If the north poles of twu:pq.mhoe 53bo bar magnets are brought close to each other, the magneqmpb3e5.:o u hts will

  If the south pole of one)pa y0-d hx3kygnd8 .g bar magnet is brought near the north pole of a second bar magnet, the two magnetsg ayy8) .ndg-0xkphd3 will

  If a bar magnet is divided into two equal 7y ,pn yq:c6iapieces,

  The Earth's geographic North Pole i6ts3* 4sk dbkys magnetically a

  The south pole of a magnetdrwt9 +e kq/m8 points toward the Earth's

  An electric current produrp uq8dgt39ihc *(dr -ces

  Which of the following is correct?*ma1imt6 yd vzd 87gnfq2tc::

  A vertical wire carries a current straight down. To the east of this wire,8i(enzs .kzkas)mu+r 280auixwg 41 y the magnetic field pointuzg(a 8+z.yns0iaski)8m 24rkx ewu1s

  A horizontal wire carries a current stra1xluurg8 66hx*9yxgw ight toward you. From your point of view, the mag hwu xu69y18*glxgxr6 netic field caused by this current

  A current carrying loop o( r aecl)4 *ob+ci2tpzux4pw:f 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 by this current, outside the loop? 4r*2p+x buw:o( etac4)lpicz The magnetic field

  A current carrying circular loop of wire lies flat on a table top. When vl wv(zc)bip j:l(.(cz9 ev rl/iewed from aboveb( (vvcw./)prj zzl(:ilc 9le, 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 ii e.ujjsbj9(; a4o8afield is the

  1 T is equivalent tolrjcj0 m5f 56f

  The direction of the force on a currenm 9kiko/ypyi o);id0+ t-carrying wire in a magnetic field is described by which of the following iioi+y/)omd9 ykk; 0p?

  The force on a currenm .tjuo jss4-8s9h zsl p/s+4kt-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to z; y+tokxhi2+ tero when

  A vertical wire carries a current st p (kd6yo.t *xe20k ewby1cn1 jifuvge41(qq7raight up in a region where the magnetic field vector points due north. What is1xgy njk(e 7y fi6dwtoqq (vpuk0cb4e.2 e1 *1 the direction of the resulting force on this current?

  A charged particle moves anvkc;.+oi-siujj h 8 tcg7+1bfd experiences no magnetic force. From this we can concludi8ks +hcjuv;1gjt-+fb . 7i oce that

  A charged particle moves wgo1hslertb*(:p-gqeom gt 1: .r0u e*ith a constant speed through 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 t pgg1.m- e0:1* bt geu osrlq*ho:(rethe particle moves

  A charged particle moves across a constant :w(q0iwhjj bhfv 7y .-magnetic field. The magnetic force on this paw-hq:hv f b0.(y w7jijrticle

  A charged particle is injected into a uniform magnetic field suna e9q:j0 u+ui).:hexi+ fmwtch that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle wil0mwhe.9uti:i aje+xqn :+ f )ul

  A charged particle is observed traveling in a circular path in a un 8)is7j+ )pdv5qmx:ldvj r7oviform magnetic field. If the particle had been traveling twice as fast, the radius of tqvordxdm)7l:+j s p8i jv5v)7he circular path would be

  A particle carrying a c tod .;5ghwc r.rm8yxpi:lr32harge of +e travels in a circular path in a uniform magnetic field. If int.rm3rc; ilo2gwp8x :yhd. r5stead 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 spe6x qkzdu 2bj kb8y9)e1ed V in a uniform magnez9y61be u28 xdk )kjbqtic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obset)6 +3uwzb p8 xpj op+r0pjn0crved to curve upward as the result of a magnetic field. The direction of the magneti p tzujr0job++nx8 0pp3pwc)6c field is

  An electron moving along the +x axis en. *-ozhq62q1 qwbo bgzters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic forceo-zhw2q *b6q zbqo .g1 on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight cud9ybn 9n*da/u7a sh.,/einrgrrent-carrying wire is

