If the north poles of t 0fgkufg2f8.l wo bar magnets are brought close to each other, the magnets wil2fg f8fk0l.gul

  If the south pole of one bar magnet is brought nea8ts0,r l0 211cspjs8lt:cjg fdvyr 1s: kz/aur the north pole of a second bar mag:r/tcdy,:lk 0a gvss1st fjz 1 lc1srp0j8 u28net, the two magnets will

  If a bar magnet is divided into two eq - qxlxws(jtldfq*6 (8ual pieces,

  The Earth's geographic North Pole is magnet:hluu:sdrd)8uee; 6ziof ;-f8 5dl gwically a

  The south pole of a magnet points toward the Earth's y/mbggpbh* m9,:3 oa lo4nun,3c 9xvn

  An electric current 23be)h 6hl 1a39ob amtj7etheproduces

  Which of the following iq)0.gzfcw na69 36m5rbqo edy s correct?

  A vertical wire carries a current straight down. To the east oft4bko.ei, p2a this wire, the magnetice2.o,4 bitkpa field points

  A horizontal wire carries a current straight toj ut *:jd76cjeward you. From your point of view, the magnetic field caused by this cd 6 j7:ejuc*tjurrent

  A current carrying loop of wire liz 9mdq-va1)pt5p2e.7 odlk-:lhju swes flat on a table top. When viewed from above, the current moves aro5-edmh 9pvu 1p2jw o7dtls aqlz:-.)kund the loop in a counterclockwise 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 51re.vyne -ek 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, inside the loeey.k5vn1 r-eop? The magnetic field

  The SI unit of magnetic field is th4n nxn7): bxaoe

  1 T is equivalent toph-t 9in3 zjx2

  The direction of the force on a current-carrying wire in a mat 8 s5kcjjg74v*rvsc 9gnetic field is described by which of the following?t7scs*495vrg j 8vkjc

  The force on a current-carrying wire in a magvr )k- 4uff+ cu m2ta062ekw4v vu9qmgnetic field is the strongest when

  The force on a current-carrying wire in a rm zqocry1 5.z 3ooqkp;v91,omagnetic field is equal to zero when

  A vertical wire carries a cur5wplavi,-5txe.7nrhx*o x3yh8 3e ke rent straight up in a region where the magnetic field vector points due north. What is the direction of the resulting -x7.85 *xk 3h vryeinax5hwe t3,eopl force on this current?

  A charged particle moves and experiences no magnetic force. From this we ixn9l5) h: rj7s yc)ehcan conclude te:c)jrn)x 5 79lhsyhihat

  A charged particle moves with a constant speed through a region where a j2 18otrkvjl4h xg4f6 uniform magnetic field is present. If the magnevftjghk 1l6 2844x rojtic 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 fo-z5h8w bvs.xq) c9sho4n ks c0rce on thiqs)0 9 cv.bh kc8s4owns h-xz5s particle

  A charged particle is injected into a uniform magnetic field such /sbe w8r.a),w luu,i nthat its velocity vector is perpendicular to the mw w r)iab8/sn ,u,e.luagnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uj7sr./ny9q6z* zf+0tnndom )qkb r z 0niform magnetic field. If the particle had been traveling twice as fast, the radius of the ci.dmy+0j t )k7zrb nz96 qfn0/qz nosr*rcular path would be

  A particle carrying a charge of +e travels in a circular path in a uni9 pr 0ctvt 9db-wu96giform magnetic field. If instead the particle carried a charge of +- 0 ivw999c 6rtbutgdp2e, the radius of the circular path would have been

  At a particular instant,uy v g.*2zjj:y an electron moves eastward at speed V in a uniform magne. jj2zgv:u* yytic field that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed tjzfd22d/qfhz4y 4c0 go curve upward as the result of a magnetic field. The direction of the magnetic fcqf4j yg0d2zhz d/f 24ield is

  An electron moving along the +ta7glrgc on/*,be+7q+4n w fbx 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 of the n7g a+ g7ct4b lqw,+nb e*f/orpage.)

