If the north poles of two bar magnets are brought close to eacs g7) atlca31egx*l.hh other, the magnetxg1ch . g3a)l7ste* las will

  If the south pole of one bar magnet is brought near the nort54 uslfd j(ehx3p-m*ph pole of a second baru p(4dljhmf sex- 3p5* magnet, the two magnets will

  If a bar magnet is divided into twaz7j8t w,gno3e a(zs4ifw n,, o equal pieces,

  The Earth's geographic North Pole is z--)f v yurb*hmagnetically a

  The south pole of a magnet points toward the Eartyw2j/ u2( zjk 0vpgj9oh's

  An electric current producesh8;; 54sd (ctm7w ow zces,qso

  Which of the following is cor)y4q wc43c paorect?

  A vertical wire carries a current straight down7a0;kd/ rxzgj. To the east of this wire, the magnezr; /k0agdjx7tic field points

  A horizontal wire carries a currbgqezo1hu yf -k--,i u)s;)jq ent straight toward you. From your point of view, the magnetic field caused by thif o1 -qi-jq-y ) kg)zb;euus,hs current

  A current carrying loop of wire lies flat on a table top. Whe8xrb bf n5vp-5iy+; ecwflth)ar28.y n viewed from above, the current moves around the loop in a counterclockwise sense. Wh2+ 8 e;hrf 5).t5cibb-fwrvaynlyx8pat is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loo 70;w 9dl,4bi lnewatvp of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclodb ;ni 9w40l wl7t,aveckwise 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 chz1 j q acn96):znu3bis the

  1 T is equivalent tocx8(c) n5uvl vjog;(z

  The direction of the force on a current-carrying wire in a magnetic fieldy6qcrr vrkm +dr)7 p0(yl14zn is described pdy1lc7k6rz rr y0m+r4vq (n) by which of the following?

  The force on a current-carrying wire in a magnetic field is the yt3q. cujzw/y(lm qdd(c q89- strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero wh7mv1g13cirh (e za5vzen

  A vertical wire carries a current straight up in a region where xrw-+k p3l+ cfi2s-/r7 sntb jthe magnetic field vector points due north. What is the direction of the resulting force on this current -p+kjt +sbcrwlnf s7-23rix/?

  A charged particle moves a3f,5o hl3hszx nd experiences no magnetic force. From this we can concluh,53xol 3sfzhde that

  A charged particle moves with a constant speed through a region where a unifo .4btem;5wyvk rm magnetic field is present. If the mvwym.;t4 ekb5agnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across j3x.3terl,t n(l y wkqkyh)(a+o nx,,a constant magnetic field. The magnetic force on thi renk),yh.(, nx,q wa33ytkljt(x+ o ls particle

  A charged particle is injected into a uniform magneg 5nzv51 hzu rr41xk5paa3m1c 2 *sgdxtic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the pazp gv4u*kdr am1nc15gr2 315szh a xx5rticle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform magnr7tpqp a ktc+f2;4.to etic field. If the particle had b;afopp ck.74+tq trt2 een traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge o nyzx4 q .*yyqj50bk;kf +e travels in a circular path in a uniform magnetic field. If instead tbq yx5.n4kz0kjq;yy *he particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instan)i*y6f f0/f+ v; vxuzms(noqdt, an electron moves eastward at speed V in a uniform magnetic field that is directed straight downwar 0vzf*i+y 6; fqm)uvx(fo sn/dd. The magnetic force that acts on it is

  An electron has an initio(m;uv)q5bo3 lq.vo3 3rn dxr al velocity to the south but is observed to curve upward as the result of a magnetionqbdooqlvmx)v(u;rr3.53 3 c field. The direction of the magnetic field is

  An electron moving along the +x axis enters a region wherrelvnt+ c86s 4e 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 ouvtes6nl 8r4c+ t of the page.)

