If the north poles of two bar magnets are brought close to each other, the cpppcp. 0g e-y q29j8tmagnets wil9jtp8c0g-pc e p.yqp2l

  If the south pole of one bar magnet is broug+g ,dz0 2yb *vzbcx5whht near the north pole of a second bar magw x5 cy*vd2 h+bz,zbg0net, the two magnets will

  If a bar magnet is divryy:ynov +9r5 by5va(ided into two equal pieces,

  The Earth's geographic Norty 5m64 kf2ivsxh Pole is magnetically a

  The south pole of a magvptq ,g7,fo; dnet points toward the Earth's

  An electric current proe-xc 04d+qp qwduces

  Which of the following is cor.p1q(.s6egcxd+5 ca (cdcrjk2wf(ftb 1g) fmrect?

  A vertical wire carries a current straight down. To thx w2o5sl -w.7osrobo,e east of this wire, the .s-75 o ,swbxoo lwo2rmagnetic field points

  A horizontal wire carries a current straimt 9u*8/jm)i.3 ymc5aaxh (mtj)dwc h a64ba qght toward you. From your point of view, the magnetic field caus8mid3u4mcj*mtjyq w6a)a bc. a9/t(m )hx5 haed by this current

  A current carrying loop of wire lies flat on a tablekoxs tl1fp (x5(ykz:nl7m,m; top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is thex: mmpzn 1y(lok;kst(xf ,l75 direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of ,ifx55ivbrjv.yuv /4 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, inside/ v,i5ru.y5vivj 4fb x the loop? The magnetic field

  The SI unit of magnetic field is +jz-7-k ovobw7 /ps,sjoiv7wthe

  1 T is equivalent tolnuej0bc ylm,r5c,) ( tm/:cb ghtg; ;

  The direction of the force on a current-carrying *o3b ekf roe90wire in a magnetic field is described by which of the foo390berek *ofllowing?

  The force on a current-carrying wire in a magnetic field is the strong* u5:l8wydd9s mh3w a5s ycaa6est when

  The force on a current-carrying wire in a magnetic fielz/kgeb/ bq 6ttakwe7t a( h10vb/k0 0ad is equal to zero when

  A vertical wire carries a current straight up i6(tmwb8 f m*a4 9xgg-n7s yij /5ratqwn a region where the magnetic field vector points due north. What is the direction of the resulting force on this ci a4gjt6m9r qgf7(tx5w nm* swb/ya-8urrent?

  A charged particle moves and experiences no magnetic force. Fromw, lweak4. )z-/f ;zllzd7 mqz this we can conclude th z ,z a;7./ ellzqdwm4z)wflk-at

  A charged particle moves with a con)abo j3qrdz,60 nbtb- stant 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 maximum when the 6 , aztd0bq3nb)jb-orparticle moves

  A charged particle moves across a constant magnetic field. Ths80ji 9ywz2fv 5 iinr4nzp/z0e magnetic force on this particle5/zw p004 2 insr8zn9ijzfivy

  A charged particle is injected into a uniform m2dse3o zw x3v x6e(dc5agnetic field such that its velocity vector is perpendicz s2(3v5x cx6 de3owdeular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in lmqn )j) o:1wt*a; daua circular path in a uniform magnetic field. If the particle hadludw;*) )majo:a 1ntq been traveling 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 una 6 u08jpwcy :02i xl2pmys+wuiform magnetic field. If instead the particle carried a charg+w0up:a 2wc x6pi28j 0uysym le of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a unifor kwoa5p;x.m.q m magnetic field that is directed straight downward. The magnetic force that acts on it isk;5 qx.mo pwa.

