If the north poles of two bar magnets are broueaz.(fe)hn c lx2q7vgqtcy27t4 d q 5-ght close to each other, the magnets wilf 52dqx2q7tgcey ect7z)(la.v-n4h ql

  If the south pole of one bar magnet is br :yi e.z fo4+i 4jeaktdg8;zxce,k+)wought near the north pole of a second bar magnet, the two magne:zeiko+kfztyax wg ,4 8 i.e)je d+4;cts will

  If a bar magnet is divided into two equal as1) o1qv7xmf pieces,

  The Earth's geographic North P y3d i-fw85(b5vgfayg ole is magnetically a

  The south pole of a magnet points toward the Earth's9iy54f 1ofh dca*b von.r :n/r

  An electric current proa5fyfm5/up3xi o -(edduces

  Which of the following is co ex w42k4n/o;soaa+p-tt5ly1lx n /r orrect?

  A vertical wire carries a current straight down. To the east of this wire, q*p 1swgwhj0:the magne0wg q :1wsjh*ptic field points

  A horizontal wire carr9s 6q :,+vge6rot51sm. xybx+wochw dies a current straight toward you. From your point of view, the ma56+ w hr+qos.,69g ems1: dxvtwocybx gnetic field caused by this current

  A current carrying loop ofxl3fb:(r8gu chiawoh2 62oiaw:n5 1 s wire lies flat on a table top. When viewed from above, the current moves around the loop in a countx:hsgnc (w 3hr:i2bf 1wa 2iol 8u5ao6erclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circ of8l-v,eple - u4wt aij)3-jwular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a countel-)wj4je lef,w3t-a8 -v ioup rclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fiedwzbd (8-sm6zld is the

  1 T is equivalent to 0wyc* 1mz*xve

  The direction of the force on a current-carrying wib.tz3a :t6yhlre in a magnetic field is descri36ha tl:tyb z.bed by which of the following?

  The force on a current-carrying wire in a magnetic field is the stronge hgvmi81e9(:qt:lgqest when

  The force on a current-carryiuoyym3u8utrtfv*c;8 + bo a (:ng wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a regio d d0 o3/hs,no6tw)nqkn where the magnetic field vector points dueno6khqw d/,03sntd o ) north. What is the direction of the resulting force on this current?

  A charged particle mobv1blyl 27o u49d0d q:visg z:ves and experiences no magnetic force. From this we can conclude t blz7o9sg1lu 2 dvq:4db yi0:vhat

  A charged particle moves with a constant speed through a region where a uni uy-wsg:cd 8g)2d s,xjform magnetic field is present. If the magn gjc:d2 ud-g x,ywss)8etic 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 magn xx8jq r46dxs 51 f4jk*awdr0detic force on ts60jx4w51x8rq kdd 4 x*d rafjhis particle

  A charged particle is injected into a uniform magnetic field such that itsx3v0; y;c i kn+alteip6vf1 xs ;t.hr7 velocity ve 0 +niykipalcx1;;e63xtvv.r; fs 7th ctor is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed travelin1 sidcvyt2s 0(ns l,.qg in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the0n1s,l c itqys2.dv(s circular path would be

  A particle carrying a ccp5b kyt :/id9harge of +e travels in a circular path in a uniform magneticck it/:yb9p5d field. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electronia5 o cxupf+j6c9 2b wf92lp7n moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic folb2f6op nafxp 52 ujc9c +w7i9rce that acts on it is

  An electron has an initial velom4dt6lxd2s7bc5d-dnb e. :yy city to the south but is observed to curve upward as the r7nbced mx62-4:5bd lt.d ysyd esult of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a rxn-;( 6 blads qwf0(giegion where there is a uniform magnetic field in the +y directiolb( sxqiw;nd(-a fg60n. What is the direction of 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 curre68yukq aapj56um (9 zent-carrying wire is

