If the north poles of two bar magnets are brought close to each other, thel wg bb4s3. n6;rn3-iim5hbk9zg+i cm magnetg h+m-zi39;b3nmwi crinbgs.45l6 kbs will

  If the south pole of one bar magnrs;bw37 jgwyn; h/ k.cet is brought near the north pole of a second bar magnk7y .g3cj;/whnrwb s; et, the two magnets will

  If a bar magnet is divided into two equal pieceeuwozy ,z +:a-s,

  The Earth's geographic North Pole hngg(k5q 0p6w -uog (his magnetically a

  The south pole of a magnet points toward es -hirjn 8sm+zi av:ky5veuhq4v a1/2c+5t 7the Earth's

  An electric current productc1:f+ c n zmiy 7tymzy6e)-d9es

  Which of the following is c7 tjyj;n5z4xwn 5uh2horrect?

  A vertical wire carries a current straight down. To thepj)ir)oo q*-w east of this wire, the magnetic field po*-rjio op)w)q ints

  A horizontal wire carries a current straij yy5gfd )hk6mux a2p+q0-xn*ght toward you. From your point of view, the magnetic field caundmpyx-f6g5y hu)* 0+kqax 2jsed by this current

  A current carrying loop of wirajngyz 2y*ap)a 26)qfe lies flat on a table top. When viewed from above, the *62) 2qapnajzy yg)afcurrent moves around 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 od1 o7q.(vwvl 2,qpjhh f wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What iwd1 (l hoq. 7hj,v2vqps the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is t: wsmgxl hc6 yc26v1v3 5v4qqshe

  1 T is equivalent tom 64deij u/j5(vron4 w

  The direction of the force on a current-carrying wire in a magnetic;h *eq-mdyjv -so 40jc field is described by which y;4csod qe-j jv*h m0-of the following?

  The force on a current-carrying wire in a magnetic field is the strongestp b:nm qm vp-j9(1jhpm82gyz) when

  The force on a current-cdpi8dw:9 as)a arrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region whe b6;zn1b-n(q uw nh6swre the magnetic field vector points due north. What is the direction of the resulting force on this curreun6;nqw (b wn1b6 zsh-nt?

  A charged particle moves and experiew5*bfv2u l(n; ; rpyzwnces no magnetic force. From this we can concwzbun*;w5;y( rf lv2plude that

  A charged particle moves wit.qa,tc dog9x kg7: rd:h a constant speed through a region where a uniform magnetic field is present. If the magnetic field,actgokx:grd d :.q97 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 vsd;2 ao8+h tho h 8ovha2sd+;tn this particle

  A charged particle is injected into a uniform magnetic field such t+va9;e nf+8n e;ktjf yhat its velocity vector is perpeev+ f8 ;nn9;jfyka+ etndicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed mv3tadue)* 3dpy d4:5jvbuw*traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wou v*adjw*v3u5)d t:ym 4 uebd3pld be

  A particle carrying a charge of +e travelsyl d4vrb-. .ow /heykbpe,41v in a circular path in a uniform magnetic field. If instead t yevr/hb ok-wb1.e,v l.d p44yhe particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward a5)m6a9zy m smwze( t 7l zsk(s*d)dr)nt speed V in a uniform magnetic field that is directed a7(l9*yzre)sm k nmz5t( s) 6)dzmwdsstraight downward. The magnetic force that acts on it is

  An electron has an initial velocity to t)6l;8y ggsr 93mtbmx.o zbhwh ve7-b; he south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic z los8ghr ybtme96 ; -bmb ;)x3v.hgw7field is

  An electron moving along the +x axis enters a region where there is a uniform(r) yid)v57r9dzg h;p tsru p2 magnetic field in the +y dzgpidp7; sruv)r h2r5)(ydt 9 irection. 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 straighg hh72j a15otla/x 4lot current-carrying wire is

