If the north poles of two bar magnets are brought close to eaht evvupq7lqt2740n2 ch other, the magnets wi2n24t0e7lph vv tuq q7ll

  If the south pole of one bar magnet is brought near the north poluog+fx,:v8oe9 raa k5e of a second bar magnet, the ,k+ urof 8o:gava5e9x two magnets will

  If a bar magnet is divided +*vi: n4xwp xowpt99 ninto two equal pieces,

  The Earth's geographic North Pole is magkbjzeur4of /;5/v a7 hnetically a

  The south pole of a magnet points towya 3u4 2nev7sxf a8nb(i,r:stard the Earth's

  An electric current /g)iayzc* d+tzduh4c f ek61; produces

  Which of the following is c2g(h9gbx o3ij1 ltut -orrect?

  A vertical wire carries a current straight down. To the east of this wire, th, (lm wgyxs 6naz*v6etz5ta()e magnetica(*5g y, )am6v xtl6 nztsze(w field points

  A horizontal wire carries a current straigds5/fn:iyu,qz 2p w31rz vu-3am,t qkht toward you. From your point of view, the magnetic field caused by this ctv5irk 3,d q/nmpzw,suuyz-f 123: aq urrent

  A current carrying loop of wire lies flat on a table top. tyd . cb8s-b1tWhen viewed from above, the current moves aroubby8d tc1.st -nd the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop ofv cjx 7s7mw 23-(dllvbz61vny wire lies flat on a table top. When viewed from6n( 7y vw1l7s zm3lbvj2xv- dc above, the current moves around 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 4oay8,3qosfl 5 gg cv:field is the

  1 T is equivalent to4tk34ju3k ;:que9 wajzcf.sj

  The direction of the force on a curdw rl5o )z+t jkba;m60rent-carrying wire in a magnetic field is describe0+k)l ;atbdz65w r omjd by which of the following?

  The force on a current-cad- +354wjp 5yq lovwz 0dpiu(krrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equh v.c;t0s./vwa6nb(v 83cpom6mcl wmal to zero when

  A vertical wire carries a current straight up in a region where/.g*b nuig3j7t v+c ta the magnetic field vector points due north. What is the direction of the res/*vtga3tgbj+ u .c7niulting force on this current?

  A charged particle moves and experiences no magnetic force. From this9/-n;ad9y lq2kwhz3gvt te)j1j4rty we can conclude thay3l1/ n4 yz) qjrd-9t; t2jh9keatvgw t

  A charged particle moves with a constant speed through a region wh nhpj+h m-wn7v- c,hwky: 1+euere a uniform magnetic field is present:-1+-k,wp+c jhn7vm euh w hny. 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. r- ho/+e wccl2h+o;vwThe magnetic force on lo e2 r/chcv+;how-w+this particle

  A charged particle is injected into a uniform magnetic field such n v*vn/cs+ 8tzxj+z7ythat its velocity vector is pern*7 zsxtcv8 nz+y/+jvpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling i: x h3 rcdw.;ahf9iyj/ vye/zjs +s;+fn a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius+yj edsrxf+zh/w9c.a; /yihj : 3s;fv of the circular path would be

  A particle carrying a charge of +e trad(.gbk5 qj 7bnvels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path w7kbn bgq.j5d (ould have been

  At a particular instant, an electron m ndskeu))09ionahwe 0t71 c1doves eastward at speed V in a uniform magnetic field than)sed9)ei 7 w c1d0tuhn1 0koat is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed dioa0 6lh am1. f- 5amhps3ng7to curve upward as the result of aim pof6s- g 5.al0d7mn1 aahh3 magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a uniformt xqayfn( ey(6po.an-08 7nno magnetic field in the +y direction. What is the direction of the magnetic forq 70af( (tnyonnx 8y.o-ae6p nce on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carryiv( evx2y dyhg, xk+*p2iouu(* ng wire is

  At double the distance from a long current-carrying wire,z-dn rl-k4mc2.dd j 2n the strength of the magnetic field produced by that wire dec -m r4jlkd2n.d-n2zcdreases to