  At double the distance from a lon. +63gf b0wz f blvezbcnzm1)4g current-carrying wire, the strength of the magnetic field produced by that wire deff0z3czb6+n e1z m b. 4wblv)gcreases to

  Two long parallel wirxhnn/60 v;)gj6uef0 bklo9vv es placed side-by-side on a horizontal table carry identical size current6kvhb)v;j0uoxg l fev6 0n/9n s 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 si x1w,3 fo) ddvw(q,gckde-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly v1 x(3q,wdwof,dg)ckbetween the two wires

  Two long parallel wires carajw57844wzb 6 g sklkpry equal currents. The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betw6k4 b w8gpsk a7jz45lween the two wires?

  A long straight wire carriea6(x q4mkg 8 9wx-iqqls current toward the east. A proton moves toward the east alonlxa 6m(wq4 i98-qqkxg gside and just south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries mx )sbkwqijw8k1z4sh, *cz:8a 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 plm)*bhw8zk8z, k4: 1wxci sqjsane of the page, from your right?

  Two long parallel wires are placed side-by-side ojl, jdqldyku 7htaj8 35do9qo8 d(g.1x87tyv n a horizontal table. If the wir 8dq1.vj yox,ygtdqotjd8 (auljl7dhk75893 es carry current in the same direction,

  Two long parallel wireshs we(js)5(haly3 8 ql are placed side-by-side on a horizontal table. If the wires carry current in oph)ej ahw(yql 8ssl3(5posite directions,

  Consider two current-carryine3boz sv; 9f)u/(ykea g circular 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 field at the center of the smaller loop, the magnetic field at the ckb/)ouevf(;sy 3z e9aenter of the larger loop is

  Consider two current-carrying circular loops. Both are made from onz f5ckdci99i utx;)4fe strand of wire and both carry the same current, but one has twice the radixdu)t ic9 k5 cz4fi9;fus 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 y5i5j)jxr nn) the angle between the loop's magnetic mnn)yxri5jj5 ) oment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop tob.c2z g.t.cr 70 hklvhat is free to rotate in any dc.k.0v . g7tolr hz2cbirection will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essenne g z8qqu9v/si 9 f;1uf3sou7tially all electric motors s 99z;q7geifnq3 u1osu8uv /f?

  A circular wire loop lies in a horjd x7wr8kzep7fjr ( o;mj 1d-9izontal plane on a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's map7ro1j7 rwx -jdk d;e9fz(8mjgnetic 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 /3m tlg98jexz q is 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 perpendic/gj8z mex9t3lular 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 charged partiuuo at /4afxi 9bch9/mf)oo /pyk9:m8cle 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 mag4 by/ u x9touifpham8)//m a ofko:99cnitudes 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 parall-6r3ra3 j owhlel to a uniform magnetic fiwojh 6-3 rlra3eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a cur2u.i.mf0yt1ag0a6 ae fbgiw 2 rent 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 d , r95klqga- :ncet57t(ju jcit is placed in a magnetic j-gt qnd:krcj,5 7( 95tecualfield 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 0.050 kg 3 xnu ;ecrbo+)x42umg-p vk4 iand is in a magnetic field of 0.10 T. What minimuc4u-ex+u)nok mx4 3;b2g v pirm 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 okf;m.c gr4e,df 0.20 T. What is the magnitude of the magnetic force on the proton?4 gme ;,.drkfc

  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 wi3dvh (sjg if-1wja :d0th a 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 speem,j)9ouu aj (gd 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 duo(q / tl:r.:qad6fdfd2a myh9e north 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 qg 0-kzcj 4a2qof $8.0 \times 10^6 \; m/s$ 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 8dp lyzdgx /,)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 speed ofg4c97m ;f ;nk llobs4kgh)l, r $3.0 \times 10^6 \; m/s$ 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 iy 4.e/iqe0h 3g rj :gy29rsfeof 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wijs hr qg920g3 y.e/:e4eii fryre?