  At double the distance from a long current-carry gs gvs+ 4ataw(e-8i6ring wire, the strength of the magnetic fieldt8israa (+ev 6gswg- 4 produced by that wire decreases to

  Two long parallel wires placed side-by-side on a hoxhjrg (dm)+z u3az8 ;zrizontal table carry identical size currents in opposite directions. The wire on your r+rdz;m xguhj)(3zza 8ight 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 sid( 9m(ktx 8/fxrbny e,se-by-side on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field a e9/xrstxym(,bkn8 (ft the point exactly between the two wires

  Two long parallel wires carry equal cubq8b (9u8/ox(us qbj ol u+bw/rrents. The magnitude of the force between the wires is F. The current bswu(+ub8l bo8q/uq9 /j(ob xin 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)j n1 5i (-rxdbzp/dxj toward the eaxr 5ndj /d1 ijx(z)bp-st 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 currentd8z f+1s 1tg8o)a3sky)frodn.,w: 6u v nebic toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that i:,tn1o3v+b ro 1fc na w6esiy88 ).kdgfd)zus s moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side o4+,fgxu+;jueh6p lyp n a horizontal table. If the wires carry current i lhf, pgpuyx+4;+ eu6jn the same direction,

  Two long parallel wires are placed side-by88,kc7dpohq xem 2fx 1.m:p kb-side on a horizontal table. If the wires q,fp8bmdoxhm7p8k:12 c e.k xcarry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one 4erl 58a 7cfxhstrand 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 c lf47e8ahr5x smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both ar cqkh.4oyg e 5v1q.on8e made from one strand of wire and both carr q 45.oeno8ykgqc.v h1y 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 loop is

  The maximum torque on a current carrying loop occurs when the angle betweiw3 4z6m2-e rw.y tbyeen the loop's magnet-zymbw 3r .6 ywi2tee4ic moment and the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free toxmcx.-pimb09) pr )fi rotate in any direction will experience a torque until its magnetic moment vec i0p. rf)-bmi)9xx mcptor

  What fundamental fact unde2 i56 oucr3go jci*1iprlies the operation of essentially all electric motors 5 pgoji* ir3uio2cc16?

  A circular wire loop lies in a horizontal plane on a table and carries cq sg.ygv/60o7,hqc d 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 of. dc ,6cv yqshg07ogq/f 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 an*y5ji3j+ rl nmd charge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected inji5jr+* mnly 3 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 crosseuws+)4yr :re (5 5zjx -m d1(jai2;oqifsrmbjd electric and magnetic fields. The forces exerted by these fjx(a1dm2-my+4or :f b(qw);r5isz s ie5j urjields 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 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 orient:hoak144 xipk vjlxg*f/z*p 5l +mky)ed parallel to a uniform magnoky) +g1i*mh:ak j4* l /pkxpz5lv4f xetic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a w0p6: jle/ltauj89rp dq7j m,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 meter on a st:rm xoh o o is.tcqvx9*37jg5, i:xm7araight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an h7 qixo:ag* xvji xmsc7:m3 o,.r95toangle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 ux6:o7 rpn6 jy*mckgls; d-m4 m long has a mass of 0.050 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 weighgscm6u-4 y kxpond;jr7l:m *6t of the rod?

  A stationary proton is in3ad+:bn-u z tob aj6z. a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on thnabz.6a z 3+d:-jtob ue 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 subak 8r. ht6.d2 ,ir qr:3wle7 o6tlrupeed 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 s)xr(yf0q x.l3g, g fais)i 9c0n nr+jqpeed 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 witv/v(kd. 8d9 a77f1 le iwco.odbvuz 3eh 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 of8g t/z u(,sluh $8.0 \times 10^6 \; m/s$ 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 ,wka* 5 9r jso(ei4f/x 0zmfcjspeed 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 onlv- qd/d(81mp4 sfh pf $3.0 \times 10^6 \; m/s$ 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 the m.yh 49fmsr-2s ,ntihragnitude of the magnetic field at a distance of 0.15 m from the wisnr4r t,i- hm.f2y9h sre?

