If the north poles of two bar magnets are brought close to each other, thedn,i 27ttf6ahp fk(, h magne(k2htt,hid n 7,f fpa6ts will

  If the south pole of one baf5v3q 7/hj/dio 7d;jootfxh5 r magnet is brought near the north pole of a second bar mfj3qo h5/idto5xf7h; 7ovd/jagnet, the two magnets will

  If a bar magnet is divided into two equal (49a g3z5vmoohk4 t k5vjg/lwpieces,

  The Earth's geographic North Pole is magnetically 0(phhq8x1x (yz)bktm a

  The south pole of a magnet pw w) vmuytg an4c6x9lfk08:x +wy j*c.oints toward the Earth's

  An electric current prod+8oepy *uo1x xuces

  Which of the following p+,vd fs vlw5j3qq 6qv:xu61 mis correct?

  A vertical wire carries a current straight down. To the east*w+cks.de)eu of this wire, the magnetic +)k cse*e.ud wfield points

  A horizontal wire carries a current straight toward you. From your 4sxnqmu)o:w, point of view, the ms,ou:nx 4m)qw agnetic field caused by this current

  A current carrying loop of wirefl*b 8wkygj87x 5x up3 lies flat on a table top. When viewed from above, the current moves around the loop in a counterclockwise p53 lw7*fy ug8b x8jxksense. What is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circula injios9* 8 d in d+ceuahal0s9-9l6/sr loop of wire lies flat on a table top. When viewed from above, the current mhs* l8e 0dsu+/n9ai 6cald j i9i-9sonoves 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 f15gurir c l6p li/(j+eield is the

  1 T is equivalent tob:gei pg3uo c;mv3x( 70mupe;

  The direction of the force on a current-carrying wire in a mafv/8n)vy uk*j gnetic field is described by which of the fo*v /n y)f8vukjllowing?

  The force on a current-carrying wire in a magnetic fieldaa*9)smicr++d upm (nt 9i4,zaf+ad4utds0 t is the strongest when

  The force on a current-carrying wire in a magnetic di,c :;6 :jejui l;)xnivn8q pg,rco7field is equal to zero when

  A vertical wire carries a current straight up in a region zpokltq -) xt tzxx+ v,d./n185uxd1hwhere the magnetic field vector points due north. What is the direction of the resulting force+5dx8zd-k1nqzl/oxxx )ttvp t 1.,h u on this current?

  A charged particle moves and experiench;i 6+dzsfk8e ;uufw8es no magnetic force. From this we can conclw8hkz;deu+ s f8i;6uf ude that

  A charged particle moves with a constant speed through + ez0/b fbrx0zur: n9fj)/egt a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particlzebfnbe/ x: j9 +zf0)0tg/r ure will be maximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnj0 nx dw,r1-epetic force on ,xr1jn0de -w pthis particle

  A charged particle is injea*d - 8-,qybsp xhvs d a)f*,r8ssy3ekcted into a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particlek -b sfr*) qsp3 8,eadd8svx*hs-y,ay will

  A charged particle is observed traveling in a circular path in a uni5 x(thihj+qm75jb g- wform magnetic field. If the particle had been traveling twice as fast, thembj-7xh5h( wj+i tq5g radius of the circular path would be

  A particle carrying a charqlqn6k,;/2qp x,0z yoi f j;bkm) rx.5 lypw(rge of +e travels in a circular path in a uniform magnetic field. If in0xlr(.jqkf lqw)b,;r zqp2 56 ky xn,;mio/yp stead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an elvehu(ui -dc:.t x,z t:ectron moves eastward at speed V in a uniform magnetic field that is directed straight downward. The ehu,uix.:-vct(ztd : magnetic force that acts on it is

  An electron has an initial velocity to the south but is obsexk-4b5x+1i2y .:j+h ocu1g6ptah pdqnh:ecerved to curve upward asoy:+:j2+bhekdqxu1 c5n-ie cp pxt14 h.h6g a the result of a magnetic field. The direction of the magnetic field is

