If the north poles of+qcr rji;5c0n ffo 3,q two bar magnets are brought close to each other, the magnetsqcjn;0 ,c r3o+fqri f5 will

  If the south pole of one bar magnet is brought near the north pole of a secondo ;cj 2*esae,d z10oog bar magnet, the two magnetgj,o*ea dsc 21oeoz;0 s will

  If a bar magnet is divided t1ac.o vpb:7p into two equal pieces,

  The Earth's geographic North Pole is magnetically(: v0/eefshs/wi mdcw )wr rg+l+9j2n a

  The south pole of a magnet points toward the Earth';vh7 wdkuzlk4b ibvs 1:b,2r*s

  An electric current produced5vq nrbf92 nnii*g-t8h 5or4 s

  Which of the following84v7vo lzlv e e7/t.xu40bmit is correct?

  A vertical wire carries a curt:zwxt2+z c; urent straight down. To the east of this wire, the magnetic field point2;uzc:+txwzt s

  A horizontal wire cam hks6tiy +qt0r9i09fay*l h 7rries a current straight toward you. From your point of view, kyl+ia r 970m6 9hhftqi* ts0ythe magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. Wha q -t)bqr+zi 4:/kgoven 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, outside the loop? Th q +aigrvt:)/b oqz-k4e magnetic field

  A current carrying circular loop of wire lies flat on a table top.j,mli. 5,vs /vbyp1d 8xqerj* When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field causedvi,e5q jysbd 1x/8j.,*r v mpl by this current, inside the loop? The magnetic field

  The SI unit of magnet2) cq.xgv sj;(vd*:htwm iy1z oq-h9;xdv 8lvic field is the

  1 T is equivalent to w 2x3 n6e kcphb;8zlx,vl4lcto5)4xa

  The direction of the force on a current-carrying wire in a magn1pwtxsn5 * sm4etic field is desc wmp15*x4nsts ribed by which of the following?

  The force on a current-cardu.u9+)tqtd cj 8 n2hdrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic fiel2gnna tov )a42diqs.f di 1ld ze;8(n6d is equal to zero when

  A vertical wire carries a current straight up in a region where the xk -*djhax1yaystcte xwo: s03rv h(;477y/ emagnetic field vector points due north. What is the direction of the resulting force oovh0714er/(*st:h eyx y;j xsa dwax c k37y-tn this current?

  A charged particle moves and experience 1j6/ t skmpc*t9 vz70uiz6zmys no magnetic force. From this we can conclude t i 76y9t j/ sm*zukv0c16ztmzphat

  A charged particle moves with a constant speed through a region wl2cix02. y/ jhp l/xnyqc)+*xzkna n-here a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this parti xaynl/y)cln/.+n hck0*z2xq-jp2 x i cle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. Thtn:5 zfu up ;kmv2 )-(3lfbwgae magnetic force on this p)2:pu b;t5wau(lf v -mkngf3zarticle

  A charged particle is injected into a uniform magnetic field such that its v,xqbm *c/wgu q8pw)s pi-75ivelocigcbu-q5p* i qp8i smvw,)/wx7ty vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed travelfcmx9 p-+dyz apk22jvoc4// d ing in a circular path in a uniform magnetic 4f2 -co+p2v zp mc d/d9kxya/jfield. If the particle had 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 ova4l.2z 0qfsnq:g*quniform magnetic field. If instead the particle carried a charge of +2e, the rad a*f0oq nqzq.svg 42l:ius of the circular path would have been

  At a particular instant, an electron moves eastward owj4kt.g*6hymzx)mr.c vl 1e-r- 0s p at speed V in a uniform magnetic field that is directed straight downward. The maglj0ehcy z64*or.1mrxs)pw. k-- mg tvnetic force that acts on it is

  An electron has an initial velocity to the southzad x4 id/;87y* hcmju but is observed to curve upward as the result of a magnetic fixyau8* ddm z7/c hi4j;eld. The direction of the magnetic field is

