If the north poles of two bar magnets are brought close to each other, (w4wws3lvc ./p ej 8xcthe magnets wilpj38cwe (wsc. w/v 4xll

  If the south pole of one bar ma k ne1fo(55fk+jtvc+ignet is brought near the north pole of a second bar magnet, the two magnets fc1e(i+vk5t j nf +ok5will

  If a bar magnet is divided into two 3 (-qy-d z.b v,mwbyf svsf5hx:adl:5equal pieces,

  The Earth's geographic North Pole is magyriu,-pg5gf b ;)z) ksnetically a

  The south pole of a magnet points toward tw5v9jnm ait8;e.j v b7he Earth's

  An electric current 9 h5mm1eqp6* sdem51kufen z2 produces

  Which of the following islw yaw9j ch6+6rh qs99 correct?

  A vertical wire carries a current straight down. To the eastvc-26f,xwj cz of this wire, the magnetic field zc-f, cj6v wx2points

  A horizontal wire carries a current straight towarfo-em/0g8tg)zw qrder82 1la/ x fn.pd you. From your point of view, the magnetic fieg2) ednfr 0mf8wg etz qo8 .1-/axprl/ld caused by this current

  A current carrying loop of wire lies flat on a table top5pmn3 *2; nqrw phfrj4. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of p;w5 prm 3hr2fn *jq4nthe magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire/5b7 cwzor0q ikv;w wfm hv3-l*9.ysd 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, inside the lkvlm90 bfv wq- hz*w.r3;5c yio w7s/doop? The magnetic field

  The SI unit of magnegx5 a+aiz(q4ptic field is the

  1 T is equivalent to: f rbqs2cxbm8-hd4j v,wak4, 0vcoft: 3h9tr

  The direction of the force on a current-carrying wire in a magnepy7. xrhve5q .ckk 1)ctic field is described by..)exy17 vqr5hckkp c which of the following?

  The force on a current-carrying wire in a 8;fyk fx6lm2 jtzp6efq9,:n h magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic fiel)p;ilqhxb+- h d is equal to zero when

  A vertical wire carries a current straight up in a region wzkn. qj,5)tx fse k/y1here the magnetic field vector points due north. What is the z)sk t 5fj,yx/1kqen .direction of the resulting force on this current?

  A charged particle mo :)kwtl66z2ndgro 7iives and experiences no magnetic force. From this we can conclude6tg7 :ik loi rz)wn6d2 that

  A charged particle moves with a constant speed through a region where a unifosjh f 6zhyw6 0.rn+z2spij +n0rm magnetic field is present. If the magnetic field points s h.rwjzy2fs h 6siz+nn6 0p+j0traight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The0nptr snv p*+8dqzq/ac 9h91h magnetic force on this particdpz vnnq0ta+1 /p9ch* qsr9h 8le

  A charged particle is injectei:) f0l 9d.ulzayd fc6d into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the pa0 )azfy:. 6fdduillc9rticle will

  A charged particle is observed traveling in8 zwg9bh blvc8s/c+q8 a circular path in a uniform magnetic field. If the particle had been traveling twice c 8vchzswb+q8l9/ b8gas fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a civkgthnn/ 4ih*n-)- wx rcular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path nxt-* / )hwivkn g-4nhwould have been

  At a particular instant, an electron mov/*m8*q8 wydnxa:fz oh es eastward at speed V in a uniform magnetic field that is direq o*hn *y8z:af8xw d/mcted straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obse edu:+* 7zm o2atzwau:rved to curve upward as the result of a magnetic field. The direction of th + u2auez: *zdmowt7a:e magnetic field is

  An electron moving along the +x axih )u s9ps(mqlsgmb8(t2az*j7s 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 +z2sp*gs(jlth s (8z9ma)umbq7 out of the page.)