  An electron moving along tt5woz g h.3td1he +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 the electron? (+xz1h wtot. d3g5 to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight curro tr(1 t4 ne0b1cpsoo+ent-carrying wire is

  At double the distance from a long current-carrying wi 61ez8xhlztap g0 (zui88q8pcre, the strength of the magnetic field produced by that wire decreases toe8u10c i(th ga px8 zq88zp6lz

  Two long parallel wi sconh 5a/r,2qv/8qqrres placed side-by-side on a horizontal table carry identical size currents in opposite directions. The wire hco ,rsavq2q/nqr 58 /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 point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a hoq+q-r y 7kdv;p;yf4s vrizontal table carry identical current straight toward you. From yourqr+sv;q;-7 yd kpy4 vf point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magno8/hiv0sd om3-ly5oi itude 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 wirls h30v i/-d5ooomi8yes?

  A long straight wire.6odgtq-l dok8+usu( carries current toward the east. A proton moves toward the east at. od-(duk sqg8l+6o ulongside 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 the bn n nwk:4m;ak7ottom 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 nknw7 nka4:m;your right?

  Two long parallel wiresc(j04ubz.qpu+ ln/ bi are placed side-by-side on a horizontal table. If the wires carry cur/pb+zuibcl.0j nu4 (qrent in the same direction,

  Two long parallel wires are pl61.ytik ,k*)zk skchvaced side-by-side on a horizontal table. If the wire,z6kts.yikvk* hck) 1s carry current in opposite directions,

  Consider two current-carrying circular l *w,+ t1 dj 9xob*cyzsm0whgu0oops. Both are made from one strand of wire and both carry the same current, but one has twice tc*w 9tzu sh,wyo+ 1mj00 d*gbxhe 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 2svhicux9j a z5 mn(42from one strand of wire and both carry the same current, but one has twice the radnmc59xzhu4i(a j s v22ius 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 currentk :8ndc f0rd.s carrying loop occurs when the angle between the loop's magnetic moment and the magnetic 0.8:scddrnf k field vector is

  When placed askew in a magnetic field, a current carrying loop b0jjcj6r9 izqo 3xh-wxr,.+pthat is free to rotate in any direction will experience a torque until its .xh0jqj ,rw+o 9- ir3pj bcxz6magnetic moment vector

  What fundamental fact underlies the operation of essentiag 8yxx yw+7ay8lly all electric motors g8+x 8ywyaxy7?

  A circular wire loop lies in a horiz7 igbj98 z /fv.qlgn1ee6jil*ontal plane on 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 dips below the horizontal. Which side of the coil tends to lift off of the table because of the torquez6be *. iqijfvl8/lj ng7 91ge caused by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and 5m(cz+ eh + ybs))8+fkzkydjpcharge q is accelerated through a potential difference V and allowed to enter a magnetic field B, where it is deff +b(y)m+)zz58skjcp k+dheylected 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 char53 ,gdyovy.t m1.(hid r1xwvgiyo z c d+g-;t;ged particle 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. What1mhv yigty3rzgyc1id (dtoo w-g;,.5d;v .+x direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is oriented parallel to a uniform magfum+ h6 kac chc4c5r27nufc6c 7ha+4khr 5cc2m etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10v/bp9ymdy- cc ( 4h-gu 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 s m)aqb7ttba4xx/ 9w2d traight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? wm adx) x7qbt49ta2 /b The wire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m l qaxcpt(7g63qc8 w- tw l.,ywfong 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 cancel the weight of the rod?wgyapf t7x-q8(t 3 wlq6,cw.c

  A stationary proton is in a uniform magnetic field )0g6xifrwl l: of 0.20 T. What is the magnitudeigf)6xr w0l l: 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 spee1b5tcyk0l4ny*vpv 5zd 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 osf.m1 k/mv+a+k6odj tfwh you *,8/qof $5.0 \times 10^7 \; m/s$ 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 travelingbgpz g)c9e n p/( 6ooe9;umkw: due north 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 spew5(ninz5rqk e4w y2nu9yuc-fm18 6b yed 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 ech,dkx5/ jbgc.6 /1xvnlwm: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 acceleration of the electron.

