If the north poles of two bar ma mr/ bd5cl,v7a.7;jg6lv ,wqxa d2oztgnets are brought close to each other, the magnedc6 2rdt 7l7xaz/.qjm;a,v w5,ob gv lts will

  If the south pole of one bar magnet is brought near the north pole(c5 0uxhr( l bzb 4emxd8v-a7y of a second bar magnet, the two magn8m4-xbd vr( 0ulc(5b hey xz7aets will

  If a bar magnet is divided inimi5e;)4hzlb. mns (l3 qo:i wto two equal pieces,

  The Earth's geographic North Pole issqw:,9xwx g3.c 7vwp, jsuw- 2fmrc(l magnetically a

  The south pole of a magnet poin4v+ nnoex3kr6a b4m/hts toward the Earth's

  An electric current produc: (8fy1/xpfgvs ta5td es

  Which of the followingj+yfa*nazi , ) is correct?

  A vertical wire carries a current straight down. To the east of this wi,7 a*rss dm ovc:v:bu8fm8l)hre, the magnetic field pointbrf8 :,dmsum*) os7v h: vla8cs

  A horizontal wire carries a current straight tow2hq8efptp huac:2*g rw )36;ic pavm6ard you. From your point of view, the magnetic f e:; r hfa2phccmgwip apqt)266 8u*3vield caused by this current

  A current carrying loop of wire lies fl8c mpatefc af,-(i+h; at 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, outside the loop? Tf c( ,fa-m;+8ticeaphhe magnetic field

  A current carrying circular loop of wire lies flat on wg.uf:m5fkp-u/h 9j*5tcww da table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic :j wcup.*ww 95gh-5k m/t dffufield caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is +4rnoj fpts1q2(z;qlthe

  1 T is equivalent to ui*y;7uf- wbr

  The direction of the force on a current-carrying wire in a magnetic field is d6nn ,,radug- vgi a14luok .4xescribed by which,d iaog nux 1 k6n.vl,u-4gar4 of the following?

  The force on a current-carra7kyvb+06 (tq rt.1acb*tpo uying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to h 1jxn)4;;n f4gzcjkhzero when

  A vertical wire carrie;ss1 wrkpgz )e7nw owie5 89k8s a current straight up in a region where the magnetic field sgrkz ;8kee8w 1wp9n) ois5w7vector points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force.h e2se ro d*wz xu2qb.8d.-v,b From this we can concludz w -x.hqesd.8 udoe2b,vbr*2e that

  A charged particle moves with a constant speed through a region where a u2p3qhjk a6f31k kzam)jyl 76 mniform magnetic field is presen3mj23jqy6lkp 6k)m aah fzk71t. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves act2d 497z lhqf*qo t3 *l ts1er-rwv2fkross a constant magnetic field. The magnetic force on thl2 t7 ohd19qq * l-rer2sztwt3 *4vfkfis particle

  A charged particle is injected into a uniform magnetic field such 0 dphmm4u .syct.(* tlaus. g4that its velocity vector is perpendicular to the magnetic field vector. Ig sguat m* m4y(l.hc 0ptd.su4.noring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform maq4w,yhfdi17ru v)r:dg1: ybum g;br -gnetic field. If the particle had bdgu-u v7:w1 i,yb; q)hf14 brrdrmg:yeen traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge yxr4vc08wbi3.,zu du of +e travels in a circular path in a uniform magne, ri8cv yux0dzu. w3b4tic field. 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 u3 vykmd m7e8n-lm7 tzquz; +x:/m2kqtniform magnetic field that is directed straight downward. The magnetic force that acts on im mkkt/qv:7;7l ntu8-eq3+ mxy zdz2mt is

  An electron has an initial velocity to the south but is observed t*:qqou:j 9nb9qike uv2y q.f:o curve upward as the result of a magnetic field. T nqq9e2yvb o:jk*u9.ui: :q fqhe direction of the magnetic field is

  An electron moving along the f+(f/)cpxa )3jomxei;l 5ta q+x axis enters a region where there is a uniform magnetic field in the +y da;c o)ajmf +(pxiqtf53 /lex) irection. 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 qcsuef47wkc o 140x 8ma long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of thp;u9q b kgdwn1(lfk21e magnetic field produced by tq kw 11;ldp 29fkgnu(bhat wire decreases to

