If the north poles of two bar magnets are brought close to each other, thed:s0adkyo-ui 80)t xx magnet xioa t-s80d0d u)kx:ys will

  If the south pole of ;()l 1xmxsojpb bee9egb ,d (0one bar magnet is brought near the north pole of a second barbb;gx0bx 9ee, lj) d1e(o s(pm magnet, the two magnets will

  If a bar magnet is divided into bklefqy5+ ajv67tr69 .*ue nkai-6dutwo equal pieces,

  The Earth's geographic North P oden5qwh; d3yz8)s i,ole is magnetically a

  The south pole of a magnet poinwm(8 rd, te brx4g +u u*zqctzf3-7s)yts toward the Earth's

  An electric current pri1 c;ext7,3z ;plfhonoduces

  Which of the following ish t-d)hs ddzc 6v .s)j2wy .s:; kb-julzgvt,7 correct?

  A vertical wire carries a current straight lkolzzi5 ;v)cw bz 59e29goz3 down. To the east of this wire, the me5kw3l5;bl2)vcz9 z zoo9igz agnetic field points

  A horizontal wire carries a current straight toward you. From your point of viegb ml83n:7h4ux) ju7- j4ulv1ll dzlyw, the magnetic field caused by this curljnu4 dj uvzxl41 u:7 )78lllhgm- 3byrent

  A current carrying loop of (ef fl9sr +ucqp,8puwqu9i aa49n7z 9wire 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 ca7ucl(ae+9w,9fnz ia u89qpqrusf 9 p4used by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a :4l.c/-o gndhhs d6r btable top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is t/cg6d4osh. dhrb -l:nhe direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetiitx5hcvjdc1 z3sn rz/:z w./9c field is the

  1 T is equivalent tox, gk:zx04 clp

  The direction of the force on a current-carrying wire in3fs991 pi v pguas1)uc a magnetic field is described by which of the fos31 iu)cvg9aps1f p u9llowing?

  The force on a current-carrying wirlyv0nr vt ((k/e in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field6qig5y:7 l cvlh;kk:+j yel3ky1eb *l is equal to zero when

  A vertical wire carries a current straight upbi1u k0,(*wb h tzo0 sw(j:vtr in a region where the magnetic field vector points due north. What kwrwb 0bosi*0,ttv h (:1u jz(is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From thp12-8l fynkks is we can conclude than- p1l f8kkys2t

  A charged particle moves with a constant speeko ee18w;jsh *d through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle willwk1o8;*hee js be maximum when the particle moves

  A charged particle moves across a mckjysu6 .kl20q f0 ejaekeag2r6*)4 constant magnetic field. The magnetic force on this qs06 emka2)e6a .4rfjkk*ly0 gcjue2 particle

  A charged particle is injected into a uniform magnetic field such that its ve q2 21r*h+u lckk5njvw+, bqrllocity vector is perpendicular to the magnetic fielv2u+l*,r215 j+nhqkwcr klqbd vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling 48;rrpl .)oevs y/.1xsfhgu u in a circular path in a uniform magnetic field. If the particle had been traveling twice ayh v)xu.o.e pslf148;/gur sr s fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform*f .jyu6 z6dau magnetic field. If insteyd .*6fj u6zuaad the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward atc: b/mlryj(9e, .w )*uriqnot speed V in a uniform magnetic field that is directe jit9bu:r(myw). qr l,/o *cend straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed toc,i. 0wtq( 1blk2vli p curve upward a .qp i,2wkc0lbtl1i( vs the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x qf20*wbnz b.c j9e:/j5l q x54bdrlxxaxis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magbxnb wc42lz*5dx0 r5 ex:9 b/.qqlfjjnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wire ) vzdzfe+a97l3j: pdki4ung+ is

  At double the distance from a long ceg8 4c :kq+e i8yyn5whurrent-carrying wire, the strength of the magnetic field produced byne+yiw q 5yke84 :ch8g that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal t1p h0sz 4-cfftable carry identical size currents in opposite directions. The wire on your right carries current toward you, and thepcfz h0-f s4t1 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 ca:l4stzws ;cuz-; i(zxrry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the tw(sc:xsz zilt 4;-z w;uo wires

  Two long parallel wires carry equal curlzmxp*nva /o8m2ev-3 rents. 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 forano2 /vm *x38 elzmv-pce between the two wires?

  A long straight wire )rv5z y4buyipp6 4i i:carries current toward the east. A proton moves toward the ea4:iy6y4uir pp) ibzv5 st alongside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the pla -5 wrmqgtcusg ;cpkn779(6osne of the page carries a current toward the bottom of the pags6 5wu7 9nrkcqgp7so ;c-(mgte. 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 a horizontal table.fxytp -p)f 7v*uvwgx8kb)x-9 If the wires carry cx8v7wk-p9x ))vyxtf -upfb* gurrent in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the asf 4crr,2rs.(jo, i7wnwnx * ls6a2uwires carry current in opposite dsjc7la2 rr,*fwsxa4r2w ,.o(n 6us niirections,

  Consider two current-carrying circular loops. oti qu9(pj)2f*ex9ssBoth are made from one strand of wire and both carry the qo2jei ptxsu)( sf 9*9same current, but 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 circular loops. Both are made from one strand .kjw2 u,tso+yf ml u0h;jn(4fof wire and both carry the same current, but one has twice the radius of t(.h0 ;u2tymf w ,luksjjfo+n4he 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 when the angle betweengbj3xt. :(f qrght r48 the loop's magnethr .tqg38rtj b4g xf:(ic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop th/7lxxeg7;mg 8yz yez 30hca(wat is free to rotate in any direction will experience a torque until its magneea0gmw l7;ech3x/zyy7g z(x 8tic moment vector