  An electron moving along the +x axis enters aw d9qil.6v 9urw;kwlw1znd,x3 /k, ix region where there is a uniform magnetic field in the +y direction. What izuwl 9w .;ndix9d,61k3vi/ ,kr xwql ws 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 strgcc/+egh0wvm72yg1 a(r aw3xaight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength dd1v+pw s:x7+n bku i qim5l;+of the magnetic field produced by that wire decri dpmwviul qb n1dk5;+s7+x+:eases to

  Two long parallel wires placed side-by-side on a horizontal tab136b5aeces 7g; wphkd le carry identical size currenech 3a;6dweb gsp75 1kts 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 s05q cm7.*w j-raln onride-by-side on a horizontal table carry identical lqnao - nmcjr.57rw *0current straight 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 magn)qshoj -r6;lf/k jku )zbx :h+itude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the twoj)uo-k+r/ z: q6lhxbf )jhsk; wires?

  A long straight wire ca: /+, ptiwz-l.cql m, aey;2wucvc )jfrries current toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the pro-uzlcqc l /) e+jvf,i2 tpmw;ac.wy:,ton?

  A wire lying in the plane of the page carries a current toward the b92dna5 b mm4h r8f-axtottom of the page. What is the di 5 anmfm4r9d28a-bxthrection 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 p1cvj*j)pgx:. t hpw- glaced side-by-side on a horizontal table. If the wires carry current in thg1t*wjj .p-hgp)c x:ve same direction,

  Two long parallel wires are placed side-by-side on a horizonta hl0lk)cu;f),abt 0s spoj-+al table. If the wires carry current in oclalaps)f -0k ;tb, )jous0+hpposite directions,

  Consider two current-carrying circular loops. yo9h276c pjcs Both are made from one strand of wire and both carry the same current, but one h9yc7h 6jcosp2as 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 fd uu+8sl-eu/t, j s/umrom one strand of wire au/eudj lsu tus/-m,8+nd 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 of the larger loop is

  The maximum torque on a current carrying loop occurs when the 7hxd(lhiy :* oxcxyp.k(o6ku;wd3( m angle between the loop's magnetic myxdh(:.(*dk 3ikpox(c;6 u 7wxhyolmoment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free to d:t3j+ j hvaa,mg)vuknb7 k ipi+ zv4q5x* 3:vrotate in any direction will experiauz33:4jv 5 p vvx:,g kd qnm7ibk*)+ihvja+tence a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all elt6)6hp;m x/dlt2spa1 n8p p vwectric motors2s p t8 ptnx6wpp)vm6 1hld;/a?

  A circular wire loop lies in a horizontal planemr2i2e1 vr i.svp/+fs on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field sr/ v2pe2 1irsim.fv+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 accelerated through i(kpjrj a 1/2ba potential difference V and allowed to entej2a ip/kbr(1 jr 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 particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a o6y8 rdra x.k-)al(lx 8r sis.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 east, and the magnetic field is dirl sk (drir x) 6-xor8ys.a8al.ected to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is orientrm.d(hg0q, -;ms fb c bx-bg;pd)tf(y ed parallel to a uniform magneq)c fb( m g;gxd (yhf0.,ps-b;m-bt rdtic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 Argw8ir0jv q,)c(e+ q m 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 stnirwu) tbp o c h;-::j/o,o5er*vupf)raight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 v5ph/e,o:u)obt *owcrpnujfi-: ;)r 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 fie3hpx tn)v0pxt342j7sc cwxj ewj/ t:g qh0(-qld of 0.10 T. What minimum curr t3h2wtjvpq0n7 xs ec3/(pg4w0:qjt)jxc h-xent 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 is the magnif f(.o sorz+9ayiq+x* tude of the magnetic fio+f.x+9ozsqr yaf(*orce 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 obahi bj20hcbwl *, y1;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 apg uzs2;uws/( bj9of , 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 with b 40eaynzy5 n6lkqb) v pj*82oj-9xvbspeed $4.0 \times 10^5 \; m/s$ 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 p t3pv d);rraqmsrebv-1pc8 :*i9u 9od 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 speemgkp dm tgsgrb+53 yln 4**,c+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 acceleration of the electron.

