If the north poles of two bar magnets are brought close to each other, the mz4jtivm4(h lkj ,gn28)m kg,y agne42 k vm,,jk(hm8) inzy4l jggtts will

  If the south pole of one bar magnet is brought near the north polea(mnqdn . 0t .qc1/yzu of a second bar magnet.1qnq n.mc uay/d0tz(, the two magnets will

  If a bar magnet is diviarz z)4hz m4f,/ab ;btded into two equal pieces,

  The Earth's geographic North x/6 f3mu/caak6ccnv 4 Pole is magnetically a

  The south pole of a magnet points towabes9d/n-kcc ) rd the Earth's

  An electric current prsu:c +9bk*qnd oduces

  Which of the following is correct?mhj9t ez h ,:v3)v27qor1waak

  A vertical wire carries a current straight down. v2l ei9 8nqm .5cllh2jTo the east of this wire, the magnetic fieldlm28l h5. i29vcq nlje points

  A horizontal wire carries a current /br-t5 uw sbgk5h;fo8straight toward you. From your point of view, the magne; 58srw- buk5/bhgfottic field caused by this current

  A current carrying loop of wire lies f(ox9 d xs5pqf4lat on a table top. When viewed from above, the current moves around the loop in a counterclockwise senxpx5ds49f(q ose. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire l ng)x6j3poct 8ies flat on a table top. When viewed from ab3txp) g68ncojove, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is zgbk+00v y0ltthe

  1 T is equivalent to,rt:p 1kowwx l c6kd:3

  The direction of the force on a current-carrying wire in a magneticj.wptgbig ;/ fr+z5+j e7m8nbh 10q tc1uea2o field is described by which of ttfbq i o0.jg+7u/c rgm8a511 + ;nwpe2hj btezhe following?

  The force on a current-carrying wire in a magnespgnx7) i p-seb9+i*g tic field is the strongest when

  The force on a current-carrying wire in a mfo7gx z.4ga4 :p dwu7jagnetic field is equal to zero when

  A vertical wire carrixl8l l7yqb5 f/es a current straight up in a region where the magnetic field vector points due north. What is the direction of the rbl/ 7lfq y5xl8esulting force on this current?

  A charged particle moveh tj5m 851k8wh,tnbk ws and experiences no magnetic force. From this we can con8nkthw8 t,mw1 5b5kjhclude that

  A charged particle moves with a constant speed through a 5:j k6w( cxliwm-tve/ qup3a9region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this3/:w -je6kiu wcl9at5 vx(pmq particle will be maximum when the particle moves

  A charged particle moves across a cokksn8q2rs9 6z (be. clnstant magnetic field. The magnetic force on this part96ss8lkk2 bncqr.e (z icle

  A charged particle is injected into a un6pvcasz6+d+9fia:e u 7ep q g;iform magnetic field such that its velocity vector is perpendicular t+6sqp+aeu7ade v9zg ;i:fc6po the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in w u-x7*3k: 4ytqgr jhla circular path in a uniform magnetic fiy-wxhg3u7:* j kqr4 tleld. If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge o6 y9 ;iowpgcq;f +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2eq;;6 9cgwoyp i, the radius of the circular path would have been

  At a particular instant, +qq p zkmgl84xi0a /8pan electron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnet0 akpx lz 8mq+i4/8gpqic force that acts on it is

  An electron has an initial velocity to the south but is observed to curve upwa.eu)fm 2wsym.u/4 v tmrd as the result of a magnet/)v .u24 mfem.wtysmu ic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region wherebvl-bt 4r1mt+p4nh4a )dv9vm there is a uniform magnetic field in tha4nbvhb-)dt+m rlp4v4t9 m1ve +y direction. What is 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 yc2/0-0xq +uufzccoj straight current-carrying wire is

  At double the distance from a long cump k r-wk* -8k3*x7tgjq5tbb9irbvo. rrent-carrying wire, the strength of the magnetic field pr pw b7x39-v-jmrt*5.o ki kbkr8gbt q*oduced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identiozoz *n47x c-e gaof1(cal size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from-* 7a4 zfecoo1gz(oxn 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 carry iyh;aq:;)8uhm/ i9wt6, a ddlg7neukc dentical current straight toward )dguk a;i;9w7eydl a/nqht 8hc,um : 6you. 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 of the force d+ykooty(f n174p6 jx5mm,xdbetween the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between th7mn dfm1(+okxx o5 j,td6 y4ype two wires?