  Two long parallel wires placed side-by-side on 12e f m 4e svozusx +57xkv0qor-ds)v: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, the magnetic field at the27ee5 vu +xfs)mso-r:0 x4v kvq1zsod point exactly midway between the two wires

  Two long parallel wi xq *g*0wkjv5mres placed side-by-side on a horizontal table carry identical current straight toward you*5 j mwkqgx0*v. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equa2p1*zanu-yjbi e da)d .qrj3;l currents. The magnitude of the force between the wires is F. The current in each wire is n1yi zu n a d.)j2r-qb3j;e*adpow doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A c,ifj3y bnq(/x37l r )frko7jproton moves toward the east alongside and just south of the wire. What is the direction brx,c/3 f 3k7ir yq7lj)o( njfof the force on the proton?

  A wire lying in the plane of the page cap*fub74b t5(7s7 xdknz;eeq vwi b98irries a current toward the bottom of the v ui8t4pfeb7i k5dwbq(77 *x9n;se zb 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, from your right?

  Two long parallel wires are placed side-by- -n emzf87t p,3s6ddmoside on a horizontal table. If the wires carry current in p,fsdmt n7-8oem6 zd 3the same direction,

  Two long parallel wires are placed side-by-side on a horizont)k .uaqci :eo;al table. If the wires carry current in opposite aoeuq):i .kc; directions,

  Consider two current-carrying circular loops. Both are maden0ox-,a n ( ;torle5me from one strand of wire andloe,(xtn5r ;0aoe -nm both carry the same current, but one 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 circular loops. Both are made from one strand of + 65z7/6o ) vdotxdpok;u)t +oifpr rswire 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 moment of the larger loop 5o;66pstrt)d+uid7ko+) /rfo xovp z is

  The maximum torque on a currea r1 /gh96 kh24vcv2njyx c*alnt carrying loop occurs when the angle between the loop's magnetic moment and the hljyc vakr*6xh1n9ga/2c4v 2 magnetic field vector is

  When placed askew in a m93l4l z/f1 dgja3 gxfmagnetic field, a current carrying loop that is free to rotate in any direction will eg j3x4f 1l9d/af g3mzlxperience a torque until its magnetic moment vector

  What fundamental fact underlies the operation ofg3hm8qsxb1 la.e7h i.kh 0c ,o essentially all electric motors?hi qc1,k3slxe708oh mh.gb.a

  A circular wire loop lies in a horizc yne;wbz3nb ;)v5d.uu/ ba1w ontal plane on a table and carries current in a counterclockwise direction when viewed from above. At th;u1b;3vwe/ nu ydb. az)5nwcbis 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 accelerated t--mtqa5q5 l+zz3)jlp 9byra41qsfs p hrough 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 zr41 - my qplal)t3s-fqp5sjb5zq+a9the particle. Derive an expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged partiok4f4zl *m5cwvno rf +rp:r ub)tu *al0 w*+a3cle 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. fk+l5mo:a*rutcaw*l* w f4br4) +v0no3rpuzIn 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 uniformh/7p 8q/ejm:2f nfuth magnme f u/hp:h/q7n28jf tetic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1028fbkdh) ebf-fq-8f+ xry g-z 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.mt0 4mf6d- 4cw/samw z0 A when it is placed in a magnetic field ofc4 a-0z6 4m wsmmf/dtw 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 kg4.n hm9(p5/ i)dbl(b3p uwe k qisk70qbw ifl4 and is in a magnetic field of 0.10 T. What minimum current in th k4kdp07w9ne)wb ( i4. bqqui( lsfi hm3/pl5be rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is6ln:yxv 15sy6 2 otttd in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the plnvx: 2d61 5yyot t6stroton?