  Two long parallel wirexs7j0phi 8aa-s placed side-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 your point of view, the magnetic field at the point exactly midway between the twasa8px7- i hj0o wires

  Two long parallel wires placed side-by-side on a horizontal table carrpcu7l1a:h wswlk5) t.)in ff-y identica5l)-h ws:pf)anti.ukf1c wl 7 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 currents. The magni+jahft. 2ra1zr6 4;0shcy fsgtude of the force between the wires is F. The current in each wire is now doubled. zf0yjr;h+r146 ha g scf a.ts2What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves 4-vbus -v,csqo/r j0p toward the east alongsi-/ jbucq0 psvv s,4-orde 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 towar/bc3looiju 8*8cjz z4 d the bottom of the 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 thej3zb8lu8 4 /i ocz*jco page, from your right?

  Two long parallel wires are placed side-by-side on a horizor2b:+rk bucwfs1 )l3wntal table. If the wires carry current c)3s1 +2brw: w ulrkbfin the same direction,

  Two long parallel wires are placed side-by-side on a horizontal tcid8(un(v a (auh-.k fable. If the wires carry current in opposa -.unfdh v(8(aik cu(ite directions,

  Consider two current-carrying cib28b 6qmrwb hnj.f h(:rcular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. q 8bmbwbhf:. jrh(n62 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..s lcx/.qo2av 0 bcqnp8z7hy; Both are made from one strand of wire and both carry tns lhx yap8/q7cvq.o .0b;c2z he 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 th;l ; d 6uumi;ze-7lfs8wpgjw4e angle between the loop's magnetic moment and the magnetic fi s8;lmpzl j4 wge;;u w6-ifdu7eld vector is

  When placed askew in a magnetic field, a current carrying loop ;wjog0w z2tnf3gp;9pk p n0x5that is free to rotate in any direction will experience a torque unt925 xg; knzpnp0 03gpj;w ftowil its magnetic moment vector

  What fundamental factw;szn qv4 he4*r.ll1 lo:2sc l underlies the operation of essentially all electric motors*cq4 wlllr.4s1lh:o;nsez 2 v?

  A circular wire loop lies in a horizontal plane on a table and carries 2 et-)q ghih1rsjk(c(shi 2w;current in a counterclockwise direction when viewed from above. At this point, the Earth's magneti2 kj(h)igc1 r-wq(eh s;tih 2sc 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 is accelerated thro wnx nx-vop8jx-3.wb 3ugh a potential difference V and allowed to enter a mb3- pxo x-xj8.w3vnn wagnetic 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 ch 59ib zqt2l40x 9ta.pyf7mp3hhp*eykarged particle passing through crossed electric and magnetic fields. The forces exerted by th zyi02lk45f9a*. qthpb3xmypep t h97 ese 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 paralle nwoh5o,0i 8b7,kht opl to a uniform magneticw80ho7ibotpoh 5nk, , field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction e-l wgkj9up f6 -7b*l.q+v0mbrhag *oof $30^{\circ}$ 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 perwml0;.h.dc- jz( t-*hym i qng meter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an zyc*hwjh.i-; q m (0tml.gd n-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 ag7bwr a0v14/ejbl7 w sjr)s*z magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnwslab1 br j/we4z7js)* vg7 r0etic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnet6( u9ymx b(kzpic field of 0.20 T. What is the magnitude of the myb(k6xzpu( 9 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 a speed ouwv+if3um ,jrdd9 2,y wq8:ucf $5.0 \times 10^4 \; m/s$ 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 79l.etnkkm+ 9nf -ys b$5.0 \times 10^7 \; m/s$ 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 wec-n( 6 upq8riith 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 o)(p kfpg 43tjgf $8.0 \times 10^6 \; m/s$ 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 wioc b4rib*ldyi q6 0l7.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 acceleration of the electron.

  A proton has a speed of f,qxsc)o: b/9mcyv- h $3.0 \times 10^6 \; m/s$ 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. 36g,l-rvvyg*isl lp ce/ mh0ea(x c))What is the magnitude of the magnetic field at a distance of 0.15 l)lc(,-le3i hv0pe/gmags* vcr yx)6 m from the wire?

