If the north poles of two bar magnets are brought close to each other, tdgo )nh -t7i9vhe magnet7 dngh)vt-o 9is will

  If the south pole of one b bgmo6.g )+0j; vahgzcar magnet is brought near the north pole of a second bar magnet, them0o j);ghg6vagb. c +z two magnets will

  If a bar magnet is divilj+ejv8 t urdle,,*(y ded into two equal pieces,

  The Earth's geographic North Pole is magneticall;k:bdmc3fg c )z-:v ifm,2e/2uwxk o ly a

  The south pole of a magnet points toward the Ear-o23mf 6i qrorth's

  An electric current prog-94v/wgwa ttzcbwt 13 ; 50pqprp 8vcnm4cc: duces

  Which of the following0jphvz 0aec(2 is correct?

  A vertical wire carries a current straight down. To the east of t n oqa2 uqd)i.49a6xmzhis wire, the magn9m. n4 2ixzqd)u qo6aaetic field points

  A horizontal wire carries a current straight toward you. From your point oz 7nrwg9h 9efufqf1(+m)d per c/um8- f view, the magnetizedu ref8f1hgp(wm-f uc mn)+7/9rq 9c field caused by this current

  A current carrying loop of wi b.pjamv34wq 9rl9h4gre 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, outside the loop? The h9 v3lp49wr a4qgj. bmmagnetic field

  A current carrying circular loop of wire lies flat kb*hzl;9n90n z ( vv8znnk cx6on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the directi8h 0zx c*n;nk 9vkzl(nz6vbn 9on of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magneu m obrl;f2 )uqu zmu5/3ni85ltic field is the

  1 T is equivalent tod oa.;4 eo8osb

  The direction of the force on a current-carrying wire in a m;9uorod hy./magnetic field is described by 9 m yodroh./u;which of the following?

  The force on a current-carrying wire in a magnetic field is theg5l(e ga9pk /e strongest when

  The force on a current-carryin6 f8luqyuyu io+581 rav.2c hng wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight u*e rotxijf:k8)* wq b-p in a region where the magnetic field vector points due north. What is the direction of the resulting force ox t:*-o) *8q befkiwrjn this current?

  A charged particle moves and experiences no magnetic for*+wqr-f ziwp/p)s jo/ce. From this we can conclude thaw row/qpj sp/-)* z+ift

  A charged particle moves with a constant speed through a region where a unifok xs9e, 4typ+ y2l2gkjrm magnetic field is present. If t24+xjp k gs ,y2lkyet9he magnetic 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 magnetiynxd0/6) lhgx df.gs- c field. The magnetic force on this-n0d6dfg x/l x.yh g)s particle

  A charged particle is injected into a uniform magnetic field such that its vel*elevx 3yqmm(91- bedb+ 7f ojocity vector is perpendicular to the magnetic field vector. Iv7m +o(3 be1e qbel fjy9xm*-dgnoring the particle's weight, the particle will

  A charged particle is observed travzziiwu)wz;rg) /sa n; +pa9o .eling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the w r9)z/us.a z;z p)oni;gai+wcircular path would be

  A particle carrying a charap 8 n(x. 04um9-)xiyyqafmppge of +e travels in a circular path in a uniform magnetic field. If instea8myx n0ip).9xma f- pp(4qu yad the particle 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 8polmr )+*ikv in a uniform magnetic field that ip mko8lv)+ir *s directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the srm o8iz*rkgdc 6gj 86 +2:atwiouth but is observed to curve upward as the result of a magnetic field. The direction of the mj2rg8i 8:d6wtma kg6cr*o zi+agnetic field is

  An electron moving aq9j:8 upxk9kfx4 ipe(oz9o( h long the +x axis enters a region where 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 zo:qf(x(ui48ojhx kep99 k p9of the page.)