  At double the distance from a long current-carrying wire, the strengt3lsb)oinq au 1ul,9. cx ;oevud.i5c2h of the magneti nduui ox5cvs2olu3ca)b1 l e,..i9q;c field produced by that wire decreases to

  Two long parallel wires placed side-by-side on (/km-v4uj(tytrd n m,k +pj)y 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 betw(rym tutky (vj +-/4, jmdnp)keen the two wires

  Two long parallel wires placed r t:gdgn1 2gyl-.f*ks side-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the poinygn21* ktl d- f:ggsr.t exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force bd.ouzx l+yu7 v q49gfnf9+gc3 etween the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betweennqf v+ 947cyd3.zl9u+g gfxou the two wires?

  A long straight wire carries current toward the east. A protlu k0dxed mh6p*q( 0r-on moves toward the east alongside and just south of the wire. What q0h6 -mudxepk r 0*(ldis the direction of the force on the proton?

  A wire lying in the plane of the page carries ax h.kh0ps,lql9 cto.2b )qt5i current toward the bottom of the page. What is the direction of the magnetic force it produces on an ele0sp,qhkq h.)b5o l2l9 tcix t.ctron 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 the ;ovd,mba/2p* n:v cyj wires carry current in the samv2,dn: /mj*p;yocv abe direction,

  Two long parallel wires are placed side03( zlxmps:1j( 1wmehxgr -ka-by-side on a horizontal table. If the wires carr:1xxam wg0sm3e1pj-(k (zlrhy current in opposite directions,

  Consider two current-ct)u:cw xz;nt+arrying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the rw :+;utntz) cxadius 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-carryi26gmx plg7j8h ng 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, the magnetic moment mhjg7gp86 2 xlof the larger loop is

  The maximum torque on a current carrying l2bel.n cn. x w/rm2.wdoop occurs when the angle between the loop's magnetic moment and the magnetic fie2 rcw .dexw.lnn./mb 2ld vector is

  When placed askew in a magc +ep5*6h az86mlndf 7ewfemnh r ,*+cnetic field, a current carrying loop that is free to rotate in any direction will experience a torque unti f*l 7hnz+wacpmn8 *dm+f65eheer c,6 l its magnetic moment vector

  What fundamental fact underlies the op)a ss x q;ix7t:8 /c6rz,npopveration of essentially all electric motors? szirq;/c6xtpan8x) v s:p,o7

  A circular wire loop lies in a horizontta27) e )ybwme i6 hy7i37zoaf* oi5fxal plane on a table and carries current in aiib2a7e5iff 7a6yw e z7m 3oy)*)xhto 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 the magnetic field?

  In a mass spectrometer a particle of mass mh+ v8t4c17ej6bcyqt e and charge 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 thy61ebvcejcqtht+ 8 74e velocity of the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consw ap qi-yvek :*bqyv 1h+amf/(51r* wyists 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 y qwrak* 1qv:v*hw -p(1fyemb5a+/ yithe fields. In a velocity 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 a current of 0.60 A is ori w hy:-a3szim.ented parallel to a uniform magnetic field w-h.z ami y3s:of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction p1j( /acd5fch4xcmvhiu, r/ . t0lm0oof $30^{\circ}$ 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 wfr 31.h3x db8nh/ep mwhen it is placed in a magnetic field of 0.020 T? The wire makes 1.hr3/dhnp8xbmw e3fan 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 ind4d5u xx zed6 , *t2-fakh,fvx a magnetic field of 0.10 T. What minimum currentdxah-uzx*,f5kxf 2v 46ed dt , 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 id*t wdmk9)ef 5nyku /4s the magnitude ofeku)t 4w5ndk /9d*myf the 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 a speed ok ;gvwzb5e*6j f $5.0 \times 10^4 \; m/s$ 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,hg gw6 yl5e*x1eu7 *uwp8fti 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 witmn lk :cb60a2ru 3a2osh 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 speed ofw j8(bm/2;ndd exk2yy $8.0 \times 10^6 \; m/s$ 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 spp/x;dcka0v+k 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 speed ofu ebal/:v lqail 9woo5b2+;n : $3.0 \times 10^6 \; m/s$ 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 magnitud/wa+883olzanrhe )o aeve8o((bt 7w gj8zer0 e of the magnetic field at a distance of 0en88ao8(ha3t87lz / zber vw0re+)gwja ooe(.15 m from the wire?

