If the north poles of two bar magnets us - ly(se zx0.3ymad/are brought close to each other, the magnets willaldymes/su. (zyx 30-

  If the south pole of one bar magnet is b5csh6 ;tol dq l3jmgp9xb1/j:rought near the north pole of a second bar magnet, the two magnep lm9cbl x dj h6/5tqo;j:g1s3ts will

  If a bar magnet is divided iy7b2)kn 0 kofix:k7 zznto two equal pieces,

  The Earth's geographic North Pole is magnetically;+:i od x2muup a

  The south pole of a magnetmqptt4 3g /.tw points toward the Earth's

  An electric current sqodph/tba 9 c)3 4cpn)nl9m0 produces

  Which of the following is correctwq8 2z*8 d:2jrrq vxjr?

  A vertical wire carries a current straight down. To the east of this ecos (mg:3k ag 3k,3vco.ws9;yb pl/ka:ts 7awire, the magnetiks3cyapok vo,.e9w3gbk; ma7sl3 : asc :/(tgc field points

  A horizontal wire carries7 92ncvh9o;ev k (jugy a current straight toward you. From your point of view, the magnetic field caused by thi9ej nyou9cvv7h2k(g; s current

  A current carrying loop of wire lies flat on a tabbol55mtvnowl u: (-pa0x +bj-le top. When viewed from above, the current moves around the loop in a coun :bmowpl x55-j o0atnulvb-(+terclockwise sense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying ci 0 3qwjf0lx w2vh,fcv4n+o b1lrcular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockh+4fov3wq n0jvf1wbl, 0 c2xlwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic3xb*5qg o) gqu field is the

  1 T is equivalent toqm1h)w 01m zre

  The direction of the force on a current-carrying wire in a magnetic field i zh4bprt fhj.h7i0v4;s described by which of the folvti.p ;b h7fh4hj4rz0lowing?

  The force on a current-carrying wire in a magnetic field is the str/0oitc)z tvq2 ongest when

  The force on a current-carrying wire in a magnetic field:6jp 6e+rlb wq is equal to zero when

  A vertical wire carries a current straight up in a region where the ukann *01gwa,ol;8fi 4w 5cpomagnetic field vector points due north. What is the direction of the rei15,cg*; 40 fonlwa onkuw8apsulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we can co7 un8l:tri4mez eu3v;: a ysm,nclude thenemm 48 3,yruiu7;av::ltz sat

  A charged particle moves with a constant speed through avh q3*.f60f r /ihmpzv region where a uniform magnetic field is present. If the magnetic field points straight upward, hz *v0h.imf3/rf pq6v the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across azjimlfn kd7n4c1.+u se; ru ++v41 tfu constant magnetic field. The magnetic force on this pilfdtkr j4 e m7;v4+ cfn ns1uu+1z+.uarticle

  A charged particle is injected into a unor9 uuvif- .r(iform magnetic field such that its velocity vectorf(r u9o u-.ivr is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed :fc i ):9bwhism9ysoj 8vp/; vtraveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the/ vw s v; :cb99:hy)ojm8pifsi circular path would be

  A particle carrying a charge of +e travels in a circular path in a((dc0 8 zb tkbyyvziiug s+ 3*f*fp,/s uniform magnetic field. If instead the particle carried a chargepfk/ * (t+(idvbu si0gf8zz,sbcy*y3 of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniform md7 b,.vr:jiyz agn vzd:ryj,bi.7etic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an ini ,6o, abh.dpiqr b.3vwtial velocity to the south but is observed to curve upward as the result of a magnetic field. The directioi3.bhdoa q,v ,pr6 wb.n of the magnetic field is

  An electron moving along the +x axis enters a region whh 3b s /sjx*tl-,2rrgwere there is a uniform magnejr/g s2*w-xt3,r slb htic field in the +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 kfkeh.3c5h 4k long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the st9kneq- xsnl/irc o /+9rength of the magnetic field produced by tha ikn/xnl se/+ qor9c9-t wire decreases to

  Two long parallel wires placed side-by-side on a horizontal+w+6 jy4bfilkc)/m,4z ewim e table carry identical size currents in opposite directions. The wire on your right carries current towarb i m f4im+6,cle) 4ezjyww+/kd 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 horicyl-c3sj;:jad i*)uq) jayo8; 5ouwrzontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly betwe3a;acjridous) -;o :l)wcu5q *jyy j 8en the two wires

  Two long parallel wirer; s0 nz1inen /8h9daos carry 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 between the han9810srdne oz ;/nitwo wires?

