If the north poles of two bar magnets are brought close to each otwt) q:oju-u8(. r c kf:0kdqb o3ya/qvher, the magnets wilkq(av 0y/j:r ok qw8cqotb:-3 udfu).l

  If the south pole of one bar magnet is brought nea3gn4l :8xnp zhr the north pole of a second bar manz:xh3lp g8 4ngnet, the two magnets will

  If a bar magnet is divided into two equal piec1f8lhgp -mi /ses,

  The Earth's geographie cxa1uv-h/dv i g4zy9+7m9lj c North Pole is magnetically a

  The south pole of a magnet points toward the Earth't be601kxj 57wa;p*c wfmxtn3 d,dz3ps

  An electric current producz/ue kg wu5 x4/a;)xyhyw)yz;es

  Which of the following is cor(d5)9gj unp durect?

  A vertical wire carries a current straight down. p7x00 .ltw;ti yzi3svruh 0k4To the east of this wire, the magn4;t7zh0t i3 r u0k.l0wyspivxetic field points

  A horizontal wire carries a currenu6+1a;n /vdo ; s:ay+pdmkcqot straight toward you. From your point of view, th;k+ q d;s:my 6v/au+co1apdnoe magnetic field caused by this current

  A current carrying loop of wire lies flat on aqecke9 *i0:e iwet1n+ vmo /84yzzz.6 l+megy table top. When viewed from abov/4e ey ek96 0l i+*v oq1ee tzwcmz.in8g+:zmye, the current 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 of wire lies(9htaqp-do bh ke 20m* flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this currema*hk h-9bod pe( 20qtnt, inside the loop? The magnetic field

  The SI unit of magnetic field is thz+z(mv0tj1vsv b4d : ie

  1 T is equivalent topgar*hbrq3q50q0ttn5e q - e u ww(8+i

  The direction of the force on a current-carrying wire i+)xwk- *upul a b-4s-iyujh- c)af 3vwn a magnetic field is described by which )-u- f au+ *-bxwu h)c-3k4liyvpsw jaof the following?

  The force on a current-carrying wire in a magnetic fieldf .9r a9 .w5fbzyj)gca is the strongest when

  The force on a current-carrying wire in .c:7)fpon gcwa magnetic field is equal to zero when

  A vertical wire carries a current straight up in a region where the mak9qa5t;s ns/az-g sho79 l )bkgnetic field z)5q-g;s9lnb/s a7 h9 ok tksavector points due north. What is the direction of the resulting force on this current?

  A charged particle moves an *urw 1lajmuk ljo*39p1m 1eq,d experiences no magnetic force. From this we can concl ual*u1pl1k*,wj3e o j1q mrm9ude that

  A charged particle moves with a constant speed thrrey- 4o3 sfq6jough a region where a uniform magnetic fie3o6 ejfyqrs 4-ld is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves j 8 gcvgw(iofu ; 7g1/g+l7n-v9amqyhacross a constant magnetic field. The magnetic force on this particle9w7 h-ngau7+ (fim8gv1olygv gq ; c/j

  A charged particle is injected into a uniform magnetic field suct637 t92 2cqsleif gf e.sgw:bh that its velocity vector is perpendicular to the magnetic field vector. Ignoring te9e sl2qcig 6:.wb2tg73 ftf she particle's weight, the particle will

  A charged particle is observed traveling in a cir)zg -+0v5u;ta ;vpws foo 9kkdnf c24dcular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circul cuk zk42;v)sogow 0fdt; dvf+ap95-nar path would be

  A particle carrying a charge of +jf0 )7j yn;vgs. o)ppre travels in a circular path in a uniform magnetic field. If instead the particle caonyp 7vjs0)pr.f)j;g rried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward zjh0h2e/;1/ktw wgwjat speed V in a uniform magnetic field that is directed strai1/gktj w;jh0zww2 /ehght downward. The magnetic force that acts on it is

  An electron has an initial vn8h/i 1dxp7gv)gyktb . 0d, jpiahg01elocity to the south but is observed to curve upward as the result of a magnetic field. Then1 dky,gx/1i) vtjh.0b0dh 87pg aigp direction of the magnetic field is

