If the north poles of two bar magnets are brougf fmz8q5j9*x iht close to each other, the magnets m 9j izx5fq8f*will

  If the south pole of one bar magnet is brought near the north pole of a second bcfi pc3; noel7iwt6 0k96 fu;xar magnet, the two magnets wil ;3ftux67ni wokep ;0cc f69lil

  If a bar magnet is divided into two equal pbvl m(58s.z lnumf,3kieces,

  The Earth's geographic Nvk *wu)lwlceeg x)5 74orth Pole is magnetically a

  The south pole of a magnet points toward the xmbsz (i v p8tq9 mnz-mw9f*;5Earth's

  An electric current producm3l6suo.a/y2+ jl wno es

  Which of the followin)rcq2y)xgap i8y(l x0 x0rpf:g is correct?

  A vertical wire carries a current straight down. To thes eym 6wc z86s*0z9yhx;s ,hs6edocb 6 east of this wire, the magnsbw e8,x yz6mhd9esozc*sc66 ;s h60yetic field points

  A horizontal wire carries a current snw1m u 40jw/df6w.blh traight toward you. From your point of view, the magnetic field caused by thisf0 w4b 1jl huwm6d/.nw current

  A current carrying loop of wire lies flat on a table top. When viewedsq 1p onovoa+/k*8h- x from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic fo pqshon1 a -v8o*/+xkield caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire li he1wuyw ,v2z0es 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 curre2,v e1yz0 hwwunt, inside the loop? The magnetic field

  The SI unit of magnetic fqk)/opv;hes pvd/ q 97ield is the

  1 T is equivalent toiuswuf/;,m 8 q njjem,gb j015

  The direction of the force on a current-carrying wire in ao *xry,(u;43fsv8w pcl phy,1u7g fb.hb3 alw magnetic field is described by which of the fclvlf 18,h33,.w; uwrbh4bs (o7* gx yp pfauyollowing?

  The force on a current-carrying wire in a magnetic field is the stronge 6+o x9vemup*br+3rh xgo1c3p st when

  The force on a currenbi6szhlm: (w 1t-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the ma+voj1o:vtl 6 u0q:o)af p(b amgnetic field vector points due north. What is the divo:)a oa(j0p6 q :1fubltv+morection of the resulting force on this current?

  A charged particle moves and e d/cy 0p m-e 3e4uw0jb+4vhwyrxperiences no magnetic force. From this we can conclu4dey 04 -hr mv j/ecbyuw3w0+pde that

  A charged particle moves with a constant speed through a region where a uniforcxky)jk:5yo4(g g (u xm magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this4)(kgx5x(g y:ckyoj u particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnl*weejq l6 :v ta66wc(etic force on this parti ect6aw e6lj(:l qvw6*cle

  A charged particle is injected into a uniform stk4,sj+kjm f ey4).y magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weie.s js4km,kf) y+4tjy ght, the particle will

  A charged particle is ob63jk qw yb1w dg8n30jjserved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wo80 g3bk yqjw3j ndj6w1uld be

  A particle carrying a charge of +e travel3b-/ q f4zu2ab/jj;d r 6auh aox.6ombs in a circular path in a uniform magnetic field. If insteambu//q a-abr o .f2 3j x46duahbj6o;zd the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron mok-urv3 3dh 5eyves eastward at speed V in a uniform magnetic field that is directed vu5re-y hk33d straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cuh27d;n :ilmj yj.:c:*kyr kgorve upward as the result of a magnetic field. The direction of :hc m:irk*ng.d kj:o2l yyj ;7the magnetic field is

  An electron moving along the 9 s-wtngo3lt) +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the g3n- )lots9wtmagnetic 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 wire:z cb;b kp*7fx is

  At double the distance from agad. t e8x4lj, long current-carrying wire, the strength of the magnetic field produced by that wire decreaseeaj gld8 .xt,4s to

  Two long parallel wire h ( +vn3a gixac51uyu3(;bjfos placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your rigy +au 5o( ;u3fgbchvj(x31i anht 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 cwb4- 1jiz yqaw 57-xewchu4g (arry identical current straight toward you. From your point of view, the magnetic f7 wx uqcg-ae 5wzb1(44yj-i whield at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force , y(3sn5 uhmeebetween the wires is F. The current in emu(, h5y3 esneach 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 towary32h3ni c sxhn qv j10v7-5vrcd the east alongside and just south of the wire. What is the direction of the force on jiy7 1xvc5n v-2hqshv 03rc3nthe proton?