  A high power line carrying 1000 A generates what magnet 2:p k zib8-ez9divsy,ic field at the ground, 10 m awakzdi9z i-8 ,:syp2ebv y?

  How much current mustl sy0;1 yv6. don1o zt:i,nflo flow 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 carryf l93lvm*0 ,te5/jbek lr-tnding a current of 5.0 A is the magnitude of3rt9- 5vfnt jemldl*k0, b /el the magnetic 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 fant *d,(p 4z9ll.yfr 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 is 20 cm from one wire and 6p*d.nfa , frllytz(94 0 cm from the other?

  Two long parallel wires carry currents of 2n(jt+;h cas 9r0 A and 5.0 A in opposite directions. The wtrnhc( a sj;+9ires are separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry curc )c rmu9b* cjxv(k9wb*zwn3xd as1v*d201jtrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires k b99cbcw1*1*zxcwms(j2drtd* x3vj0au v) nare the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. i-f 5-3cs0 tq*talk5jpwv3 i nThey 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 magnetic field does one of the wires experience due to th-tn 0t qkpjli33i sf5c*5 vaw-e other wires?

  Two long parallel wires carry cua.t aakq+lvm5c4n,hev ln0w(vh / -k5rrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Fin 0+hv 5cll, /ev4k5( tmwa-naq.vnah kd the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular lon7 6fz*rp,t)g)ddamx2 q tcg1op of wire of radius 4.0 cm when a current of 2.0 A flows in tpm ngx1*2fqtagzc6d))t 7r,dhe wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnet+m/ ub) 1y pob4ew)idaic field is produced at the center of the solenoid when a current of 10u 1+a/b)i p)m bw4yeod A flows?

  A solenoid with 500 turns is 0.10 m loaw (a -aitt);nf s(*hmjb.,y sng and carries a current of 4.0 A. What strength of magnetic field w;iy,-.sw tbah) s*nm j(a (tfaill it have at its center?

  How much current mustvm61pu,0s: lgpet ma cjq+ -h- pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fi-v gsl 0m+,p-apeqc t1ju :mh6eld at the center?

  How many turns should a 10-cm long solenoid have if it is to ge3k+/mmllhg x u g();cmnerate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular looasn 2:acwcoqf.6vc4 8p of 120 turns that carries 6.0 A if its dimensions are 4.0 cnswc 2q6ovcca.f8 a4 :m x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifor ta/j4rrk nk)*m magnetic field of 0.30 T. The current in the looa4rtk)rnk/*j p is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectzffj9* h0nik v;1s b1iional 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 mahp)4t 9qmtqn7aoy.n 3gnetic field of 3.5 T. The loop has 3.nqh tm4oy7)tqp9na 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 wijmf( l*d9e 3upre of radius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. 9j(e3ul pf* md What is the magnetic 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 field ofidqo9d86-*wgb mpwu*)s/r dz 3cg s 6w 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the planedd 6s3iws /8ou6pm gww*g*-9dq) br zc of the loop is parallel to the magnetic field?

  A circular wire loop of are4/ g(jxafm;a 8.jnux ha 2+pvoa $0.25 \; m^{2}$ 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) has a speeah2f4 jt we)x2+)uk-v bie .lod 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 velocity r9fo1 sj:tcf4 hz/j+i $6.9 \times 10^6 \; m/s$ 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 injk * pefe;r4u3gktght1l130m to a magnetic field of 0.040 T. What is the radius of the proton's ;1pt3rg4fj1*emhel 03 g tukkresulting orbit?

  A proton is accelerated from rest through 500q4ja ih4s)siboo1w28:5i p h bs/ ozs/ V. It enters a magnetic field of 0.30 T oriented perpendicular to itsi4wb:h5s/s jo28aziio b/ )hsosq p4 1 direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated thus1d 7xhnyv gla2nlm-pst9+ e)g4; 4qrough a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0s s4pe;q 1)4h+nutv y 9-lma27gd nlxg.010 T, what value of the E-field is required if the particles are to be undeflected?