  The magnetic field produced by a long straight current-carrying wire nza3:ar*/q y uis

  At double the distance from a lorx1ysf gup5q0 lb ( 4nbm7:v*mng current-carrying wire, the strength of the magnetic field produced b:u fvxp01lbs m(r5nmgy4qb* 7y that wire decreases to

  Two long parallel wiresr:,m*qr.n75:9(u uo 2:msokle5aff ht mg ecv placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your lmev2:r gqtms ,ocnr:*5ukof( aeuf .:m 957h 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 si0 ej5ln5urd8nde-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic fieldr8u05 jn5nedl at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the for 1gqby(t cp*)h400gvnuzw kk.ce between the w4 qtyuwvkbkg.n(1g00 c) p h*zires 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 proton moves towariydyy: yeq y6:l.)gk;pfr7.vd the east alongside and just south of t7y : eykl..yyi :dpvyq ;gf6r)he wire. What is the direction of the force on the proton?

  A wire lying in the plane of the h; bptzwdy-j3-uc() spage 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, a) dyb;ctjp u3-(-szhw lso in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizonta * 3bzav kzg1;50vfvxvl table. If the wires carry av5bzv1xvv 3fz *gk; 0current in the same direction,

  Two long parallel wires are placeqe olt,c2zs8ik 17 h9ud side-by-side on a horizontal table. If the wires carry zkt,ci eu7918oh 2qslcurrent in opposite directions,

  Consider two current-cart ae40 bg6 0k)xu0tohn+ ukb*orying circular loops. Both are made from one strand of wire and both carry the same current, but one has eo6b b an+*kox 00th tuk4ug0)twice the 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-carrying circular loops. Both are made from on8kiw+ e(u (kjwe 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 the larger loo+ 8(e(u wwikjkp is

  The maximum torque on a current carr1avp6-,z mmbec:xx +t ying loop occurs when the angle between the loop's magnetic moment an pebamx6 +-cxz,:m1 vtd the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that.,5p i(dv sfsq is free to rotate in any direction will experience a torque until its magnetic .fipq v s5s(d,moment vector

  What fundamental fact underlies the operation of ek,eya ed.s*n4s / g0) vxoa 6rtkyj5v-ssentially all electric motors*nv)v akedjo gy.5k/s-s xey4r60, t a?

  A circular wire loop lies in a horizontal plane on a table and carries current iqqz 7dgb 1 g4etm8k5d5n a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field poi dt5zmk1 5ebg8gdqq74nts to the north and dips 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 maa e 0al 58nt8 +2vcq7ysjwv2xpss m and charge q is accelerated through a potent85e vn x sjpwqc20aya2t8v7l+ial 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 terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing through ca wiab)g/5 hmtko 31s.rossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and onl ba)g . thoswm1a53i/ky 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 current of 0.60 A is oriented paralleyhbo re 554z*k7n(zh6 h ou)dbl to a uniform magnetic field rh7eyz(okzu ) b5b*h 6do5n4hof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction 1d (w;6infv tz)ib:zs 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 when it isv )6bb 9flpbx4 placed in a magnetic fi bp4bb9)fx l6veld 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.;*2f3fww:8a j.1enq8oiho cf u wej,o050 kg and is in a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the weig,* h:un3fi 2c8qfejw1e.afojoww8 o ; ht of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. Whage;chc 9ey k30*f8jyn aek0r1t is the magnitude of the magnetic force on the proto;y9 je1n00g*f h 3arke8ecc kyn?

  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 wit5quwl9f3bxilr(y ()s h 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 zmdfs *:wxqu:)(4cm;jt ; mdba speed 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-qs v)wpfrt 2 dyaulu0+,-8hu due 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 a7n2nsi;p vyo9 )nn ;9k(fiwo3way(bf 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 spee)oqctx y-)vwzw 000r ud 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 mnw ),e h2u1brs0m+ff of $3.0 \times 10^6 \; m/s$ 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 currenlu h1ktkx)0bvs3 (pg7t2j ss90(kh7ymuc j w8t of 25 A. What is the magnitude of the magnetic field at a distance obu)p j0shlsg8(ts7w27t3h cj19vk k 0 u(xkmyf 0.15 m from the wire?

