If the north poles of two bar magnets are brought close to each o2 ; /usaazlb ttxq276cther, the magnets7xa s2atbzl;/t62qu c will

  If the south pole of od1,0a7nrb mz9dbc5sn(ks g 0h vl)/je ne bar magnet is brought near the north pole of a second bar magnet, the two magnebkz)1 ,hjmrl5e 9g0 nbad7 d(0nssv/cts will

  If a bar magnet is divided into two equal pdcd /f y8uz 0dvp;/hh2l)tz)t ieces,

  The Earth's geographic Northjety( q7 0)afg *ovo) sk 4v-ae*iib3b Pole is magnetically a

  The south pole of a magnet points toward thth3:20sf u wxbe Earth's

  An electric current prod7os8hgqq7;qkj +t6 6ey i kp4muces

  Which of the following is corr,13t* xobkgp yect?

  A vertical wire carries a current straight ii,oha8wt c-n*y :.zpdown. To the east of this wire, the magnetic pc.8iyh: twona*-zi ,field points

  A horizontal wire carries a current straight toward you. From yp/ dg6:r ;dwjlour point of view, trjw g6 /d;:dlphe magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When w1,*)-ynwhxaah 7g 3eo mrs n:3 /ycqzviewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? ewc:,ny1sgm *w7a n ha3-xqy /)rzh3o The magnetic field

  A current carrying circular loop of wire lies flat on a table top.owblaae/j kmhf23a1)ew jgm iv* )041 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, insid*4mbw/vh 0kea) jim)w 13ajego f1a2le the loop? The magnetic field

  The SI unit of magnetic field is the2,j l0p 0h/xqmeco;d ddeq )4x

  1 T is equivalent to5+ ; a,gat(a2qz)vjlp bvtc1ruq3k ;l

  The direction of the force on a current-carrying z3t)lmx:2b ri uii)q6 wire in a magnetic field is described by wh)u:t m 6ixlq) 2iizr3bich of the following?

  The force on a current-carrying wire in a magnetic field is the strongesrr 1vt3kwi8dl3 m p+t3t when

  The force on a current-carrying wire in a mage i(.(z dbhtp) bfju*/netic field is equal to zero when

  A vertical wire carries a current straight up in a region whpijg1zwqzs4x6 8j 13s:o 4t ueere the magnetic field vector po ut143jqp j8 gi1z ezsxso4:6wints due north. What is the direction of the resulting force on this current?

  A charged particle moves andhrs7u /4a *qet qli+f4kp pm17 experiences no magnetic force. From this we can conclude thl4k eht/pru *q7ap 4miq+sf 17at

  A charged particle moves with a constant speed throuinn 3*zl)y/ ddfzc6q bk, ilt 7m5)9ufgh 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 theb n,zkq l9* i6fimlf)5z dtcu3 dny/)7 particle moves

  A charged particle moves across a constant magnetic field. The magnetic 0lj 4+e2a wk d5pny nni07:atloocc43force on th0 nye0 i43 lcdj+wt4p7o laa52 n:koncis particle

  A charged particle is injeckb8wii- y 1b*pzqn+;xmmg ,1hted into a uniform magnetic field such that its velocity vector is perpendicular th,igpx kbi*zqnb 8 ;+y1m1-w mo the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is 6e7 2: t3t h*gpkqiwspobserved traveling in a circular path in a uniform magnetic field. If the particle had been tr q7p3 6p2ih:sktw*egtaveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a yq7i k7t. +u3gfev f,il3lxn1circular path in a uniform magnetic field. If instead the particle carri3i yk3ul,7x 7. 1+nqtfv eilfged a charge of +2e, the radius of the circular path would have been

  At a particular instant, an elect593 +xnpyw+gvul -pavron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force thatp 9-3g+5pw+xavvy nul acts on it is

  An electron has an initial velocity to the south but is observed to c u0gg:s8ajlcyne1 bqpy18- 9furve upward as the result of a magnetic g:n0g8yyc9up1 18 s fj-abelqfield. The direction of the magnetic field is

