If the north poles of two2z)xca zl0slm,e--z (cu nfk7 bar magnets are brought close to each other, the magnets)eaclz -kzz(-m un,cs 07 xfl2 will

  If the south pole of one bar magnet is brought near the north pole of a z0q()vr .pxszsecond bar magnet, the two magnets wil sp vz.rzq0x)(l

  If a bar magnet is divided into two equ0xntnm f uez(g8s)j 7r zcx6-(w-i*fzal pieces,

  The Earth's geographic Nl0-d;jud: p -o-vgomv orth Pole is magnetically a

  The south pole of a magnehl l:2cbl4y su ld-xa,p*l7g +t points toward the Earth's

  An electric current :plww,a-e,l zproduces

  Which of the following :x*i02n :u p2whptxd 0rt;fnkis correct?

  A vertical wire carries a currena)5tlk elp hr2v.1 cm:i+ x hhj0lrm8(t straight down. To the east of this wire, the magnkc(v l5.mi:a0 h jl h+mpth)8l x1err2etic field points

  A horizontal wire carries a current 8wp4,iyeihi ra 87.ie)d k m*hstraight toward you. From your point of view, the magnetic field caused by this cuw8yek)hir784 e*ih, .mi piadrrent

  A current carrying loop of wire lies flat on a xhe)haukys/)0bspja*s 47* btable top. When viewed from above, the current moves around the loop in a coun*ab jpauy*) s s7b0/h4xsh )keterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circk2 n k;ew94 c:kxdib(tular loop of 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 b: k ikbx(4td;9wkn2ec y this current, inside the loop? The magnetic field

  The SI unit of magneti2zjy jq;1emh 2c field is the

  1 T is equivalent tosb42 2bq,mwdx6h ,kp ;)imxqi

  The direction of the force on a current-carrying wire sm9i ge,o/4 kjin a magnetic field is described by which of thejk ,/m4gi9eso following?

  The force on a current-carrymhwj-gl8c w :.ing wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zeqj 91pn ;vo3fzro when

  A vertical wire carries a currenb4::l z2wwnvut straight up in a region where the magnetic field vector points due north. What is thevub:lwz 2 4n:w direction of the resulting force on this current?

  A charged particle moves and experiences no mc3 5aphpyd*ita(4 iyk h t3 68qr.ikgq1n) x-tagnetic force. From this we can conclhq qk)khac in gptp53 a1(*i4 txid3.-6t8ryyude that

  A charged particle moves with a constant speed through a regior*s+ jw tj a3l(qd/w3icw;0j un where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting3c* +ju3ra ;/( diwswjtl 0jwq on this particle will be maximum when the particle moves

  A charged particle moves across a constant magneti;ho/5k5 utm 7 jnhdi4vc field. The magnetic force on this particduhvko4h5/5 ijn mt7;le

  A charged particle is injected i r6m61 p2)nww5efxs xnnto a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, m2wxerx 1ns)p5wf 6n6 the particle will

  A charged particle is obb 2 we1:wb;8fks ( wyfb2hw,tyserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, thw(1w2 hksfbw;b ebt:8,y 2f wye radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a un3er : r;i tk*3ww1jymgiform magnetic field1 wmjkg3e:r*3ir ;wyt. 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 at speed V in a uniform mx+0d twp4bn i5agnetic field that is directed straight downward. The magnetic force that acts on it iwbn +dx 5it0p4s

  An electron has an initial velocity to the south but is ez dd9sx8f8 w,observed to curve upward as the result of a magnetic field. Tez88s dxdw,f 9he direction of the magnetic field is

  An electron moving along the +x axis enters a region where there isg6x;nf 9a q-yb 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 page.ba 6;9xfn -gqy)

  The magnetic field produced by a1/hi25 s:djfpav nw4 r long straight current-carrying wire is

  At double the distance from a long current-carrying wi+mabor l )9pu jqi(81 0zfybc4re, the strength of the magnetic field produced by that wire decbyl9c pq0mzo(1)uf 8+abir 4jreases to

