If the north poles of two bar magnets are brought close to each other, the m,:m(w8qn oe fgltv.mha(z*:u4 2x bfdagnets g v(t8ef2lfm quo zn*b.:a4md (hw:,x will

  If the south pole of ons cg+ucikz8j qd,7pf 7a+kf2 2e bar magnet is brought near the north pole of a second bar magnet, the two mafd qc7,s8 kgfzipac2k7+2u +jgnets will

  If a bar magnet is divided into two equal pidd a. -;f 65cptruna;weces,

  The Earth's geographic North Pole is magneticallwree3jy8;wn ,1eb4n b1x alc 2y a

  The south pole of a magnet points toward zfh c2-iq-x7 ks-vx(wotn 6, dw8o:bbthe Earth's

  An electric current produces6lghq1;;wa d m w(pv5haem*x;

  Which of the following w,tt1 :vobvo:xhz4 bpnzw454 is correct?

  A vertical wire carries a current straight down. To the east o0vh5jtr*0jxz 8- aw imf this wire, the magnetic 5- hxiaj0wrm0t8*vj zfield points

  A horizontal wire carries a current straight toward you.m st:abi/cr ofg49 1.thkug74 From your point of view, the magne g49ksc1:bto m4ifr/tu.a7g htic field caused by this current

  A current carrying loop of wire lies flat on a table top. When gsy746t shrk9 p,3 s:fqb2c cdviewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field:72yghsfqrsc4cskd pb 36,t 9 caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top.+h1 bt:tapg ;r 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 :;tr bg+t1hapmagnetic field

  The SI unit of magnetic field- c (v(s4kk 2:cehppan is the

  1 T is equivalent to d;/tj c)fv 1g1a/ggem

  The direction of the force on a c*)x5o jv/nm(q8z 2p pgyx /lpcurrent-carrying wire in a magnetic field is descrx*2g nop8p/m /lc)qx(v5z ypjibed by which of the following?

  The force on a current-carrying wire in a magnetic field is the st:ckyiwoc -w;8rongest when

  The force on a current-carrying wire in a magnetic field is equal to zero d w:5y-m)*csjikix ,mwhen

  A vertical wire carries a current straight up in a region where the magnetic yucym s,-r5ak4m3 mj*4nngw -field vector points due north. What is *j4 nkum,-ny5ca3r gm4-m y wsthe direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this4noebf7ny7d5hi p p -4 we can conclude th h o54ny7p7iepfbn4 -dat

  A charged particle moves with yq8nq8rl.vwa8fo fd x+p:*9o a constant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic fora x8 f.vp8or8: dnwfq +qy*lo9ce acting on this particle will be maximum when the particle moves

  A charged particle moves across a constl ox- 6g4nkb6bant magnetic field. The magnetic force on thisgb k66xn4-b ol particle

  A charged particle is injected into a uniform magnetic fiel-d4fnmegu d0:d such that its velocity vector is perpendicular to the magnetic field vector. Ign4g:- mu fde0ndoring the particle's weight, the particle will

  A charged particle is observed traveling in a c*vhg2tf l+ h5obde1 2ktsr *r3ircular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of2ohd31k5brste* + v h* t2rglf the circular path would be

  A particle carrying a charge ofnjm ens/)n *c. +e travels in a circular path in a uniform magnetic field. If instead the particlns/m*e) cn.j ne carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron(0 gkvi3mg6pt/7p tb;z 2ebf x moves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic force that acts on it ieg b btf6v(ipp 7k0;t 23zmgx/s

  An electron has an initial velocity to the south but isgxv rb k5qo8,ndc 6*if).2wdm ptz(k / observed to curve upward as the result of a magnetic field. The direction of the ()t.,irz/gd cpwd 8nob 5x2q k6v f*mkmagnetic field is

  An electron moving along the +x axis enters a region where;* -oa-l+qi8 d+yofx (plur gr there is a uniform magnetic 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 tpx8+r+u-- g *qlaof rdy io(;lhe page.)

