If the north poles of two bar magnets are brought close to each :i 0c.8((eyf lbqvrd2 gebk *dother, the magnets e*er08g( idcy bbl(2:. dkqf vwill

  If the south pole of one bar magnethpc, iujqd yv:vy9 4/- is brought near the north pole of a second bar magnet : 4y p-,qh9vyvcij/ud, the two magnets will

  If a bar magnet is divided into two eqv k ao1t4i5l2dqy*bs 7ual pieces,

  The Earth's geographic North Pole 3q;s)j,+aq5xu/x vem0sp ie cis magnetically a

  The south pole of a magnet points towardxn ,a;uk(i1 l,q pox* x4fz1jn+6xgoeenc9;v the Earth's

  An electric current produceceqiby 2m xu+-7/,oue s

  Which of the following imc ki jdu(-db nn z1x1ng* n65:8*hlues correct?

  A vertical wire carries a currmlzb(t*4p-ejdikr ) 74)vr x uent straight down. To the east of this wire, the magnetic field pointsudj7(t4 lxkrrv-* e )) pib4mz

  A horizontal wire carries a current straight towardsvvl hmb 8,rs80na 8ve23ol. v you. From your point of view, the magnetic field caused by thiss8la,8bolve. ms30 vh vnr2v8 current

  A current carrying loop of wire lies flat on a table top. When viewed fbpqy t d/.n1)yngj3d: rom above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outsigt :ynp.y1n 3j /)dbdqde the loop? The magnetic field

  A current carrying circular loo ppm)t4c:7pzip of wire lies 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 this current, inside the lcpippm4tz: )7 oop? The magnetic field

  The SI unit of magnetic field i a(mnoldm4z; (). *l,g ddxebis the

  1 T is equivalent to- pdq rl d/comww8.q,v tn1.x0

  The direction of the force on a current-carrying wire in a magnetiscqx;bw zk0i0o*; ,5y r(d gbtc field is described by which of the following* 0 gsx(05rdbt; iyocwb,z;qk?

  The force on a current-carrying wire in a magnetic field is the sta+( x)zuja;d 8ztnly+ rongest when

  The force on a current-carrying wire in a magnetic field nc26(x,ve5z gys0 hopm d3pe.is equal to zero when

  A vertical wire carries a current straight up in a region where the m0k :d*53 x c(zhvw2gdcp,zjd fagnetic field vector points due north. What is the direction of the resulting force on dz: zcgdx*5 hvj2w(p fd,0k3c this current?

  A charged particle moves and experiences no magnetic force. From thi)+*9qlail9sawn87q sd 2jz kr s we can concaz9w)+7n9is*a ql lq 2kd8rjslude that

  A charged particle moves with a constant spe q- anx 0pqysq /itzt8e025*bred through a region where a uniform magnetic fieldr/ 0z5ip2*y0 qta q nb-8stxeq is 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 magg4yb9a2is n .fnetic force on iygs2 a 49fn.bthis particle

  A charged particle is injected into a uniform mag eotjn6auui +;)k /y(tnetic field such that its velocity vector is perane(iu o ;+ktt6y)j u/pendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is o8-j,ps(;0as cbu ii ut0fcdp5bserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice asp5 sabjud0 i (pfits,u0;8cc- fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path i4 s8v.grvcfggwh 8/3l :hp iq1n a uniform magnetic field. If fvp i /h4 g:whv8 g1.3l8sqgrcinstead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniforxhscv6kbd zo* s ,**w( ,d)eqp mc; *bbzax7v2m magnetic field that is direx2;dqp*bcvb,cm, *ze s(dvks)z7 hb a6*wox*cted straight downward. The magnetic force that acts on it is

  An electron has an initial3//q8/cguhc 0ou uq. asrx(ve velocity to the south but is observed to curve upward as the result of a magnetic field. The directior3/hcx8/(cvq o.quua sg/0 eun of the magnetic field is

  An electron moving along (.kox,uw 9 3fxty v*ynocm7r ;the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, m;tor .n oyx,c xw7vy9kf3u(* +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-c uv*j* z)r5ucn-jxt:oo .ghowt :g7s l0g+ /rlarrying wire is

