If the north poles of two bar magnets are brought close to each other, the magn(i0h382 qej gmav acz)wle11cets wi10gjh )1lcwacvz2a3( mqe ie8 ll

  If the south pole of one bahus hu9w85na*c r/7ep r magnet is brought near the north pole of a second bar magnet, the twonhw e/us 9h8*p57 aurc magnets will

  If a bar magnet is divided into twoz8cz1ch 1le 6kx km v/+fin-f) equal pieces,

  The Earth's geographicss485do j7xrrqa rq6 : North Pole is magnetically a

  The south pole of a magnet points toward the Earth3jqb2eur: -;i8 vsxvapa yl(- 's

  An electric current pro(pu23q zrz/l s:)lq68 y+fj u*rcdrrr duces

  Which of the following is cojvf(;d (d+ng rrrect?

  A vertical wire carries a current straight down. To the east of this af 5+th, pcym7wire, the 75ptma,y f+ hcmagnetic field points

  A horizontal wire carries a current straight toward yod0 e onxj;20cuu. From your point of view, the magnetic fiel0eu j2oxdn; c0d caused by this current

  A current carrying loop of wire lies flat on a table top. Wha32ou9v; qhg gen 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, outside the loop? The ma3; g2 hqg9auovgnetic field

  A current carrying circular loop of wire lies flat on a tabl-sgq:om-q-5dqxm*y x e top. When viewed from above, the dy 5:x-omgxqm- *-qqscurrent 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 field is tk gs78wi 5n0fxtub,u( pp)8nshe

  1 T is equivalent tojya.ml c )e n5,ela*zu:09d aq

  The direction of the force on a current-carrying wid41xl+ nbz5z vre in a magnetic field is described by which of the followzn5 d lvz+14bxing?

  The force on a currenye6yqp ykapm3+ f:f92.v7gy lt-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field i4zi-z q yx i2,x2yt c-2 38,tkacgr puh.xr*uns equal to zero when

  A vertical wire carries a current straight up in a region where the magnetic i+abu w7f;ja5 field vector points due north. What is the direction of the resulti+u ;7j5 wfaibang force on this current?

  A charged particle moves and experiences no magnetic 7atj(,lo2 gu yforce. From this we can conclude uj,la g(7 y2tothat

  A charged particle mov31c6uvg .v xds,l7x gaes with a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maxsv.3,dv7 l g1ax6cxugimum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic ff7gyzgr.3jg n 79obw578hsnn orce on this particg7 7wgo rngh b 9.zfnj7yn3s58le

  A charged particle is injected into a uniform melms/ (rma5r ;agnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the par(m;l s5mea /rrticle's weight, the particle will

  A charged particle is om9:ta (lmzrhgft;h+r 5- p dn2bserved traveling in a circular path in a uniform magnetic field. If ptf2gzh m(ra;r9 hnd tm:+5l -the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular psyz7d5u/ a ;frath in a uniform magnetic fuz5a dsry/7f;ield. 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 a.q.w 4mgxh/ko2h uc2pt speed V in a uniform magnetic fielx2/.ghc4ok pq m2u.wh d that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but lz6hq0d)vjggm o;xkkz rxn 6* 55,a4 dis observed to curve upward as the result of a magnetic field. The direction of the magnetic 4 rg q)5g ld,djmh5ok6 azxz6*vn0k;xfield is

  An electron moving along the +x axis enters a region where there is a unin j,*npmeo+v ,m0qbpwq-a8z2 form magnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up*bzajv8wonm2 q- p qem0p+n, ,, and +z out of the page.)

  The magnetic field produced by a long straigon--*-oefzt 2utfq4t ht current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of6et1q bk8uyy 5 the magnetic field produced by that wire dec6qk1 e yyu85btreases to

  Two long parallel wires placed side-by-side8y7( 4co tiyjpphwl19tcz i84 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, tptip(4tiy hc l 81jz9cw487 yohe magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal t bo,9v oa,u7a (,wv9ubsll8v qable carry identical current straight toward you. From your point of view, the magnetic field at the point exactav lvbw,v,a 9,7u o(9u slq8boly between the two wires

  Two long parallel wires ;jkl -k2oc44n 4y2 fvhkp(d au7hka*vcarry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What4kfnau4lk c pvdk;4 - *27yjhoahkv(2 is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves towg-17p wlmeqdu+z 714exz*i pco/wyj zz30*qxard the east alongside anzq wpe3zzxi dux c/4* m17p1+jez- y*g70q wlod 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 t+m(a l i,m gym6ggg:z j9lfw2+oward the bottom of the page.g6y+mlwf(gzmlm, g2+9i ga:j 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 the page, from your right?

  Two long parallel wires are placed side-by-side on a4zjugg g..n0ug4;nm-8 gzcr m horizontal table. If the wires carry 04mgrc-.ggnz u4gm gj.uz 8 ;ncurrent in the same direction,

  Two long parallel wires are placed side-by-side on a0,vvi,e jk0xe yx7;*gd bf6q 1ktv 6la horizontal table. If the wires carry current in oppdkjakx6 x0 *7b,ql 1vevie0g t yf,v;6osite directions,

  Consider two current-carr zrs9zpqvh6i)/po8p 4ying 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 magnetis/8zr i zp 9pv64oqp)hc 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 one c6:8 /:hvlx0adic aih strand of wire and both carry the same current, but onedlc i:hhi/:va86 ca0x 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 wh9.kl6k6;hqd bg mqt d1en the angle between the loop's magnetic momenb6mq6t l.g;9k1q dk hdt and the magnetic field vector is

  When placed askew in a magnetic field, a current cari ko o (kmlda+icg zdq/8.3v-/ ,xlb+jrying loop that is free to rotate in any direction will experience a torque until its magnetic mo(i.d/q cjo al-l+kb,o3z mk d+gxi/8vment vector

  What fundamental fact underlies the operation of essentially all electric motor4x wo xmpgbe urei5 soc:1*os- r7v00:s? ibr u-1oo p:wsxc 7s:geeo5*x4vm0r 0

  A circular wire loop l3p/m)5vel/ bamkwo:x ies in a horizontal 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 currents interaction with /5eop m: xml/ abv)k3wthe magnetic field?

