If the north poles of two bar magnets are brought close to each e:xr- lt)y,5rrpir9s other, the magnetexi-9srtl5r)rp ry : ,s will

  If the south pole of one bar magnet is brought near the nor( plrdz7.-at ath pole of a second bar magnet, the two magnets w tz-(.7praldaill

  If a bar magnet is divided into two equalclx1 4x1 y6ckb pieces,

  The Earth's geographic North Pole is in/ska) -w;onmagnetically a

  The south pole of a magn mhkyqb65:(zl et points toward the Earth's

  An electric current productzcqhg/3 dl/t ej5h-xk mugvyx94 166es

  Which of the following is 2xrm u3 979ee fei06fl/p8htq;vv uakcorrect?

  A vertical wire carries a current straight down. To the east / odn+ro q, y0a5nhz8pof this wire, the magnedy0nh+zr qono, 8/p 5atic field points

  A horizontal wire carra k2)+ a;bukzun(af g rejp((7ies a current straight toward you. From your point of view, the magnetic field caused by tpg(au2 uj (aaekb ( )r;nk7fz+his current

  A current carrying loop of wirzb4w4 t0h4bj a o vbv(*udj7+s.cyxp* e 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 cub407+ *v(ydjvwba* hx sczbu4p.jot 4rrent, outside the loop? The magnetic field

  A current carrying circular loop of6zfqur*dq: par8 ja: / 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, insiu*rfr: /dj :8qz aqp6ade the loop? The magnetic field

  The SI unit of magnet0;mub. is)ld lic field is the

  1 T is equivalent tohxz -u+gtd:0shj6 , lh

  The direction of the fce*-gl* 5 +paqch1apd5b sm:z3s d,byorce on a current-carrying wire in a magnetic field is described by whimasc,h gacz55 - +s*d ybl qpdb:p3*e1ch of the following?

  The force on a current-carrying wire in a ma*qb ,ld co y,ua;pbxua-da3 *2gnetic field is the strongest when

  The force on a current-carrying wirjf9 1r7 xbd3 s8ttum+lg.e3oce7v hq5 e in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magnetic b) .am9yzl0m d26 bqgvfield vector points due north. What is the direction of the resulting formb)qyg6 mlv 90da.z 2bce on this current?

  A charged particle moves and experiences no :- go: wix 26 eb7kkx;ri,tqt,qugs7imagnetic force. From this we can conclude ;x,- sbiguq xr7it:6k kq72i,gotwe :that

  A charged particle moves with a constant speed through a region wher(ya 7ky,jv 1koe a uniform magnetic field is 17 yyo,vj(k akpresent. 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 magam*d iuh,jkv y,5q -k/hcss:;netic field. The magnetic force ocu* ,sk5vjs ik/, d-y;m qa:hhn this particle

  A charged particle is injected into a uniform magnetic field such that its ith nj m: /y.6x;is0rf(xoraja*gj7 ,velocity vector is perpendicti7hjf: ga *so;mr6i. xjna(r,j0 /xyular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a:pghsq1,nl * x uniform magnetic field. If the particle had been traveling twilx1q*ng:s ,p hce as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a qaxxye+7dbw*sznh2qp 61 +.c uniform magnetic field. If instead the particle carried a charge of h+swaxycqqx d276+pb.1* enz+2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniform m axe4emhrdp4* wk:.2 yagnetic field that is directed straight downward. The magnetic force that acts o w. r2:xpkh4* dmy4eaen it is

  An electron has an initial velocity to the south but is vho6 sik ).itfp;3l(iwmyt (;observed to curve upward as the result of a magnetic field. The direction o(yvh kiftipm.s);w t(;l 6i3 of the magnetic field is

  An electron moving along the +x a (q6*,p) adk.;6dhltu ephwf mxis 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, +y up, and +z out of the paqah*l6w, ).hp edkm;6(f tupdge.)