  An electron moving along the +x axis enters a region where r/:pnc a;d2q,wt pvkfhp 7. prmt ,8x5there is a uniform magnetic field in the +y direction. What is the directionrx/.7tt8 ;2, pfpnkqc:pp rm wa5v,dh 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 current-cb 2jn 3)vuznkrdsi 4;9;ui 6dxarrying wire is

  At double the distancegw12zfuz: bz/ from a long current-carrying wire, the strength of the magn/b:zz1 fwz gu2etic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a h9ionzq/-zwalnxq a 1 qy,1*3zyt/wh4l26pndorizontal 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 midwaz9 oyn az 32*/inw/zhx1q6qqltw,1dp 4na- yly between the two wires

  Two long parallel wires placed side-by-side on a horizontal tabl-d cb0rwjbwnro* 4*)ee carry identical current straightr*on-berd0jc4* bw)w toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude m,j7e8rs 8 -xqnqi 5xmof the force between the wires is F. The current in each w7r5 x8x nj,qime8 sqm-ire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current towa;sv2 fceey 7*zeh7- l n),mycfrd the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the proton?e,fvl yme 7 y)-n2*ezs 7;fhcc

  A wire lying in the plane of the page carries a currenzjppq8 9j.kgd( :gipzr,a3( mt toward the bottom of the page. What is the direction of the magneticpzipg , qd :g .3(mk8jpr9(jaz 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 plactpvc4d1o :i5qed side-by-side on a horizontal table. If the wires carry current in the s5qpt :co41vi dame direction,

  Two long parallel wirez7h401i7 r jeaw3o orqs are placed side-by-side on a horizontal table. If the wirjirz3er71 oqha740 o wes carry current in opposite directions,

  Consider two current-carryinggn 7pn.0zaqfc5c q,4 k circular loops. Both are made from one strand of wire and both carry the same current, but ok5 pg fq7.nac,q4nc 0zne 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 wo/gp (m.u n7fcircular 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 smaumo.fp(g /w7n ller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when -tq6 b7,wmm 3:msjasathe angle between the loop's magnetic moment and the magnet7t :36awsbsa- mm ,qmjic field vector is

  When placed askew in a magnetic fiefn.xs g5;s6kir5 pml2 ld, a current carrying loop that is free to rotate in any direction will experience a tks5ri;xl gs m.56f2nporque until its magnetic moment vector

  What fundamental fact underlies the operation ow 7 zg lkz;)kr vzt)ivcyq*n/;7-rhh4 f essentially all electric motors?vy krczg7))i-r/4kv tn;h z*zw7h;q l

  A circular wire loop lies in a horizontal plane on a tablasd94i .j miz(t7q :otcos6*kr(u ku2e 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 interaction:4r( qzu.kcoa*(ois2m sd7jt96ki tu with the magnetic field?

  In a mass spectrometer a particle of mass ma;9u (d9u pmkvx6pex6l7 :cqm and charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected;k u m7xp9xm dc:6eu(l paq96v 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 consists odu k (qy44zp6/ wle 58 -nzg+m+tpztktf 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 eaw8t +d-4lyz4+65z/muz gk pp ket(qnt st, 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 oriented parallel to a uniform mt(wu:qpgv61/- s fymhagneg m:(u 1-wqh/6fystvp tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a currql*8m+gc+o 3qy4gog eent 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 carrying 5.0 A when it ogka+u)/sbsm*p t dp/z; 3ib.is placed in a magnetic field of)ipd3.b m zg/s;tks/p+o uba * 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 0.050 kg and is in a magnetic fbh+2:e y 9v yrnd(5apgield of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weight of :(ep59y ndyrg hb2+vathe rod?

  A stationary proton is in a uniform magnetic fieldhox /ao*i8dw 865iwc p of 0.20 T. What is the magnitude ofo58dwwoa8 ipx/c h*i 6 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 kljf4,)oxo6 0uk4 tdkshc: 2uu+qlicp y/7:rof $5.0 \times 10^4 \; m/s$ 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 jlz t8c z+bzwp)cwkn5 t76n7 9speed 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)l(qb3.)dy2p tfnu lc 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 witpvef e x2i87p3hzn6 g;7u .mnhh 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 magnetic force of the electron.