  The magnetic field produced by a long straight current-carrying wi 8tlkm1*d;wnhdu9n6mre is

  At double the distance from a long +9ib0lq elc,uwo*+qdu v za9/ current-carrying wire, the strength of the magnetic field produced b99q u/+qwzv llceu*b0doi+a , y that wire decreases to

  Two long parallel wires placed side-by-side on a horizontal table ca1:g,zt8ao :j8mw lltl rry 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, the magnetic field at the l o:8t8lwgt:mzal ,1j point exactly midway between the two wires

  Two long parallel wires placed side-by-si )xqt heppef6u;dp xl6xm; ur6439g2e de on a horizontal table carry identical current straight toward you. From your pointp3m6r)4lqe; ;g6x6ufuhp ed9x2tpe x of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. jnamy: f8)*vi5kq tb*u1q-qe7 nl3 vz The magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wiv n 17-b*f y 5ujnz8ktva*miq3elq)q:res?

  A long straight wire carries currer,f3eg(yv a+ent toward the east. A proton moves toward the east alongside and just south of the wire.r3e (,feay vg+ What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a ceakx7+3qa0,nwtx 6 v.ias sc1urrent 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 wix at1k x6si e+cw.3,na0va7qsre, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal tab 9oec y-e:bb y9 9kpm2ooz;u.ele. If the wirmeyeub.9op z9oc9; b k2 ey:o-es carry current in the same direction,

  Two long parallel wires are p4 7kbp/ fpg//v rgq +b.d0*:qhelq- nbg k6vtzlaced side-by-side on a horizontal table. If the wires carry current in opposite directz:/qdv67lb*b/ gg0. t -/q pkeb gn4frhk+q vpions,

  Consider two current-carrying circulacs79/a8hzug+xd1vp s r loops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of theh8xc u+v1pd /sa7z9gs 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-car/ :juom.u jr;d+rm jq*rying circular loops. Both are made from one strand of wire and both carry the same current, but one has twice the ra+;ju.m jm oqur:*/j rddius 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 bet c g*dqh* hopqn3;/q:yween the loop's magnetic moment and the magnetic field vector icg*q 3oyq*h:dhqn / p;s

  When placed askew in a magneti /lfdj9,31i2 tj6fo c-q gyybmc field, a current carrying loop that is free to rotate in any direc-fqytgjj/do 2i 9 lmfb6,1y3ction will experience a torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all elma f9uhmgb:54azw)f 1ectric motors?g9awh:b ufm)45 fa m1z

  A circular wire loop lies in a horizontal plane on a tfj(ti 5r r+r:jable 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 currents interaction with5+frj (tr: rij the magnetic field?

  In a mass spectrometer a particle of mass m a 0*k wapclu-.hnd 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 uniform and oriented per.0a- kw*pchlu pendicular 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 parti7y iz8t6nq 6d8;q omprcle passing through crossed electric and magneticni6q8;6d pmo tr7z 8qy 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 field point?

  A 2.0-m wire carrying a current of 0.60e;t/ tx7khl s6 A is oriented parallel to a uniform magne76klt/x esth;tic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current ofwk b6 xlx*.5or 10 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 meter on a stra(y7:; du2eg hvfikfd- ight wire carrying 5.0 A when it is placed in a magnetic field of 0.02y72 hev gfu(id d:-;fk0 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 0.050 kg and is in a magnetic fieu7uz+d- t5t3sve b)opbwa 3xo1n.2cald of 0.10 T. What minimum current in the rod is needed in order for the magnetic fo) t1x35bpna3.2 a-euwco t7ouvz+sd brce to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What /0d kh8:bcssc is the magnitude of the magnetic force on the prcbk0 /s hcd8s:oton?

  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 of n-eebskey.3;gut 34x$5.0 \times 10^4 \; m/s$ 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 of 1yjam ew(j.;bqn xne1de,+*y $5.0 \times 10^7 \; m/s$ 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 szb25:iw z*cn kpeed $4.0 \times 10^5 \; m/s$ 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 ;nf,7ykv3eyvh (r6m jl80oga a 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 spku,yvo g:9r3nl7d /4wg-p drzy xt35w eed 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 o;mlcd;.0 qk u 3xzr:7daocja2f $3.0 \times 10^6 \; m/s$ 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. Whsx jc7 j:eq7d nn92d2iat is the magnitude of the magnetic field at an79edcxq jj27:s2 ind distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground, meb)p2 2bc5jp10 m away2ecj2m)5p bbp ?