  A long straight wire carries current toward the east. A pkafov f ih(59)la8; kpen76nzroton moves toward the east alongside and just south of the wirehv7; kenfif(6 po ka5)znl 9a8. What is the direction of the force on the proton?

  A wire lying in the plane of the page cadmo msf2-8x or8-* ga p97rzfyrries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electro8xygz amr 8 m9r* f2os7-f-odpn 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-side on a horizyoq7ua -yq )3nhb(g 1 n).wft4 mem)uiontal table. If the wires carry current in the same directi7 (n)ay-q)i 3umtmh )bfng4y w.eouq1on,

  Two long parallel wires are placed side-by-side on a horizontal table. If the0r 4pjf;3h5dr+mqa dm wires carr0 35 rfm+dr4; hajpdmqy current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strand z.mfio k+ziy0o03esm 7 /0cm elh5.zfof wire and both carrfofsc.mizk0 7mmoh +iey 0l z3/0ez 5.y 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 cwgm0 t b8z,+o vamq66hircular 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 moment of the smaller loop, the magneticmzq6w6b0o8gm,hv a+ t moment of the larger loop is

  The maximum torque on a current carrying loop occurs when veo3vb/u5y y8fd qw40*h -emjthe angle between the loop's magnetic moment and the ma*b j dm5ofy veh0483qv-ye/wugnetic field vector is

  When placed askew in a magnetic fz nht8y 1y(aow14+g9 rud.mz- nq3glgield, a current carrying loop that is free to rotate in any direction will experience a torque until its mag 8h-al + .oydmq 3(4n9gw1yt1nzrg uzgnetic moment vector

  What fundamental fact underlglg 8,) hwtzdqupj4u79 zn03 q*+zihties the operation of essentially all electric motorszgl,wqzt784 03u+u*q i)htpznh9 gdj?

  A circular wire loop lies in a horizontal plane o t td x3;o93uvdhq:.tkn a table and carries current in a counterclockwise direction when viewed from above. At this 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 i9ktxtddt .q h:3u;vo3nteraction with the magnetic field?

  In a mass spectrometer a particle of mai eye wzb7e 2cpa3:-t0ss m and charge 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 perpendicular to the velocity of the particle. Derive an expression for the mass of the particle in terms of B, qz07apee wi- by2t:e3c , V, and R.

  A velocity selector muo1p sb(r3(s3 pr+i4mxcd 6 dconsists of a 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 field3p mm (4b oudr6s(xpr+is31d c is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current orp dzy2vvz1* )f 0.60 A is oriented parallel to a uniform magnetic field of vr*yvzdz1p 2)
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directionh3kzgq a8i 12j 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 5.0zgz/k 0c vz8 sgzf9p+/ec-k 70lp/nqm A when it is placed in a magnetic field of 0.020 T? The wire makes an /kkp glsc00fzqnvc/+ -9g mz 8ze7/zp 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 ud.u jm73pgh+magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the wei37gpj ud+ .hmught of the rod?

  A stationary proton i:3hq3d4/;qv4wvzf8 or zrho is in a uniform magnetic field of 0.20 T. What is the magnitude o/qhwq d4vz3f hio4ro8:zrv; 3f the magnetic force 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 ofbstb-va( c 0- (.fkwrg $5.0 \times 10^4 \; m/s$ 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 spe63ip+(x)wnau vi nkc7 ed 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 wozbt/e /kr0b,j+jc3 hith 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 withp7bdz: v,cfm- 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 af9yfg ,bbs+ v/ 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 omn v/lkl yxd/9v6 uj.8f $3.0 \times 10^6 \; m/s$ 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. W(vig k)hpjo--hat is the magnitude of the magnetic field at a distance of 0.15 m from the h)(v -ji- opkgwire?