  The magnetic field produced by a long straight ct lm ijtok(c fekkh.+p/ 0;:v0urrent-carrying wire is

  At double the distance from a long current-carrying wire, the strength qhriaq) jp; sv 1ioq27(o -mo3of the magnetic field produced by that wire decreases to(hi a;q qo7v- 2msioqp)or1j3

  Two long parallel wires placed side-by-side on a horizontal table carry identiv-gs iu5 5(g13)x ew9 peoznsocal size currents in opposite directions. The wire on your right carries current towar95- uoxs5se i1w3pe)ovggn ( zd 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 plack6dyl/t)rni ; w2hq/ugtb q/nky) w/7 ed side-by-side on a horizontal table carry identical current straight toward you. From q/t i n)27 drl)hwb/ ku/ /gntyqkyw6;your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents)//ap51vlngv ddsp g :. The magnitude of the force between the wires is F. The current in each wire is now doubled. What ip:1 ga gd/pdnvv/s)5l s the magnitude of the new force between the two wires?

  A long straight wire carries curren+h w8vpl4(scl 79) ymmyz h+yat toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on h 4h9 vllzm+ya+y scpwm y)87(the proton?

  A wire lying in the plane of the page caa4b*m wr*k +yarries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularlr ma4*+kb*yawy 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 1 ev nli7)4dk(u f+y9ztnu-xpwires carry curre()+nu 9-fn7zl1i4xuv d e tkypnt in the same direction,

  Two long parallel wires are placed side-by-side on a horizontd w si.8t v+0id2yixs6al table. If the wires carry8diyv.ts0i26i wxd +s current in opposite directions,

  Consider two current-carrying circular loops. v n rxq-khv)*6p1gw):u vqiuow)w5 5g 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 o5wko 6*qgwiwp)hnu )v5v v -r)gq:xu1f the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-car (qm a/ldl-6a,j8f+af/jzx eio jns4,rying 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 of the4aax(soq/dm6 / j ,lffza -nj+ ,8ijle larger loop is

  The maximum torque on a current carrying loop occurs when twemf ;/* u 4((wokrxyk* l/gjvhe angle between the loop's magnetic moment and the *ku;wl/ w(*r4(ymvfoe /kj gx magnetic field vector is

  When placed askew in a magnetic field, a current carr 5nl.)h (h uv8,qhzqwfying loop that is free to rotate in any direction will experience a torqu) u5.zq(qhh h8n fv,lwe until its magnetic moment vector

  What fundamental fact underlies the operation of essent-oc:1ggte li )ially all electric motors?g1-t:o l)eic g

  A circular wire loop rp(sj uh/j55kuj( jl/lies in a 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 below the horizontal. Which side of the coil tends to lift off of the table (p5r s/k(jujjul j5h /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 ptkr t3)cx yft+6l+e d8l)gs- 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 )6t8 c-xktgdll)t y epf+ r3s+for the mass of the particle in terms of B, q, V, and R.

  A velocity selector co8yr hbv6 eow7puc(sairpo:r8p6 , 16insists of a charged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, a,pc (r uriosrv6:w1bp8p hyoea7 6i86nd 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 a currenzg ovk1ldx12(z(eut :t of 0.60 A is oriented parallel to a uniform magn k( l1te1ugd 2vx:zoz(etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction of ra5tx4rlth6: bg-x2 y-j6d t u$30^{\circ}$ 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 carrf:+urqh3y+ef2f95 smckn6 aj h i4yj-ying 5.0 A when it is placed in a magnetic field of 0.020 T? Thefjyq+5 hke9snrjca+m i:-u yf36hf42 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 magnetie69y4g)auc2ctps 6ef c field of 0.10 T. What9sfuptc) ec a662ey4 g minimum current in 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 tl2r b7ppeiqr+3,a x p;he magnitude of the magnetic force on the protopri2 eq;r, lp7a +xb3pn?

