If the north poles of two bar magnets are brought closes4vdst f s7d.hjz0:*/ qaat3x to each other, the magnet:fq a7.z 3v s/d0sd*xhtjsa4ts will

  If the south pole of one bar magnet is brought 3fgu t3, i9aygkjwy1 0near the north pole of a second bar magnet, the two ,aky 3f9 jy3t1ugig0w magnets will

  If a bar magnet is div* lv9*ylj x6tdfg9 xq8ided into two equal pieces,

  The Earth's geographic North Pole is magn+iac ;kremld.an:t( )etically a

  The south pole of a magnet 1- o70wrecjmet u:h.t 6so+ im+gk.hl points toward the Earth's

  An electric current prodwf 0orxq; r t6j6lmi47uces

  Which of the following is cokiu, p bno(: *dlii)sf8il(x 3l :,pzorrect?

  A vertical wire carries a current straight down. To the east of this wire, rcus,spqz/ezd:-8 jo q,g 8m: the magnet8 rm:u8qzjzgde,qss -:/ pc,oic field points

  A horizontal wire carries a current straight toward you. From your pointz lop wok 8- wu68m,xssej7.6i of view, the 6i 6lopez7sw-j ox.u k8w8,ms magnetic field caused by this current

  A current carrying loop of wire lies flat onqn ( m23qo1jhb a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the directiom13bj(2 ho nqqn of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flat on a table top. Wks54.m:n2 nhbb fq;cfhen 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 loop? The 4b q nskh2fm;cb:. f5nmagnetic field

  The SI unit of magnetic field)e aq*sl)1 ink7p:lo oyw /h)j is the

  1 T is equivalent tos n0vmzhn -x n)s/lx+r9 dq7d/

  The direction of the force yahaxzp3, .t3/uba k7 on a current-carrying wire in a magnetic field is described by which of the foll.a x3/yz3 auhbpkt7a, owing?

  The force on a current-cazw epstq .m6*9rrying wire in a magnetic field is the strongest when

  The force on a curre5 a/ah3.4a*uydv ifpbnt-carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where thyq)stg8v;ncu 4;y1 lq e magnetic field vector points due noq t;gu 14s;cny8vl yq)rth. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnecjkkou1 oi5u, t./d4 ptic force. From this we can concluup 1oju /,d4t kikco.5de that

  A charged particle moves with a l:g. (ix /yim:g9k;0hrsh gkuconstant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle wilik kg9gx; u(ls/.: yrh:0i hgml be maximum when the particle moves

  A charged particle moves across a constant magnetc:vsv9 9x hilil unc:ibq97;kjw 04y+ic field. The magnetic force on this particle7 jvlwucq+:;xihcy0:ki94s b 9n i v9l

  A charged particle is injected into a uniform magnetic field*y c9u+myvvkd ehc,0xgv ;e7) such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, tv cudv ;k9ee+ vh)y0*,myg7c xhe particle will

  A charged particle is obse6/q8jif)1ycg-w pf *zfpdmo. *ymi5s rved traveling in a circular path in a uniform magnetic field. If the particle had been traveling twice asfgo*ii1j5)/ m . 8yyp*ffqm-c sw6 zdp fast, the radius of the circular path would be

  A particle carrying a chapql5 e j1 do4/*p;mnvorge of +e travels in a circular path in a uniform magnetic fielvo5/l4q*djo n1 ppe;m d. 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 eastward at speed V in a uniform *7bq e+v/+xjzpzjq5gusxx,pr8- g0 omagnetic field that is dire8vgrp z+,g-xqs0 xb5q7x jjop/ue z* +cted straight downward. The magnetic force that acts on it is

  An electron has an initial veloo1xyg+e7l,rab8w ru ) city to the south but is observed to curve upward as the result of a magnetic field. The dibw+x8rl, eua7gr)o 1yrection of the magnetic field is

  An electron moving along the +x wheis3em:6l**c oeh- axis enters a region where there is a uniform magnetic field in the +y dii he 6*h*oslwe3e cm:-rection. 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 strafv8cam pfwfik,0 ,+ib9 r1j c*ight current-carrying wire is

