If the north poles of two bar magnets are brougfghtg*a 5o +9( dbxam x3(ipk:ht close to each other, the magnets 59ak m(i*3xphd: gog+txba f(will

  If the south pole of one bar i1n;jmmw4 vepg *d29mjz :ar7magnet is brought near the north pole of a second bar magnet7vmmjiar1m: gzd e9jp* wn ;42, the two magnets will

  If a bar magnet is divided into two equal pi70pd;/ b)v((hd myw cab at7pveces,

  The Earth's geographic North Pole is mag:q6s 9m qbcv4wnetically a

  The south pole of a magnet points townn:27 ,xl e9g *r32rc;dqzg,dq fjawpard the Earth's

  An electric current prtw1;u2ho, m c mba2mr3oduces

  Which of the following is coif35szs.u bd*+ wexj.3(u hnarrect?

  A vertical wire carri9vw j,5q qq;y efc/a2ces a current straight down. To the east of this wire, the magnetic fieldc,5;9jcf vqw eaqy2/q points

  A horizontal wire carries a current straight td8z4r v4yilph8u44 y eoward you. From your point of view, the magnetic field caused by lhp84u4 vz 44r de8yiythis current

  A current carrying loop of wire lies flat on a table top. Whew* .kqm0k5mg+)2+vt boerzg 3vq idr ;n viewed from above, the current moves around the loop in a counterclockwi *. 5grrdb wtkgzomi +q 3+02kv;)meqvse 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 liesd:dpm +mp 9+hb3n7g rh 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 magn g++pdnm:h73mdrh pb9etic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field aqoxnsa7. h63 is the

  1 T is equivalent todyyu k7p, m8jz; goh6;

  The direction of the force on a current-carrying wire in a2y.um( :2gu0 vb7izp 7bsu;l bshuic6 magnetic field is described by which of t.g;yb2 sivmiuu pl7b2b :uzs06 c7 h(uhe following?

  The force on a current-carrying wire in a magnetic fietm(-nj u;rbtq) u, -xgld is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero o),ntv0 pgm q)pvmg-8when

  A vertical wire carries a current strai:wbfr):u ope6(1afat ght up in a region where the magnetic field vector points due north. What is the direction of the resulte1) f6wab(t:u:poaf r ing force on this current?

  A charged particle moves and experiences no magnetic force. From(*dm 2ag zdo+p this we can conclude thamazo(d+* 2gd pt

  A charged particle moves with a constant speed through a xs w2m2ivd4g/.pk7db region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this partis2pw/d .g v2bi4 dkx7mcle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic f qbforf-k:t)zq+f m-sgi-( 5sorce onis )ff+bsqtok:-qf gm-r -z(5 this particle

  A charged particle is injected into a uniform magnetic fiel(;nnm7h .n q thx+y:eld such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the pmny. h;en(7x nl tq:+harticle will

  A charged particle is observed traveling in a circular pabv sobw tehvb4)xbb-.bz 282 e*7 b4nuth in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of thzb2.*e27h 4 bbvtsvbex o8b-wun 4b)be circular path would be

  A particle carrying a charge of +e travels in a circular path in a uniform ma0l:w a2 bvzxk d4(jdo*t)prk(gnetic field. If instead the particle carried a charge of +2e, the radowdlka:b(x 2dpz0jk*)4tvr ( ius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a unif:gj z225miglhgm)rs: orm magnetic field that is directed strg25):gmj sg :i zhlm2raight downward. The magnetic force that acts on it is

  An electron has an init,3 a q+ ayoi5hv)2kyvyial velocity to the south but is observed to curve upward as the result of a ma ,y qhyo52akvi ya+v3)gnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a regionnv6v*gd+c g/;qk8*1 wc xoozn where there is a uniform magnetic field in the +y 6nc*/ oq vw+;1ngc gv8zod*kxdirection. 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-care- mm6: p5bkjp 6u(nkvrying wire is

  At double the distance from a long current-carrying wirepgrwq ;*7 -b z3qjx9qv, the strength of the magnetic field producergb3 9 pqj*z7-;q wvqxd by that wire decreases to

  Two long parallel wires placed side)qad i29n 31 0kjgpywl-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and thepwl0d913) jyknq2 ga i 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 h- sosir 79rtu8orizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the two wire8uit rssr -9o7s

  Two long parallel wires carry equal currents. The magnitude of s- z 3 kuzc/gxk6jlq2)the force between the wires is F. The current in each wire is now doubled. What is the magnitude of thukx3c zjlg/)2q s6-zke new force between the two wires?