  Two long parallel wires placed siq-8i cd5i0jzbd0v2- xh*nwi * mp9ttcde-by-side on a horizontal table carry identical size curr cqn2it -bh95 d0jxdiitzpv0w*8m-c *ents 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 between the two wires

  Two long parallel wires placed side-by-side on a horizontal table car hzw p0f* u;b:uu7gk8nvl:n kp:a2) uery identical current straight toward you. From your point of view, the magnetic field at e;fun lb:k8pah7 2u:unvkp:0zwu *g )the point exactly between the two wires

  Two long parallel wires carry xs jh+(p b9rwqqyi.)7e36j w requal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What isq+ )p6j iqj ws b(3xewrh9.r7y the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proou:+ec 098ebm rdj4:ufrp 0 slton moves toward the east alongside and just south of the wire. What is the direction of t0u ospm j8blu:e9 +rdec0:fr 4he force on the proton?

  A wire lying in the plane of the page carries a fm,w 9tmasl -)current toward the bottom of the page. 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, fro) -mtfm9 salw,m your right?

  Two long parallel wires are plaxz. .u3 a2glrnjkmfr; 1fc;g+ced side-by-side on a horizontal table. If the wires carry current in the same direz 3fn. r+a. 2fmuk;1g;grljcxction,

  Two long parallel wires are placed side-by-side on a horizon+fw;p z. z z(pjo8yavfo9f)im. xnp0rwk 9r-.tal table. If the wires carry current in opposite directions,-r8r;zfn .pmpj zfx9a.k.pwo izf)9 +(vy0ow

  Consider two current-carrying circular loops. Both are made from one strjv.i/ i.rd5 a cnkz2k:c*gyu 0 s8 6);wzbkxvjand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnet;c.6b c*k5j8w)xjdziiy2 rau:/vk gz knsv 0.ic 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 , nwu5.ml qtvnwsbfs,6hdc4ih 5 f/0 3one strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magn/4b.it n cshvlhn f5u6m,5w0dqs,wf 3etic 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 between0n9kp 5jaf8i b-n xt0l the loop's magnetic moment and the magnetic ffbn -ljx9kn0pi0ta 85 ield vector is

  When placed askew in a magnetic field, a current carryin8,9q7i v cpkuawjf1*tg loop that is free to rotate in any direction will experienc,jtwp *afi v1u q98kc7e a torque until its magnetic moment vector

  What fundamental fact underlies the operationo7eiqm* -)8ibv eqtq- of essentially all electric motors? q evib)ei78mto *-qq-

  A circular wire loop lies in a horizontal plane on a table and carries currenttf11as)s qjg* /av 0iz in a c1 f/ sa1qvsgaz0j)i*tounterclockwise 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 m and charge q is*p/8p v hzs(6jtsn0r7p) r yoi 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 papp*irstj oh(7 80v6ny/ )rzpsrticle. 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 passu.uoq ;6ufv x 2m.s/gwuf (j0hing 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 2os; fu.6/uwj(hx. m0 qfvuugto the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uniform mag3c jw)zk 6 /;auzxibh)s a*qo1netic field of /)a*hao jz);wbuz s361qkixc
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directiob+p3 od ca;oz3n 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 st((qp d vqynn*-raight wire carrying 5.0 A when it is placed in a *(n dqp(q -yvnmagnetic 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 a mass of 0.05yn scb y0*2cb/*cap ;4/:ld,aegfns z ft5-k d0 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order fdyk bcl*ps0 gs:/tb,e*;2an c4zcfaf5/ny-d or the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of ujxgva1jtxa g 6/admw). t j u/(;fv070.20 T. What is the magnitude of the magneti da7t/a)v0a 6jg; xmgx.u/1jwfu jvt( c 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 speeve4* f 128 jpu:8baa,zme e(ani3 kvmld 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 a0pckn 1c(banp5i74 yz 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 norn0/i .,djkfo5ljb.kd th 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 speed of)h,; a2peqgqd. jtl7+dscfs 4 $8.0 \times 10^6 \; m/s$ 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 b 2fwc mbq1+//o1o pera 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 speedtzoiaeq8( 6uo)li+s1 ; 2j+ hqdiri: w 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. What is thk wz d9rhv)3 zj4)6ubhe magnitude of the magnetic field at a didj 3w) u4b) 6hrzv9zkhstance of 0.15 m from the wire?