  A long straight wire carries currentd x/ 7fkuv61jm df3bezu /vf;),7tkm z toward the east. A proton moves toward the east alongside and just south of the wire. Whmkj6;,3v m/ffxte f / zdvz7dk)uu1 7bat is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of thdno(jv j; d/ao)c)us /e page. What is the direction of the magnetic force it produces on an electron that is moving perpendicul vso;jd))a dj cn/(ou/arly toward the wire, also in the plane of the page, from your right?

  Two long parallel wil n 0laizb54vhz 3mm5p,43dxx res are placed side-by-side on a horizontal table. If the wires carrymz ixb5vpx03 l5d4 mn,l4za3h current in the same direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If thr p4bjn)x8j8p f2;vrd e wires carry current i 84)2fn;xjvrr b8pdjpn opposite directions,

  Consider two current-carrying circular loops. Both are made from one stran ef* c7i1htf5qd of wire and both carry the same current, but one has twice the radius cfetqh7f*i5 1of 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 of 5 +wz :h(hchf0oqeg(b wire and 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 w0 + (g:hofqbhchze5 (moment of the larger loop is

  The maximum torque on a current carrying loo 4y1c*m3zrtamp occurs when the angle between the loop's m4m m*a r3czy1tagnetic moment and the magnetic field vector is

  When placed askew in a magnc /w7photza wnn c/g 0,; 6eb+/nx-xcvetic field, a current carrying loop that is free to rotate in any direction will expetg h wwnb,c /-va e;7co p6/cxn+/zx0nrience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of in hh7 vb:bx 6.5ptpqdv3 +vo,essentially all electric motors?bo .qhd p+: 7nt, hpvvvx3i56b

  A circular wire loop lies in a horizontal plane on a table and carries cwq5y;qc3tbjy: 9 8v0u/mrgq gurrent in a counterclockwise direction when viewed from above. At this pocg9v gjbqmy 3q5;r/uy: 8 tw0qint, 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 accelerated throob)yz hrx:9f (ugh 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 particle. Derive an exprerhb9()y fx oz:ssion for the mass of the particle in terms of B, q, V, and R.

  A velocity selector ws; y 7lwdwj+ /wq5y+xconsists of a charged particle passing through crossed electric and magnetic fields. Ty+d ww;7lj 5x/wysqw+ he 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 current of 0.60 A is oriented parallel to a unel/2 o 8t u+d,hx5qseoiform magnetiqsoxo+u 2/d5,e8hte lc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directiojxe/vpijmor9 0. 6tebu 2p:r9n 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 wireuk9v52:xt6d nsu (l+b xmev0 c carrying 5.0 A when it is placed in a mamu v sn(uc69x+2 0bt5exkl vd:gnetic 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 yuc:aq,v41 uthas a mass of 0.050 kg and is in a magnetic field of 0.10 T. ,uqt4vu1 acy: What minimum current 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 theb( h45fb 5ixn o(mbia( magnitude of the magnetic foo ni bx(f(b5bh(4am5i rce 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 aub 8u o*rkif8l-qqxy1;q:,(vjce kt. speed 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 ) o-sw z5rc3l qnx4ni*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 sm(iz q0rcz7gj -;t 4n4egya(t peed $4.0 \times 10^5 \; m/s$ 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 witp, r92yij md:ld .h ./dfj)jgdh 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 speed ;tedjpiny,yk v18r+ 1 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 evf9e/a,fb3 gbkwq*,gvz- /v$3.0 \times 10^6 \; m/s$ 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 wirevz1y+m goj9e)1 w +s)scdq6r v carries a current of 25 A. What is the magnitude of the magneoe)s1zq9g6d mr y 1s+wcj) vv+tic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic fwt0 e3o (osg)qield at the ground, 10 m awqg()te0o3 s woay?