  An electron moves with a u v q/0 /u/aftz5hqk6kspeed 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 of8zt)x b:u:xjm kx .z -ava nmtc+)mw/) $3.0 \times 10^6 \; m/s$ 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 wirr c;tss/23* ivrr 7ad -7i x+0wm.mni uaou)uwe carries a current of 25 A. What is the magnitude of the magnetiu)s0 v3.ru7-iw + d7a cmma i;s/it2w*roun xrc field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generq2 fs6iu cwmx qzdwh 9pjzw ,ip:/5v560;cf0zates what magnetic field at the ground, 10 m awayziip wf6 d/cwuz0wq9x f :h25zm5p0,vjqc6;s?

  How much current must flow fhis4oiu )lx (,or $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a currev16+u7cly ib*sy7) 9-wuf/p;pi k* vg mlveuqnt of 5.0 A is the magnitude of the magnetic field due to the wire equa*+7*cl6i7pf/ y-u1 w lmeuki) subvy;qgv9pvl 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 opp+ijjp qtu,l4h-l 3 ;agfwyu ,,osite directions. They are separated by 40 cm. l+w-pq aig3j;hlu ,4 j fy,ut,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 ofw4 bah: sap;)rt c.t8t 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wirptcs:)aw.t;ta h8 b4r es?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite directg-:hwfw) fhj8-p;h:sfdlug0 ions. The wires are separated by 0.20 m. At what point between the two wires are the cong:su -0plf-8)gjw dhfh; whf:tributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same pi0hchj39ejd8ck.(jtv93oc direction. They are paralle c9jj.pv3k9hc (i8o c30 djhetl 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 the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite directhbb.. : ka*a0 en/ctlmion. The wires are separated by 0.30 m. Find the magnetic force per unit length lbabt na*c keh.. m0/:between the two wires.

  What is the magnetic field at the center of a circular bpa0en o5 y;brg-(g+ qloop of wire of radius 4.0 cm when a currgnbb;q0 5(e +gy-r aopent of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tuovb6huftu7gs qq/vkl2 keb,9.s+ ,2p)es 0qc rns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A floo2sbqsku/quve sh.7,)0c veplqb 9g6f,2t +kws?

  A solenoid with 500 turns is 0.10 m long and carries a( h:nnhy ; h8bvqwyx. iu2o;v; current of 4.0 A. What strength of mag hn8vhyb n;ov q.;:(hyx2iw ;unetic field will it have at its center?

  How much current musqcuvon*me/19kt i:hc0njz7, t pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fie ,/710uzknh9m ejq:cc*io tvnld at the center?

  How many turns should a 10-cm long sollamb).1wil)1w l ulp 0enoid 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 rectangulaog) pwqr)+9-cqixt8 o/v f+r yr loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 vtiyor) -8o+)/p c+9 qxgrfqwcm?

  A circular loop of wire of radim.t2jm nf(p y,us 0.50 m is in a uniform magnetic field of 0.30 T.2 pjt,y.n(m mf 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 wire of sv /t76 1um8ox jg- .8jiuslspcross-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 curreng2em7d4dg-m n t of 2.0 A is in a magnetic field of 3.5 T. Thee 2gmdg-dn4m 7 loop 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 radius 0.50 m i 4cm aypj2ycfo4q t*(.s in a uniform magnetic field of 0.30 T. The current in the jt. cfa*com4(q2 yp4yloop 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 fieldk zd(k4 qxhlhq:*9 go0e us/:y of 0.30 T. The current in the lolho :sz9k/ekdhx4 (q* yqg0u: op 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 otwyu,lt zmwz(m7 /ssnob f4c;,6z )g1d8 p t(ef 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 pa3song8n (7 sxu5x8y cd sj/gho 4 63ble*l;pybrticle (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 velosbyao jv)r +bs,i94 x6qf6z;xcity $6.9 \times 10^6 \; m/s$ 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 fho+uq8jml:lqk u(.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the protonku:( 0+l;q um 8hqoflj's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field ofz n,3nv h;uv*j 0.30 T oriented pe,jnu3;z hv*vnrpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV pib1ixo tm 09/9 jnyjmjzcwv3z c548,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 i8 zopm9bic1yn3c vx/jm5wj, zj t i490s required if the particles are to be undeflected?