If the north poles of two bar magnets are brought close to each other, w6otz u1p4-ezmt : n uaeit)(ys*iq2,the magnets wtw :peaqion*s t 42-6 u)im(uztzye1 ,ill

  If the south pole of one bar magnet is brought near themtric+nof 62 , north pole of a second bar magnet, th+2t co6mnifr, e two magnets will

  If a bar magnet is d)9qlv s)j8pgh ivided into two equal pieces,

  The Earth's geographic North Pole is magnetfd;p: *+.grmji;cjfzically a

  The south pole of a magnet.b7 *7ifo - z 392li okk9hk7rohgohfx0g pkk2 points toward the Earth's

  An electric current ptyk4fi8q e1i6 roduces

  Which of the following zls8 dyhi4g45uu90hrb.tcm, f7mt/c is correct?

  A vertical wire carries a curu08,d qn byrrg*pj2c; rent straight down. To the east of this wire, the magneti*jqr8gndb0 2y rup;c,c field points

  A horizontal wire carries a curr3y 69aj zsjj(g((j2qbomfx hu3 e7i p,ent straight toward you. From your point of view, the magnetic field caused by this y3(xqu9hbojfe7( jimsa 2gp3zj6(, j current

  A current carrying loop of wire lies f -6iydk/ xaz9hlat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What i ay xhzk/6i-9ds the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circula4to--ovtev .yx:9 fafr loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. fax vf. t:9--4ooy etvWhat is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field1 fsb*y8* b a3+wdetlx is the

  1 T is equivalent tozb ca :b)**s uzhxlr9x9p()dc

  The direction of the force on a current-carrying wire in a magnetic /6ld*o jott91 zo0(rka4dzapfield is described by which o(/ozd0dar96o k j4*z1totlpaf the following?

  The force on a current-carrying wire 87cavuff3d.p 2p :kyzin a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to zero4t, +* hi om*z9ukd a5/jiot(on,hxri when

  A vertical wire carries a current straight up in a r;0 4swonx cz gv3hfk2:egion where the magnetic field vector psw4k;0 on3fz2 hc:vx goints due north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences xi;7sv( ep ge8no magnetic force. From this we can concluxsv7 giee p(8;de that

  A charged particle moves with a constant speed through a qg+6bg 58g,qu;,f9q jkw q kuo;8be twregion where a uniform magnetic field is present. If the mag ;6 jeb b oq;qgkquf8,uwtqgg, 985+kwnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moj hdw* n6l6s,jves across a constant magnetic field. The magnetic force on tlh,sw6jdn6 * jhis particle

  A charged particle is injected into a uniform magnetic field such that its v*i)y)a4 mrilv elocity vector is peraryv i l4*)i)mpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a w 448xflno 5ku7p0y fzcircular path in a uniform magnetic field. If the p04x nwu8 fkf7po4ylz5article had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in a us(jf7k(gxy6. 5 n0)qwd3e m wugkaf4uniform magnetic field. If instead y (j6(5)afkkn xwqmd7eusgfu w034 .gthe particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, (4h41rrrtjuh ;cuqp es0r, 2g an electron moves eastward at speed V in a uniform magnetic field thatr 4(qg u1th2pcruerh srj ;,04 is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south hgqb8 d302qu mbut is observed to curve upward as thuhb0 3 gdqmq28e result of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enaf;6w/k hw7 w. 5*d za4gicpuiters 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 +z out of the pagew5 kwag47.z/ if ;phua*cwdi6 .)