  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 s8r:vcryth i5 4peed 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 speed ofma3d/cqx 7zj . $5.0 \times 10^7 \; m/s$ 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 nofa*dsr4lfstm dr v092 s:ac5- tbr(mshx87p4rth 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 o dky5hq/g*e3hcw1 y x.f $8.0 \times 10^6 \; m/s$ 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 speed6vm.la(k u ucv2)jvxu-i :r 2x 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)bh wu ib-9as1,,w xsd 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. Wsjk+obi9 63ynlr6 mg +hat is the magnitude of the magnetic 9ib6++jn6lykoms g 3rfield at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field a) l-b).f 5ktmgj)8tq vbww 1datmrj-,t the ground, 10 m awd51j a )t ,rt)tmgbqfvw-b)l-.k8m jway?

  How much current must flow fory(ni n /w3pba) m 4eefcdde)06 $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.itjk7z d 9 hjui871i:i0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of 8ii 7 ihz j:dt91k7iujabout $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cukana75zp m: atay:k:5rrents of 10 A in opposite directions. They are separated by 40 cm. What is the magneticp: at m5ay7k:zak:n a5 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 2 qgq w rit+nq3t6re;/ yos9x6(0 A and 5.0 A in opposite directions. The wires an6 3q;wt+ (tig9oxqr rsq 6/eyre separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents o 3+a; *wzlcwruf 20 A and 5.0 A in opposite directions. The wires are separ wu *3z+lawc;rated 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 th x 76/:jrzfneee same direction. They are parallel to the z-axis, and they pass throx/ee 76nzr:jf ugh 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 w /pd*6,cvfo( 3d)sioysv t/ :qzc2qwcurrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between ,2qwovsc*d pvs y(wf36 dc)qo:/t z i/the two wires.

  What is the magnetic field at *68pw,pbtj.x gnn m4.x 1 gyhjthe center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in,pxpm t6w. bg14.nh *jnj8 gyx the wire?

  A solenoid 20 cm long is wound with 5000 turns of wi2w6fs sqkdtg;vhd4 gyy 4+ 8;mre. What magnetic field is produced at the center of the2; q8kws g; sghvfdm4+6 d4yty solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 zi3;wyn d )x,mA. What strength of magnetic field w)w xiymz ,dn;3ill it have at its center?

  How much current must pass throughr 17:9hbx 3dl-i(gg- e1m glgrgim-iz a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic lg3 -x :igii gmz9g-1gdl7(rerm b-h1 field at the center?

  How many turns should a 10-cm long solenoid have ifrt 1*q65hwqm g d vmdn3x 1i1gwmq*8j. 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 ,e 30ozhvk;byloop of 120 turns that carries 6.0 A if itv ze,3;oy0 hbks dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fiel7-j:abkugx g,. 3iqlje jc+ci8hr3+ad 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 perpendicular tj:gxbq.gk jla cri3c3 e iu+a-j7h+,8o the magnetic field?

  A circular loop of wire of cross-sectional ars5q,gr9a:oy2 tvd)0fwe kakz z* ;4vrea $0.12 \; m^{2}$ 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 carryinger3rp tl*25io+ ue 2kp a current of 2.0 A is in a magnetic field of 3.5 T. The loop has+* 22e35ulpkopeitrr 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 is in a uni)li 2op(1 xaqu 2s.pyeform 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 ti2x1p u)(.aop lq2seyhe magnetic field?

  A circular loop of wire of radius 0.50 m is in a unk qdz/:jn,:s hwrq/)k v.,9yc 9knzv giform magnetic field of 0.30 T. The currentgd/),9q/z k .v nvcn9 whkyrkjzs: :q, 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 okgm uu9+g*ei:m)x .2mxas8ea 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 (charge e) hacbhzny)h lc5d1av5(jwt sd82( i)ta( s 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 vrvq07ju/c df r, 2j/ivelocity $6.9 \times 10^6 \; m/s$ 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 av(lfb9 u u r2l v(1ann8txd+vzhj*pf582tgk, magnetic field of 0.040 T. What is the radius of the prtzlv +vv( a9uxl,bgr*ntp8k2n12d85 u ff(j hoton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field o +k0s+qty xtin/: u*msf 0.30 T oriented perpendicular to its direction o :*ms0x q kt/tius+ny+f motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference o xu6t/qsm9e2 gsf)pn4nl f m-9f 10 kV before entering a velocity selector. If the B-ff xm9gs6qt n94e- mn2u)fs l/pield 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?