If the north poles of two bar magnets are brought close to each other, the mau3:uda dq )50 qv/vvw qiohtsk(6k,m7 gnetssv,dkqdv m 0 twu:375kqvuh/ (qa)i6 o will

  If the south pole of one bar magnet is brought near the noo 6:j9hsn. )ls6sthwn rth pole of a second bar magnet, the two mat)s6jo sn.hl h :ns6w9gnets will

  If a bar magnet is divided into two equal pie.ek76aghdsq 2 qng7e/ ces,

  The Earth's geographic North Pole is magnetically ar6p* *r.1);gfsaoq 2ne rvd r hampx41

  The south pole of a magnet points towvz1wt6rloef: 2h k yv686h-roard the Earth's

  An electric current prod mcnogr (g+:o0uces

  Which of the following is correct?3+0pwq njcn2, jqpyuhhov7 , 0

  A vertical wire carries a current straight down. To thr*5lumrm,;; byvb7(r 1 czkp ae east of this wire, the magnetic field poiyrrrb lvmu; (*za5 ;1k,mcp7bnts

  A horizontal wire carries a current straightil z 0po1ez cyw4*23wp toward you. From your point of view, the magnetic field caused by this cu0 4oizzc1 we2*wlypp 3rrent

  A current carrying loop of wire liessd46t(5lx my qjus78g flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the t(ys4g8lmus57q xj6d direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat po,it,sw)+ vka7/gep on a table top. When viewed from above, the curren7ao,g i),vsp+ etkp/wt moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field is.)sip4z8pj oi-w:zka the

  1 T is equivalent to:wvse v-ir7pi gocbdc9rw +r5/5;2vj

  The direction of the f+oqxhqckx+1szv3 0j)q /t+ ge orce on a current-carrying wire in a magnetic field is described by vtsj)3+x1gkxq+ z qo/eqhc0+which of the following?

  The force on a current-carrying wire in a magnetic field is the w34itnnnx,q735 aiyi / (mppp strongest when

  The force on a current-carrying ;ilhtzte4yos f, cxd:4s1un i6-5/mlxzo6) ewire in a magnetic field is equal to zero when

  A vertical wire carries a current bclau *n:-7yastraight up in a region where the magnetic field vector points due north. What is the direction of the resulting force on this currenc -u*lba7a:nyt?

  A charged particle moves and experiences no magnetic force. From this we can coj( b;*)lts84nq4h;i q dehjhcncludnet4 )h8;i *q 4dsbjcjqh(lh;e that

  A charged particle moves with a constl9u xd. ut+;yg myal;5ant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetiu5;gdym+t.lxula y;9 c force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The mag + jh6osc2gklm1 ,oq7qnetic force on this partmjc, skglh6o2o1 qq7+icle

  A charged particle is injected into a uniform magnetic field such that it4y-u w:n (a j 1lno1gb8lezvc0s velocity vector is perpendicular to the magnetic field vector. Ignor8 :( y0 wb-ujnoal4cev 1n1lzging the particle's weight, the particle will

  A charged particle iss5tn-d g 8ixx5g cnf98 observed traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice as fastgn 58i n9t5xxf d-gsc8, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular pa 2 grlsk u5q3f+7wxrm3th in a uniform magnetic gqrkx+2um3fl35w7srfield. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves east dm. w(4nkgkaz5i a6tc ,vfqn,/4o-ol ward at speed V in a uniform magnetic field that is df k4nkowtgo4 qn.5 ac /(ivl,6zm,da- irected straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the skf e5w6yq. kx)outh but is observed to curve upward as the result of a ef.qwk) 6kyx5 magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters a r l0,e+zq kdke.fg7tz;egion where there is a uniform mag. eqkdgzl k 7,;fet0z+netic 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 page.)