  An electron has an initial veloci o5f;tys)*y0i sb w-ox7g0afvty to the south but is observed to curve upward of 50y* -xwistgb aovs0;fy7 )as the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where there is a unifxc ;3vbux+5u ydko)y6orm magnetic field in the +y direction. What is oc5;6udy+b uky)v x x3the direction of the magnetic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced xtyx.it t11ecs 0 -m7iby a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, them2 q4wdz 50ylz strength of the magnetic field pro40zlzw5y2 dqm duced by that wire decreases to

  Two long parallel wires placed br81,g,nhr yaside-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 on your left carries current away from you. From your point of view,r8 ,rnbg1h,ay the magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed si r x. u3vy4we9g(vrp-pde-by-side on a horizontal table carry identicaxp r94.ypvvrgu(we3 -l current straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wirzs f7mnh3 vnoal.1 s-/es carry equal currents. The magnitude of the force between the wires is F. The current in es a 7vh/m.l n-1ofnzs3ach wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries currd,o ;l.p l1r6qutx) gbent toward the east. A proton moves toward the east alongside and just south of )ptxul go ,;q61dbl .rthe wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carr 3s l/b- kk+tbtfz8bmb ny5(o+ies a current toward the bottom of the page. What is the direction of the magnet+bts k/b8tnbm -+okfzl 3( 5byic 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-b4 6 v5wfzgcu)hd4j)e jy3t 73d t;l 6szdvf1mfy-side on a horizontal table. If the wires carry current in the same fdjdfc;4s 6et34vvy1 6tmfud)53lzj z g )7wh direction,

  Two long parallel wires are placed side-by-side on a ho-koixa + , 3iczc gul9am5(+rfb1gd3 frizontal table. If the wires carry current in opposite direo (53z1rgldf,b ii+u3c mf- +agk cax9ctions,

  Consider two current-carrying circular loops. Both are made fro59sc:/7v7cshmf-zf i7e5jw h /hlw alm one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetm7vj:-elshf hcw cf9hila s w 7z/5/57ic field at the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circ.l. 0boymo dj)eu 04a1ey h.h.l( aezgular loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Compay1 h .baeu). yhoj 4e.o0me(gd.a ll0zred to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a currentmk+7ci.n /czv carrying loop occurs when the angle between the loop's magnetic moment and tzm nkv ci.c7/+he magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is frl1a6ucy(g1 ah ee to rotate in any direction wilhau1lg 1(6 cyal experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essent539 q0fj yvjetially all electric motors0j9tj5 3ef vqy?

  A circular wire loop lies in a horizontal plane on a table and carries current z ue0dyz4 0j007ium ouin 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 tzomj7ed40u0u iz yu 00he 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 m and charge q is -kgfp5 / pugd4 i2hfx-d(cfy7 accelerated through a potential difference V and allowed to enter a magnetic field B, -c -dy4/ 7hff g(g52pfiukdpx 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 the particle in terms of B, q, V, and R.

  A velocity selector n6x)eras-bgcf (o k( +consists of a charged particle passing through crossed electric +6sekgfba ) n(rx(o -cand 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 electric field point?

  A 2.0-m wire carrying a curren0e15/ tgp oqe i:xun5kt of 0.60 A is oriented parallel to a uniform magnetic field ptkui o 1q:5e5enx0g /of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currop/8c4a4i ez zarf9j l;t8a1dent of 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 meter on a straight wire carrygd p 1q 4dlo7bql4wd(;ing 5.0 A when it is placed in a mag4lw4gb1ldo d7p;d( qq netic 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 m long has aso;sv *n2w80 nhdyy :*ejg*i o mass 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 *do80i*wgh*oe2y ys nv; snj :rod?

  A stationary proton is in a uniform magnetiju/wgz;or hpp1 u6yi(gns h(7m k)7t9 c field of 0.20 T. What is the magnitude of the s(u u)( 6z/7j ;g1r mpkogt79p yihnhwmagnetic 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 7tlv(el .q*pvm6 v 6:zzkqem4speed 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 etkv6hlka)-b(7 :zat 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 du uc)ef0o t.p eh*tb).vbw2(bme 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 spee/+x(z ecf bygs( yh4o*d 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 wi-m; skfd98+o , :7clerbmjdwwth 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 speed ofc6170 c qnxj(-dh7ww)pt 0. k udzfgwe $3.0 \times 10^6 \; m/s$ 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 tsqs(;n ,pr1sui ((-vvlnkch:he magnitude of the magk(1ls cnu: srvs (h(i-;qnv,pnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A g;xh1hg a u2f8fenerates what magnetic field at the ground, 10 m awayh2a f;8x fguh1?