  At double the distance from a long current-carrying wire, the strength of the 9wgd h i5bcl:divg1-8 magnetiv-5 hi8bdd9gl :c wig1c field produced by that wire decreases to

  Two long parallel wires placed rlaf 9 h dulk6x7qw :4hhq487mside-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 two wi:6 q9hl8rx4w7muh lh a k4fd7qres

  Two long parallel wires placed side-by-sidhda*7fc :n8nfr 8yp) se on a horizontal table carry identical current straight tpca d7 8:s8*y fnhfnr)oward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The6 yh8t+wt2-y1ye w xfy magnitude of the force between the wires is F. The current in each wir+ ywet 1fyy x2t68ywh-e is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current tow52o/8tvo1sw fs bw/30dcg dacard the east. A proton moves toward the east alongside and just south of the wire. What is the direction of thf 5c c/1802v awsod3wtgs do/be force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of t;h,z hav3z t8a kwen, y:vk8)dhe page. What is the direction of the magnet ) ,yh,8: ;avk3k zzewdnva8thic 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 therkwaiz e3b/ :4 wires carry current in the same direr/:eazk43wb iction,

  Two long parallel wires are placed side-by-side on a horizontal table.:1 kpb:k+i pr qpbz6:z If the wires carry current in opposite di 1 bqppbz kr6::+ip:kzrections,

  Consider two current-carrying circular loops.g3d t9/ mprmfjp83xwq7- ysy6 Both are made from one strand of wire and both carry the same current, but one has 3r 8-x63ypsw f97/pgjy mq dtmtwice 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 cirxk(:k v8 y twucb mv;1-yz0w(hcular 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 moment of the smaller loop, the magnetic moment of the larw:k;(txy hk wzbmyu- 1v 80c(vger loop is

  The maximum torque on a current carrying loop occurr + j+rim61 drsm/1lzds when the angle between the loop's magnetic moment and the magnetic field vect+dmi/ j rm6sr1dzlr+ 1or is

  When placed askew in a magki7r g v3hx+3m-xn,ik netic field, a current carrying loop that is free to rotate in any direction will experii,x-mx37vih +kn 3krgence a torque until its magnetic moment vector

  What fundamental fact underlies the operation of x6jr2-) gl+fszx izaho0/(jv/ w:cbm essentially all electric motors? glzs-)b x x/(:zjoma6icrjv0/h+2 fw

  A circular wire loop lies in a horizo2i3 mrb 0rum7+h9jablntal plane on a table and carries current in a counterclockwisr ab0bjmh m79ul3+i r2e 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 interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accelerao;zo ri/ f+im e7)z(xlted through a potential differeizmr o;)i + /olze7x(fnce 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. 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 passingwrnx 1zpzkrlfmc-t b (do) 17r3(.jq* 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 velocity selector, the particles move toward the east, and the magnetic field is directed to thed)r 1kbmfoc*nj7( 1 w-zzq(p.t3rxrl north. What direction should the electric field point?

  A 2.0-m wire carrying a jnqs mb pf70*7io;rk680vkb h current of 0.60 A is oriented parallel to a uniform magnek6*qhbrv 7fp 0 njks08imb;7otic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in atne pp9gml ) xs(6+nr,xt y/.s 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 straight wire carrying 5.0 A when it is pl5z r97tta+a-onzwq o:+ dbjo;aced in a magnetic field of 0.020 T? The wire makes an andjw zna+b7o o qoazr; 5-:tt9+gle 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 maj g) lczh:xe*2gnetic field of 0.10 Tzgle*:j 2xch ). What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magdk* g.hi8z pz9m,fta mkkcl 31an9o*(ip7s 6rnetic field of 0.20 T. What is the magnitude of the magnetic force on the protonakp8 kl zm*nrm*(h it f,s79 p c3o9zai1dk6g.?