  An electron moving along thlul (vp15 xx+x,isvkj vk8c,5e +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on thespxj,xc 1luvv5kx 5k+(li8, v electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field producedj ,gqc i5:8wed8 -bq3(khrim n cc)mf5 by a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strength of thewons2ol lu0 ,vll42w 5ihm 4,p magnetic field produced bvli2l ,huoo 4nw0, 2 5lwplsm4y that wire decreases to

  Two long parallel wires placed side-bn62p gem(4;t aw5cmfiy-side on a horizontal table carry identical size currents in opposite directions. The wire on you( cnfe;pt2m w46mgai5r 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 point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal tablr(dr cbn4o:s 6e carry identical current straight toward you. From your point of view, the mag 4brsr:c6no(d netic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the force betwey -m6e oc)b6ydke4k-een the wires is F. The current in each wire is now doubled. What is the magnitude o be me6cke-oyydk)4 -6f the new force between the two wires?

  A long straight wire carries currenr 0s7/ ub9 *g9c,fzrnpjcw1 gprdqn 28t toward the east. A proton moves toward the east alongside and just south ofn9dc7 gj8 rp*19qrg, sz cbup/2wrnf0 the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a curre d+zbz hy *8bkpk(o8af+x.sc )nt toward the bottom of the page. What is the direc( bbakzk sy xd+8pcz)o*+ hf8.tion 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-side on a horizonty+knj(odwl :qukw 0 1w4k .u71v5yeufal table. If the wires carry current in the same direc7:ldk(v1yf+.0kqy jo ew 5w wuu 4nku1tion,

  Two long parallel wires are placed s)g1fin i+ 3gxtide-by-side on a horizontal table. If the wires carryn1i +)3xgigft current in opposite directions,

  Consider two current-carrying cird7 0uscjq8gp 0cular loops. Both are made from one strand 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 smaller loop, the magnetic f gqp 00sdu7jc8ield at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from onw qq3.7m pcta(5o6ot ds: 8wfce strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smaller loop, the magnetic (aw d385.opfscq mtctw67 q:o moment of the larger loop is

  The maximum torque on a current carrying loop occurs when th1ynnw :5o r h2;3tr txkuaqay)v;c7h2e angle between the loop's magnetic moment and the magnetic f1:tr a wohqr;yt 5;73hcav2nn y2)xkuield vector is

  When placed askew in a magnetic field, a current carrying loop+-xadks ulyv,xk i bum8l: 6t/8k9y;gm y2sr; that is free to rotate in any direction will experience a torque until its magnetic momulum;;ys 8:g,l9m x6 bsidyrt/a+2 8-vxkykkent vector

  What fundamental fact underlies the operation ib1,onp4wr z4q izi/9of essentially all electric motors?pq/9w ,4n rz4zi1 iboi

  A circular wire loop lies in a horizontal plane on*iov ) ,slqh/e a table and carries current in a counterclockwise direction when viewed from above. At this point, the Earth's magnetic field points to the north and *,lsh/ivoe q) 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 part3z+ jt :smguo,w6y a(ficle 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 ayums wj6a tf :3,g+z(o 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 pa2rehsxf7 do+lb 7 1v7fg h-l9trticle 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 northot v92h lx+7fl1heg s -br7fd7. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a ulrmbcuf ),2yd8k0 4soi6xi8dniform magnetor)68d 48dliumbsx0f i2c yk,ic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1hyp3+a );bwmnu5tsha1fp v00 0 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 straight wire carrying 5.0 A when it is pla 8lo+y 8xbb23 qadev0xced in a magnetic field of 8 d2o 3e0xvl 8+abqyxb0.020 T? The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long e e.q6et-vh0hhas 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 oree. 0t-h heq6vder for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is the magtz 9i q -m)-(g*qigtkbnitude of the magnetic force i )gmtgi-t*k(b-9zq qon 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 wit/x kzv;my;t 0dh 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 ax etht2q9yq (; 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 nam*6cg+42sp zbfeou(i8 o*w,f2 btgl 0js /rmorth with 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 of :wnw kk/ 728qu: xmf-ypfo;s st*e.ku$8.0 \times 10^6 \; m/s$ 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 so gr z qr+r*wb6 .(,vel;nwqp9peed 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 speedqpe ynve6a k2xf+g448:7 csfz of $3.0 \times 10^6 \; m/s$ 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 magnitudcd k.hn-a7;b 5urxdbt5n7mt 1e of the magnetic field at a distance of 0.15 m from thebrmu5k77b ; hxt n5-dtndca 1. wire?

