If the north poles of t p2m7i 1 cmn8zgp/hselq ;/2ihwo bar magnets are brought close to each other, the magneti7nzle2h gh1p2s /8 p /;qcimms will

  If the south pole of one bar magnet is brought near the nor+8f v*ne+a wfmth pole of a second bar mag* fvnw+m+e 8afnet, the two magnets will

  If a bar magnet is divided into two equal pi+s5 dynwrfxx d -7drxgqv4 (f;g3*wicx:d: q4 eces,

  The Earth's geographic North Pole is ma;n3ize ;kswk +gnetically a

  The south pole of a magne)w1f8zm8 )kco jlwlb-t points toward the Earth's

  An electric current pro)(c:1d *phgomb 6gcl a gk)o9lst2.ia duces

  Which of the following ik7smsqv m-dyf m dzpm7**,h+.ip8 xv5s correct?

  A vertical wire carries a current straight down. /v)esjv+6mc u To the east of this wire, the magnetic field cuevs jv 6+/)mpoints

  A horizontal wire carries a current straight toward you. From your pointq;w- w cd)a z ;op5/uf kxgdsh:*.y+rf of view, the magnetic field causepzk; o;hq/s:w5-a)fydr *gu+cfwd .xd by this current

  A current carrying loop of wire lies flat on a table top. 1baj+ s 9ak7yc When viewed from above, the current moves around the loop in a counter sj9+y1kab7c aclockwise sense. 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 lie* dj/,d ov7pm(mrdp6js flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. Whao m* d76dmp,rd(/ pjjvt is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is th7;q:xg o b4 uyed4y 3,;bftbm+9 awbl+7pqqupe

  1 T is equivalent to.rxi+28qehdw- j7ncwh (v so,

  The direction of the force oea 2rey1a q-z21 1shpmvq*jn3v(ryi*n a current-carrying wire in a magnetic field is described n ehrpsv (av31*j 1 mq*2yir-yz q21aeby which of the following?

  The force on a current-ca1rbi)wncw8.t- iv9u xzs/:kg rrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is au7)w. whfw 1wequal to zero when

  A vertical wire carries a current straight up in a region where the magnetg9dba9 9a 6c4 lhm (9vgyya 95fasrq8wic field vector points due north. What gbs695hag9ama4r99(yqc 8dwla 9 fvyis the direction of the resulting force on this current?

  A charged particle movesneyi1kn4bxs91 dj7,+ ty) xvj and experiences no magnetic force. From this we can con y,evtx1yxnki 4n7j)d+9sb j1 clude that

  A charged particle moves with a constant speed through a re7ie 6kkzt 3b,ogion where a uniform magnetic field is present. If the magnetic field points straight ioe 6 kktb3,7zupward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetbc1+wumdxi9i1*fqe qu x; :b5 ic field. The magnetic force on this particlix*x5q c + w9mud1:uebb;fq 1ie

  A charged particle is injected into a uniform magngl53pdr+deie6 :. j wzetic field such that its velocity vector is perpen+pw.rj3d6le zd:egi 5dicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uni+ b icj9o+slx8form magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would8ox 9++c sjlbi be

  A particle carrying a chargen6xjn-2e4xl e of +e travels in a circular path in a uniform magnetic field. If instead the62le xennj-x4 particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastwc-v.g(72rhr6lirlmo ard at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that v26 ol.lri rmrg7-ch(acts on it is

  An electron has an initial velocity to the south but zwsfcxe2*w*4 is observed to curve upward wfw24sc* ze*x as the result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a04axteheg zls2,pb/p- *qip; region where there is a uniform magnetic field in the +y p,h*4ezab0 tp2x/ l si-q; egpdirection. 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 long4o) s3oyt mcj6 straight current-carrying wire is

  At double the distance from a long curtb) 5ynirjr / r(e1fx:rent-carrying wire, the strength of the magnetic field produc:rfj/y)5 bin1rex t(red by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal tablhdj0+m*g,awt k t.2 w0 1bnzk)6oiqjhe carry identical size currents in opposite dbd 0 k 6 m,1hth)*oj.2+z0wgajikqwtn irections. 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 side-by-side on a horizontal table cav a4+la :ymc 31jbwvno: (lst4rry identical current straight toward you. From your point of view, the magnetic field at the point exactly betw:1st(43 wvjaolvay:b ln4cm+een the two wires

  Two long parallel wires c iuq+zppq*4m1s4s3 jaarry equal currents. The magnitude of the force between qszumq43a+j s* pi4p1the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. A proton moves toward ty,fuk3myz j1hs4t*1 j jmb(g4he east alongside and just south of the wire. What is the direction of the forceyu1 jky* gs z,j4bh4j3(mmt1 f on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of nu5+6o ysoz1 *r8jdd hthe 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 thes5j+z n1ruh8dd y o*o6 page, from your right?

  Two long parallel wires are placed side-b 9*1ydiftwz :sy-side on a horizontal table. If the wires carry current in the same direction,isf 19*zt: wdy

  Two long parallel wires are placed side-by-side on a horizontal table. If thehp(/u/w+n 1qp6wacw-o kaex7 wires c7ewpw+u(a/ a 6ok-wqh1xpnc/ arry current in opposite directions,

  Consider two current-carrying circular loops. Both are jspa hkpmi *8:s0t f9,made from one strand of wire and both carry the same current, but one has twice the radiush9*akf s8sptij 0:p m, 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 loop*vcv/h7 q yq1priamt-,vc:d .s. Both are made from one strand of wire and both carry the same current, bu1 -t. /i hc,pmqrv7cydv*a:qvt 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 w - n9ahzda u2)qah)n+hhen the angle between the loop's magnetic moment an)+nhzahn9 ad h-2q)au d the magnetic field vector is

  When placed askew in k hbv6rpr )wb.dg*- 3aa magnetic field, a current carrying loop that is free to rotate in any direct. rbd*v)-r 6wk 3bpgahion will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operationy 81m8 efpin 8y:piepjbgp. k;yq.g( ( of essentially all electric motorsbjy.npm8qppg;fp8( eg k( .8iy y:i e1?