  The magnetic field produced by a long stl46 ;tcdm- iltpzz 1*/ zegc5uraight current-carrying wire is

  At double the distance from a long current-cajy 3/8kdy:cbqp r nd9*(9zwhy rrying wire, the strength of the magnetic field produced by that wire decr ckqzhw93p9y ybdd:y*n j(/8reases to

  Two long parallel wires placed side-by-side on a horizontal tab7gu/;h p.q c t)jedf2qle carry 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 fihqdt u2 gq. )f;c/p7ejeld at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a hygac2 0b1zz g3orizontal table carry identical current straight toward you. From your point of view, the magnetic field at the point exactly between the twoagz1zbg3y2c 0 wires

  Two long parallel wires cs 3f pf8n,vi4narry equal currents. The magnitude of the force between the wires is F. The current in each wire 3f8n ,pivsfn4is 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 f(.na6sxxa:ztoward the east aa6zx.:as f nx(longside 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 carrie n-v7i t,/yrs(lbc en7s a current toward the bottom of the page. Whltic- n,be7y / r7nvs(at 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 right?

  Two long parallel wires are placed side-by g:e-) xt-ybil-side on a horizontal table. If the wires carry current in thl:-y gtieb)-xe same direction,

  Two long parallel wires are placed side-nilgd4 wt6 zc4qdqt /.oje.;/by-side on a horizontal table. If the wires carry lcn/w edozj6i 4.gtt.;dq 4q/current in opposite directions,

  Consider two current-carrying circsjoacnzzmyd44cu,ws5;5 e y) a .f*z9ular loops. Both are made from one strand of wire and both carry the same currenwmao;4c5 zs)9 5y *.dzn4yacusjz,eft, but one has 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 one strawsc em 6 o9 s30nc44w+fqzp+eund of wire and both carry the same current, but one has twice the radius of the other. Compznw 3pm+s qsw40ee+c4 uo6 fc9ared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a cur pdv(gusv0c1n 8y 3x6srent carrying loop occurs when the angle between the lo0yg6x cund3 8ps(1svv op's magnetic moment and the magnetic field vector is

  When placed askew in a magneti-4b/-fec zk:hnlkz a)c field, a current carrying loop that is free to rotate in any direction will experience a tf nlzc k4 z:kb/e)-h-aorque until its magnetic moment vector

  What fundamental fact underlies the operatio0h h,hvx w5f*pn of essentially all electric motorsph5xvwfh,*h 0 ?

  A circular wire loop lies in a horizontal plane on a tabbqtbz5.i c (qrrx s3(+le and carries current in a counterclockwise d53.b bt(s r+zicrqqx(irection 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 with the magnetic field?

  In a mass spectrometer a particle of mass m ax 5 aa,e* k1l0:v3zfnw;nvhfsnd charge q is accelerated through a potential difference V and allowed to enter a;5n xkl,en 3 zf0: h1afasw*vv 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 cm4mj5l q5766 cljljl nrossed electric and magnetic fields. The forces exerted by these fields are in olcmjq 5ljl6mj5 7n4l6pposite 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 carryino lb q;6r:v2hpg a current of 0.60 A is oriented parallel to a uniform magnetic fiel2: 6hv;qlb prod of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in am:/bnf g/ ylovy q0bvg8:p8 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 straight wire carrying 5.- 0xk epposatez98(x lto27q00 A when it is placed in a magnetic field of 0.020 T? The wire metq( ops0atpzoxkx 7l e29 -80akes 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 fieza/0 s7fx2tlf ld of 0.10 T. What minimu0 x2f/lsf7 ztam current in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a unifov1u0ua:a+zc adma,8l rb(pya: 4g a 7vrm magnetic field of 0.20 T. What is the magnitude of the maavd rl0p,u:7az+cgabau14 v:y (a8 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 withq*.x3p3hovh1ds, gk9f;g d baap du7/ 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 +j(lutskeu+ 9ui+5z qa 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 with speedr8(b4 t/ygq ke+sdmsq2h bo4:t s2q u) $4.0 \times 10^5 \; m/s$ 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 8-b5:hzkyua f 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 sty:u rrw( s0e5peed 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 ol1 *gwvf )cd3k. xw*wcf $3.0 \times 10^6 \; m/s$ 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 h ethg8y oj7g) :xiznl+nf,t iz-16h ,of the magnetic hht)e,h n -n x1jg8ti7liozz, :g6fy+ field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at the ground,xk up+to 67.qn 107 +6xpnkuto.q m away?