  How much current musilk qs(gy t5*;t 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 wire carr,m-cl42s)d p pbz6ls bying a current of 5.0 A is the magnitude of the magnetic field due to th dpbp6zcs 2,l-lsbm 4)e 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 inyn. 7ix6t83 ex) i8t7pyuscez opposite directions. They are separated by 40 cm. What in8e i7up 6t.ycstxe 7xyz)83is 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 wire8zs*e/of:. e disy+wr s carry currents of 20 A and 5.0 A in opposite directions. The wires arswo fe8/.i* se zy:d+re separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry cur8qtvu*o cwm; 5rents of 20 A and 5.0 A in opposite directions. The wires are separated by 08qtm5w vc uo;*.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 samebmrn lw 6x0x p(:d/h2d 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 to the ot(x0 :hrp6dx/2lm wdbnher wires?

  Two long parallel wires carry currents op2ydub* jij 52ef53 ;n/hkm4t9r oql if 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 betwee l5th prdi9;j u2j3/mqo524*yif bnek n the two wires.

  What is the magnetic field at the center of a circular loop of wire lev5.+midi;ezd e99u/ hc b;xof radius 4.0 cm when a currenii ;x/5l+vb. ;d umcdhzee9e9 t of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 tur;lzhzjakpnb 9w2e*6t c u* d8*ns of wire. What magnetic field is produced at the center of the solenoid when a curre9j2e6z*lna*k ;tdcbpz uhw8* nt of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a curr65)eqisyay q(+w 1te8rln 5zbent of 4.0 A. What strength of maq )5ly5qin etwra+zy6s1(be8 gnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm q9a jsd:sitva+ 1r,n9long to generate a 1.0-T magnetic fiq i9tr+ 9ns:da,vsa j1eld at the center?

  How many turns should a 10-cm long solenoid have if ittsooau;vie99)z.cp( 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 carmdt abe))r6o9o35 khbv u w7.eries 6.0 A if its dimensions aru 9)te3doo6 .beb7hkv)warm5e 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a unifo lpn3osdex1 07xyt m :55mi.rfrm 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 perpendic3 :p mxiynrdt70sl15o. efx m5ular to the magnetic field?

  A circular loop of wire of cross-sectional are4xe(d9880v;sckx7q3hplqm yd v ywh2 a $0.12 \; m^{2}$ 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 carryijd w8.kjlfo7iees 9wu47-u o04y y1fxng a current of 2.0 A is in a magnetic field of 3.5 T. The loo o7w4jyd7kfe.1840ei- wlo sxu9uj fyp 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 nsy 0 n- q50(-gp0uftegvmj) za uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is zupy0-50j(f 0n eqnmv -)gsgtthe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.5x1 w mfpnh-x0d;f/d,l0 m 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 n0;md -x/ dlffp1h, xwloop is parallel to the magnetic field?

  A circular wire loop of area zmat9 l88va;spxu0t 1 papn1+ $0.25 \; m^{2}$ 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 spectrometojiav7qq i-v*h up .7)er, 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 ion with veloci t7vj5 3ugwn8qty $6.9 \times 10^6 \; m/s$ 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 fan1r(auu* 9qnc 8 u*vt4h 0lninto a magnetic field of 0.tuua unhnq18*4l( rf vnc9a* 0040 T. What is the radius of the proton's resulting orbit?

  A proton is accelera *w)(usu*c l :ibvg i+wquba:/xh4.vuted from rest through 500 V. It enters a magnetic field of 0.30 + /hi *bgua:u( wv*w:uuqxis.lc b)v4T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated througy,;i4)v8k/vf x,z eb lybc d1gh a potential difference of 10 kV before enteri iczde,l14x,k;byfvbyv g/8) ng 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 the particles are to be undeflected?