  A circular wire loop lies in a horizontal plane on a table and carries :0fsa vp8xng* current in a counterclockwise direction when viewed from above. At this point, tha*p80 :g xfsvne 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 chb4/f6 1 dgjdmparge q is accelerated through a potential difference V andfd m16bd p4/gj 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 expression for the mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a chatdl7mg0i 2lt) rged 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 foltm i l2d0lgt)7lowing, 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 orienalmz/71+ uea cted parallel to a uniform magnetic fil7mazac/ 1+u eeld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dirg lap*x,s; z1.2md bd:mr4nd fection 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 itmff .f:)vu-bn m2n*8z5/dpnbw jwe e 6 is placed w*/n8 b. f :wpfz-j6fvd )mmenuen2b5 in a magnetic 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 has a mass onq09( jhz3uy8jm hh ho5znl 61f 0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the ynhlhj53j91h qz m6 un(h0zo8weight of the rod?

  A stationary proton is in a ft+yl4cn2 5cow5kc8 2h2 din xuniform magnetic field of 0.20 T. What is the magnitude of the magnetic force tx4nco 552i2c y+fdlw kcn2h8 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 with5k*w u*rvx u1f 1jan;m 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 sof nphd *0u5h(5ge ip9mzm2i 5peed 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 nd4t5b, * uljdworth 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 spee.3wt tc g. 2pl efo;v(v*;licid 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 witvwdy+u *.))we i;eyd qh 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 acceleration of the electron.

  A proton has a speed kda;2bv0 qw 1wof $3.0 \times 10^6 \; m/s$ 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 wtw8b zn1) 39tfb-hzilire carries a current of 25 A. What is the magnitude of the magnetic fieldbnt3 )zi8zlt1 fhw-9b at a distance of 0.15 m from the wire?

  A high power line carryixhe x,jg9w2)q ef7t,agqq *s1ng 1000 A generates what magnetic field at the ground, 1f7tje1g*qqqwxa ,s g2,9 e x)h0 m away?

  How much current must 1h4y; hde,h .fcade)q flow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long sqwyf*qriyy.g.9 1 p9 etraight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the streny qq.f1ep.ri9*yy9 wggth of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposi+8a 9rlap pu mm5lr(ji/ gz8u* sn-as2te directions. They are separated by 40 cm. What is the magnetic field in the plane osg82p*lsa8/ umn z+alapj5r (9u-im r f the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currentsvt5 g0lsypm8i*t: x1 xlw 0:ej 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 stp jl l:vmeg05iwt 0x8 x1:y*the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A q rxp)fml)go6:f0xc .06 avwl in opposite directions. The wires are separated by 0.a0 : v60of ql) w.)l6fmcgxrpx20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wi50z-r:6sq i,am uekxix 8kl w*res each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of sideli6qme*a 0 kx-5xwi,z8ukrs : 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 oz ei(l1)si5mqs, vls w0:m4bopposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit lengtz i,esoqsi:ms (l45)blv0wm 1h between the two wires.

  What is the magnetic field at the center of a cia1fdba,q i*nku:mw:; rcular loop of wire of radius 4.0 cm when a current of;,uim1k*df :qnbaw a: 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic fi* pspk 0)8umoxeld is kp)8p0msu x *oproduced at 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 rzhy yz7:r1l+ current of 4.0 A. What strength of 17 :yh+rlz ryzmagnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0v.say 8m +(tg3*sy*mpd fpqnkh8 fa7, cm long to generate a 1.0-T magnetic field at thk3dsmt*af8 nyg7py8 +p*sm fa .v(q,he center?

  How many turns should a 10-cm long soleda2t-uxzzejn 2 a24f/k wl3i8 noid 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( mpn5xxygu-1o ha /ow068alv 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 cmgn0x8(1hwo pxla- 5o6/ u yamv?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fielsgrv rp0 n)6h1q kz:g4 ufnq,gfqo; vw fv4/+*d of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque w/0ur)frnsgqzvk :pgv+*nf1,ohw6g q 4;vq4f hen the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wirel13gc2a p7xeoecj qqs) h 2( x6l0i9ud of cross-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 currentx4wxlf xl p;90,wwsgr)9z v.h of 2.0 A is in a magnetic field of 3.5 T. The loop has an area 0g p 9x,zlwrsh lv94xwx.;wf)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 magnetic field ofjb ip6d 39od+m 0.30 T. The current in the loop is 2.0 A. What is thep+m dibod693j magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of /jj .c 0hfwf(;8.-bqvirrxp tradius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. /ricwhbp.qf.tfjv j (- ;80x r What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire looptv( s v)m pg,+dq3 u8b5kwm-dz of 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 spectrometaipu4 :6+n) * dklghq aiw1 qn;cw4g3z*tt p1ter, a single-charged 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 veloci dq48c8 lhbdunk 9**wa- )ycdnty $6.9 \times 10^6 \; m/s$ 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 73 grwk bk.ck7)vyik4a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resultikw i4v r) cybkg3kk77.ng orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetizf0/k j 3r ak8pa;i+q8q9klquc field of 0.30 T oriented perpendicular to its direction ofl 9i8k0pqj au8+q qkra3z k/;f motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV beh*)b9 am a7yqp 8biqa-fore entering a velocity selector. )qp8y7aa*- i9b mqbh a If the B-field 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?