  A high power line cari:,i+n vaz,bij -oh ejp-nc 5ju0pg91rying 1000 A generates what magnetic field at the ground, 10 c ne0pig:b,z , 5-on9phjj 1ijavui -+m away?

  How much current must flow fb3t /pz.p.6p iop ho4nor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance fromq2 y-eqq:e3nq 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 of the Earth's magne qn e:q2-3qeyqtic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 h 69spzy8dd+l cq6 udhm5hh3 2A 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 t 9lms6 6d8u+c5p h3hz hddhy2qhe other?

  Two long parallel wires carry currenxz7sq j(dhb3sgmq l2v .9)o;dts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field3jmsldxbq(.7g sz2 9ho v ;)qd midway between the two wires?

  Two long parallel wires carry;0kl1u +v5ziwh w6uze currents of 20 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 contrib5li;6k hwuu+evz 1wz0utions from the two wires the same?

  Four long parallel wires each carry 2.0 A in qg:hc e49abe71gy zv:7wrp.qs8 ( cnh the same 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 tyhbw7ch8z4 sq7:19a . qnc(ve pgg r:eo the other wires?

  Two long parallel wires carry currents of 5.*nkyzp3tj. 1krr/n2y eqqe +.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic forrr2+ *jqk.3/qky1pnz n.ty ee ce per unit length between the two wires.

  What is the magnetic field at the center of a circula(sd ;ab8yan r1czgg4og5 (w9nr loop of wire of radius 4.0 cm whenac; z8gso n1agg(bd(95y wr4n a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tu w zj2e(av5s.kbvn- r0rns of wire. What magnetic field is produced at the c ra2vwsk. 0j5b z-n(eventer of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a curqbu, d,x ksv0s d-t hbb+,3vu1auc0n8rent of 4.0 A. What strength of magnetic field will it tdus0qb3 -bax80 vn+uk shbdu, vc1,,have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long 0ow1q3s8e65xg.h y:vsj rfiito generate a 1.0-T mj3h:6.fs wr5qvx0o1gysi i e8agnetic field at the center?

  How many turns should a 10-cm long sol zh0*t kjg(js0enoid 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 momew6qu-e am. aigg)ynxstm /+-8nt of a rectangular loop of 120 turns that carries 6.0 A if its dimens- )ens8./g i+q at -uwmmyag6xions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 mjpxb 91re lt:5 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 is perpendicular to the matl:pe j 591bxrgnetic field?

  A circular loop of wire of cross,l bzd9p 4-8*m wfllce-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 fieldu3/p)vmo ,qmh 9ym sf* of 3.5 T. The loo*)39opyshv umq/,m m fp 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 ma)/+lb*tbae7b b/3 u hyxdo* gcgnetic 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 magnetic fiel/oe buab* y c +/b3dh*7)blgtxd?

  A circular loop of wire of radius qpy; *lxhnfgp: +4n*f 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 x+: **lpnh gn4f qfpy;torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop z5 a- gr7mt pv0,:gttf4(kb4lfhy vy4of 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-9 ztc9;yc,gtscharged 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 w8kjx xtmg8w//h7 c2fcith 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 potential of 1.0 kV and then /q zxrkpw)-0 rmoves into a magnetic field of 0.040 T. Whqrxkw )r 0/pz-at is the radius of the proton's resulting orbit?

  A proton is accelera bx (7b 1:k6ps 2jre.dmv5othnted from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction okm pbtse(7j2 d v.:1bor5hxn6 f motion. Determine the radius of the path it follows.

  A beam of electrons is acce9 /o7*3cj 7yydkagze nlerated through a potential difference of 10 kV before entering a velocity selector. If the B-field of the vg7kzj *cy9/o y7nda3 eelocity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?