  The magnetic field produced+4yupm 5wp1mg by a long straight current-carrying wire is

  At double the distance from a long kx9a:ar,vb*lr, (jricurrent-carrying wire, the strength of the magnetic field produced by that wire x rjab9lv kr,i,: a*r(decreases to

  Two long parallel wires placed side-by-side on a horizontal table y2/ ,(yfihs /ay/ -xvv2igirrcarry 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, ir2( g,r vh/s-fiyy/ vxa /y2ithe magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side om1q;;jzah ak .n a horizontal table carry identical c1; khj.zm ;aaqurrent straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force beqe7 t52 0zrggltween the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the l25gztqge0r 7 two wires?

  A long straight wire carries current toward the efs i kvw7x,dl t8qwi/+t t8.2east. A proton moves toward the east alongve wix t8fi 2+ 7,sk.wt8ltdq/side 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 a current towarc l,cbe 44z(rr:k ,gqvw u/nz6d the bottom of the page. What is the direction of the magnetic force it produces on an electronc,ku6 r qw4:(cn v e/z,grbl4z that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires4(k-m ghslh --l+20wis ph)uonml zi: 1glil- are placed side-by-side on a horizontal table. If the wires carry current in the oh i-ll +1 i()ip0l4 lh- -skgmwmhnlszu2:g-same direction,

  Two long parallel wires are (rjwkoun/k g+ .oxlupq(9;7jplaced side-by-side on a horizontal table. If the wires carrq(lu 7jj kug9rwxpon.+ (/k ;oy current in opposite directions,

  Consider two current-carrying circular loops. iy (smc -at*v2Both 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 c a-*mytv2i(ssmaller loop, the magnetic field at the center of the larger loop is

  Consider two current-4mk ckpeh(a6 aenf/*go8h o90carrying circular loops. Both are made from one strand of wire and both carry thk*c 4hef a6ahmok(/0e98po g ne same current, but 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 / : y mr*iu/yb+:qwqybloop occurs when the angle between the loop's mag :y/ w*ybmqy qbu:i+r/netic moment and the magnetic field vector is

  When placed askew in a magnetic field, -jw 657xba- jie;a cala current carrying loop that is free to rotate in any direction will expeae-lj7 - 5 6iabjwx;carience a torque until its magnetic moment vector

  What fundamental fact underlies the operatio2fh nay b*hee;y4gd,0n of essentially all electric motors?dhehneyy0f ;* bga 4,2

  A circular wire loop lies in a horizontal plane ocv;. ;/ 9ych//luqnp5jhknvo n 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 becap l5/hqnn;/. o;h/vkuyjc9v cuse of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and c in+wt/4td8te harge 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.8tde 4/wt ti+n 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 charge)k sloh p6,vz y8wz4go5pv0ym.irb 4-d particle passing through crossed electrkmy)il80,64gvbrpo s-hz5 wozv4.yp ic 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 directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying ayv+0vepin u+q /9ga :b current of 0.60 A is oriented parallel to a uniform magnetic fi y+9apuvv n+gi0qe/b:eld of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction ofq)hr/ y 5v8art $30^{\circ}$ 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 6pzpfia-k 2 ,jkt1v/.mbu5q0bmu 7 mxcarrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an atapkb67,0m ik-.5p2vzfx /1ju mu q mbngle 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 an* :u 7xah,hxzgd is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magneticu, x:x7hh*za g force to cancel the weight of the rod?

  A stationary proton is in aq s824rawhk/e uniform magnetic field of 0.20 T. What is the magnitude of t2shqe a/rw 8k4he 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 widloo d2 me+: jl.(tn6jth 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 speed-ybmp+/ clz -,ta j/ms 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 norttyeb9 ll;ve7ja(n7m,o as-z(2i oa) qh 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 withd. 12qz tnr7w)tdbjf7 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 a spe: .rgjzp4h/c dr+roq5ed 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 of qfe7rpyz k;ndw -11/-jjoleq 25rj 5a$3.0 \times 10^6 \; m/s$ 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 ca(08dq t3.jtkjxk n og.rries a current of 25 A. What is the magnitude of the magnetic field at a distanceogd3kx jt.jt.kq (08n of 0.15 m from the wire?