  How much current must flow d fd4qh3b2b u:b +pkysg agq/ qc-0r;8for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a s/syetw ,*-2ekn (i 4j xoym4tcurrent of 5.0 A is the magnitude of the mtj m 4ys/4-no* ,ywk xet(ies2agnetic 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 cd.pd,c6 /jdhh: fj ,cgurrents of 10 A in 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 one wire andhhc, /d.: jpj,fd 6cdg 60 cm from the other?

  Two long parallel wires carry 7 syk08y,q7aq oudr.mcurrents of 20 A and 5.0 A in opposite directions. 0 u .qad7mryq8oy 7,skThe wires are separated 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 Anf1 yt 6na.zu+:m p +zxxhq;0j in opposite directions. The wires are separated by 0..z+m0q nj;: hpxn6t xu1f+ yza20 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 direction. They are paralv7x fs-a6 f-xflel 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 a 6f xf-f-7vxsmagnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry wz8b(q amq-z3v(,tqs currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated b(mq,(wzz vq- b83tqs ay 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a ci1 tr(gt(;c/n cz u 1ss1cdh+l sy1f,0j0hrrng rcular loop of wire of radius 4.0 cm whe,tcf+c0(r(1hs1r0 lg/u sdny1r jz;g1 shct nn a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnnxynp dpj6)( d7h)(lt etic field is produced at the center of the solenoid when a njyp7(dx l6)td h pn)(current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4 jn.ozoj)- .xn.0 A. What strength of magnetic fielo) o.n-.njxjz d will it have at its center?

  How much current must pass throqt6-oj 7(ulyc ugh a 400 turn coil 4.0 cm long to generate a 1.0-T magnetyqcolt- (u7j6ic field at the center?

  How many turns should a 10-cm long solenoi pij-l6d :uo.y+4qv ke.rmbb +0l8kcrd 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 mom 0(agd,y59 xd/ngzrt fent of a rectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x n/d,z5tf9rgy(0 a gdx8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30/r:7u8h a a:9 n/-gdjwjdw i qfght-r8 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of tw::n-w ag trf -/qjard g8hu9h 87j/idhe loop is perpendicular to the magnetic field?

  A circular loop of wire of croscidw:5gy*m+- ys * gcjs-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 z-axewe1mzl2*og s, b7h(f:s of 2.0 A is in a magnetic field of 3.5 T. Thewaz :obe*-1 l eh,2fsmgxzs( 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/p16/nkxb7)n7p7 h chqfeklt.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 parallel to the magnetic fin t7qxe1k6k/7 n7 pb)h /fpchleld?

  A circular loop of wire of raden0ygesn0, p*ius 0.50 m is in a uniform magnetic field of 0.30 00 ,ny*pgn eesT. The 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 of are 2t l3*v,ydx yhtl:,mca $0.25 \; m^{2}$ 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)2gfp5x do;jn9p0e oz particle (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 velok51ag(ccxh7jh zf( g+ed* m,r city $6.9 \times 10^6 \; m/s$ 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 thr,kw37ko3 vjrhough a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resu3rvkw 37,jhoklting orbit?

  A proton is accelerated from rest through 500 V. It o*(nm0 qmpza,cpnqt2+ uke6(enters a magnetic field of 0.30 T oriented oppzuc q+ tnn(a(6eq2* ,m0mkperpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a :akbozo9 z;u5potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity selector has a9azkoou5: ; bz value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?