If the north poles of two bar magnep 9t5 rv60u9kws3ybdq ts are brought close to each other, the magnets wil bs pq 5vwrtd3y0k6u99l

  If the south pole of one bar magnet is brought near the nob f6z:t(k-uye rth pole of a second bar magnet, the two magny- :zu(bft6ke ets will

  If a bar magnet is divided intoalkyu :gzis:of1 2 k:t4 9up2k two equal pieces,

  The Earth's geographic North Pole is magnetically sdrifs+8p74 zbh(gr.,rj +g ja

  The south pole of a magnet s.t gvgj0 h02n k ,l+j5zchf+bpoints toward the Earth's

  An electric current prod g edit+r2hk h,-n3/sauces

  Which of the followingjv;l yrtarlu3t ,-oe/;- 2 qtk is correct?

  A vertical wire carries a current straight dzr c4tfwxd yuk hqm7*n;3c506 own. To the east of this wire, the magnetic field tn u 6;c7f3hw4xq yk0crdz5*mpoints

  A horizontal wire carries a current s gullc4 969-e1n,2obqzftja kkf9e,l traight toward you. From your point of view, the6 ak k91,zfl9,ljq gee-4buf2 c9tn lo magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. W0 rao /,uf25e9v hudvphen viewed from above, the current moves around the loop in a coun9udor5v2af/0ph ev, u terclockwise 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. When vicbcrwc hkp.ej3 p.g xdx buqu5n;-437st:,e0ewed from above, the current moves around the loop in a counterclockwise sense. What is the directioqjpe,t3s g ubx0.ed7h 3:.b cpcx k 45-ucwrn;n of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is th+g xi )y ko2eqs7sg7f;e

  1 T is equivalent tod- 32 t)dz (xo-apo5t qpy5osp

  The direction of the force on a current-carrying wire in a magnetic field is de0e metww7 *o-o6 2bgumscribed by which of th2mo w o7ebw u0*tmg6e-e following?

  The force on a current-carrying wire in a magnetic field is the s- noslx* 2xh)j m1zik9 ah8t9vtrongest when

  The force on a current-carrying wire in a magnetic field is equal to zero ;a)xp d*x0:fvilexg, when

  A vertical wire carries a current straigh9ji o4zxian7 r-t00ybt up in a region where the magnetic field vector points due north. What is the direction of the resultinij-rb0tz a 7yo90in4xg force on this current?

  A charged particle moves and experiences nuay:nj j m.**g ttu+f6o magnetic force. From this we can conclude th.+ntuyg 6**:jmu ajtf at

  A charged particle moves with a constant speed through a regis 5ko5la8a*p6 c5 mkafon where a uniform magnetic field is present. If the magnetic field points straight upw5 a *5ckka6fmp l8o5saard, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic;qnx6gg:bju-k p j /0b field. The magnetic force on kbbpn-gqjx:ju g;6 0/ this particle

  A charged particle is injected into a uniform magnq19s9u46spt qsw3tba a5abp2 etic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the parp 2bq5qt6bt1uaswss9p9 4aa3 ticle will

  A charged particle is observed traveling in a circular p +hp.g+sy+w zhath in a uniform magnetic field. If the particle had been traveling+ hsyh+g.zw+p twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a unifl )rm(7r7t1+tiu mv6ha 5hoe 6z: dzylorm magnet it1hl d67mruez 7oma+:(vhl6z )5y tric field. If instead 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 spa*6v4qh54+rqyxgofs, m7jk feed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts oajv4g*fs h mx6kq5, rf+qo4y7n it is

  An electron has an initial velocity to the south but/ej 7/z0 defjs is observed to curve upward as the result of a magnetic fi 0j7s/jde/ ezfeld. The direction of the magnetic field is

  An electron moving along the +x axis enters mewt13 it cf 17ig ,,fkhx.cu)a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the electron?icu,fmwt7, hfti k3. cxeg1)1 (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-caro 4u9:l.den tnrying wire is

  At double the distance from a long current-carrying wire, the f)i52sm6wv rm strength of the magnetic field produced by that wire dec6s2)5mi rwfvm reases to

  Two long parallel wires placed side-*/l0xal-t phd+ i.orcby-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you,+p c*otda.-/0 illx rh 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 placed side-by-side on a horizontal table*v qqoqr3oal2e wp877 carry identical current straight toward you. From your point of view, the mag73 lqe78qv or w*pqo2anetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the fop 8p job(/4vgerce between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force p oebj(g4v8p /between the two wires?

  A long straight wire carries current toward the east. A proton mov d1+v-l5h1h ashbb)j nes toward the east alongside and jh- 5n+vbj 1d)alhs1bhust 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 toward the bottom ofocom k6gb(8 u- the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularlyb-k 8umg6o o(c 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 dt *)uh9p8dcd)gy/ thtable. If the wires carry current in *p/tdchdt8gy 9ud) h) the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If r3: +s i;,58we2ilxde vzwbxo the wires cvi+rxo,l5 s ; 3xwwb8i2ezed: arry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from br3 yn,ep8jc(one strand of wire and both carry the same current, bu ,ncp y8b3rej(t 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 ooi.oo.7d: se 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 moment of the smaller loop, ooeisod7.:. othe magnetic moment of the larger loop is

  The maximum torque on a cufcz 2)imy.2b6of,yb qrrent carrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vectorcym2fb o)q,2.yfbi 6z is

  When placed askew in a magnetic field, a current carrying loop thaaq8, f.s3s)nz lndt f;t is free to rotate in any directiof8a; qslfd, s.3tz)nnn will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric motoryw4cs.35t bk ns? 4.ytcnb 5ks3w

