If the north poles of two bar magnetsd ;tn;,dh znhz9yk,dpp/n i4v 4i(+jw are brought close to each other, the magnets dpin;vzd, +zph ;n,/khwyi9n jt (4d4will

  If the south pole of one bar magnet is brought near the north pole offx(9vi3m tso 8 a second bar magnet, the two magnet3t( mi8xs9vo fs will

  If a bar magnet is divided into two equal pisd/u4qg8e+j oqsz /)m eces,

  The Earth's geographic North Pole is /x uejlnuw p-7oi ;7/emagnetically a

  The south pole of a magnet points toward thg0qt4ng ip, 6r h*f1tre Earth's

  An electric current 5i dtjx;::sn -rqhuc4produces

  Which of the following is corvxh-xe7se(fm;0k c(z rect?

  A vertical wire carries a current straight down. To the east of this wire,siz,nd,8(zd.:uwj e.av1dp z the magnetic djedz(vd.uzpw1:8 .,zsi,n afield points

  A horizontal wire carrirx*v9o7ucxl*0p q e 3nr0u i,qes a current straight toward you. From your point of view, the magnetic field caused by this cur x97pl o0xqevr0*ri ,*3uqncurent

  A current carrying loop of wire lies flat on a table top. When viewed from abo-p ;zwr2ay2(f+x om leve, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this o a(2pz- lxwe2y+rmf;current, outside the loop? The magnetic field

  A current carrying circular) il +2rx3bapjlwdm6 bb+94kw loop 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 direction of the magnetic field caused by this current, insi ik9lp4 mwaw j2++b 3lx6)brbdde the loop? The magnetic field

  The SI unit of magnetic foqnhnp5 3d+k9 ield is the

  1 T is equivalent totkf,ca8 y3 u/ q8se7cp

  The direction of the force on a current-carrying wire in a magnetic field is de 5x5hjt-etav- stta-x5hej - v5cribed by which of the following?

  The force on a current-carrying wire in a magnetic field is the stronozoegd:fr1 8 iz 7uy2:gest when

  The force on a current-carrying wire in a magnetiqs-5d9 f p69r .zq p,ngc2kxnwc field is equal to zero when

  A vertical wire carries a current straight up in a region where;h7w jcl ds2r, the magnetic field vector points due north. What is the dij7s 2lcr d,h;wrection of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. From this we canho*xq- siv)jrsdto b/k3 *a5; concluda;k r sdoj )3q5o/ tvixh*s-b*e that

  A charged particle moves with a constant spee7cero +or;rh 5d through a region where a uniform magnetic field is present. If the magnetcroh re;5 +7oric 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 um+s2 :m hphc5ev 5h2mon t e:mh 22mmvh5chs+u5 phis particle

  A charged particle is injected ina+q +g49h waf9s tm*h;sz)rklto a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particlehwha;4s)99 fq r+a*tmk+zgs l will

  A charged particle is observed trejglx cc.n+84aveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular pathc+jnl8c g.4e x would be

  A particle carrying a charge of +e travels in a circular edt. y*k k0-8rm (uvlfpath in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the kv 0(e*yt- l rmfu8kd.circular path would have been

  At a particular instant, an electron moves eastward at spe fzq4 2i7ah -hdbjb8frc.rn+h5m,5 dved V in a uniform magnetic field that is directeddzfhbch,+h f72.i5-8adbqm n5vrr4j straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obso, .fvvg;s* w+ery7n. buy- iferved to curve upward as the result of a magnetic field. The direction of the magnetic ;-f yivo, fb7uenygvw*+s.r. field is

  An electron moving along the +x axis enters a region where thahr5 lx al5 hye4,**dhere is a uniform magnetic field in the +r* hy*, hxh e5l5aa4dly 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 straigqbqg*a6uhv 3r dg7)- jht current-carrying wire is

  At double the distance from a long current-cagc *e up6rq y(ist436qrrying wire, the strength of the magnetic field pro c*6(te g4priyuq3q s6duced by that wire decreases to

  Two long parallel wires placed side-by-side on a horii5 wy:h 5zz1ne4ldqs;zontal table carry identical size currents in opposite directi il ew41;yhqz :dzs55nons. 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 point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table carry iden-fd w9cn,c x*wii,. zt8ikz9w tical current w8z *dti9czf,9 , icx.nw-iwkstraight 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 o; 6e 2-w8qdnoiah aq)gf the force between the wires qo2d an-a);wi8q6 gehis F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward theaiqatb2 2mc q ua/z040 east. A proton moves toward the eastz4qua2bc 02a0/ aqtm i alongside 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 currez;9cds(:x pql nt toward the bottom of the page. Whatql :cz;(s9dxp is the direction of the magnetic force 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 wires are 6h scj2n:b j*n :p4izbplaced side-by-side on a horizontal table. If the wires carry current in the s :ihb*jnnj6p2z:c4s b ame direction,

  Two long parallel wires are placed side-by-side on a horizontal tab 2ahnc*o;qn( a caxo,3.qfc 5ile. If the wirn,.cn i;xohc 5 3aofa2( q*aqces carry current in opposite directions,

  Consider two current-carrying circular loops.,dct4aqbn1 n5f5j ;m9kb,kmp 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 field at the center of the smaller loop, the magnetic fienp5m ad ,4 ,q;kmbt5nkjcfb19 ld at the center of the larger loop is

  Consider two current-carrying circn hq- mp5ijb38to gt1m7lhh96ular 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, thm9jlmt1 n5ob 3-q i7ghp 86hthe magnetic moment of the larger loop is

  The maximum torque on a current carrying l2i6(0utm2 tczo5jt l woop occurs when the angle between the loop's magnetic moment and the magnetic field vector isz5twm2 oi26jt(c u 0tl

  When placed askew in lxu th,ualbv,9( vj;y5, knv+a magnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment yl k;+nv9av(hul,5ju,x tvb ,vector

  What fundamental fact underlies the operatipd zfjl56 z/oyzk 8)13.mil xeon of essentially all electric motors? ylidox5z6kezf jl1m8/ p3z.)