  A high power line carrying 1000 A gecpc ,,ijevct wa 6,6wu.ua4-onerates what magnetic field at the ground, 10 m a ,w6u ,o .awc vcu4jc-6ai,tpeway?

  How much current must /r7c nk thu1)mflow 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 st:xqy4)mt/pf traight wire carrying a current of 5.0 A is the magnitude of the magnetmt/px qf4ty) :ic 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 9aw2vi0r jzu3directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires zw30r 9ji2av uat a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carrwd 32wu07gxh 8tl:zm my currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midghultdw3:x2z08 m mw 7way between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposq6h glsgrf d+7790c enite directions. The wires are separated by 0.20 m.ncfr097 d7l+6heg sq g At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. nkwi2tg n:m uz-, yf6;They are parallel to the z-axis, and they pass through the corners of a square of sideu-2yzmw g6nn;f:kti, 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A azctb 3sd)xyrp i 7,z2;nd 8.0 A in the opposite direction. The wires are sepa7dcrz3tb s, i p2y);zxrated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a 0rwn4 h+h 9(jd p8qvnicircular loop of wire of radius 4.0 cm when a curiqhn4w+( pn 9hd8 rjv0rent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wou2al qqt r4+3 xc h0g8qwdl72fnnd with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 137w rt4ahndfx28 lgq2 qqc+ l00 A flows?

  A solenoid with 500 turns is 0e,c ap3clj 8k2.10 m long and carries a current of 4.0 A. What strength of mc e23lk8,j acpagnetic field will it have at its center?

  How much current must pass through a 4b/1ja8c 4ow7pbcmk4/ 0vzrka00 turn coil 4.0 cm long to generate a 1.0-T magnetic fieo/baw8k0p1m 4ac k/cjz 4br7 vld at the center?

  How many turns should a 10-cm long solenoid have if it is to gezqkeh1,e * ma6 0/uevqj0- -eqg6gyponerate 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 thater/ b qkkgtt+n( cf*o*2edk02 carries 6.0 A if its dimensions ake /g+ekr2tq(* df2ncb0*tok re 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in ali l -7zlrew;+ uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. lr+e l;l- iw7z What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of crds7e w lsn1.2vs;(b- r3bod9yt j .yyooss-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 muv- s j*n0 zeghe)t7(:fri;vxagnetic field of 3.5 T. The loop hasze (vsr-0jhfgu ; t: vx7i*n)e an 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 magnetif b(b:m2,ozgec field of 0.30 T.fmb( 2 zg:eob, The current in 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 loop of wire of radius 0.50 m is in a uniform magnetic field of 0a8h2fd e 4w-w 5b5pn.h9qyffh.30 T. The current in thehh w f9 ew4p58qd2- 5nbfh.yaf 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 aq -lw+cyb:mwc ygi42- 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-charged parti73 vyc,5r n7hypf ;jmhcle (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 velocity g8ht j,- i0i3 )gbe-jnxfjyj1 $6.9 \times 10^6 \; m/s$ 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 poten7ph; pn(sk7a vtial of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the protonk( ;s7npvpa 7h's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fiew5mb e dbp57-yz(n:xc*sr kbix4 0 qi3ld of 0.30 T oriented perpendicular to its direction of motion. Determine the rar pn:de( bm-4sx0 xyc75*b iki5wzq3bdius of the path it follows.

  A beam of electrons is accelerated through a pote1bja ;(( svq.bovup jr ul:2d0ntial 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 the E-field is( ( ud.b jpl20sr;vvqj1oba:u required if the particles are to be undeflected?