If the north poles of two bar magnets are ymdx )hk*uk )+d:1 stubrought close to each other, the magnets wi+k dd)uuyt*1 s:xkm)h ll

  If the south pole of one bar magnet is brought near the north pole q5,hbl kje,* yof a second bar magnet, l*,eyhq 5 bk,jthe two magnets will

  If a bar magnet is divided into two equal piecqsd j ch0*04spes,

  The Earth's geographi-:3;h tu2qxjj 54wy3 hbkscroc North Pole is magnetically a

  The south pole of a masuhsy jnh*r1db yv0ij fkl4/-5)ib5t3 rh .z6gnet points toward the Earth's

  An electric current produ h);hbkfz;1w ,5fulzt97 sin bces

  Which of the followins6exkt5wq0ej edn/* (g is correct?

  A vertical wire carries a current straight down. To the east of this wire, t 6m;kpghp6z i,he magnetic fip zm;6k,i6hpg eld points

  A horizontal wire carries a current straight towae.(wqc+*k- lqd)w,z/2 j upcgu *t3tt-aa x tsrd you. From your point of view, thg+c 3at.cqqtw-su2) ,*d xwk ztlj pt-*ae/ (ue magnetic field caused by this current

  A current carrying loop of wire lies .:w,uymb5 z duflat on a table top. When viewed from above, the current moves around the loop in a counterclock,m :5uuybd.wz wise 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 lies flat on a table top. Whenobp()x zj8p 9 ,z+es(t d4gino viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this currentd8igtp,zzb( e+ (9s)xo 4nojp, inside the loop? The magnetic field

  The SI unit of magnetic f v+t+u f.1cmusield is the

  1 T is equivalent to kl4topd6: u(o95jl bb

  The direction of the force on a current-carrying wire in a magnetic fkp4hbv u;c.0xield is described by whxu. 0 vhk4p;cbich of the following?

  The force on a current )z0v4zl02 r:q xk 7fjpu,sudp-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal +r7+or /rduvswqjn +8r:y*hjqrrl0 6 to zero when

  A vertical wire carries a curez6k buy3um( -yg t;l0sv. cy.rent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting for kbemyy.yct;vuugs- 6( .lz 30ce on this current?

  A charged particle moves ana1y q *hf ub+lbslha+3 e/2;vzd experiences no magnetic force. From this we can conclude thatazv; f2h +a3eyquh/*bl1b+ls

  A charged particle moves with a const )67 0ctu pb9y6r6etqqlqv )rtant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the c0qy7qt9 ev6)u)qt66 tbp lrrmagnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magne wc zny(xcd9g:sn0 z7)i8j so:tic field. The magnetic force ocs:( w0g: iz9 sjn8 y7nxcdzo)n this particle

  A charged particle is injectepk ecq4r)e6viy2p2kattzp61 ph x 5/ 7d into a uniform magnetic field such that its velocity vector is perpendii p)5az7ce p/kh1t 62k petvrp6 yq4x2cular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling whu8ivh9yg /py* wrf u1q 6t5v4 o.mj6in a circular path in a uniform magnetic field. If the part t j1p.h w6hwv/4f*6i 98q urmgyu5yovicle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in n p4gyl/9 7tblqt*qiv1 p 5hz5a circular path in a uniform magnetic field. If instead the pa 94 *7nhyptq5l/b 51qgi zvpltrticle carried a charge 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 r gnm/v hg833rmagnetic field that is directed straight downward. The m g r3hn3gm8rv/agnetic force that acts on it is

  An electron has an initial velocit gudg t(t;wwpwj t+r7d(l/b7 *y to the south but is observed to curve upward as the result of a magnetic field. The direction of the;wuwt(/j(7b d +g gt 7dl*rtwp magnetic field is

  An electron moving along the +xb e*7 w z;g18h zk10nf2jzqzgc axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetn2*wfz1bk jqzg 7 hze8;g0c1zic force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight curr:8nt5 nex pbx8ent-carrying wire is

  At double the distance from a long current-carrying2.( qr3 1y i8jntnmvow wire, the strength of the magnetic field produced by that wn qwr(2iov 38.y j1mtnire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry sv36bi9 3hh60 suecncidentical size currents in opposite directions. The wire on your righth6 v3cc9 esuh30b 6nis 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 sidfkd7 fd)vixe;-.w qi77bwg/8 ivdm;j e-by-side on a horizontal table carry identical current straight toward you. From your 7j-id7 e;qi.d/kmdwxwf 87)bvi;f vgpoint of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires ca :pez-iqc; o pyy,,w0 lbf6)ierry 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 twbpq)wo;0,fzp,y i6iec-ey :lo wires?

  A long straight wire carries curr yh,o sr g45m8raf0/ a 4sz;+)elfnbtqent toward the east. A proton moves toward the east alongside and just south of the wire.g0e/t8sqz ;yrlbn5m+os hf,)a fr44 a What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current toward the bottom of th3) de zszu5l4mn.g9kn3pgk(d e page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wi3gnd9uz) ng d4mk3pze5(k .lsre, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side 5d,.vdxwte 7u on a horizontal table. If the wi d. vut7dexw,5res carry current in the same direction,

  Two long parallel wires are placed side-by-side on a0mwhx15be a2 n horizontal table. If the wires carry current in opposna1mwxeh 5 02bite directions,

  Consider two current-carrying circular loops. Both are made from one str ;v(7fvvqu(.kwml6o w and of wire and both carry the same current, but one has twice th(klw;f u7v6 voq m(wv.e 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-carryings0x:itm ))ujv;d:ch x circular 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 magneticx0chxvj: u;t:d ms))i moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carryk0wmnd033)o:to j7e/had ma n ing loop occurs when the angle between the loop's magnetic moment dd3):7/m oe hjanmw0 3nakt o0and the magnetic field vector is