  The magnetic field produced by a long straig2js vgk 7pyt;7yj iq0qo2(l 3or0rz f/ht current-carrying wire is

  At double the distance from6mv 2el ;(lophp fzyk9j+u ) 1fwrw6gng*,9zx a long current-carrying wire, the strength of the magneticn1m6 lf f( lzh,*g) ; gzpoux9wj26k9+pevwyr field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table carry identicihy yo,nzfm; .o:p3m*al size currents in opposite directions. The wire on your right carries c:y,fyzm;3 *.nomhpoi urrent 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 side-by-sipf+()/ di(qg i gfr.0ngk9lsmw8e oz2de on a horizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point9zre8ggn0( + m w.k f)lis/2dgqifo(p exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force bxvq c)7iy r;z+kd y3s8etween the wires is F. The current in each wire is 8ck3d)+qy sz;ryx7 i vnow doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward pt1c85hp9 9xxa,cjz,y n cq,r the east. A proton moves toward the eaj5 ppcczq8a,hxc9r,9t n 1 x,yst 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 current toward +hi6o-,edgdy 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 rig+,y ie-6hd doght?

  Two long parallel wires are pla-lh2m nujd78auyxj84 ta1mc; ced side-by-side on a horizontal table. If the wires carry current in the same;n-lj7am aj41mx hdt88c uuy 2 direction,

  Two long parallel wires are placed side-by-side on a mw+rrl. + 1*ngv 4c yeb;ufth6horizontal table. If the wires carry current in opposite dire y;e*fwbr n 1mvh4g6lutc++.rctions,

  Consider two current-carrying circular loops. Both arefvyph;c5:wj 9 made from one strand of wire and both carry the same current, but one h;h:5jp cfwv y9as 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 circularba1-j-1t) t j h39n1fvwdgild loops. Both are made from one strand of wire and both carry the same current, but one has twice thjt9l)1gwb-ji1 dv1ah -fnt d3e 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 occuh4.( yk.ogxjk rs when the angle between the loop's m .kyjo.4x(ghk agnetic moment and the magnetic field vector is

  When placed askew in a mau44g 3e7 ouadp1q;1mz q scw9agnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic moment ve1acg4uqsq4 p; ou1d m3 a7w9ezctor

  What fundamental fact underlies the ope/r/.wbrgug ; ;wxgv3n ration of essentially all electric motorsxgb w/ rg/ v.wr3ngu;;?

  A circular wire loop lies in a horizontal plane on a taxkrk7p h s +zwp;k+p.lqc +9t8t+9tm pble 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 because of the torque caused by the cuwm pkr9hx7 c+ .k8s9q+p k+pt;l+ zttprrents interaction with the magnetic field?

  In a mass spectrometer a particle:j,h n nint- ;hro7.bd of mass m and charge q is 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 t ,:hn hn7-;d nb.ijrouniform 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 par iu3vy5kh6 eb9ticle 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 a velocity selector, the particles move toward the east, and the magnetic field is directed to the north. What direction should the electric fi95 kehyiuv3b 6eld point?

  A 2.0-m wire carrying a current of 0.60 A is orshjn)y-0g 0-0y 3e(dsu v6owcrmqa1 iiented parallel to a uniform magne6) r iges1(q 3 m-0c-h0asu0y jwoydnvtic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1 )r /.tri9b xqbfakit,8k1yv40 A in a 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 me ;rmycx 6c..cster on a straight wire carrying 5.0 A when it is placed in a magnetic field;6 ysr xc.cm.c 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 m6:83aez80rhhu; kz d/j+mcemk ; wzwo 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 cancelhez3m:w u; ah0wcr zokk dj8z; 86+e/m the weight of the rod?

