. The direction of t,incy s a5:4m-iujwkv,96 vvs he magnetic field is

  An electron moving along the +x axis enters a region where there is a uniform dc ;n (ptz/c4xemqs/. magnetic field in 4;q .xcc e n(mdzt//psthe +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 lpj.ti snx44b) i 2)2cryvxe3y ong straight current-carrying wire is

  At double the distance fr,p/1jyzl g6dm3.z: iwvicr4xom a long current-carrying wire, the strength of the magnetic field producediz4wzx pdimj1g .yl ,6/v:3cr by that wire decreases to

  Two long parallel wires placed side-by-side or5s0y::xrsz +wd9x 4z3gxqz qn 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 your point xxr: 4wq:9y rdsx5sgz+zzq3 0of view, the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side o sm 8f,:kp0feon a horizontal table carry identical current straight toward you. From s kpfe:8, mf0oyour point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry ph/4 (s:g-dt0nj +e5je /nprvzv7n yq equal 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 vvn 4 0/rtpdy5 jz(nhs-jegpeq7/+ :nnew force between the two wires?

  A long straight wire carries i poa3ielw3uf g-/6 m+current toward the east. A proton moves toward the east alongside and just south of the wire. What is 3w 3eg6a-iu/moi lp+f the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bo4gum2:e:zo 5bq dz+rldmtwh x +f,+d9ttom of the page. What is the direction of the magnetic force it produces on an electron that is mov+,:hb x+r 9 d 4wmz5mel:2g+tzdfoqdu ing perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-sidindyy 1e xn-) vo;6.bve on a horizontal table. If the wires carry current in the same direct.1v yv ;-)yxenibdon6ion,

  Two long parallel wires are placed side-by-side on a horizf s3hn dtgyji-( 3y*,uontal table. If the wires carry current in opposite directio3tsd i, f h(gy-ny3ju*ns,

  Consider two current-cargumc,a41wl(t rying circular loops. 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 field at the cente1ul 4t(m,awg cr of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are mad2e- 98 a2y1qzfsvnsg r3in4c ee 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 momenr41 9yvqzgaf 2ceen2-3sis 8 nt of the larger loop is

  The maximum torque on a curren wp(cb. *bmyi9t carrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vec(y9ib*cwmp .btor is

  When placed askew in a magnetic fimw.pz23/ygzena u 7c 5eld, a current carrying loop that is free to rotate in any direction will experizu/ n g5wa2mezpc .y73ence a torque until its magnetic moment vector

  What fundamental fact underlies the operatyqw(qsmbt-mov4/8s 8 ion of essentially all electric motorsotyqm-4(vq/b 88mssw ?

  A circular wire loop lies in a horizontal plane ong/ch3 nc2us w; 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. Which side of the coil tends to lift off of the table because of the torque caused by the currents inter2c/gc ws;h3nuaction with the magnetic field?

  In a mass spectrometer a particle of y:kfb s*bsm4aa+ zj96 mass m and charge 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 unifoa6zb+m4 js ab9syk: f*rm 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 cros,r2f5t+0 gc ueksg8 r;ycs-hrsed 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 direction should the e+5ch,s ;-gf2r g8c rrkusy0telectric field point?

  A 2.0-m wire carrying a current of 0.60 A-isx jy l46:+ r-oyzzm is oriented parallel to a uniform magnetics:-lx -jyzo4zm r6yi + field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a cur./si * xx*exiqrent 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 s 48y0( uxmqhpatraight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 Tuqha4(8mp yx0? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m lonv trv.ts w4(,d r:xaf/g has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order r v/,4 vtx:sdw( tfar.for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic fksp 5 zen6p5-bield of 0.20 T. What is the magnitude of the magnetic force o655-ebpzs n pkn 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 withh30rho)xxld:1 k4wm m 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 opsveaj: :5 pm x1;ea*yf $5.0 \times 10^7 \; m/s$ 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(i rdl1alks(ggjx8163mv6 ch 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 spee+zbu ws 4ge,m1d 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 j7kcw5,vud6 s(pwl h)rpw 7-c 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 :c bdw.ii4fs+ $3.0 \times 10^6 \; m/s$ 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 -j,w z2s)umt. mo.aojthe magnitude of the magnetic field at a distan.)wm 2zsj ,ot.a-uoj mce of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field 8diu7/t9ln5b r*qyfj at the ground, 10 m awaf9 lqn78d5rytj *ub i/y?