  A circular wire loop lies in a horizontal plane on a table and carries current izjz(:nv+.utl3ej4 a li83 ihvn 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 t(jzjat. +3 l :zu ve8ini3hvl4o lift off of the table because of the torque caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is qnvg46 xzbi36 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 term4 nqbxg63ivz 6s of B, q, V, and R.

  A velocity selector c,/d3i ,q5 irjvno6ljconsists 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 c /qo6ji ij,ndvl35r ,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 a current of 0.60 A is oriented parallel to a uniform magn t+xj7:k8jvu i k3te4oetic fieldj +7 texi8jk: vu34otk of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current oftn e7b6b/leyd. 9i 4c2 so:cx1;bva8el b1iyl 10 A 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 mbhq97qf; * gxfeter on a straight wire carrying 5.0 A when it is placed in a magnetic fibf7x gfh q*;q9eld of 0.020 T? The wire makes an 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 magnetic rm3s.pta( jo+ field of 0.10 T. What minimum current in the rod is neerjo.p ( tasm3+ded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What iw1w kph-cf *cq:(,xzw s the magnitude of the m- *(wzxh ,pc1w qf:kwcagnetic 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 sv6k,hv :p.xwqsx *j9 ipeed 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/n)u92x 1hhxv uu:q) g*q) zrtp sigy0 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 w sftc pkg,lx6r;(1(cnith 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 speed oix1fj+ sd0g (hi bf8sltw2 5bg4s:s/vf $8.0 \times 10^6 \; m/s$ 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 2ct(qrujl lg9./b pb 1speed 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 l31vddv+-r mv $3.0 \times 10^6 \; m/s$ 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 arh3oqxpz1 65zveq :t 5egat -7 current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 r q56pzo-xv7g15 3ea ze:qh ttm from the wire?

  A high power line ca -m,ihhjk1y mlycl4)j+tz 6l:rrying 1000 A generates what magnetic field at the ground, 10 m ylz4 itkh6l+c-hjm1 jym,)l : away?

  How much current must flow forih3 fhtu a-b8/ $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carry )c)hq;kdsx8ying a current of 5.0 A is the magnitude of the magnetic y8sxc ;q)) khdfield due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wirj 5g6 eturh/m)es carry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane6r/g)u thj 5me of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wi7oa-ok g (a x6agyqmx0y-)of(res carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 qo--yma (7f(06ao kogy )gxax m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 um,+uvi, ny3f 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 contributions from the two wires theiyuu3v, mfn,+ same?

  Four long parallel wires each carry 2.0 A in thehe z4v+ x 1fq.u4cnvfdk)ey53 same direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm posfe q+vvf414cxk eny h3)u5d.z itioned 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 oppositrk)xslva rx2e u9z(wu 2kv7dfh d2um/q ,2-x+ e direction. The wires are separated by 0.30 m. Find the d2ud,2xluuq7 x(rsv-22) rm 9 khze f/w v+axkmagnetic force per unit length between the two wires.

  What is the magnetic fi6wj 4w;wj:qsrlx71e fxo/p e2.ro-wa eld at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A earwqe .x-:72swop xo rf;1wj4lwj 6/flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What magnetic f/gyzvo-qhmro*2 t q4 +6t, zduield is produced at the center of the solenoid when a current of 10,+ t26v ztozrg-mu*/ q4ohqdy A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. W) v xdk0ldx+x*hat strength 0x k*vx)ld d+xof magnetic field will it have at its center?

  How much current must pass throt wx.*q-.h-t oxq; lmough a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at the ce.; o.lxtx m- *wqoqth-nter?

  How many turns should a 10-cm long solenoid have if gmiuh7s4a6 fw.)i yg ;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 ,ib)t j : 0eu6x8tdd1hhz7ftw120 turns that carries 6.0 A if its dimensions ar 8, d1) t b07wdehu:ftx6tzjhie 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magniz0 5d,/z u xj4nee9avetic 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 magnetic field4 n,z 0ajv9d/eizue5 x?

  A circular loop of wvkrqy 2g(i*s* ire 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.v,s*-bjct:t t 0 A is in a magnetic field of 3.5 T. The loop has an area t*t, -vbcjt: sof $0.12 \; m^{2}$ 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 unik,e(q0cocjio x e46pr(9vhhd1b 2eh: form 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(hr1h,6hxeq :ecpvoj4c i92 0odk( eb magnetic field?

  A circular loop of wire of radius 0.50 ocxrw4w7ob3wqi vfgmjs t5s30uj(81kv9 z 4/ 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 isjwvjqu9 (fs478 5z31 0ksogc4owir3/v m btxw parallel to the magnetic field?

  A circular wire loop y96hdm2k ohtz* dri 7zs20p9cof 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 particlt(iznii b+ *2g.;wnvk e (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 wim.yw. fj 6c-o3mkmfgl -z)z9v th 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 potenth/xe / ;b6fmu gbw jbx s(cmhv3 ns+:pofw*35,ial of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulting5:/jf , vmfx wu(osmh/bncebshg+b 3pw*x;63 orbit?

  A proton is accelerated from rest through 500 V. It en b -b) eui*rfksi8w:h*ters a magnetic field of 0.30 T oriented perpende*f whr)k ub s:-i8*biicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV beforo2gt,o(gw o ;ae tg;,aooo g2 (wentering 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 required if the particles are to be undeflected?