If the north poles of two bar magnets are brought close to each other, the maggh+37 nl gmwu5nets+hwggm7nl35u will

  If the south pole of one bar magnet is brou: ufzd-0arb 5mght near the north pole of a second bar magnet,5ua z :m-bf0dr the two magnets will

  If a bar magnet is divqu ,o nd/p lk a6(jyvw8ov*5,pided into two equal pieces,

  The Earth's geograph(tqbar7mp +5pic North Pole is magnetically a

  The south pole of a magnet pofvbx 32;znj(g ; jwxm(ints toward the Earth's

  An electric current jv(7y jz,*agy xn 6az-produces

  Which of the following is correckt v(ap6fw 87543n ydgv 2wlzat?

  A vertical wire carries a current straiorrn+zai( 5,qght down. To the east of this wire, the magnetic field z+n5ao,r rq(ipoints

  A horizontal wire carries a current straight toward you. From your pointptp;sg c ,7faec :;tp; of view, the magnetic field caused by this curt;p sg:cp;,c7ef;a tprent

  A current carrying loop of wire l:2adkdgddp fwk (c7mk0r9 94 nies 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 th ad742rw0( k99 gddmcnk:pfkd is current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat oswlj 91mi y0iv d 7zad9i,20son a table top. When viewed from above9iyz 09ams,s o wljd2v1iid0 7, 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 magnetiuz a1-cu5mqsb5s1ij 2c field is the

  1 T is equivalent toj3f/zaj f :m1y

  The direction of the force on a current-carrying wire in a magnetict.oixom98era14 tc g(vj0 ,.qklrv 3 v field is described by rv4xqt ot1m 3roj8.0(e a,vvkgc9i.lwhich of the following?

  The force on a current-carrying wire in a magnetic field is t/zz 5ljbflc-dp8d ow;y/d. br24 4z qghe strongest when

  The force on a current-carrying wire in a magn 6ci gtge8n9p(etic field is equal to zero when

  A vertical wire carries a current straight up in a region where threzvb9r u/5 ,t ovrewzfr 22c443kxv)e magnetic field ve9 r/4z 5rbvwecx) r 2,ev vfzur4o3k2tctor points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetial vx;;ogde7m. y+1hyc force. From this we can concav eo1 d;g+hyxly.m;7 lude that

  A charged particle moves with a constant speed through a region wuy 52j: hv5 jq bz2j35mdyciu7here a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic forc722hujy i j 5m5cubdzvy:jq 53e acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic 8n7(q9ljbuij force on this pun j(7jil8q 9barticle

  A charged particle is injectl6)t/3b zljbm 4za4 xved into a uniform magnetic field such that its velocity46xj b3bz tzma4l /)lv vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed travelxdrbthcg *n sa2gr4y *9 (1ci9ing in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular patha9g2c 9rdshcrgybn i4**(t1x would be

  A particle carrying a charge of +e travels in 1ju,j6l-k+ clc:g a99w jrrzba circular path in a uniform magnetic field. If instead the particle carried a chzuw j:g rka,9bjjc+-r1 c9ll 6arge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V inak((bgdf rk:4 a uniform magnetic fiea bk4dfk(rg( :ld that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but i dk,i8 na6v55kf 5d49pivva xjs observed to curve upward as 4vv 5i i5j,f5pankd dx9ka68v the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there iptvbt; ,xlnh 4 54gdl0s a uniform magnetic field in the +y direction. What is the direction oh4pdng;b l0,t5t4 xv lf 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 currentsi/ z/p+u yyr9-carrying wire is

  At double the distance from a long cu.k2, 75 o8sn hktdbvarrrent-carrying wire, the strength of the magneticosn8 2 khv5,7t.arbkd field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal t dps-7 k*bffp8cpi c4(able 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 -pdib(cc7 fpp* f 8sk4at the point exactly midway between the two wires

  Two long parallel wirw6refr 1 xuqqa76 3a6xes placed side-by-side on a horizontal table carry identical current strax eaqq 66rua x67w3fr1ight 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 magnitude of the e* gi i,)uy ry6osbk69force between the wires is F. The current in each wire is now doubled. What is the magnitude ,ykbr)6s *iugo iy69e of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towa7l q es./,yrcit2e*ls87rai drd the east alongside and just south of the wire. What is the direction of the force on the prot 7e* ,irerl/.yqtcd8i27ls saon?

  A wire lying in the plane of the page carries a / )wxk1 min*p*gpm a/z r)wff:current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is mopxm:w*n)w/ *k/ zragi)fm1p f ving 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 the wvs78 7dlls f +5lcykmndoc4:(ires carry current insl d(lc k:o 5+m7n f8vd47lcsy the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the o,ofsm acfy27md4j7l c27 i34ge ;ngs wires carry current in opg;7l7 2 cojid4s ,2 fsmcoay37e gnfm4posite directions,

  Consider two current-carrying circular lo0lem8g 1 ye ksi5nc47xops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of 5kls 10cgi ne48xyem7the 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 onk ( 14+aggkef.xa5pkba i lg/1e strand of wire and both carry the same current, but one has twic(kx aeggk/lkfb.41iapag 5+ 1e 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 occursab6 7 ysat0vi( when the angle between the loop's magnetic moment and the magnetsby(6aat v70 iic field vector is

  When placed askew in a magnetic fj 9v.ay5 fks 5s8fxo+z n4wn6aield, a current carrying loop that is free to rotate in any direction will experience a torqusxso n8fnv9f+5.a w4 5j ya6kze until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all :lz6lrr+inru; r l5ot n:y- i9electric motors?+r:zrynonr; l 9- ill5 turi:6