  How much current must flow fozu*17b1kphad r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long strf6gf. y. :mf1 wgg u* dkfru.ro u9op/p*p2o;gaight wire carrying a current of 5.0 A is the magnitude of the mpo.mpw. kfgg d g:fg*p *uu/fr.2 oru6;1f oy9agnetic 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 wires carry currents of 10 A in opposite directions. 2j.gjj 9h7czj They 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 and 60 cm fromj. z2g97hjj cj the other?

  Two long parallel wires carz5tpvciy+dj h z; q;08ry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What ;i0hjt v zc8yd ;5pzq+is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A auksy*q/ bg 68in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the 6gks bauy/8*qtwo wires the same?

  Four long parallel wires each sh79q24ra ok;- gbwge 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 side 4.0 cm positioned in the x-y plane. What magneticho -4ase9wqr2; gb 7kg 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 oc6m/j 50k;z b,trujiq4a* mzt pposite direction. The wizi 0*5qb,u/zmjct4jmat;6k rres are separated 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 o18s k xv;emxl3f radius 4.0 cm mvesx8; 1lkx3when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetizztgl4 2m df2n,w j2(qc field is produced at the center of the solenoid when a current of 4zjwf 2g2t2n m,qzd( l10 A flows?

  A solenoid with 500 turns is1zsl ix6:dnv2 0.10 m long and carries a current of 4.0 A. What strength of magnetic field wil:6dz 2insvx1 ll it have at its center?

  How much current must pass through a 400 turn coi 7th,de z ueuk)zpz:7m-xed a(9c+c,wkd y8r9l 4.0 cm long to generate a 1.0-T magnece zdyak (ddcmu)e9k,h p 8z9+7rwt7,z-x:eutic field at the center?

  How many turns should a 10-cm long solenoi0 t 4dwt mt 9y+j*+ie1pjqgwt/d 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 kh b 1trbx: mdz+6l:j) (ycb,vcarries 6.0 A if its dimensions are 4.0 cm x :kdxjbrc6ty1:lh,z v) b(m+b 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifc,1y 68l db58-rdkkxr vcegjf56,derorm 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 per-k8r,cr86dx ec, 5devj156f ydrkb lgpendicular to the magnetic field?

  A circular loop of wire of cross-secti byszwp;8wnho-n 5d( .onal 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 qgirto, 20lw9em- j /gcurrent of 2.0 A is in a magnetic field of 3.5 T. Thee-g9w/ijglo, 2qtm0r loop has 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 0.30 qmg/h4bll. otjij .*w*8 ksr ;T. The current in the loop is 2.0 A. What is the magnetic torque when thewbl 8 r*m4klos *jjh../t;qg i 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 field opb4xmkf ku a 5e0z8d)0f 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when thu05f4 0zak8)kxdemb pe plane of the loop is parallel to the magnetic field?

  A circular wire loop y-t,bq4or8tqof 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 (charge e(n)gho(akkc a:n*: 4k0 bhr aa) 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 (di rff s-st se25qvy3yh.k7-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 potm0,es 0 rak h+9h tv(bd4 su,lxf,rp7dential of 1.0 kV and then moves into a magnetic fie,ms ,xf0,90vsrpa e(thh 4 kdldub+r 7ld 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 field of 2pdd*ie5- jn w0.30 T oriented perpendiculanddi-2w5* jp er to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV h8 (-uajp t,-qgk5n pnbefore entering a velocity selector. If the B-field of the velocity selector has a v-jt8 n-kp n qp(5uga,halue of 0.010 T, what value of the E-field is required if the particles are to be undeflected?