  A proton has a speed of qj--sbx pe(xo(v ,1kc$3.0 \times 10^6 \; m/s$ 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 cu, ynwr wt *kswbl6a+en yl7-u9);o1ecrrent of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wire?lry b+ n)lwa ,1cs 9oeku;-wnte yw*67

  A high power line carrying 1000 A generates what magnetic field at the ground, fw7kt 3sfb: y7 *sgxq.10:3f . kbqfy tsg7xs7*w m away?

  How much current must f72 4tcvo*knzvh4kl k)low for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a lon,ogl1-;j jmmyr+- ki2*h xbollza:j4)ol/e jg straight wire carrying a current of 5.0 A is the magnitudmoy 2lijxhl)ob r z/+-j*l4,:l j; m-ag1kojee of the 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 carry currents of 10 A ine:us3+, lndn l opposite directions. 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 +ludl ens,3:n one wire and 60 cm from the other?

  Two long parallel wires carry curren id8ucxwkwlll;;7, b*ts of 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 wir;lww liux k,*;78bldc es?

  Two long parallel wires carry currents of 20 A and 5.0 A in opxqr/p ,o (5(ce5fzhfy5k c0hoposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the samoxqyhkofe 5 (/ c0c(r55h fz,pe?

  Four long parallel wires each carry 2.0 A in the same directidup, zh1un 24zwos) 5 9ifcw(gon. They are parallezc25honif 1w su(9g,dw z4pu) l 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 direcw:jlqo):n; *uubc6 0 pjjq9 ghtion. The wires are separated by 0.30 m. un;l*) 9bojjqwju6g h:p qc0: Find the magnetic force per unit length between the two wires.

  What is the magnetic field aw pbge2)ul :5 jp.vv -0gkdkx-t the center of a circular loop of wire of radius 4.0 cm when a current of 2.0l vpg)gu.k 0kpevwjbx25d:-- A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What q0 bcd4.a m(qlmagnetic field is produced at a cq4m q0.lbd(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 off //.pn jtviiu-2weg) 4.0 A. What strength of magnetic field will it havp / vjn-fgwt)ue2 i/.ie at its center?

  How much current mustf)l7wqdpa 8m7n,)f. e3foju. edf kz,pow/2 o pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field aopdaodfnm3u p , 7 k.7l w,2q)efofz)f ./ew8jt the center?

  How many turns should a 10-cm tqnl.7g582jcy*v tyag g /s1y long 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 revpx(w ra: .dg5ctangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cmg p:.(xa5vr dw x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform maukag7bh9hmo95pq8w mzx) v )7v+ jql2gnetic field of 0.30 T. The current in the g+9qal w ) x7vhmv m8hq2 uk7z)b9p5joloop 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 cross-+.ko*aobjj* q3 f r0eysectional 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 bsme 6yto+3vck4 v 6+q2.0 A is in a magnetic field of 3.5 T. The loop has an aryvv6bsq o43 k+me 6tc+ea 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 mal8d97;e*na y9 z migtrgnetic field of 0.30 T. The9 mnt9ygea*dr; 8zl7i 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 unifo doy,*ph-sb,m rm 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 loo yp, -bodhsm*,p is parallel to the magnetic field?

  A circular wire loop of area qo5vy2n18kjc;3s odi8if6 pp $0.25 \; m^{2}$ 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 speeo -e t1gu2gd;mx::jqdd 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 rf.l jx d;lf2,$6.9 \times 10^6 \; m/s$ 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 througexcwez:42t ebtevg )6;r8 4ych a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radiuvce ;6ee42x8 bttcrw)g:z ey4s of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fiel6sh7e q htnev+l+.o6u d of 0.30 T oriented perpendicular to its direction of.hs o++lnuhee6vqt76 motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of u wprx61zx0hb6wti:8z ry (7x10 kV before entering a velocity selector. If the B-field of the velocity selector has a valu6 r6h1x(p:irt zw80uz bw7 yxxe of 0.010 T, what value of the E-field is required if the particles are to be undeflected?