  How much current must flow forv5 t n7h:a8lq5 z4hjit.6em*6ltmu k w $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryin,kldubfd wb5*yh g0*7y; )e rbg 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 fieldydb7e gdb w,;l *0 ur)hyk*f5b of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directionst:xafn381q bu. They are 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 and8 t:1xb3f nauq 60 cm from the other?

  Two long parallel wires carry currents of 20 A an+47hzfzutq 8dd 5.0 A in opposite directions. The wires are separated by 0.20 m. What is t u zd+7fzhqt84he magnetic field midway between the two wires?

  Two long parallel wires carry9vmz)i by-, bcgou1(h currents of 20 A and 5.0 A in opposite directions. The wires are separa9uo cgh1, zb)-mb(iyvted by 0.20 m. 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 4xe xwf8,) ibhmz*3 zi1 vjm1/yjjm( idirection. They are parallel to the z-axis, and b3)hiv,1 jzjemmmjyx / 8fii14 zw*x(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 the other wires?

  Two long parallel wires carry currents of 5.0 ce uyu gi3q9r a j6t8;w.k,:ubA and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between . u,euj6 ; yqwrc98i:uktab3 gthe two wires.

  What is the magnetic field at the center of a circularj gkf skuv)r( cu580c. loop of wire of radius 4.0 cm when a current of 2.0 A flows5vuc0kj c . gr)ukf(8s in the wire?

  A solenoid 20 cm long is wound with 5000 turns ofcz8ldfl j3 o48+ nyh;w wire. What magnetic field is prodf4y8hlco ldz+n8w;3 j uced at the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 3 hb 4i(ckjzax6.otbz95cs*t 4.0 A. What strength of magnetic .6cb3z4ta z(ox *jsb9h5 tikcfield will it have at its center?

  How much current must pass through a 423 kif ym+ba3pruw)ch 50b p5n00 turn coil 4.0 cm long to generate a 1.0-T magnet3)ypra2bw+fi5 pc un 0hk 53mbic field at the center?

  How many turns should a 10-cm long solenoid have if *3 fmw ox)2pzd0fre5d 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 turnsecpc8 -sa9 */ w)y,nyzv/buyh that carries 6.0 A if its dimeuv /c )8pya*9e- /ny by,whzcsnsions are 4.0 cm x 8.0 cm?

  A circular loop of wire of ni fz.jo*+ v2xradius 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 torque when the plane of the loop is perpendicv*inx2+zofj .ular to the magnetic field?

  A circular loop of wire of cross-sey/si7:smp kkiw (c. 5ectional 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 isd8 8 rg9mlwig6 in a magnetic field of 3.5 T. The lo8di9 gmgl r68wop has 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 wi2xqh2w rbb;8 ire of radius 0.50 m is in a uniform magnetic field of 0.30 T. The currentrhq2 ;2wi8bb x 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 un)a0iyxbdyj r mi3: d;r2m -l7liform 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 magneticr3ldd 2 ;7j-i y:biyl0) armmx field?

  A circular wire loop of are frm;kb-sn p2*a $0.25 \; m^{2}$ 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 ofih vkk-m s1*x) $1.0 \times 10^6 \; m/s$ 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 withux6dbs mrszq -dz 2 kc(/it15: 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 thu9 3lpgmfw1 tgu11+9a3nye /pb6yrtp en moves into a magnetic field of 0.040 T. gy93py 9 ub13 w/aru+tfpegp1nlt61m What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest ndz z4u(tp0)jthrough 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it jzz0 pdu n4t)(follows.

  A beam of electrons is accelerated through a potential difference of 10 kV5g :/4ioc:fl fu ,2i)dgfgwcz before entering a velocity selector. If the B-field of tc igfugiwof :g)c:,25df z/ 4lhe velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?