  A high power line carrying 1000 A generates what qy1*)yj iv zz nwx) fga(kvo)o4v;0t4magnetic field at the ground, 10 m awayzw(nfx;gt4aizyk 14jovo0) y * v)vq )?

  How much current must flo,qhx-0 wbis (gw 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 carryin bs/li u1ew5j-32 aoong 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 magnetic fieoblejo/n2uaw51 i- s3ld of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry curren8)u.1xbk k/rea0s shmts of 10 A in opposite directions. They are separated by 40 cm. What is the magnetickh 1)u x/basr8mes0.k 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 wires cazxh y-d+o sf*7rry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 x-d z7 fyh*s+om. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents fh ojoq4s1a2yeu5q.4of 20 A and 5.0 A in opposite directions. Tf qq4.aeuy5h1os24 johe wires are separated by 0.20 m. At what 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 direction. They 18x0 c/ mu uaosb7qs+lare parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned in the suboql+8/asmx 70 c1u 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 i+as*pn51qblp0,j z xgn the opposite direction. The wires are p,l5qajzb 0*x1+s gnpseparated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circuz5 mvux85zy 7h q0bft0lar loop of wire of radius 4.0 cm wh5hyv7qub0 zfxz 58mt0 en a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What m t9vll wg6c+ns 210wdfagnetic field is produced at thesdg+6tc9 fwvw2ll 0n1 center of the solenoid when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries 6o-rqh. y1+c2fxsm 1sb wup+b a current of 4.0 A. What s1o p+cuxmwbf.2+y- h6ss1qbrtrength of magnetic field will it have at its center?

  How much current must pass through a 4fu0h6md.qt6 ,f pc ,d764zmnctsren900 turn coil 4.0 cm long to generate a 1.0-T magnetic field a t,6,9msc f0 6hfn7dndt6 czr4p.eq mut the center?

  How many turns should a 10-cm long solaf 8/z . y5nqays-mff.enoid 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 of 120 turns that carries 6.0czam ;j y2w9qqg1/uk(zj l f-4 A if its dimensions are 4ljm(uaqg j 9- 2 /4qzwky;1fzc.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifor u -ccbeym02 mq8yrd10m magnetic field of 0.30 T. The current 0 8qeyur2-m1c0y mbdcin the loop is 2.0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectionh9 z njj) juxuixkj,r4n 9;q3-al 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 8 ,l- fr5ddw:6pf-,sjfr3xhrd yv k7h8wuel / current of 2.0 A is in a magnetic field of 3.5 T. The loop hse ,6 8xf h -:8rd kf3v7fr/dwurjylwp,h5ld-as 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 fie6fpv cro+x 5,7eje9 w l0fus)nld of 0.30 T. The current in the loop is 2.0 A. What is the magnetic tore w v )u pjsne07,r9f+56olfcxque 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 magnetic field of 0.30n.1zu j tg5lrk;pg*6fw3 7h vw T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of thjfg;1. 37ltuvh* z65kwg rn wpe loop is parallel to the magnetic field?

  A circular wire loop o ;:d7lkbcd/;wkni 1 :*byfyqg f 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 particle (chargo ltv :fd3vwm16 i5d9le 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 vell0 n,f(h 97zkenb+eoeocity $6.9 \times 10^6 \; m/s$ 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 aj d5o-t 2zo;;. azetiond then moves into a magnetic field of 0.040 T. What is the rado5z;2 doatetz.i; -ojius of the proton's resulting orbit?

  A proton is accelerated from: 8+zttbqxb qr,qm+ m3 rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular m:q+m+xqqtb b3t ,r8z to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential differeibl m;y69m(rh y1b:keoelq 3,nce of 10 kV before entering a velocity selector. If th 3r9:mihe;bl ly 1oye(mk,q6be 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?