  The magnetic field produced by a long straight curre-l0 pig/x kn8xnt-carrying wire is

  At double the distance from a long curre6 pk8312nhabusaisj a.clc /1nt-carrying wire, the strength of the magnetic field produced by3p/b2hksjcnl1ua68a 1 isc. a that wire decreases to

  Two long parallel wires plt8(8guubflqs 7sjd3qhf 5r-f ys3t1, aced 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 ur,(flsd qu7j3tthgsf38 q5y81- bs f 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 carry identican. agjoy,n7 f69qfftc :sp1p 3l current straight toward you. From your point of view, the magnetic field at the point exactly between th.opffg c9yn:,jn73 sqat6f p1e two wires

  Two long parallel wireic(.+7:.um ytgm yk/5pkkrtbmclw. 1 8e a r/ms carry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the t.7cm(kt/. 1awe 8mk+ urmky /.ygtrl5c bipm:wo wires?

  A long straight wire carries current towar5,dh7my4 l(ot bvv/ xod the east. A proton moves toward the east alongside and just south olv(mootxd4 v75y /,bh f the wire. What is the direction of the force on the proton?

  A wire lying in the prpjok+- e2k5m qv)p;h lane of the page carries a current toward the bottom of the page. What is the direction of the magnetic force itqkp) ; +om 5epk2vjr-h 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 :rsi-s fr0)ya+7u austable. If the wires carry current in the same directioi)0sau fu+srrys 7-a:n,

  Two long parallel wires are placed sy jk/zk 79:shxide-by-side on a horizontal table. If the w7 yxkk/9hj:zsires carry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strang itoseoobz8;v,-12/ /pb di od of wire and both carry the same current, but one has twice the radius of the other. Compared to the dsi/ 1,p-eooigo;8z bvb2 o/tmagnetic 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 str 8b)ul,qcpe43r wr iz fhi;zkjc+ki434o+h :r and 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 momcchhw4qr3 4lz3 ik+o8rk;, i)e: jf4rupzib+ ent of the larger loop is

  The maximum torque on a cuy- ; 9b h(3oc,p5czct7 ktqtlhrrent carrying loop occurs when the angle between the loop's magnetic moment and the magnet-7cqk,y zc(cot5t 3 th;lhbp9ic field vector is

  When placed askew inyllns+qe3wk2 ay)krr ;1(t 2d a magnetic field, a current carrying loop that is free to rotate in any direction wil3yne(q +tkl; ayd 2r)1rl2skwl experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric bocntk/a* 4p-ceh.kp.e zcy2 ,b8)gl motors) be4kz lc*n/b ek.ahcp.t-8g, yopc2?

  A circular wire loop lies in a horizonkz 4z;ul9b;ebu ;hiq w ,8jhk0tal 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 0ulzi ;w qukbh4b;9, j8zk;ehcurrents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is x 5431+jrqauvus nkv5 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 the4 uvsx ka u1r+5n3jqv5 mass of the particle in terms of B, q, V, and R.

  A velocity selector consists ofcd-u20 6fwur u:wvbi,g 3vnt5 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 velocity selector, the particles move toward the east, and the magnetic field is directed to the north. What direction should the eleifg3u5 : v u62-0tdwnbwcvu,rctric field point?