  At double the distance from a long current-cagwq),bi wbst( 7f :ahrzc3v/5rk . gnzdt) w84rrying wire, the strength of the magnetic field produced by that wire decreasekvhwdgz)3sc zb7f biagtwr,4/85.(wqt: n) r s to

  Two long parallel wires placed side-by-side on a horizontal table cav m6oudi/y,hn5s)4h;n3 fsx crry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire on your left carries current away from you. From your point of view, dy/i n 3h5n64xc;,ushf v) smothe magnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizonta,*m3 (e3yuxgln -ne sgl table carry identical current straighegm(3 s-nl*,uxg n3yet toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the fos-h y(3epg k4 cz(9xyzo/n .hirce between the wires is F. The current in each wire is now doublph c.yxeny zoz g(h39sk/i-(4 ed. What is the magnitude of the new force between the two wires?

  A long straight wire carries current toward the east. v c r ze4v93jcyc2b;f7 A proton moves toward the ee4f vjcc392 z;bvyrc7ast 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 currvoc-xaoz.e3ixc/a0 wit,* / mw wf/x3ent toward the bottom of the page. What is the direction of the magnetic force it produces on anfca-w/ 3ozo/ve.3*im,0axwxicw x t/ electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placeo080g*dlecl1w wv dk4d side-by-side on a horizontal table. If the wires carry current in the same direction lkow c8w1*0g4elv0 dd,

  Two long parallel wires are placed side-by-side on a horizon;y9rw5 p (rf d7c5oiqutal table. If the wires carry curf udqr9y ;rpc(w57 oi5rent in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strandgvw+4: pqd gf4 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 w4fv4pgg d: +qsmaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made frosnn.9ag.v 5zdmy)h p2m one strand of wire and both carry the same current, but one has twice the radius 9.5az dnh.g 2nmv)sypof the other. Compared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a cuugl6,fk 9j1bqrrent carrying loop occurs when the angle between the loop's magnetic9 k,j bg1fluq6 moment and the magnetic field vector is

  When placed askew in a egb;b07j7d:z7nmmhas7w r5 k magnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until g; re0sz7jhadw: 7kb5mm7bn 7its magnetic moment vector

  What fundamental fact underlies the opera9ww,jy;,qb0 lezqj l-tion of essentially all electric motors?0w l, ;bjjlqqz ,9e-wy

  A circular wire loop lies in a horizontal plane on a table and carries curre+(kc; :f usb-(hybyoynt 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 currenusf +b;kby -h:c(yoy (ts interaction with the magnetic field?

  In a mass spectrometiwa)py)h ii;s):yt pl83-h nber a particle of mass m and charge q is accelerated through a potentialb y i3inthp-y :)lasih)w8; p) 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 crossed elenusux+9h1 a.dj3:3x jq2 w1osyjrh:f ctric 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. 1x.ounhasjurj :h3 xyjq 3d2w +f:1s9 What direction should the electric field point?

  A 2.0-m wire carrying a current + 7ksb6 2dlxyjof 0.60 A is oriented parallel to a uniform magnetic fielbyjs2 l 7dk+6xd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a di0*vb; deaz rq/rection 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 a krp(5karp1v 2ta*wn8e0+3 sfi-o twis placed in a -pw *aaok10 trviakft w8ns523p(+ ermagnetic field 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 hym0v ujuct; 2 x4ww+7xas 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 cance7xjt uc0ux+4mw 2y;vw l the weight of the rod?

  A stationary proton is in a uniform 2zy /*xbti/ri:q zfz fwkmxz08o5)n*magnetic field of 0.20 T. What is the magnitude of the magneti/*0bfx w: rzoz*x2y k)iqt5z8i/zn m fc 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 wi gutjwn 9q*c)qa ;k7v8 0qdn,kth 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 a speed oj9it1lx8urge2dz- )jo8v g*cf $5.0 \times 10^7 \; m/s$ 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 with speedhjyn ,i1xe9b* dc2 *xs $4.0 \times 10^5 \; m/s$ 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 spee9794zvzmy a:,ayvgi *g /cx gpd 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 sb 51a/p fu:c: dum)5bl *qpd*il(pdjkpeed 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 t ueo- ckn1(m.$3.0 \times 10^6 \; m/s$ 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 ojoesy2p6f:i : xt ykox)6 o)k(f 25 A. What is the magnitude of the magneticeysokftio p)( o6:k2j :)xyx6 field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A:pkp1 ;mfl8/qywa*bt generates what magnetic field at the ground, 10 m awa:k f /p8;yp1ltwmq* bay?