  A high power line carrycs s7huq u ;j4y7 /wl,j0js0dting 1000 A generates what magnetic field at the ground, 10 m away?/y 40 q0 ,hu7jlsjscud;7jstw

  How much current must flowqij)+2g c j vtauud4 1u-0imu( 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 v97kt1( yx,r mocq3ovj92tx t wire carrying a current of 5.0 A is the magnitude of the magnetic field due to thty1k m27xo3jct ,oqxr 9tvv9(e wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires ca qeap)h/t5r3 utv:c1n rry currents of 10 A in opposite directions. They are sepatvpr1ean cq3)u 5t/h: rated 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 carry currents of 20 A and 5.0 A in opp h n5a6(x9(+npmbxdwvosite directions. The wires are separatv nad69xp( h+wm5(nxbed by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dir+e e.hojm0u)ue6 rc.2ikro5m .oi o; xections. The wires are separated by 0.20 m. At what point betwe;r)o k5meh0o.xe+2em..o ij riu 6ocuen 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. They)jlmx o adz 7m5.0icx8 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.mxc) i85 al7j xzom0d of the wires experience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite d*:hi lkk0 nw)ifr 4 t/c8coug.bv: :sfirection. The wi u4 ckvr*w.:8 kig t:nofic s/lf)h0:bres are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center ofd87etp4ne 4fa-a vv8 g a circular loop of wire of radius 4.0 cm when a curr4 -vd74t 8gaev8afnep ent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 cpp)fx er5f) /k)ttu:turns of wire. What magnetic field is produced at the/tp)u: x5cff) krt) pe center of the solenoid when a current of 10 A flows?

  A solenoid with 500 t r,s:7,x,txa5itfq biurns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will itxti :ba ,f7ir,s tq,x5 have at its center?

  How much current must pass thr *w +cgrk,fl toy8)kmai:9 (bsough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at ti :8 )ols(wack k* rfy,g9btm+he center?

  How many turns should a 10-cm long solenoid have if it is 7;fc(scw 3 xi m(ef(jtto 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 carrie.61s 0cbntypu s 6.0 A if its dimensions are 4.0 cm ptsnb0yuc. 6 1x 8.0 cm?

  A circular loop of wirfg 0 lka5,6d:7uscj :r s5io .kya+akae of radius 0.50 m is in a uniform magnetic field of 0.30 Tg k.rka,aif6 c ydk:5ujo7l0aas +:s5. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wi4 fnf; pvl:*0nda+s yvre 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 a current of 2.0 A is in a mcomcs89a/xya*l +: gz agnetic field of 3.5 T. The :zcmasolyc8/*a 9+g xloop 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 wire of r c3bdxlmaf.) .w:ak .qadius 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 p.kx f. w.mbqa)al :dc3arallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a ung u3*ggmct+o98g k t*u9e.pcldmk2-w+oe k5niform magnetic field of 0.30 T. cggkt9m5 k98*e3uu+tgl+*2nowp - mkc e od.gThe 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 wire loop ot e, z8yt9b.dyv/xu7z f 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 (chbf v yt,kejko07g+tkq571(kr arge 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 witf1u3q1 5qfo+v 6 hy82n h7wqd.cu1 psuwiym4 hh 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 then moves into a zfh hqdfo/7p/7 (;wpqj q3xj/magnetic field of 0.040 T. What is the radius of the protzxqh ;dh//q7f o/pj 7w jfqp3(on's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of,eg 4:b:p6s (b fjd(pti5nevs 0.30 T oriented perpendicular to its direction of motion. Determinese( vg (b:se dif4bj,6 pn5p:t the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference o j3 o,t,;c04qtjwsy vbf 10 kV before entering a velocity selt,wt ; 4qyb0sjov c,3jector. 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 to be undeflected?