  The magnetic field produced by a long straight current-car96 inn7nwp,m7f u7c1nxfa/gv rying wire is

  At double the distance from30tapz2)6u gpnx hh1m a long current-carrying wire, the strength of the magnetic field produced by thaxu h0n16hgpzp t)32amt wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identi 3z. qw jjq+wyesc/n1 1n4lk8ocal size currents in opposite directions. The wire on your right carries current toward you, and the wire on+yq1l/ cwnoe j4 w18qz s3k.jn 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 six5xv l 9u n+05ycv1txide-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic fieldu1 90x5ln5x +vyxvtci at the point exactly between the two wires

  Two long parallel wires carry equal currents. , 3vre g9cm/mn The magnitude of the force between the w /n mcver9,3gmires is 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 the east. A pro. xkfpuvj67jm k7x fb2 qy11*appc +q*ton moves toward the east alongside and just south of thp+p ub*.1*xjk 61 kfa72y qcvqmxf7pje wire. What is the direction of the force on the proton?

  A wire lying in the plane of c60; j*tx(h p;mdsfwo8c( rh*3oilma the page carries a current toward the bottom of the page. What 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 rigwpd3m 0oa(h8;*jl( otrmc x6fi* h;s cht?

  Two long parallel wires are placed side-by-side on a ge t*-xqf.km2g qm )b r*) 4dss8vsm(ihorizontal table. If the wires carry current in thed*)i m e.q)b8xf 4* 2vsms-mkgtrqg (s same direction,

  Two long parallel wiri2aybg3ip uz7b(1vn c) *qr k:es are placed side-by-side on a horizontal table. If the wires carry cu3bkcvn)igz (: y1iu2*ra b7pqrrent in opposite directions,

  Consider two current-carrying circular loops. Both are made fs54so bzld-l -kl2x+r rom 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 magne2dslk xo 5+l 4lbzr-s-tic field at the center of the larger loop is

  Consider two current-carryin*zlb4xrpa6 + cdn8v z.g 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 moment of the smaller loop, the magnetic moment 8z .v4nclzx+ *a6pdbrof the larger loop is

  The maximum torque on a current carrying loop occurs when t9rb/zf*)pmv)q wd 2ymot;qv d 4uk36ihe angle between the lou)q zd/3p2r4v96fmo ;iw ykdq vmt*)b op's magnetic moment and the magnetic field vector is

  When placed askew in a magnetic field, a currentp bo 5-9vzq rnw:z)v2j carrying loop that is free to rotate in any w-qv5bv 92zpo)zjrn : direction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentialq 8b8(/do3uvd(v 6wao wykim1 ly all electric motors?8 3i aq oo8(y v1uddvwb6k/m(w

  A circular wire loop lies in 8n*lc4 e+ cpsix7, c),fuxrnr4nxu; ua horizontal plane 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 belc ;4n *u,ilp8xx xcus 7e,nrurf)+4cnow 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;xg2jmmfs u; 0 and charge q is accelerated through a potential difference V and allowed to enter a magnetic field 0ju;; mmsg 2xfB, 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 ofuaj3a,uu b8n8/ /utr;v4jdeu 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 bau4 ue8u;d8jvuju/t /,ra n 3a 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 jkx-3 rfc02q huniform magnetic field ohc0 r3j2q-f kxf
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directionnrn:v )4: lbdr 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 whm4o0x3a3wqb,k rkin / en it is placed in a magnetic field of 0.330,bwi/ q kxomar4nk020 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 isj)forc5 -yu f uyp5:s8 in a magnetic field of 0.10 T. What minimum current )cjufyfyr85:o sp5 -uin 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 ,)ff-nmjh -tu+u58 xpkxvqg a8uv4 xgnm e/(7 field of 0.20 T. What is the magnitude of the magn 8f 4 , xx/guj7nmm8fxu -eutp -vnh+v5)(kaqgetic 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 ;vj m085 wi 5ciae(polspeed 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 of ht0.y(qs(o wh6 yzmb0jpjv92 $5.0 \times 10^7 \; m/s$ 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 norths;ko t4ka)s d) 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 with a sknfy (- ; n6s,hxilitylc 7y+pgi:7*rpeed 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 ofe7* 1d dj5/tm1*4-krpk0 f);etuzl pceuqaij $8.0 \times 10^6 \; m/s$ 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 o.i8n*0d-v eq nqrrj g*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. cl q) k-*n x0ofokp*)f What is the magnitude of the magnetic fip ) lfc 0)*on*-qkoxfkeld at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates wha9w5bo :kqskwy+0;;3hf l ppdv t magnetic field at the ground, 10 m awahs9l w+3 y; kqbkfwd5p0v:o;py?