  When placed askew in a magnetic field, a currens-hz2a 2vios,t carrying loop that is free to rs za2i o2hsv-,otate in any direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electric t ,pqg4,hmfz**sn,m 6ij-sqtz q. x8g os-l:wmotors? q:8sxg.t- fi*p4,,lwzzsj , qth-nqsmo*g 6m

  A circular wire loop lies in a horizontal plan i0,,zmjplfkq /ku5 fc g(l(pd6 (4dkde 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 dips below the horizontal. Which side of the coil tends to lift offudl g0(kc4(d fz5/k k,mip(,fjpq 6dl of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a parbujd+81vranks l: hg2 o 42z8dticle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnetic field Boabl1 :rg8 2dn+jhs 8 zv2k4ud, 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 charged particle passing thro + v2ks49z vju3f k;m5f(r+op-hrvghaugh 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 straightphkz;+(4v2kgu- hf3rj +vsvf ra 5 om9 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 a current of 0.60 A is oriented parallel to a z6f;xf9t rl,mhj* fm*uniform magneth mr;fzmf* *tlxf 96j,ic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in /6qbs nbmn:x, 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 otc.xz0c jef0)i, y)bd n a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire maketei.xdf,c z0 )jc0)b ys an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass:.nqeft owc 63ty/,b s of 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 maf6tw.3,:t cs oyn qeb/gnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the magnif75doa c) n0gptuaf 7c0d)o gnp5de of 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 5+qz6ylj. qj:ub ue*eof $5.0 \times 10^4 \; m/s$ 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 ofg,/ hk glszl5vsfu1 e0c8b*/q $5.0 \times 10^7 \; m/s$ 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 with speen 9ihd7 nu,)yzd $4.0 \times 10^5 \; m/s$ 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 s) u,*ipa /xphrpeed 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 spe0s;k0 s-a.*if flkkge* d gpu+ wmm6;red 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 ow, k fsclk4)jg7+,)rw*yi *5zvwhowr f $3.0 \times 10^6 \; m/s$ 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 is the magnqorug76/ rzw,;,,zxefkk8t l itude of the magnetic field at a diruf 6;8wkzt, ql7x/zeo,g r,kstance of 0.15 m from the wire?

  A high power line ca2rzi;- ih3zkz3 zetda*0s l(7y jrqy*pa s))lrrying 1000 A generates what magnetic field at the ground, 10 m awad sqa)e)z7h3srar il3* yltzz y(j0*;p -izk2y?

  How much current must flow for bq ky u46dnd8t,)i/d fefk5;s$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance frohmkqg, k/5il5m a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength 5mk 5i/g q,hlkof the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in o; wohc8 8r;ftqab bx(vu7qgyulu44. +pposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that is 20 cm from one wire ab+ gu 8qwv uo 4ahy8r.x(b74fu;;cqltnd 60 cm from the other?

  Two long parallel wires carry currents ofs, lm4ax +i3y17ydvrx 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field +r ,vdsi1ax7my lx43ymidway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direcqpunpt( t9/;o0:lo nkv/ 8b pdtions. The wires are set9 (o:polkudpv80/pnnqt/ ;bparated by 0.20 m. At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry(hklu33v/ d /+ggkxuik yz1l36qca, f 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the corners of a square of3kc z uq udk6( fggv ,k+/h1ix/y3al3l 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 dire ur9gs*gf5)ws ction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wire*f 5g)swgu9 rss.

  What is the magnetic field (,cnw/ 4gcslh0q et*w5x.is iat the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the si4wcnhe t csi*glq,xw. 50/(wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. Wg18y.f zac sr/hat magnetic field is produced at cg.1z a r8syf/the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 tur ln*j d+d)ro*pu+a) ovns is 0.10 m long and carries a current of 4.0 A. What strength of magne )o*r)+ ovdpdnj*u+altic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm hc lkyp/*6a5slong to generate a 1.0-T mal / 6h5askcp*ygnetic field at the center?

  How many turns should a 10-cm long solhd +(.5z gwwe g+bgs.penoid 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 carr hw7t shn;:p;b;zj; xdies 6.0 A if its dimensions are 4.; 7d hh:st;xz ;pn;bjw0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magneticxtu0:ixw g3y) field of 0.30 T. The current in thetxwg:x u) 3yi0 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 alps9+f dc, 7r54bjhucross-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 ofiugpoao..y f*d x+m(* 3.5 T. The loop has m*iga.d(foy p* +uxo.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 wir77r-trutin vbnwk+78 e 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 ofb7 twrk-8urvt+7in7 n the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a unvxjq: *rbn e0.1wb m,kqcx0*h iform magnetic field of 0.30 T. The current 1h*0n:qkec, mwr x. j0bbv*qxin the 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 e*s c l,uyht5pd 4+su(t(r2bcof 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) hashpd n /9jn(o 0)tgl1pp 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 vzfq.wd3,4 5 jy5ve; p5vpxg pzelocity $6.9 \times 10^6 \; m/s$ 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 az/:qi v92wm g57 2ug bbt)qh3/p ndfpp potential of 1.0 kV and then moves into a magnetic field of 0.040 p)5 7vg9/hwunz qgqbp/2t i:m3bfdp 2T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from utkjgi;+k5 0wv6x t3u+ l bee.rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.. 6g;0ubl iekk+3e+xt tjvw5u

  A beam of electrons is acceleratedlc+ r9nw*1pgv through a potential difference of 10 kV before entering a velocity selector. If the B-field of thev+l*nrpg1 9w c velocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?