  A high power line carrying 1000 A generates what magnetic field at the groun d 0wmq41vjgnio5x dqs*b2 ((jd, 10 m awa gb*wnsj40xvd15jd o 2q qi((my?

  How much current must flowgu;)*2tnc;*ru:xvk - mkeve n 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 straight wire carrying a current of 2f32 fiqg,.do(luf kqz* tno:5.0 A is the magnitude of the magnetic field due to the wire equal to the strenu*i f:fqfgq,t( . odolk z2n23gth of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wiresdisae6,ke6t4 8* urb g carry currents 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 20k ,4tedi 8ab6ue6* rsg cm from one wire and 60 cm from the other?

  Two long parallel wires carry currentde,q+;9i)xalblsx) ps h) 8qns of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midwa)l)s+ , 8sexi;l) qqabdphxn9y between the two wires?

  Two long parallel wires carry currents of * o*o,5ssehuqcdry 1m,jw1sfr y:g 7a*.-gwd 20 A and 5.0 A in opposite directions. The wires are separated by 0.ycdr:5uao,e1wfq,osw * s*1 ds7 .jh- g*rymg 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 the same direction. v5fllc cc*boihmodj8es,.b + - a3y*o o6v+7y They are parallel to the z-axis, and they pass through the corners of a square ocvao -*3o+elj 7s iy,c+mb8 lyoc5o* v 6dhb.ff 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 direce,zopk.hk fnt5.f ky0 /zo-wn,kz) v *tion. The wires are separated by 0.30 m. Find the magnetic force per unit length k,5o, ./kphk y-nz*t0f okewz)fvnz.between the two wires.

  What is the magnetic field at the center of a circular loop of wire of ra0 lo39hz.l:r fw ,xbhydius 4.0 cm when a current .y x3f:bwl9 ,rl hzo0hof 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wiredp w(7 m62xtlx. What magnetic field is produced at the center of the solenopm(x72 wtl6dx id when a current of 10 A flows?

  A solenoid with 500 turn rjsme6)+ p*gat8z-dcs is 0.10 m long and carries a current of 4.0 A. What strength of magnetic fie 6)8d*- zrg smta+pjecld will it have at its center?

  How much current mus5+zpe c2yt ykbp3 7bt+:c1xp4*jqen lt pass through a 400 turn coil 4.0 cm long to generate a 1.0-T m7b c23px bp41y5 ctyeq +t+njk:lze* pagnetic field at the center?

  How many turns should a 10- 0o,ll (-exgiucm 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 rectangular loop of 120 turns that carriht3 4so cv 13v;7fsgmoes 6.0 A if its dimensions are 4.0 cm x 8.0 c s ;fh3omt3vs74g1ovcm?

  A circular loop of wirehmnon;9f/al-mmeq f ,)0xwhc99hk d7 of radius 0.50 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 perpendicular to the magnetich ,)mfwqecmnh 7/f9xhl-na;0dmok9 9 field?

  A circular loop of wi5 rvp:q017 iumj 3 t;ix6qynznre 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 current of 2.0 A is in a magnetic field of luz s:mnzp gun0jn 1 :n( q d0-b8-f8-x:itmbr3.5 T. The loop has an 1zgu0xqdrpl 8-itb mnsn j ::0-(mnf:-nub8z 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 uniform magnetic field of 0.b3r; 7grmg*n2 h6aahy30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of thn2ah3;byrrg * a67 hgme loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.5xj97*ht yez -s0 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic tor*jt- 7xh zye9sque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop o u 38cmh:vuj0lf 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 particle4r7bqjwemm. jhxu0 +, (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 velocityuovig2ricj09 i: .;eb $6.9 \times 10^6 \; m/s$ 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 1.0x8s. z(y6cmco kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resultingoxysz m8c6.c ( orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetifygr;nzuel: *z70bsy :f c( 2xc field of 0.30 T oriented perpendicular to its direction y gy 7ef 0(:;zb: s2clf*xzrunof motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kufrx;wli 9vwr j.zib 2q,6x:+ V before entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of the E-field is requirej: 9ww x2r+fv6 ,bxqu.zilir; d if the particles are to be undeflected?