  What fundamental fact underlies the operation of essentially all electric mot xthy.w.x9 f1o(x wu9clxp80iuoss89ors? wu9.wh 08x99t(opx sxi8sl. 1c yfoux

  A circular wire loop lies in a horizontal plannk(u6t wl7j;-nhdx20glvf7 m8s -fp ie 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 interactfw 2tn-skj l;0g-dv7ipm6l f7 8h( xunion with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is accel:nda10 jxq(-i/pj xo)pwz2. pz;e okcerated 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 magnetiapnekx.o )zdjcjq p io/2(-1 0px;z:wc 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 passbcd sqc n;pd)(y:i vc2 :xto3cga( )6ming 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 fc )(2icca6(:xb qc ):;s3mg tdvpdoyn ollowing, 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 electric field point?

  A 2.0-m wire carrying a current of 0.60 A is ) z3.sy1pc;gd 3 nxblaoriented parallel to a uniform magnetic flx .yb13d 3psnagz;)cield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directv jy sm(. fgib7;f6(dcion 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 meteq qn8f7cp+om/r on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an anm/pq8+c 7foq ngle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass4nchh+6 ick 8civ zmh47du( .f of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of the u6cc n.4vik( 78+hcmd hfhiz4rod?

  A stationary proton is in a uniform magnetic fielo- 1uu+ u6ph6 ldjxg-rd of 0.20 T. What is the magnitude of the magnetic force on thrhl 1d6uoujx -u+g-6pe 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 spe)k d6 jas4,gzi6 fnsw.ed 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 sr5laj*q qi e.2peed 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 w pe fho4ua/94zith 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 spee+f;,4tllit nsd 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 wichs3q .uw zkaust( gl:,75 ai8th a 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 acceleration of the electron.

  A proton has a speede-+vucj zs hc-s6/q*y 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.uq zavob5dt0g1udp 3 5g,a -;3yk/tb d What is the magnitude of the magnetic field at a distance of 0.15 m from the wire?3 10k5a5dga/gdo ubu vqpdy -zt;,3tb

  A high power line carrying 1000 A generates what magnetic field at the g,8zd;qvrdl dz0urg0nt+;q req.61 r h round, 1u+.dz; qh el8qdgrr6;vd q 1nz0rr ,t00 m away?

  How much current must flow fot b,2tqgthh7+ o/; syer $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wireae-d.h9y 9j lx carrying a current of 5.0 A is the magnitude of tx9y-d h9l.a ejhe 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 cavcboh. 1v6mt*u,pp 6trry currents of 10 A in opposite directions. They are pt6mbtv pc.,1 uo*v h6separated 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 cak+ joic u-yfy;r 7s(,sl q610 ynuwnr(rry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic fiely, ;skrwqcn+uo y(isr ynu(f107lj6 - d midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directiokql 5tve2udp+w6; .l -es 8zstns. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires tz+ v8eulq2s tk 6d. 5w-etsl;phe same?

  Four long parallel wires each carrs7g/2 jrv:ah t/2 ubity 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 thjutig b:/2rt/2h av7se other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in t hy7+hkn)5)tux* skt mhe opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wirk sxt5 )m htn7)yu*+hkes.

  What is the magnetic field at the center of a circular loop of wire of o5dw sr)u :lh)3i+wt oradius 4.0 cm when a current of 2.0 A flows in ior5olhu sd)tw3) +:wthe wire?

  A solenoid 20 cm long is wound with 5000 turnhvoj nd1 u(u()f;.md qs of wire. What magnetic field is produced at the center of the solenoid when a curren d(fu) qh;jvd(o.1 nmut of 10 A flows?

  A solenoid with 500 turns is 0.10 m long ayr )2pfcwte a9,jrx+1nd carries a current of 4.0 A. What strength of magnetic field will it havea ,p9r12rxy)ef j+wtc at its center?

  How much current must pass through a 400 turn coil 4l:v9hk/tlk dn(4saf5 .0 cm long to generate a 1.0-T magnetic field at thhl sf95knda(/v4t:l k e center?

  How many turns should a 10-cm longs.u :njtml*g-s3efvxsa81ks 0/+s q f 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 that carries 6.0v: 1gwh6uvlks1 g ,o5m;gqma0 A if its dimensionslgg6,s g 1o5h1vmaw: mqk v;u0 are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnpv5-evsk 4-lu+ 7jnvuetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetvjnkvv 7-4+- 5spe uluic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional0;cx.z yuyv) e 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 2ifesob:. .zr 2.0 A is in a magnetic field of 3.5 T. The loop has az.ief s b.2r:on 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 magnetig.)dde3g y z:xv4ooo6c field of 0.30 T. The current in the loop i.xd 4ozy6:goo3g d )evs 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 unu(zd. ,rq8 fryiform magnetic field of 0.30 T. The c,.r yr8 zfqd(uurrent 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 wire loop/rx .xw3f alf34p6 gjw of area $0.25 \; m^{2}$ 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 speed ofy2i arur. :dcaez,62t $1.0 \times 10^6 \; m/s$ 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 v7ky4,6w2*ca upiias aelocity $6.9 \times 10^6 \; m/s$ 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 potep.e/l qlwn. em .tuc01ntial of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radu0/lpel.cm .1 twe. nqius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a majw0js/. aykfj j-+ll4 gnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it f jw/4alf0l - j.+jjyskollows.

  A beam of electrons is accelerated through a potential differe1hwdq4:bt b drt)z-d(nce of 10 kV before entering a velocity selector. If the B-field o rth:4dt1dwbb)zqd -(f 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?