  A circular wire loop lies in a horizontal3)x3zxvpe wb-5 (irh0je;y dc 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 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 currx0ji )x d3be-5(yw;c hve3z prents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q i00vd01bj 5hp 4xdpsk89 gcq gus 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 uniform and oriented perpendicular to the velocity of the particle. k80 d0pg s5ubgq1chpd 9j04vxDerive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector co+f*kwnh vj uwwoj4p 12h;vl8 o0k4;6 3ejuiwe nsists of a charged particle passing through crossed 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 velocweo pflv en48 ; v6j0wiu3k+w h*w jj1u4h;2okity 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 yds,.3redj.f0c;af,c v88fpx cj zn- a current of 0.60 A is oriented parallel to a uniform magnetic f. ;c3a8zp,d0y8 je,cj.f-fsdrxcvn f ield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A insmc 3 l;z9h.ydxf 1m.47 pfszlfp)5b4:cimpx 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) zh/pyiu- 09zfwudf + a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes ah9wupi - yd /fuz0)fz+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 a magj n;ugfwn:i-b;p7t m3netic field of 0.10 T. What minimum current in the rom 7ub: nnt3;pjfiw ;-gd is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is inhq m:ij71rlxq0 kbl0-m1h ps: tcj3+ s a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic forcp-hxs:h3 7jqmc t: 0ql1sm1rk0jl b+ie 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 with3 s a;v669k v4i:qc:njhuv qgxxc j6n4 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 31y(a+rwcmk, yaphqiq7qq l0 ,) kl 8ya 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 dur6iz3uzlda;mf ri3evm jz s1(m,1e:3 e north 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 wit dp 71k4l68oicq 2 xn10ynnscfh 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 d.bhnzt 5e.n.:zwx+aa 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 oiid pe73 ud:h. f.:kvcf $3.0 \times 10^6 \; m/s$ 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 straighth0rq 7m-+e dbr wire carries a current of 25 A. What is the magnitude of the magnetic hb-+ ermq7r 0dfield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates vmfb(0 ieel w:*t 2-dewhat magnetic field at the ground, 10 m adw eevb0i(ft -l2em: *way?

  How much current must flow for n 49/dwbjm-(zfafj-a$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 4 b4(45ndtl f+ /bpqidsxvt5zvm6(rn A is the magnitude of the magnetic field due to the w44s(tlvrvnd+i6tdb 5z 5pm(x /n4fbq ire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currenmkcz5 84khc( h 8uzv-yts of 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 tmy8c48h5kz h -uvzk c(hat is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents tzdjlgvxyx7d g3ata j(68,;k9 k it78of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between theaaj 7vki,8 8tx dtx 9g zdtj3k7lyg6(; two wires?

  Two long parallel wire9z 1 sda/pru3:s*hkmitf* s;v)g 7d rys carry currents 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 are the contributions from the two wires thd dir 7sk *m1/sg;)uf tzv3pysar: *9he same?

  Four long parallel wires eachpnpp:, bm8j 3l 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 magnetic f3blp8p, m:pnj ield does one of the wires experience due to the other wires?

  Two long parallel wires cxp7toa8 w;oc r p,de4mp;aqb.;h9 4 mcarry currents of 5.0 A and 8.0 A in the opposite direction. The wires arepqbm7at8r ;9 modpo c .eh44cxawp;;, separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at thedn v,0ix6qv5i:t f rz) center of a circular loop of wire of radius 4.0 cm when qxf :0id5rti)6n zv,v a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is woun9k,469vk;d f;qzna tv uaig7jd with 5000 turns of wire. What magnetic field is produced9 j 9ku4aq,6gikv a7fvz;d t;n at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m)q9 jq vtb/a30tz sdh0 long and carries a current of 4.0 A. What strength of magnetic field will is)t aj0b/3vh zdq9t q0t have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to g1qer y8tg) cztbq(34menerate a 1.0-T magnetic field at the center?q1q8t4 m rg)etcbz (y3

  How many turns should a 10-cm long solenoid have if it is to generatwjlbbm: 8r -1te 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 carries 6z4 9qm6wg8a; mxk5lnmtsr 5 (a.0 A if its dimensions are 4.0 cm x6 4wgr lzmmxqsa8k59 mnat(;5 8.0 cm?

  A circular loop of wire of radius 0.5ve)f f5 czu,z0dt(k cq;7u6bg0 m is in a uniform magnetic field of 0.30 T. The current in k;dg07f5z, qc fe ) tbuc6(vzuthe loop 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-sectional area jj1airfa) :2 h$0.12 \; m^{2}$ 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 curregx*x6 vkkke79 nt of 2.0 A is in a magnetic field of 3.5 T. The loop has ank9*kxke 6 xgv7 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 mq; 87mxqe.p+ )kp3cdep ogky+agnetic field of 0.30 T. The current in the loop is 2.0 A. Wha k cpo8kgxeq e)+;.m73yqp+pdt is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radiu(,zhfkrpq3 ,vo/ n1clu 9z2a gs 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 loop9c,qg hlznpakv1f 2(/3 ,zoru is parallel to the magnetic field?

  A circular wire loop of - kbtg;6qsnp8area $0.25 \; m^{2}$ 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 spectromet )u.l y3m3kgrler, a 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 ion with velocitz cplik ry(ij8t9 -a5o)nor,;tw j4 1wy $6.9 \times 10^6 \; m/s$ 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.gnk 6df yu;-x (ae,nt+0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the protk ,x yf6(gnn;aeu dt+-on's resulting orbit?

  A proton is accelerated fromfphz f)qcr3,l3 7 v)tsfqz:e; rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular toz7 )vphz:,f)ecqt3rf;3q s l f its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated btz7esa n +k2a+m-g.;c o j*rdthrough a potential difference of 10 kV before entering a velocir t;2ne.+zg7+* cab dkjm-aosty selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?