  A high power line carrying 1000 A generates what magnetic field at the ground,mjwe7lhn s -,, 10 m s 7wh,jnm,e-laway?

  How much current must flow for r)n:*ds iyz v/9qu z(h$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long:+bgdr;6 n7qe.uo v to straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strengg erdv; .obo:+7tn6quth of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. They oklf)ys8 :.jn8tv7mxare 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 and 60 x:t8nsf) y.km7 jol8vcm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in oi3wh d sw *0s zl3n)fs6xu7gv9pposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betn sux*l3wdwz ssv7gi9 f0h3)6ween the two wires?

  Two long parallel wires carry currents of bkn ypcrt81vdt i341i3gxu vh3k 3h)020 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the p3ibv318cg1yrn k k4)i0tuv d33 hhx ttwo wires are the contributions from the two wires the same?

  Four long parallel wir loi/bga4( v tbp++1rces each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through/ rgla 1c piob4v(+tb+ 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 carrz)1bafk:5 djl u)v7 mky currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated ba5):kf vlmj1) kbud7zy 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field 0nfw-vtnv pk474 ha8rgtk54-gw-c v sat the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the w404pvkr- a5stgn7w8th 4f v-cgk -v nwire?

  A solenoid 20 cm long is wound with 5000 ga+/ufv:*yb .gqb o v16aw)fj turns of wire. What magnetic field is produced at the cen *vj:6oqwbvu+./g b)g ya1f fater of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.uy8 8v dqwj.l -x(-a2 18ducsmi a;slm10 m long and carries a current of 4.0 A. What strength of magnetic fie- a;1i28 yxlu8cm ldsmuq-s.vdw( 8jald will it have at its center?

  How much current must pass thrz1- 1:w,vp 2six76ovme ijmpba(:lsa ough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the centerp-s,abzomw2x1m: 1l(e7 vjpv:si6ai?

  How many turns should a 10-cm long soleno ) wn 0z(( z0jhj*khd,pxnz3yfid 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 rectangular loop of 120 turns th77 ifa5hxf8(0j xbd gb5rmcc ;at carries 6.0 A if its dimensioj cbi5axr508h 7;x(7mfdb fcgns are 4.0 cm x 8.0 cm?

  A circular loop of wire of radiue+gvvapuw i(hepx; b81 twjae 28.f37s 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.w e7bp;xfv.+28(hjvtae ega 3p 1iw8u0 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-sectional aivc)y-7vp zm:rea $0.12 \; m^{2}$ 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 magnetic field of 3.5 T. Ty1z wttnldispq)zw8+z9 4ilu8+ ,ok(he loop has an area of oti+ld k9qti) w(yu8+z18zz, 4wp s nl$0.12 \; m^{2}$ 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 uniq:/.tj wd /zkm 6fy5odform magnetic field of 0.30 T. The current in the loop is 2. t/kdfyd /q:o56zm wj.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wir4wl ehoo/8kkzo4f x, -e of radius 0.50 m is in a uniform magnetic field of 0.30 T. The curren,ozkhkx/4l 8w oo4e f-t 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 area,oa u3(f zu hu2txn 7u;v)(qdg $0.25 \; m^{2}$ 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 ( 3/ eud7 kh)su9aayok 0gsbn3rzf //o4charge 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 ve cx oro20s 03efd y88n0umocv-locity $6.9 \times 10^6 \; m/s$ 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 w,ce3j;syrv:2w fup.d:x 9 hfand then moves into a magnetic field of 0.040 Tv2x9c:yh3de,.fw ufs j :rpw;. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. I 05fbj2nz k6d , kcq*u,qt9xptt enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the n,k2q60q dzbf9tj5c k,u tx*p path it follows.

  A beam of electrons is accelerated trnh)f na d m(,0 msibn5gp7aw+gu* 9*ghrough a potential difference of 10 kV before entering a velocity selector. If the B-field of the velocity ,bg)h*m*fairdn mnp ngs u(9+7a50wg selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?