  How much current must flow for ruxgn k6r gm, h7 )g;e/nl*p-s$1.0 \times 10^{-3} \; T$ 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 byj 5bkz-mts001v8 tsthe magnitude of tttzys0b-0b18k5 s vmjhe magnetic field due to the wire equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directions. vbjwm z.g(iuz;1y, t3 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 the oth.wb; ,1im jv(yzt 3gzuer?

  Two long parallel wires carry currents o)9c8s,d+df fy/ezmsb sq 1c1m:kxa0 df 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between th s df1k9mcsf0dm+)azdcby /, 18:qxsee two wires?

  Two long parallel wires carry currents of 20 A and 5.0m:ar988bm cc)hdh9 l zsnr e9* A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wireccr )hsl9zn9a8m:mr h ed89*bs the same?

  Four long parallel wires each carry 2.0 A in the same direction2axat-c*-5 nvfj/:esibvmn( . They are parallel to the z-axis, and they pass through the coa2 i-cnsm(fjavnevb5x : / -*trners 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 the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the opposite direcl jrw+ fnl445jtion. The wires are separated by 0.30 m. Find the magnetic force 4 +nfjrj5l wl4per unit length between the two wires.

  What is the magnetic fiel9ri q9;vp x2myd at the center of a circular loop of wire of radius 4.2m ix99qy;prv 0 cm when a current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 y j+wabbo.f( szih96 ;turns of wire. What magnetic field is produced at the center of the solenoi.s i z9;(hybw 6a+fbjod when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 g+du 5 g((sqsd gmbb66m long and carries a current of 4.0 A. What strengtb g6((su56 dmsbqg dg+h of magnetic field will it have at its center?

  How much current must pass throughby*;gn g( yw/:wdfwo: a 400 turn coil 4.0 cm long to generate a 1.0-T magnetiw*n(/ gw::ywgdfoyb; c field at the center?

  How many turns should a 10-cm l8vo ky;zyw y9td- 0ve0ong 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 of 120 turns thatgj+y*kyyuu;xd9k i 6n)/ *gh v carries 6.0 A if its*g9yx6/nj ;y+v k )yhiugukd* dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of.wq7q :bp mog) 6*uqv01j aiwx 0.30 T. The current in the loop is mvqgwj*p6xu7.wb0o)a 1:qqi2.0 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-sectional aripto /7knw6w7ea $0.12 \; m^{2}$ 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 fi :-g3s6uio+s2jrm -dmxb xt goy9k+3reld of 3.5 T. The loop has an area ofrgb39yxir+o uo2+ dm3k--t6ssmjg: x $0.12 \; m^{2}$ 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 magnetfwsm9t7y ; x;tic 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 magnetitf;ys9m x ;7twc field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.30 /c kxk.a0n0eq 7lig5 hT. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loo5ka lh0q7xn 0gc/ki .ep is parallel to the magnetic field?

  A circular wire loopja6njoq g1ij07eg l62 of 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 sin1-8xbrn y;voagle-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 ion wia(pg:hpvh( y4. bksm +th 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 moves into a magnetic fi.mw)s2e pjb 1keld ofbwms k1j 2)e.p 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. Itgtt y:)p(4+7lc 21w fc*t nfbax:aibh enters a magnetic field of 0.30 T oriented perpendicular to its direc(pxf::tlc 7 y)4batiah*+nc 21g bftwtion of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10talk;d)7 m,f 4yf8tdb .xu *ft 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 required if t y fxfa;lt7 mtd8d. ,f)ut*k4bhe particles are to be undeflected?