  A stationary proton is in a 7q:bmpr5v h;muniform magnetic field of 0.20 T. What is the magnitude;rb7vmpmq h:5 of the 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 a speed xhg+ys0s)ct75(mdw jof $5.0 \times 10^4 \; m/s$ 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 tuc5(evnedy9k, 3t*v wm5-z az kq77qa 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 due north f):gcsi 9epq:/qd4 -qnrcn+uwith 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 slv4i l lx,w//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 spee/ xk g1ed;1vdpd 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 of gju-o8ghnkr) t;-nzpe.c2 8 b $3.0 \times 10^6 \; m/s$ 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 magnitude js(ra4 11h3vdvh4w b vi3cq8a of the magnetiw4 vidvah h4 b3s(ja1 c3v1q8rc field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generatb z0 8.led3qato tmj-+es what magnetic field at the ground, 10e.0+3a8qzo ljtmtb-d m away?

  How much current mus tv(fbznbc2 uf7ui(*oj*+-h qt 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 wirx5j7a t7axq7 se 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' 7x saqt75x7ajs magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. Theti f so)yeq5)*y are separate)5tisy)* fq oed 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 the other?

  Two long parallel wires carry currentsybccrvy; k,78zcshd13n :o *xmbyk 62 of 20 A and 5.0 A in opposite directions. The wires are separated by 0.2m31x2 * y6,7y:yhc k;kzs nb8 cbdocrv0 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 dim*w3g5xqzuf1 rections. The wires are separated by 0.20 m. At what point between the two wires are the cq*5wug1 mz xf3ontributions from the two wires the same?

  Four long parallel widhw5eg m 3j i9cp/:(ftres each carry 2.0 A in 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 9 them p3ij/gdcf (w5:magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents oe l,cdnc 2yjt;1lk on5 ;1nbf;f 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the ljy b fe1;nn5o1; ;2n,c tlckdtwo wires.

  What is the magnetic field at the c7hmszh k4 1uv5enter of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in th5m1sh47hk u vze wire?

  A solenoid 20 cm long dqr9o jx88rl-q4j.f d+eru p.is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoidlj -8drd .rxuro jfq4 e.p9+8q 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. Whft**u4nhqgti3 7s2)ic*a pjzhwkb :;at strength of magnetic field will it have at its ce2 n;*z thtiw g bki*s fc4qap)hu:*7j3nter?

  How much current must pass through a 400 trf; (t oth0tq(urn coil 4.0 cm long to generate a 1.0-T magnetic field (qto 0;httfr(at the center?

  How many turns should a 10-cm long solenoid hadi+.a r1 jtp/ave 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 re*oz.zzdn9,,n ca:s: s 7n mtmhctangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0zh,tm *dc,:.zs:anzs 9 mn 7no cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnh3b .d9 igl*y3*cx8y b l9jtbuetic field of 0.30 T. The current in the loop is 2.i yx bcj* l 9b.38utdh9bly3g*0 A. What is the magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire/ 0sdnkwfac ,1 of 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 T qq +z-9fcj4itj0j :qy. The q-q0t4c+j ifj:9 yjq zloop 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 magnet ducr;8 ftx v7uqqe)7* xe(lr8ic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torquef87(u)qeexd7*vxcq urt 8rl; when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of rwum a /:*ac,mwadius 0.50 m is in a uniform magnetic field of 0.30 T. The current in the lomwaa w*cu/, m:op is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop db1pr u);fte : pc*;tjof 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 (charge e) has a s 3janl-) jh/evpeed 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 v0+w/d -w1l9 gg6diwqqwqw j 8helocity $6.9 \times 10^6 \; m/s$ 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 thev sf tc)(k;kk/n moves into a magnetic field of 0.040 T. What is the radk(f kk/vcst );ius of the proton's resulting orbit?

  A proton is accelerated from rest through e :jtg0gnd oy4rr(mt5.hb-d 1500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motionn .gmj:r brdg-1 e h0yt5t(d4o. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference ofl3luex+o78 ed k6 xyw3 10 kV before entering a velocity selector. If the B-field of the veloc7wkye3ed o8+3lxlxu 6ity selector has a value of 0.010 T, what value of the E-field is required if the particles are to be undeflected?