If the north poles of two of(4r(k) or;.t ( yemdja/t gwbar magnets are brought close to each other, the magnets w m4. oyjowrgak et(f(;d/)(rtill

  If the south pole of one bar magnet is brought n.i+e6m yy3 xcvear the north pole of a second bar magncme6+.xyv yi3 et, the two magnets will

  If a bar magnet is divided into tglf qv,-10y4s tcvyu5wo equal pieces,

  The Earth's geographbn05y+xyglhzy3* m/ur;rtp ) ic North Pole is magnetically a

  The south pole of a magnet pc)x6 jfon cr4 /nkrp-7oints toward the Earth's

  An electric current produceeq:m,g+ku xrzul m-du- i.4kc 5 u68sls

  Which of the following is cop8/ywl ho:pkw9 p)ly1rrect?

  A vertical wire carries a current straight down. To the east of thi0uofp4 (joq jg o nzeq0n/+,y.s wire, the magnetic f0gq,yqj/fnj4ou o+(pzno e 0 .ield points

  A horizontal wire carries a current straight toward you. Fro w:6ovc8jo 6wym your point of view, the magnetic field caused by this currentowco8 w6v 6j:y

  A current carrying loo3kccux2* 9yuah83 bszp of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the dir3u 2a*csh u zk89ybx3cection of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop ofa,7g. p u3g,hnm)rvyro6wk ,n 9e2auo 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, inside the loop? The mak2,nv),u9p g3u 67.mr yagneaoo,whr gnetic field

  The SI unit of magnetic field6s/j 9wo:c4 du,we63y,np ga has6ov t is the

  1 T is equivalent togfyk. 2p (/ogg

  The direction of the force on a current-carry.usv2 0vnl:n ding wire in a magnetic field is described by which of the following?l2vn0s:nd v.u

  The force on a current-carrying wire in a magnetf)vzaw1ps: e 7ic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equadgs- d )+5n fwxh10szqss*6g9xfeu*b l to zero when

  A vertical wire carries bzb) ;9 udv)ug/bho/xqf*; yea current straight up in a region where the magnetic field vector u h b q;;vdg*obzx9/)yeub )f/points due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic forch 5/ wid9sy-81idut rxe. From this we can conclude thatir5 t-d9d 1/usyi 8whx

  A charged particle moves with a coi 0:cp.q0d i0 uayio6bnstant speed through a region where a uniform magnetic fieldoi i:ybq0p6cdu 0. 0ai is present. 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 across a constant magnetic field. The magnetic force zn cf5lmlpg:fn47 y3: n7ze9con this par39g efc n:lm7pn ln74yzfz:c5ticle

  A charged particle is injected into a unife +qc (2wfrel.orm magnetic field such that its velocity vectorq2.r (eefwlc+ is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is ob+ qc.dn2:k tw3bsu xp8served traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circul.bxs2d3pwc 8:+ tkqunar path would be

  A particle carrying a charge of +e travels izle 5)tyt16h k..nbhel4 zv,jn a circular path in a uniform magnetic f 5.6tlj, 4v)zk hzthyn1.eleb ield. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, aae8 6aam(apc8n electron moves eastward at speed V in a uniform magnetic field that is directpmaae8(ca 68a ed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the s ;xge,*q/yu)g 3yuenf7nf kb* outh but is observed to curve upward as the result of a magnetic field. The direcug7yqgb eynfe,n*xu fk/ 3)*;tion of the magnetic field is

  An electron moving along the +x axis enters a region w; orw;d:ox4g +o, mvvgu9q1 fkhere there is a uniform magnetic fieldgrvdo o1mv ,kfw;9og+u x:q4; 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 long straight current-carrying wi l6emj7a)w3nx.t0g x 9v3mdfzre is

  At double the distance from a long current-carrying wi w zj.cd.us.8hre, the strength of the magnetic fieljchu... 8zswd d produced by that wire decreases to