  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 ogqlwq2f 5qa zi;; qt52f $5.0 \times 10^4 \; m/s$ 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 speedh(slva p23qw *uek)9f 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 duexc 0w*ec (ho.m du6wy) north 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 0 fio6g yg;:sld)mhek g81 y2ua 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 spw+ h(l gdxf*-p4chq 8keed 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 oczvjta0 m6fx kzamw5k77 *0. yf $3.0 \times 10^6 \; m/s$ 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 ahtd10wwinz-:+j9y a y vf7c 2o current of 25 A. What is the magnitude of the magnetiywa:-w97+doc y h0 1i2jfvzt nc field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what mape fry-3 ;l2ykgnetic field at the ground, 1yk2 3f-; pleyr0 m away?

  How much current must flow for ; +o jujty ;cc:/i.yypt,b5ob$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carrying a current of 5.0 A is the m:cq(mcmp7 np/ agnitude of the magnetic field due to the wire equal to the st7/m :cpp(mqcn rength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires car nu dzv4qd2(mu*mh9s 6ry currents of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in t9u sd*h2m (dzqn6vm4 uhe 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 of 20 A and d9edtk1(*ea6 y8hi du 5.0 A in opposite directions. The wires ard euk19e thydi8*6a(de separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wiressd2b .e;9 yjqzn- g+ed1 .wxre carry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point betqjnz rb .-dsge+ex wy; 19de2.ween the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the -1f/gq( d dfyjsame direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned ij/f(q d1f-d ygn 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 didsdim p5a)cfy8secr. *:77z0u u*knwrection. ukc 0m*5a.)sdrn7 z*syi f:87 up dwecThe wires are separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magneticpseq4eubw25 c ,,hzr9 field at the center of a circular loop of wire of radius 4.0 cm when a current of 52 pz9ce e s,rquw4hb,2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wirtau 5ig3w8p paf52 1rzlwo3r5.q/rc be. What magnetic field is produced at5ctrl a.ur3za wobq8i5pr2g/ 5 p13fw the center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4.0 A. Wha7bjzq(b)wpdx2 x-n;z 2kng5at strength of magneti(bkad j2zq-5bn 7p2xnxg;)wzc field will it have at its center?

  How much current must pass through a 40 -5 9w2t .dlb*lqqocq v opvr8pb+ic/60 turn coil 4.0 cm long to generate a 1.0-T magnetic field atl/p r-wq+v t5bv l i*28qb.oc9pqod 6c the center?

  How many turns should a 10-cm long solenoid have *ew0dgnfwt+- )+ztqj)t1et h 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 carries 6.0kxk8yis x3tkf v;)1(e A if its dimensions a3xy1kfiks 8ek; x(t)v re 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniformyq,li5 dkop:s0f v f3/ 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 perpendicular to the magne f5/: ,qoi0 yfdlsv3kptic field?

  A circular loop of wire 5- e**gtwqtoiof 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 2.0 A is in a magnetic field of 3.5 ;q1nm7lbm9 .8t grfy*u- ftbyT. The lq9fbglyu 1n*rm tb8m7t-f;. yoop 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 uniform magnetic field of e i 3m7i6 a: 4ufa-jhdx(vo6ej0.30 T. The current in the loop 7jx6 u:jm a-o hv4de3ii(fae6is 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 radius 0.50 m is in a uniform magnet v08dcwq37 cqkr+j;czpm gf fz())r.sic field of 0.30 T. The current in the loop is 2.0 A. What is trp ) z.q m)(+cck80cz 37wfvfq;grjd she magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area 0/qg2os ,bmkk $0.25 \; m^{2}$ 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,hvfsu3 v8 f/q5 a single-charged 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 ion0lf-36 tb6j4 odyn9bu:jvu jl 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 throy6/viv4 aelc ( xlq2*r2uz x*vugh a potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What2 c leyqvux42rxvl*z/ v(i6*a is the radius of the proton's resulting orbit?

  A proton is accelerated from rest g dm j7:)++ o*tabvrgythrough 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to jtdv7goy+)+r a* b:g mits direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differ *z .q 2hupog gv)by5ntc*2;qnence 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-field is yuc);z2n5qg*ot. pvh2 ngbq *required if the particles are to be undeflected?