  A long straight wire carries current toward the east. A proton x qz5c/ vbz2okb bz74b8) .lnzmoves toward the east alongside and just south of the wire. What i2nclxb k4 qbb vzzz7z5.bo8/)s the direction of the force on the proton?

  A wire lying in the plane of the page carriv4o(3ax( nkhz es a current toward the bottom of the page. Whatxovh((nz a43k 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 placed side-by-side on a horizontal table. If the elt35:r x hd3/roi-:gfp 2 aotwires carry current in the same dir r5dh3g/ioto::p2e-ra lt3 xfection,

  Two long parallel wires are placed r2sg/shp j/a, 1zhuk :side-by-side on a horizontal table. If the wires ca2s u sagrj/,: zkphh1/rry current in opposite directions,

  Consider two current-c+jh;0nrdsg ;nup:q b:arrying 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 magnetic field at r:0bnqu+: ;gnj; hspd the center of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops.ey4z yvyx- qi ,8t,jq:,1 wpnv 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, ttq1yev:8-jvp w,zn y, y xi,q4he magnetic moment of the larger loop is

  The maximum torque on a current carryin -(2)yh3 o9r*kdif-* ndm4g9uf zewolvi q +ahg loop occurs when the angle between the loop's magne-f+zu l3fm- r2yo()ow9eh d 49*kidqvaihg n*tic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free m-najco 88u0h to rotate in any directiomn -uc80a joh8n will experience a torque until its magnetic moment vector

  What fundamental fact underl gf. oksq i6,q 17n2r2b6sit1mbew)do ies the operation of essentially all electric motors)b.k2sfmesb twd ,r n1o6 qigo67q1 2i?

  A circular wire loop lies in a horizontal plane on a table and carries curri1f4t4 o* f9cb jt/mqrk r;1cgent in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and dips11 fc;t*4 imqfgrbk4tjo c9/r 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 particle of mass m and charge q is accelera0:,egu ybnew +ted through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular path of radius Rbg0eu:nw+y e,. 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 through (i bs2jle2d, l;.w:dbbe+ wfy crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only particles of a certain velocity will move id w;s 2l:yd(ee b2.f,+jblwibn 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 a c59fkn, am0a73uh mbbqurrent of 0.60 A is oriented parallel to a uniform magnetic field oh 9a3mq7 abfmn,k5u b0f
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direcc2w kxaj k5jtdgoo23*-7x( dt 7o;fbntion 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 metj3f5w y8ceoz fgps*,,er on a straight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makefz g*e3c, fo,5j8pwsys an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0n gtwt 8ddl+90 m long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum current id8nd+l90 gt twn the rod is needed 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 is the mxib qnuz37+/u 9drpk n.u,ca6agnitude of 7iu.bpq n /u,urcka 9+xdz3 6nthe 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 jcq1nsg:y5/7jzxk 2wz7q hr/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 sp/air 14jteh:c:5s mcs eed 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 withc: ic)u:ttq;2q9 jbzj,f tfn + 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 of 7 ;p zyjb/(v.un5ahn6kr s7my$8.0 \times 10^6 \; m/s$ 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 spee5 j0b;(o;kanbjp 9pd 2ufp du7d 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 o6 v5zy s:uq-auf $3.0 \times 10^6 \; m/s$ 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 dro+ fc5*r*qdf1xv.wthe magnitude of the magnetic f+*rfcfvrqd 1*.o xwd5ield at a distance of 0.15 m from the wire?