  A high power line carrying 2dyxdkv 9.iq m1mtm02 1000 A generates what magnetic field at the ground, 10 di2mt9 x vq.ym0km1d2m away?

  How much current must flow for 9kk q)9+c5iktdz qn/c$1.0 \times 10^{-3} \; T$ 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 th14m( d ymab/bje magnitude of the magnetic field due to t b/bmjady (4m1he 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 opptp.s5 bg9 xwihro 32:qosite directions. They are separated by 40 cmbx.o:qst3ri 5 2p9gwh. 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 currents of 20 A and 5.0 A in opposite direm2.whgmm*xs b cax 1v uv3o;+g5:ok1i4cir ; nctions. The wires are separated by 0.20 m. What is the magnetic field midway so5m1b.vcvk;;+x:ghcm igwi *om 12 xu3a r4nbetween the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite dire z1vf7q 2* 5z9qhgtnpoctions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires the 1n2*qf5zz gphq97vo t same?

  Four long parallel wires each carry 2.0 A in the same dirx gp 0pzr3x; r5wkf2.eection. They are parallel to the z-axis, and they pass throufe. g5x3r;r p w2z0xpkgh 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 currenth31n;my:yza- m/ tcaw s of 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 b 1c/ ahtyw :3mayz;-nmetween the two wires.

  What is the magnetic field at the center of a circuxzz8n.chy q ,5 bx 2j/3vij4dclar loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wire qyz5/dic j82x 4jn. cxz,b3vh?

  A solenoid 20 cm long is wound wiji mvn6x+fi1a.7 hf/ kth 5000 turns of wire. What magnetic field is produced at the center of the solenoid when anjif.m +/7i 6kfvxha1 current of 10 A flows?

  A solenoid with 500 turns is 0nvx5sd,vcw y),+bzu ).10 m long and carries a current of 4.0 A. What strength of magnetic field will it have at icn xs,,v5+ )y vbw)zduts center?

  How much current must pass through a 400 turn ziz93swjts5qqbp;48 ap/ 3p pcoil 4.0 cm long to generate a 1.0-T magnetic field at th3wpi;45 bqj a93t8zpp z sspq/e center?

  How many turns should a 10-cm long solex t10.z8h m(b x-txnpbnoid 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 d4k pxm0/s*,bg*dp m g /ij5nkloop of 120 turns that carries 6.0 A if its dimensions are 4.00*/ngkj5d pdm,/i bkxm *4gps cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is i+z*ib q jg0mki1v8jx3n 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 isj gi mbkzxj*0vi831+q perpendicular to the magnetic field?

  A circular loop of wire of cross-sect ertzmg)4qb5 p o53px/n-x:od ional 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 is6cdl-v 3zr3zz pmrh :x7n +qq- in a magnetic field of 3.5 T. The loop has an a 7 dz36rxqn-zlvzmh3: r+pc- qrea 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 fi( b :zer(m36pmhoz0yueld of 0.30 T. The current in they upmrzmz0o (6ebh(3 : 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 wire of * k(h9se,tovu q70ve cvc2 yjjc, 02k4binwn/ 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 lo y4wc 7 j2 c0vjkcn0n*s2i(bhe/e ,tv,q9vokuop is parallel to the magnetic field?

  A circular wire loopo.sf.2x:*q f9n6 vdtb 1nsnxt 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 single-dl 7h4ab 9xedk73qo50, cg).atarl yecharged 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 velocizvf*d jwb )l,v/1v;8y ob* 3xr/ nvcamty $6.9 \times 10^6 \; m/s$ 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 throxragu5f to zx1 ,s:;8nugh a potential of 1.0 kV and then moves into a magnetic field of 0.040 , xsan5;gr18uo :tzfx T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnetic field of -xl 3xggcl0hd4,v dm /04c l/vgmdhg3-lx0 ,dx.30 T oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 1f.q-sbm 4vluojmt*5 0uh 9e e,0 kV before entering a velocity selector. If the B-field of the velocity selector has a value of 0.01sv9jbot-e5um 04l* qe,.fu hm0 T, what value of the E-field is required if the particles are to be undeflected?