  A 2.0-m wire carrying a currenedp7jeej4 q7 /t of 0.60 A is oriented parallel to a uniform magnetic field oe ejj47p d7q/ef
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10v5v1 ,3aoo*i deqyg(u 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 meter on a straight wire carrying f4v h-*mnjs9p 5.0 A when it is placed in a magnetic field of 0-ps4hv 9 fjm*n.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m ,jb)nx-3gs kclong has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum cu sxg)c3kn-,bjrrent 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 mag jxal*7w* 50(km ieynn4en 16abe( erunitude of the magnetic force om5b4nl7r* 0e uawyeikj 6e1(an( *e nxn 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 fcdhu*h i y* u4l.77ee95eaxcspeed 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 + klksp+x+vk; uuw90yrl.i,ga 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 due north with s3cw7khyhz g )o0sd9 )fpeed $4.0 \times 10^5 \; m/s$ 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 speuuvk x:w8, ,j+nwegx: ed 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 spee9 ws0 3l0vgjzed 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 lqn6j fyp)u2-$3.0 \times 10^6 \; m/s$ 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. What is the magnitudg666-7dbncw1hlqsx kjr , / nae of the m-hcnkd w666jr 7ba g nx,/lqs1agnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fieldc. xr2 jraab:fio4. t. at the ground, 10 m awayr.i o.bcja2fr 4:.tax?

  How much current must fl8gw8 wol3v( xqow 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 carrying a current of 5.0 A is the max6(cja3v bze*0ajw7zmw 53 d qgnitude of the mam3cj0ed3 w (w *7j65zbazvaqxgnetic 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 oq:cgn75q,k f4gq pl5k /+bqked83uk tf 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 20t 4g3qqk: nuq+dbc qpg5lke,f5 7 k8/k cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20f -hws4 mv *a4n+d3ghg h5w r8lr(9qnm A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetig44 -f9 hshgvw 5dwmn *8lh(r+ rnam3qc field midway between the two wires?

  Two long parallel wires carry currents oiqlaonh9l,e v1z i(5/f 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 contributi9v5h ilie,/ o (zaln1qons from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. They q*3 atav,pzr)ri k.9ukc.bt,1 z.,q( va n qooare parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positiontoz.a)* .qobr(,, 3v9p.k 1ikactzrnq, v uqa ed in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry cur-jwkn:bw m g4o78 kp)vrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0kvnk4-m bj8wpo w:)g7.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the cendu aw):s,.q ,q 6woawmter of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in thw ,qsm):a ,.uq6owda we wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What man(/1 h gco*rlmke:bq; gnetic field is prodeck( ;/no 1b:hqrlg* muced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 tuq.6w+1zvk c0xx (rqd qrns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at zvqxcx1 drkq 0. (6+wqits center?

  How much current must pass through a 400 turn coil 4.0 cm lohsq wf8 6uw xs ;.//,ymxocf4(em)zvkng to generate a 1.0-T magnetic field at the /8.,sem6y kcxs/f f4 qv(;uhwomwx z)center?

  How many turns should a 10-cm long solenoid have if it ismo .q4g 2- nbou(x3 py3cdjx6j 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 that carries 6.08 ml2caf rzcg, mpu9*1 A if its dimensions are 4.0 z8mugcm2 ,l c rpf*a19cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field -v l((qh qxe,wlmjyeq/e4j ,9 of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop ih(-m/qj , y4llwe(qqee9x jv,s perpendicular to the magnetic field?

  A circular loop of wlvhh-,3ga (m hire 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 a8rtw ed0:4 xyo current of 2.0 A is in a magnetic field of 3.5 T. The loop has an ao0:8t drxwe y4rea 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 aomnv.+u 6 pnl(*0 ang-8f vjre uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane uon(pga6l * .vnfr+n0m-jev8 of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m ik1;4 tr+tw;rc 7s gx ovq+z(e m,n*xzzs in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. W s;n+ oqxr(recttz v,zkx;z1m*4g7+ w hat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of ar /0qmgpkgl98m ea $0.25 \; m^{2}$ 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 sl)5kpjn cy -x:zo3 ;agpeed 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 ww/f u5-rt: a6yundze0ith 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.kyti418e ;ge y0 kV and then moves into a magnetic field of 0.040 T. What is kieye;8 t1yg4the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field o+9 )mr/fk.qfhg-nj f4el pky(f 0.30 T oriented perpendicular to ifqpk)h9y4n-+jr gfm.ek(l/f ts direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated onodp4f2 f3c7 through a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocdf pf7342 oocnity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?