  A high power line carrying o-;9m /0u lpgx3d unhj1000 A generates what magnetic field at the ground, 10 m awa-up un o3ljm h;x9d/0gy?

  How much current must *f)a7+bsuqfz/q:f.4 vk x8jgnr d yiis0y: z0 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 long straight wire carrying a curren +z :c.rbubvk5t of 5.0 A is the magnitude of theb:. bzvcur5k+ magnetic field 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 wires carry currents of 10 A kv4* j-y/kjsv in opposite directions. They are separated by 40 cm. W* -yskvjv k4/jhat is the magnetic field in the plane of the wires at a point that is 20 cm from one wire and 60 cm from the other?

  Two long parallel wirli c:1thxce+ l)/m,rres carry currents of 20 A and 5.0 A in opposite directions. The wires are separalx,c1r+m/letr c )h:i ted by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite di .xplk se,0 1 ic4jj6)wjedkwxe*8j2orections. The wires are separated by 0.20 m. At what pos.j 1 xkl dc 4kee) w,x*j6we8i02pjjoint between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the sabdnqu)j 2fwr0g04 qi hq71,xi me direction. They are parallel to the z-axis, and they pass through the corner10 ngibi2qfr)w,j hdq04xq u7s 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 3vb.dv8wyl-m carry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic ly8.bvv 3d-mwforce per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of radius 4.xe 7u*50x1s:n:b lb bvl3ft5gvqkb 9m0 cm when a current of 2meqgl 35t lbvs 9n 0k5xbb b:f*u17x:v.0 A flows in the wire?

  A solenoid 20 cm long i0b-;hg2z gjjfp *7q ixlcp (9es wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid wieqlgjb x j07gp*( cf2z; 9h-phen a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and tijj*yc 140-aygbo ikcmda+ 1*es8d+carries a current of 4.0 A. What strength of magnetic field will idgj k1diey+oma1y-0 b sa4j+c* tc8 i*t have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long u) 0qa4x tqd zen*/h/yto generate a 1.0-T magnetic field at the cen/xqd4)ty*/a h0zuq enter?

  How many turns should a 10-cmw3ewn jiv p45- long solenoid 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 rxf1 j ,sd aqbf.:+l9jhectangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0a 1j9h:.dfx fbls+qj , cm x 8.0 cm?

  A circular loop of wire of radiudu9w b-we/d u7s 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 whuu7-9dd/w e bwen the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectional area (;t w5tbh8a5 rbhh(y5vi ak2a $0.12 \; m^{2}$ 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. :ytgd0 /3 j-jgzst dt6 The ztt /0 - 3jsj:ygtd6dgloop 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 m is in a unifem yof( t19q+/ /.tlf kv7zd6jarh5ygorm magnetic field of 0.30 T. em+ad/79rj/ l(gqv1o6hy5tf tzk y . f 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 field?

  A circular loop of wire of ra, :p, 1 cgr8yac r0ub derw.89cyyeln8dius 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 magnetnpu a rlercyy89ry.b8c81d,:,gcw 0 eic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of 0wt h2 hblf9p -vm*qi)x;y1uqarea $0.25 \; m^{2}$ 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 parlyhmtpxot;j y9+ +:otx9nei0o -49 gkticle (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:j(a a)o5dd 1ydjm op)k r-) b08hupfs with 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 pot wzw rpsf a h)jt*z618tnq3/u5ential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius j afwn)z* 18r /h3sqzutwtp56of the proton's resulting orbit?

  A proton is accelerated from rest through 500;5 is/x5f o.bm;wd*m0ub sjvjh on9+p V. It enters a magnetic field of 0.30 T oriented perpendicular to iw jmb. ouxv5m /s0 ns9fdih j5b;*+po;ts direction of motion. Determine the radius of the path it follows.

  A beam of electrons im r8 xwafkn3/f4vo9bql/o/d7s accelerated through 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 v /nfv9modr7q //3lw fabo84 kxalue of the E-field is required if the particles are to be undeflected?