  Two long parallel wires placed side-by-sid xai7om69y7x fz,2vu8azql j j.asm41e on 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 the poin yzsi 4jo2u8x a,6v7l9zm a jaxmfq1.7t exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal taun b 8*b4wlpqqo009(pe+qb d bble carry identical current straight toward you. From your point of view, the magnetic field at the plpqw90b bn+oq8d4up 0bq( e*b oint exactly between the two wires

  Two long parallel wires carry equal wj6s vew5x5m:c vc04pe d2(wbcurrents. 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 twxv65e4wwv 0d epb(c 5jsm2: cwo wires?

  A long straight wire carries current toward the east. r 6pfn:cp:t/1 r,jqv eA proton moves toward the east alongside and just south of the wire. What is the direction of the force on the proton? c p, etj:1prv6rfn:q/

  A wire lying in the plane of the page carries a current totrjj17zd2 c9gward the bottom of the page. What is the direction of the magnetic forcjt 2j9z d1rg7ce 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 wiry4 4rq/ *y ctwkjfb 0e8d9d,qfes are placed side-by-side on a horizontal table. If the wires carry cur*9e8ff k,d rt/dyqb0wjq4 4c yrent in the same direction,

  Two long parallel wires are placed side-by-side on a horiz:bduf.lq/p /1f /du hlontal table. If the wires carry current in oppu/dd1 /.u l:ff lbqp/hosite directions,

  Consider two current-carrying circular loops. Both ari l e5-:bf/ee e:r(zeke 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 fife :eb5(ee :z -r/eklield at the center of the larger loop is

  Consider two current-carrying circular lk) 4ej ))dx,:nnos fseoops. 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 )okx,)4 :ssne)j nfed loop, the magnetic moment of the larger loop is

  The maximum torque on a ctfuu4 k8; 7 /bnalb7zrurrent carrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vectul7rzn84k 7b bfu/t;aor is

  When placed askew in a magnetic field, a current p: x4iu2v c xdg2x l8w4pe0w* 3*fsqbucarrying loop that is free to rotate in any direction will experience a torque until its magneti2*xx *ivx4u3p8cwb p0 qsg42d:lufwe c moment vector

  What fundamental fact underlies the operation of essentially all electricgf ,o ,)zv,vb:ej-t ru motors,b)j:e-o vuvrt,zf ,g?

  A circular wire loop lies in a horin+vts jau27 q)zontal plane on 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 dt v qn7+u2sj)aips 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 parubb)+nm,gk f 6nm)xb,r/p.y4 b1weiw ticle of mass 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 thegbu1xpm )wb+n,ykr /4)b6bf. mn i,we 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 particle passing through crossed e8hbjnp(+fkk, 7d c8k)b qb sw,v wp;x6lectric 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 field is di ,j;vfdbpbc8s hq nb+7k6(wwk , x8)pkrected to the north. What direction should the electric field point?

  A 2.0-m wire carrying a ty9c1d a 1yt6ocurrent of 0.60 A is oriented parallel to a uniform magnetic fieldycoa16t 91ytd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A:tqbezjr:4d9x nr,t , 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 straigh- zqexiyvk 7u54b:u2 nt wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an ayk2: z ue-74vqb5 xinungle 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 magnetic fieldq hwqcso ,c/ue/*ef44 4f3rwc of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cruw3che,ffq c*4 w c4/q4e/soancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the m .k :ndavw8zne/93aj qus;ef 0agnitude of the magnetic force a:aw.u3n jk; vq/sne8de9 0fzon 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 a606 qjsit rmltr /7v3r 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 sk.g;pfc guzq: r.2:ynpeed 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 durb /.rw6yl1pm7 offb6e 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 sp sx :mluagl+n9l 8.6: tqi 1dgznq6 lfi1ms7u4eed 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 sp * d1shcoqmax3 m0y8y5eed 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 o3j njzryl *;l0f $3.0 \times 10^6 \; m/s$ 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 ox;vn bz4k ojaq *d:8y6:ffs) A. What is the magnitude of the magnetic field at a :nos8a*o; qz )4vdjfby6:f kxdistance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whalak24(ny l- jh f bi*xu;fl5e8t magnetic field at the ground, 10 m awl85ah l2 4 fekjlyufn*b;(x-iay?