  A wire lying in the plane of the page carries a current toward b6, i0rjc p;nlthe bottom of the page. What is the direction of the magnetic force it produces on , 6blnic; rj0pan electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wire+)d qvh3 t4fno7qxj 1us are placed side-by-side on a horizontal table. If the wires carry current in the same f) q+q hd73uno14txjv direction,

  Two long parallel wires are placed side-by-side on a horizontal table. Il0 -7no8no49n ugf+o ccbpcc8f the wires carry current in opposite directil8fn0-4ccpn ob cgo 97n+co8u ons,

  Consider two current-carrying circular loops. Both are made from one4q ku ;e:v yz0ozc3ed, strand of wire andyv zdzoeku3c, e 4;0:q 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 fr13ole9 bft:cbom 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, 3:9cbeb lt1of the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle bb(wfl 60 lewng4t x:0doq0wq.etween the loop's magnetic moment and the magnetic field vector is4dgelw wqn600. bo(:tfw0qxl

  When placed askew in a magnetic field, a current carrying loop that is fr*hi40 yhht 1oa 3o)1 x;ijjavyee to rotate in any direction will experience a torque until its magnetic moment vector;hah*0y4 j o1jiiyha1x to 3v)

  What fundamental fact underlies the operatk -xo wuy1vjn*qe44d -ion of essentially all electric motors?noy-uejkv * d 1x4-q4w

  A circular wire loop liesyspm9om8h2o 0 in a horizontal plane on a table and carries current in a counterclockwise dir2m9sop8 moh 0yection 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 interaction with the magnetic field?

  In a mass spectrometer a2 pfv m,y1 v o(89oqwjtx8zi,n particle 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 magnent(,yiv 1, pzwq8f9om2v 8ojxtic 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 consistsk 0era e(/jk 9dvjg*c,/(kgo t 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 eaok*/,( jg9v jekc0ra( e/ ktgdst, and the magnetic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a currenocl7bmja)/a-9b )l /keyts r 1t of 0.60 A is oriented parallel to a uniform magneti mlral)9b bk1c- e7//sao)tjyc field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 kn tqb n8z;h(o0k):ejA 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 it is plaml 3r6rmd/(tq;9 qbyj c 9:mrok1u:qfced in a magnetic field of 0.020 T? The wire makes an angljrm1umtcmr9dr9/ 3f l:6qoy q : ;(kbqe of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of jznc,t+e c 3wzk m31w+0.050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod ,k3mw3 zcntze1+wj +c is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is inainq.j0q6yq 1+a ximjkm+ a ,+ogd9f6 a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic fm9 i1+ f6,qjgda i. 6ojn++q makqxa0yorce 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 sp;*wj*r tl/ecwe 8z1jzeed 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 spe9u4q :ona)l qved 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 wcxp- 9vtp- ero y c/7dev,/iy;ith 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 ldnxm f3tr146a 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 a speed of1dd ksff,5tx36: kkj t $8.0 \times 10^6 \; m/s$ 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 ofls65ru ok8t/,muyv (i $3.0 \times 10^6 \; m/s$ 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. What /h 0i z f/prmcvjo1/d3is the magnitude of the magnetic field at a distance of 0.15 m from the wir/ihfcj03 //dzprmo v 1e?

  A high power line carrying 1000 A generates what magnetic field a hr nv0 ,wiut:l0sda1(t the ground, 10 m ad ,vrlhia :ns0w ut10(way?