  In a mass spectrometer a particle of mass m and )zi7shzps4h 6charge 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 uniform and oriented perpendicular to the velocity of the particle. Derive an expression for the mass of t ph46izz )ss7hhe particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through crossed elecdi 2fh8du o;;gtric 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 particlidoh ;2 u;8fdges 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 cur k+c(( okn rkhmm+ifu bn.26xt95qr3rrent of 0.60 A is oriented parallel to a uniform magnet nkm+b c r9iomfu (k3q25 tk6.(rhxrn+ic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direcf9 *gmq;8mbkl.- k v6nuuit )gtion 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 whend-jzq u5 n(maf: vd3j. it is placed in a.dd5-ufv 3(qjj nza: m magnetic field of 0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 6wgn5f gfkjg.w3yh8l:l /rg 9 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum cu.jk9llg35/ ryn :f 6wwfgh gg8rrent 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 magnetic field of 0.20 T. What is the magnl*tvf+v, i 7s 3kqi 0;kvpe9wlitude of ;37qe i +tv9fpkli kw,*vv0slthe 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 x k,+n.irz) qxkyuzy*0e:l)ra 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 sp+ zgko2syuzn rzl ;wd;19vnm9 t0 m( p/x)2yegeed 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 due north with spee u:kht4uje y/7d $4.0 \times 10^5 \; m/s$ 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 10srsm -is-/upd, ga 79kg ckla 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 a speed ofyq0c8u .rrb:nqfbwl-,lm3 38 da nhzz2i. px. $8.0 \times 10^6 \; m/s$ 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 x l3 vrxa1*yyq u; f62zlglcm999/yic 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 wire carries a current of 25 A. Whatrw 4-xi6/q2yu*xtr4tz oc:e q is the magnitude of the magnetic field at a distaqtu*x 46wr e/:rz-q 4tc2xoi ynce of 0.15 m from the wire?

  A high power line carrying 1000 txde 3nt 2g - 6k)vus6nzuph50A generates what magnetic field at the ground, 10 3sz)2 06xghpu-tuv et5 k6ndnm away?

  How much current must flo7fllg(v fq 4lq.:6m8dlrij i5w 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 sc yuv2nj-24z wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field o vu- 2z4ncj2syf about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They arg 290 6*eothbzgv:; eqve6 )tbadbsr 3e separated by 40 cm. eq)6;9szvb*brgohe6eb a:3g 0t d2vt 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 cuy4 xdq01r o1m,kiqwk ), a7soirrents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magneti0ox4, qq o7 k,idy1sm)ar iwk1c field midway between the two wires?

  Two long parallel wires carryrm *8e8-:tlmk9qm y,, v; yxbkeag is* currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At whb, 8ex msly** -qkti,v ;kgym9r a8:emat point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2y;s4 u+kuw9tk .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 wkk4uyut9 +; sthe wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A inzk5 /d l--z b6+iyqojl the opposite directdo5+/qliz-bk l6zyj- ion. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic fielp g:r1de ,wjk.om pd09d at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wirew r0k,mjoe:d 1d9gp. p?

  A solenoid 20 cm long is: h ,j+dsn1sgt2-vme e3m*sw6now p)l wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A f3 j)no:+ve-em ,s6w m 2 gs1nl*dpwtshlows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. What ih/o dkmrhz2 of3a - 10u*,kggstrength of magnetic mh *,oif3r/o0 ggdh1ak-uzk2field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long too ;e kxi6t:n)w generate a 1.0-T maw)teki x; o:n6gnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to ;sqitde *ro;u; ,h0j egenerate 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 th1,xz8zgb rbe2grd4ry hh9 e: )at carries 6.0 A if its dimensions are 4.,gdxb 9h14 h:eze2rb r rg)8zy0 cm x 8.0 cm?

  A circular loop of wire of rs/36cnfkcwa j* f5 /xsadius 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 tok6a5*sc3cw sj/f /xf nrque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crossnogak75fq1i,nt 56h k-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 of 2.0 A is in a magneticaa 1zm y ;spo9bs1eob;,;ek/r field of 3.5 T. The loop has an area ofs y,rab;eem o;o9sap;bz1k /1 $0.12 \; m^{2}$ 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 oy.ngcupxv/lb v vvmu435 37b. f 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is paralle/cxv7 lunvmuybv5..3 p3bv4 g l to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unifor93fx aq5m./w2ei a6fai l:paj up 46ygm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the pf 2a9apqfxa6 y3:/ wluje6ai 5m.i4pglane of the loop is parallel to the magnetic field?

  A circular wire loop of ap9mx .wqez xtpo/.j8kp p/g **rea $0.25 \; m^{2}$ 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-chargec6 srfqdw.fd 7z0l /m:d 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 veloctds7o2e2 /ssw2bry ; mity $6.9 \times 10^6 \; m/s$ 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 an uvpi,j3 s+b59fjxvk1 t5j)o od then moves into a magnetic fielxok,spj f5u 3 tij1)bv95+ovjd of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated yifs,.i p)3se from rest through 500 V. It enters a magnetic field of 0.3)ss ef,i.py 3i0 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differenc e dw ob1+9qy)41vjrcge 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 the E-field is required if the particles are t11od 9gbwy ecjv 4+)rqo be undeflected?