  How much current must fwinued uez+ -t(;0*rl low 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 carryingk.jqatz-y i+jhb x r5:/9 (gko a current of 5.0 A is the magnitude of the magnetic field due to the wire equal tojiy-g +o ax/ :5rh9bjt.kq(kz the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry curr4v+ lhgio. v gk4v. havfqsw061* 3jhwents 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 20oi3lw.gghvv0k jva641h *vf hs.4q w + cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposio/h7 do6xtk s ,mqm2ex/0n 0wbte directions. The wires are separated by 0.20 m. What is the magnetic fiexs6 t 2q/w odo, m7eb0mnkhx/0ld midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in dft- 5hca3-i u-,acyuopposite directions. The wires are separated by 0.20 m. At what point between the two wires au-achd ftiy35 a-u,-cre the contributions from the two wires the same?

  Four long parallel wires eac4r0j pp 1s3noyh 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 side 4.0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the otheo13prn0j4 s ypr wires?

  Two long parallel wires carry currents o u3-6ckz ve1zqf 5.0 A and 8.0 A in the opposite direction. The wir qzc6k ezv13u-es are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular+dnm +z-60gb rsr(pju loop of wire of radius 4.0 cm when a current of 2.0 A fs ubr(6+ 0nzg+j-prmdlows in the wire?

  A solenoid 20 cm long i. sw0gxy;s.dws wound with 5000 turns of wire. What magnetic field is produced a0ysw.. ;xdswgt 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 current of 4.0cx8z9txq yb)+p 5cqf+l0d; bi A. What strength of magnetic field wilt9c0l p zqb5i;xqdc++ f8x)b yl it have at its center?

  How much current must pass :kl3 awv1q: kjt3py -zthrough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fiea-kl t zq3:pwjk y:1v3ld at the center?

  How many turns should a 10-cm long solenoid have if it is to gener4c2c t-mu6 7ghv8d;jw*q 6sn dwhaw +zate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangular loop orkv0et1;1e dpf 120 turns that carries 6.0 A if its dimension11e k rtp;0edvs are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field zmvlkfe ea 1n:6u3-x/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 pe:ek x 6l/fze m3anv-u1rpendicular to the magnetic field?

  A circular loop of wire of crs9 np ;n*3fnuaoss-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 fieldfgg)buv yfc ihr31;1mqoo,4 : of 3.5 T. Thf gc4 rqvu;oo y1f,:1 bhig)3me 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 ofdsbrcn uxipr2m 4.xc6 nx)4(7 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 looxm42 urn7.spn ()ixb6xd 4rc cp is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is id.hjb:g-9; onb6c*e s0yqej wn a uniform magnetic field of 0.30 T. The current in thgs :oqwejh.0 bec 9y -n;j6db*e 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 gk 8e8j8vqctqt5j0 k ,+nzk7iarea $0.25 \; m^{2}$ 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 a 0h3,jrkmsl)) 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 wl:q*:/5vx ugx 731 qw 3iqy luyrvk-unith velocity $6.9 \times 10^6 \; m/s$ 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 mn p.f7p-h d(fzoves into a magnetic field of 0.040 T. What is the rad hz7ff(p n.p-dius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fielfxxu+q 3e5s t/d of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of tqfs5 3/txex u+he path it follows.

  A beam of electrons is accelerated throug l5q buxm. f/,+ni*hmqh a potential difference of 10 kV 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 rem/n q+fq,bi*lxm5uh . quired if the particles are to be undeflected?