  How much current must :hm1mdh/ p9ld5dl lb+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 carrying a ckngr+ , a(tg:b0 rcy5sxw)ea8urrent of 5.0 A is the magnitude of the magnetic field due to the wire equal to the gxc raw +t s:b nk,gr08e)ay(5strength 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 uts +s5*r 5jai)vno(a directions. They are separated by 40 cm. What is the magnesus)nv+5ija r5at(*o tic 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 currents (+kgpmzv 8 +eaxd38pt of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. Whte8p83 m +zp (vakg+dxat is the magnetic field midway between the two wires?

  Two long parallel wires carry currezd+v:g2rsd.sg s p0.p ibf1x .nts 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 con0g. .+bfs 2pg ps:i.sdx1dvrztributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direcqb+-eduimwu4t u 1e ;6tion. They are parallel to thw+bduite1-4 ;ue umq 6e 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 other wires?

  Two long parallel wires carry currents of 5.0 A anp442blos/0x u fhn2qnb; +f vsd 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length b vxn+ 24ql2bfn s0bhpo /fus;4etween the two wires.

  What is the magnetic field at thec* o-z.;ax5/pigmqq ) yrlk9q center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flopx*- . q5im)k qo;qc/9y rzgalws in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. Wh fi,g;ytoqbf,vx+v 6rja.8; dat magnetic field is produced at the center of the solenoid when a current of 10 A r f+;.f 8v,x6a;ygoi,t vjbdqflows?

  A solenoid with 500 turns is 0.10 m long and carries a cuv1tjryw;b:p cyyq8) br,y /9 srrent of 4.0 A. What strength of magnetic field will it have at its centjp,y1 wbycr8yy):r;9 s /bqtver?

  How much current must pass through a 400 turn coil 4.0 cm long pccv;dv0;vh+ :wnk9qto generate a 1.0-T magnew ;q0v p9kvc: ;+vdhnctic field at the center?

  How many turns should a 10-cm long solenoid have if it is to /sa wt; .e ;-lu4dzzabv7 umu6generate a $1.5 \times 10^{-3} \; T$ magnetic field on 1.0 A of current?

  What is the magnetic moment of a rectangularzn 7tqz 8l:xz2 loop of 120 turns that carries 6.0 A if its dimensiz8:t z7xnlq2 zons are 4.0 cm x 8.0 cm?

  A circular loop of wire 9/kdh;o9avklwr5 d j/of radius 0.50 m is in a uniform magnetic field of 0.30 adk /j9;ro9v dk whl5/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 magnetic field?

  A circular loop of wire of cross-sectional areaoke: 7g sb.7gz $0.12 \; m^{2}$ 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 h0 gf6 he4sp)jqnp3c8a magnetic field of 3.5 T. The loop has an sn 0hph4)p j68qegf 3carea 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 d08 w 2lzrun u+ws2jkrz7 +:sam is in a uniform magnetic field of 0.30 T. T8uz0rs aw72 w l:2ukjsndr z++he current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wirevk;.q vmk8.iw:s* x kh of radius 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 torque when the plane of the loop q*k km:vkx8 ;wi..svh is parallel to the magnetic field?

  A circular wire loop of areasur i o/e(qt3e(8w,v h7/el* x1qxxcr $0.25 \; m^{2}$ 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 (c:eb+*s6 ycazi harge 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 rbo7 jl8:up .fvelocity $6.9 \times 10^6 \; m/s$ 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 ad0khons/v. 7 h 4c+wpk potential of 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resultp 7ohwd.kvkh+nc04s /ing orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic fi aoq8aj unx(unr 0b*:g fq2u.-eld of 0.30 T oriented perpendicular to its direction of motion. Determq nuxq-o: 8uab 0*rn.jga2uf(ine the radius of the path it follows.

  A beam of electrons is accelerated through a pothm)863 3fg uggfjz gd;ential difference of 10 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 tg3u) ;g8gj dgz63hfmfhe particles are to be undeflected?