  A circular wire loop lies in a if-p6.s8nai pab1my d .:fd* ahorizontal 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 bppd m-d: .8 n*.af 6iiasyf1aby the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is acceleral4 1nxe p frh 8b 9wjfxhibpy/j/516s5ted through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular 5/ihjs/y1ef6p19l48w nbfx x rpj bh 5path 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 particdk mr+*9pu2 mnle 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 velocity srd+u nm9mp*2kelector, 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 paralleljb;4e2y n gva ;ww3 q+ayrx:1u to a uniform magnetu wxj2y 4rg q3;;nv:w 1ae+yabic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current ofe.2 kgv( *uuxt 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 mckhsu*o(c u g8z a1,3wk8 d. bi4yna,weter on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an1bk zc38y(,.ocn8wsh a,4d iak*gwu u 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 magnetic fiej /;el8rbw9u)pzs .x/woudu5 ld of 0.10 T. What minimum current in the rod is needed ;j pos )l9 /w/x8 5edzrbwuu.uin order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magneti g4-hkz6nbqxb 0(k1w yc field of 0.20 T. What is the magnitude of the magnetic force on tghx 0z qw-nb 1k6(4kbyhe 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 ;7 in0awx 7u0shwl-neo;b cf*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 odjw0q2dzrg *l7ro+9m,jp j l (f $5.0 \times 10^7 \; m/s$ 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 travelinntz19:af a:t v7eif x/g due 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 spe5 (amqdqi /nh5ed 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 spr5 , /cbh un44ersati.ua/pd. gxmg 3+eed 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 speed43avt n.v.c pdbpum*1: g0 3xoc w1rly of $3.0 \times 10^6 \; m/s$ 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 wi nl74 - 8,0 dtepcd*8zogzfbetre carries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wiregbe dctnp04dz8oz8*lf-,t7 e?

  A high power line carrying 1000 A. 9 ya bk6w6.fp3kv 9or ap2p;:wyjj0;utcure generates what magnetic field at the ground, 10 m awaa.:2r6;pppuaeuw 3byk 9; c ow0.6 jrvt 9jfyky?

  How much current must flow fock/j (dh 4o kr:b7df g2qn*i6gr $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straigrvf9 jaz; ptv y+ :np vsxj/4/l-cf.*yht wire carrying a current of 5.0 A is the magnitude of the m/4;- az+*t. :/syfp9fnyjpxl rvvc jvagnetic 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. Th ;d,00v gffu rae7zk:iey aregr;f0 07u:fkvzd a i,e 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 from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directslw2 9+co1 7swae*da zions. Th2l1zows*as d+7 e9acwe wires 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 opposi;lcadnif5b -b x m,:d8te directions. The wires are separated by 0.20 m. At what point between the two wires are the contribu;md5nda- bx:i8b ,lcftions from the two wires the same?

  Four long parallel wires each carry 2.j:v*r 90aervf /h) mwz0 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 rf9:mhw j a0v/vrz*)e the other wires?

  Two long parallel wires carry currents of 5.0beuxv;.g 8t ;x A and 8.0 A in the opposite direction. The wires are separa8tv.u;e xx;g bted by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at tv* 1,it -evndwhe center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in vw1det -inv* ,the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. tt blvs27v3e/fb f f3vd0q p5+x+tk/ h07xqeqWhat magnetic field is produced at the cen3l/tq0ptxtebsq f fv+ v5x7q3b2+0h /vk edf7ter of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns i6w fe0ge6.t *x* 7tqmplpeft yx2n;1i8rfzq* s 0.10 m long and carries a current of 4.0 A. What strength of magnetic fie e* tfr xt.eq xefiy6p8mznp* *qfl01 ;7twg62ld will it have at its center?

  How much current must pass tb0do f9e4. 1y oirpyh4hrough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the 49rh4y .pbooei01 fdy center?

  How many turns should a 10-cm lrw7 bvb .wc.ti(/n*fw4uett 2,/ qn sw x.ihu5ong 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 129r j ;8(z)vn4uhb sipq0 turns that carries 6.0 A if its dimensions aru;9(hs4zb 8q vrn)ijp e 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30dp21ry1*l)ar hhfbkb w,p;jzxm(vi 6h c +6t8 T. kcp1rt i+armh6; zy(p bh1 ,fxb )h68ld j2*wv The current in the 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 wxrch ekc)3a3;tn:to ga 7 19gjire 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 curk)yv-pp2u k4i) nvf+qs*dn , brent of 2.0 A is in a magnetic field of 3.5 T. The loop has an area pip-kb*2n y )+fv4s) v ,nkqduof $0.12 \; m^{2}$ 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.*iv717lbt(14o njibc nng *ul 30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parvji( glt7nc4 u*bio*117bl nn allel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unrk/n3sl,l: winl)-j8 d sr n8ciform 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 parallel to the mas- :l) nrwn3c nli8,rd8lk/sjgnetic field?

  A circular wire loop of aok 0,s-1 nrhlqrea $0.25 \; m^{2}$ 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 parti5lt;e r q f yhdy*g3z1:5mhub7cle (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 wi6i(4g6ns2fo -n mpz b,lzq )5xu6lae ith 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 5zu,i0e( al kyinto a magnetic field zl(0,e k5u iyaof 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. In 3au ls0-va 36 q8bjafkw)5qxt enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. De 38sau- qj3)bqlkxava w6n5f0termine the radius of the path it follows.

  A beam of electrons is accelerated through a potential dif-xvq+r 2 cbd:eference of 10 kV before entering a velocity selector. If the B-+de:2 c b-qrvxfield 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?