  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 a1ig9m h +kkn:r 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 .xww /sjhppw*zonfeej2*6 ( , 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 duw7 7ujsei*c g,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 with a speedbs36*wjzmh* inzr x9 gu7m)d4 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 3bhtlv b vxncr7t(58a2sun, : $8.0 \times 10^6 \; m/s$ 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 y05holxad 0gf0r 4y m1$3.0 \times 10^6 \; m/s$ 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 ojs2tq o 0di(7t1y84*iwyc pbcarries a current of 25 A. What is the magnitude of th q40jy8 *7s 1iwtdoy tcp2o(ibe magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000mlbr,(( iqu c/gug2rzk14,ck sso0(ckx -/ d u A generates what magnetic field at the ground, 10 m az (c /4gqsuucirbxo 2u,l- k0m/scg(r1k( ,kdway?

  How much current must flow for ql3mb l3vlwmq0 u e2+ne,:+vq$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straiaiffrcy6njv iy bs*0na5/ s00we5a8 :ght wire carrying a current of 5.0 A is the magnituv sf:/0 brany6sa n5i5e8j 0*0yawfcide of 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 10 A in nk7uof/a h4l7opposite directions. They are separated by 40 cm. What is the magnetic fie 7o74lfu/nahk ld 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 carry currents of 20 dx3svy/ .xxl)A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betwe xsy)d.lxvx3/en the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppos)1h5 waip; zx((ynsw+x/vy/sqvf x* oite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the samy hsf wz+*(/xy(p/wo xq i;v5svna)1xe?

  Four long parallel wz j ixxodc740/ires each 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 field does one of the wires experience due to the othecd /j47oxz0xir wires?

  Two long parallel wires carry currents obw 2*m2uf e23ema l1vzf 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magneticamzf2l21vwu b m 3*e2e force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire oqnrs4y49c6.- gioodv f radius 4.0 cm when a current of v46r-qdi9goy cns 4o .2.0 A flows in the wire?

  A solenoid 20 cm long is wound wiesn+c(m ig(,w4r6l 6aug.gn9 , 8gj ldf tj-qdth 5000 turns of wire. What magnetic field is produced at the c,gfd(-g ud + (n86q6j i4atmgrwc9g sj, enl.lenter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m longs yis bc5lf+u f0j4tt t8oy*65 and carries a current of 4.0 A. What strength of magnetic fiestlc4 * j 0yfsou6if8ty+t 5b5ld will it have at its center?

  How much current mus tv+a:. h2z:kr djuuj -i10xhv,rg1fdt pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field a 2z uu.djthva1i+h-j: gv r,10d xkf:rt the center?

  How many turns should a 10-cm lo.-cs 85wfv.zil1( 6s wh nphrtng solenoid 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 r6oaok2j j,1 jthat carries 6.0 A if its dimensionsaj jj126,ko or 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 0.3 r,mdq3,r5cu06ah cftsnk-h40 T. The current in the loop is 2.0 A. What is the magnetic torqh, a sdn-tkrcq0uf4h3r6 ,c5mue when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wcn;txmrk)a5uf *x ,0zq1e,f xci s5/ bire of 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 oil .ry:a y01kec0ed mtg/5 3hqf 2.0 A is in a magnetic field of 3.5 T. The loop has an area ql1t:y.e5g3 dyrim /ha 0e 0kcof $0.12 \; m^{2}$ 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 magneticaxo4. 3j x .br+(ytarr field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loo jo+xrr(ab.4t.3a xr yp is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnet w4afu3 rhm ; 6.1p1 ek*;ipr3qzurynf0s:buc ic field of 0.30 T. The current inr1ac;zbu. n1:shwue pqr*; yk r3ff0 6pi4m3u the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of are*c f9: n0h(r1b kikn8wewwt9ba $0.25 \; m^{2}$ 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 se7 5dl al,gketk nb*(5ingle-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 0;4qefrqo q/f 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 magnetic fqk o pju;0ld86x 3uy9qield of 0.040 T. What is the radius of the p0u3xy6 p 8;klu9o jqdqroton's resulting orbit?

  A proton is accelerated from rest through 500 V. I3up1 k8han 08gad6:au*uwys3 i*iofht enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine theap8 uya6* gdao8 k:0u13ni fuwh3*ihs radius of the path it follows.

  A beam of electrons is accelerated throu n2c yyx)et.w-gh 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 w xenyc- .2t)ythe E-field is required if the particles are to be undeflected?