  How much current must flow for dg+yvoph /*r) ii:hf;$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long ss-; kto*ah ju2traight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wirea;j*h2o t-sku equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wis 7 : h, nwn*0vtzofwe2(w7ngkres carry currents of 10 A in opposite 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 and 60 cm from*nn: nw ,2 kfzhe vsog07(wt7w the other?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direction9wc5y)89 ccbck:/h3nd q kan u+jex)r s. The wires are separated by 0.20 m. W )krac8jn:cwu xen/b993hck)qy +d 5chat is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dire2ef:-o jvmfc 19sz3cjctions. The wires are separated by 0.20 m. At wh m:2s3e ffj9z-joccv1 at point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same 5tq:basx 7m3v direction. They are parallel to the z-axis, 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 7xav3m: qts 5bthe other wires?

  Two long parallel wires carry currents o9s0qoi; yvg: zf 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0:0i s;ovqgz y9.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic fields:wi )v y42( cnann.sr66)4voxubkbt at the center of a circular loop of wire of radius 4.0 cm whes nt(vcb4nov.6y an:wir)6xub4k )s 2n a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound znc e;b;0ff-x with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when af-x0 nef;zcb ; current of 10 A flows?

  A solenoid with 500 turns is 0.10 m lon+p fk5y) 6ytnem9 z9jwg and carries a current of 4.0 A. What strength of magnetic field will itw5n6 ) ym9f t9kyjepz+ have at its center?

  How much current mus2 bgc8qa:t,opsk/ w4yt pass through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at t 8sk,qy/2a tgwpc: 4obhe center?

  How many turns should a 10-cm lo3 1;5wt5m)m.eo rwna pnkt3bing 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 rectangular loop d(gn6d;4g xynvu: 3pdof 120 turns that carries 6.0 A if its dimensions arep 4vx:d(y 6ggd u;nnd3 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnet n+ri+jo 0g- fiveh s0d:9,c abt-zvh9ic field of 0.30 T. The current in the loop is 2.0 A. What is the mag teb:c jnaf+hv hr-gd0,9+9 zs i0iv-onetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectvnzn)vxy(7 5 yo4(kxbional 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 a8jzbpn(a70 uvrzy /fkac5 .+ 28mbkbevsur7 ; magnetic field of 3.5 T. The le80zz +m pv .u ;b/c y7j5(kbu7avkra8sbnrf2oop 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 radius8-rt0frkzkjv nhoq 2 fwi1: 37 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 magneticj3hq02r-w k:ff78ntr 1z koiv torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wirebw/ vji s-p los9-r/5b 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 of the loop vl/ob -5i 9p /sbsjwr-is parallel to the magnetic field?

  A circular wire loop ox( ctpxvv eas0.1(uo9m pen+9f 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-chargedg igj93 /xhfkuc(s069ajp5 rl particle (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 with a+h1 /u51h .jttfmdl f * dg8.aziym1gvelocity $6.9 \times 10^6 \; m/s$ 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 moves into a magneti u63nnf9 evnt 3;hpr k8o+cf;vc field of 0.040 T. What is the radius of the proton'tof339;ep;ku6 n+hnf 8 c nvrvs resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magf q5bc8kw7e, unetic field of 0.30 T oriented 7u 5k8,we cqbfperpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated t ym)tvj9ov46ohrough 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 valuet) myj6 o4vov9 of the E-field is required if the particles are to be undeflected?