  A high power line carrying 1000 A 8 1lh ep3-.lemy a7wccgenerates what magnetic field at the ground, 1m l ywh.7l c-c1e3epa80 m away?

  How much current must flow.tpbvg3; - ,n 8gjagk6agq1ny for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from ahw.v);hzgr j * long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due h .;v)zwjrhg* to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cu*dgk83 .4wq0tb zmu bkrrents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in th4bu.m kk gwb83qt0* dze plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents ofcgd3, q.eno0 q-ugkv7)m hvq. 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What7 ev dmnqk,g.qo) 0vh uq.3g-c is the magnetic field midway between the two wires?

  Two long parallel wires carr j23ur9d8- cilyg+ zqd qiw.y0y currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contribu8iwi- d+cyqqrjzyd30.9 lgu2 tions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. Thw5ig/et2*9h - wje -qmu dk2hcey are parallel to the z-axis, and thet9eegi252-kd-*u mwh qw h/cjy 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 8.0 A in the opposite x : a.mstm(d:wdirection. The wires are separated by 0.30 m. Find the magnetic force per unit length bet .masxtw:(md :ween the two wires.

  What is the magnetic field at the center of a circular loop 2w pr0ae*;luo/+iab wof wire of radius 4.0 cm when a curreapwl;2rw*oaebui 0/+nt of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000d0a7ts*.podq7j4c p q turns of wire. What magnetic field is produced at the center of the s7sa .7 dd0cp j*tqop4qolenoid when a current of 10 A flows?

  A solenoid with 500 tux (/r1bo8bc 5 *wii)kl+s2o+;0x ligg bhcczjrns is 0.10 m long and carries a current of 4.0 A. What strength of magnetic field will it xc2b/8xi k 5z(wcgliois+hr c 1*b;l+0) bojghave at its center?

  How much current must pass throu cb zsf /wx,y+x+u:5magh a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic fc wf:u,xx++/5sb ayzmield at the center?

  How many turns should a 10-cm long solenoid .7 b-x 12bx4id+chacwnhu t7yhave 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 / mohqv96wux :that carries 6.0 A i/uw9 6x qmvoh:f its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fieldb,gkyyn3elc70*p b* d of 0.30 T. The d0byyenp*g*k7 ,cb3 lcurrent in the loop is 2.0 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-1yj(c4q3u a yosectional 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 3.5 T. xq xl 2j(q)r+dj7fty- The loopj2yqql7jxrt xd ) -+f( 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 radius 0.50;ghg ie+aju wm*+z-6h 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 p ge+m6ah;zjuw - i+*ghlane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic f13wpicjj l :l-9bi2b ijuh:t,ield of 0.30 T. The current in the loop j -i9tl,23ib jiw:luj1h:c bpis 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop ofm7(e oym ,6gdxq8y(b j 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 particle (charge e) has a speedfw7o0 4y*2- 7c4nh)rmms eboim c8yuy 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 wie a8 8u5gg; ua5j5ttlh2vc3fzg* ,metth 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 mok4aln7 vs/3qv6 il k-yves into a magnetic field of 0.040 T. What is the radius of the p 7k6sqk3l a4in lv-/vyroton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fielh-tb+2r l) 7gnbi vua/d of 0.30 T oriented perpendicular to its direction of motion. Determine the radius ofa l7g)bt/u bihnv-2r+ the path it follows.

  A beam of electrons is accelerated through a potential differencevbzg)d19n/a t 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-fivbnd 9g)t/z1 aeld is required if the particles are to be undeflected?