  How much current musxy.jrc1t7+ n /;dd wcx0 or8ghwu;b)b t 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 lonofdb8)/;bso b, i 9vnzg straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to thesz, 9 )ondfb; /vibbo8 wire equal to the strength 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. Theyrzu9:1uz;78/ zwxesl wpp +lrd +7apn are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm8+pan e x1suwr zl;9z7+d7p p :lzr/wu from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5 q6*s.w hy/ibt bjv(:w.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the tw.w*:(wvy /i sjbbh tq6o wires?

  Two long parallel wires carry currenm0,mq9f a/z)7auk4r8lrt r bwqny1 laz t/91qts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point be1bmf8,tqy/mzt1 r0n)qawuaq7 a/l9 zr4 9klrtween the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same dn o p5hc5(r7lo6vv5selxit nb1 f*5c;irection. They are parallel to the z-axis55f pvo1b inx*oc ( ;e57lnsr vlcht56, 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 other wires?

  Two long parallel wires carry currents of 5.0 A and zt 6xfn.8g1 ;aeks9jl1aeg y9 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length betweenl.1z;ky1 en gsa98gefxj9 a t6 the two wires.

  What is the magnetic field at the center ou 6/b7oaq 8wczf a circular loop of wire of radius 4.0 cm when a current 6z 7uw8/qob acof 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5os ls4) jte wg:8+(+wc scvan- ssh:v)f6v5i n000 turns of wire. What magnetic field is produced at the center of the solenoidl:jn(cvs o :54sh)+is wsnv8ec) a fg-w6v+s t when a current of 10 A flows?

  A solenoid with 500 turfweh (w /z x*: vhsf5;6 vqf1mgl5ll-sns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field wgsxl- qfmh6ve/l5s 5vlwfz :( 1* hf;will it have at its center?

  How much current must pass through a 4008;,;5ozyigyj17iyt9 e crst qz 6qq1i turn coil 4.0 cm long to generate a 1.0-T magnetic field azq 1srqy78 ;z;jyqto5g9citie , 61iyt the center?

  How many turns should a 10-cm long solenoid have if it isidfn8yj+: n:s 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 loop26edx7mpg 0w+ n/ns3pcn oielpi4 03d of 120 turns that carries 6.0 A if its dimensions are 4.7 np3pel2n+w/id4meo03 csg0p i6xnd 0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0rosf1 xp *g9p)oy7li4;ah+ak .30 T. The current in the loop is 2.0 A7 kx1hgp9+)*fi;syoa a4olrp . What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of c1 g0wf: xyx2w 3fam(across-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 c e rzud 4p(jzgvazh cuu9; 2w,474:nalurrent of 2.0 A is in a magnetic field of 3.5 T. The loojzd(ze;pru49nwuzu h2 4lvgcaa4: ,7p 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 of rww 6j3mg2;jq4 pr o votxj+v:6adius 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 torque2gt;v36vwjwxo :pj j6m+r 4oq when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unil sd3 : ;40tlsl x,ac3hupjlo99azc(bform 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 the magnetic fiel3la(bhcosz9 l0pd9cxt,u; j la3: 4lsd?

  A circular wire loop of ortvgi,o w(-lx3 r50abx/ 6)zlq9f ogarea $0.25 \; m^{2}$ 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) has a speed ofdh e ;u4hz0zn+ $1.0 \times 10^6 \; m/s$ 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 vel z4mg6me6doc (ocity $6.9 \times 10^6 \; m/s$ 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 po0fral;dk -g c1tential of 1.0 kV and then moves into a magnetic field of 0.040 T. Wh 0 d1;gfkrla-cat is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a .sg kv8pgh9l ;magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path l.9vsp ;ghg8 kit follows.

  A beam of electrons is accelerated through a potential diffe m*w7* q/nw;mgoj1n yy mbq06mrence 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 ismm7q won0*mb y* q/;ymn1w 6gj required if the particles are to be undeflected?