  A proton has a speed ofzg )wqb i(kg2) $3.0 \times 10^6 \; m/s$ 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 carr1f8o31x u*jwmzz7okqies a current of 25 A. What is the magnitude of the magnetic field at a distan 1wjx o81u3qzom7fzk* ce of 0.15 m from the wire?

  A high power line carrying 1000 A generates what mag,g/)lpr3jm r jnetic field at the ground, 1jlj pmr3r)/g ,0 m away?

  How much current must flow for dc hfk4rj58ic/f4r, gwv3l*z3 kdh 8b$1.0 \times 10^{-3} \; T$ 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 the macmiala zb;3);z l 9*hzgnitude of the magnetic field due to the wire3bmllz h;*ai) c;az 9z equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents o-q kd-rtw5u5i 5 mvg8af 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the 5 gi-u5qr-dk vm58atwplane 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 i p23 z)e egc8/jofh 7l:ml5nic1(xjjon opposite directions. The wires are separated by 0.20 m. What is the magnetic f2 c/15mol)e c8f:pj jo (egjl3znh7ixield midway between the two wires?

  Two long parallel wires carry currenp4i aa1ld z/s 5izj-e4ts of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point betwz-/a45szlpi d14ajeieen the two wires are the contributions from the two wires the same?

  Four long parallel w(6 nlye,jqj g. y maj1w7yfb*z 9h8h,uires each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass through the cornersy81y*6enqz,awy7, jjjfbmh ( lu g9 h. 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 carryvty7xhjn.5c*3n 6wr1ws j2pb currents 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 betwtp6.hr y bcn5w21n3wxjjs7v *een the two wires.

  What is the magnetic fieldpy :vwltdb(p8.17z a q at the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flv a:pb.zqdw(1 ty pl87ows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of wire. What mz6hh:y61jn p)g urd-;aql(zdagnetic field is produced at the center of the solenoilqr;zg:zn1-hy u p 6ajdd 6(h)d when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carrie w(x c4ta.y3yis a current of 4.0 A. What strength of magnetic field will it have at itayct4.3yxw (is center?

  How much current must pass through a 400wfo1 -dtup x6jd;b z6vqe-: nz;i*f -r turn coil 4.0 cm long to generate a 1.0-T magnetic w:vzdxo*;j6-ntfqpfd r - i b1; 6e-uzfield at the center?

  How many turns should a 10-cm l w0czm/ *dl16)knpmh fong 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 reu x,kjc1tv3c/ ctangular loop of 120 turns that carries 6.0 A if its dimensions1uc vc/3jxtk, are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0y,dyutf3*va n x43wd ;ix**fq.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 is perpendyqi3,xtufy3; af4d** v*xndwicular to the magnetic field?

  A circular loop of wire off*/ jd h xr0gfsv-07zv s4ep.p 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 iklc7g1aq3 smqq* tnn 1s;qz 6.n a magnetic field of 3.5 T. The loop hs*az1.6m;l q1 qnqqc g 7tnks3as 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 o s3o1 a1ca. hpvzng 63+/sprirf 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 is parallel to the magne c6hs1/nr3g+a1op z vasri.p 3tic field?

  A circular loop of wire of radiusa*(u*d)hfcy4 5 t shdp 0.50 m is in a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is yd*(c*hdstu4a5p ) f hthe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of area gvi18n .dnq .z$0.25 \; m^{2}$ 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 parus y,p2 (6yzyrkn: fbg3wb*1s ticle (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 wz r*b03g h0/arfwcqt07qfx6h ith 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.l p ql7 5ac1kv7d2pun(0 kV and then moves into a magnetic field of 0.040qavln 5 pc7u2dk1l p7( T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest through 500 V. It enters a magnejw 8*r/iaau2 otic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius w /* ruij28oaaof the path it follows.

  A beam of electrons is dzwac6q )ao4.8 yy2uo accelerated through a potential 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 requid6 yo.a8oazw24uq) ycred if the particles are to be undeflected?