If the north poles of two bar magnets yhltoy2n serc w k;,0w(/t4x0are brought close to each other, the magnets willn0;wt(h2tosc4xl0r, /k w yey

  If the south pole of onekhq kqp0 2qu/0 mk))on bar magnet is brought near the north pole of a second bar mak0 /qhkm) opn)q0k2u qgnet, the two magnets will

  If a bar magnet is divvyo:1d ; ovmi+ided into two equal pieces,

  The Earth's geographic North Pole is magniiy1/pk4yjg+ etically a

  The south pole of a magnet points toward the Earth'swea( uuqva2,m76j9 oc

  An electric current p(vhud+ utq9k a w(*km:roduces

  Which of the following is corre koti6c1lpn:af 39, cv1sg*pf ct?

  A vertical wire carries a current straight down. To the east of this wire, tsaz** bnvvz,9. 5henzhe magnets .a9*zhb ,*ev5nzzvnic field points

  A horizontal wire carries a current straight toward you. From yeymb-va xw +x+fjr61/ our point of view, the magnetic fiel 6+bxfj/x 1amre y+v-wd caused by this current

  A current carrying loo)ojw jlyhf p 9 5t0xigw8i9(u/p of wire lies 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 current, outside the l h p/wi8jy(9)ij f0uxlt5g 9wooop? The magnetic field

  A current carrying circular loop of wire lies f: 4xgix)(6bhxbg 5 rcwlat on a table top. When viewed from above, the current moves around th)x 6 :b4g bgx5rcwh(ixe 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 fie7eab 6ipm;5t euj 5ut2ld is the

  1 T is equivalent to z1fa e kyivk46daa);4

  The direction of the force on a current-carr3b,m3r. dso*t,-fv m 3te kbwrying wire in a magnetic field is described by whi,* f3b-d3eo.bvt rm3m s,tr wkch of the following?

  The force on a current-carrying wire in a magnetic fimb0:;*d ( g3nlgjnouceld is the strongest when

  The force on a current-carrying wire in a magnetic field is equal4 (x;qcp9vrrt to zero when

  A vertical wire carries a curren9(9ihjaryf / ct straight up in a region where the magnetic field vector points due north. What is the direction of the resulting f hir/yac9(9fj orce on this current?

  A charged particle moves and experiences nr(gw,su60 wm3 k mwe bgrg ,l e(+gu85ywpo+4do magnetic force. From this we can conclude3s4d0wm ,wegpg +wroewyg6 8( lr(um5 + u,bkg that

  A charged particle moves with a constant speed through a region where a uyut v+n,p rwp7ao):b c;6 nzt5niform magnetic fieldnw,+ctyoapt6v:r5 )bpnzu ;7 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 across a constant magnetic field. The magnetic force ow co:;n2/r ucmn this particleo: /2mncrucw;

  A charged particle is injected into a uniform magnetic field such tha-xc j+hewj1 w i)4 pb q6z-a.y38tais/)aff tlt its velocity vector is perpendicular to the magnetic jwfye-a lat)+6jb h4/-w)x1 zii.tapq3 csf8field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in x;t635 jejtdo a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path would jt 35doxe ;6jtbe

  A particle carrying a charge of +e travels in a circular pm+r6k2, vs jbjfb8fc3ath in a uniform magnetic field. If +f,rb8j6 ms2bv fjc3k instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an eleca6teyb1 3o7qdtron moves eastward at speed V in a uniform magnetic fiel6ab3yqt e o7d1d that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is observed to cur)6eyhr44mat*b daa :lve upward as the result of a magnetic field4may ard)b:4*l et6h a. The direction of the magnetic field is

  An electron moving along the +x axis enters a region4b+nv8dp jhflzb (/j , rvx//y where there is a uniform magnetic field in the +y directib/x/ jb h y pn8+d(,lzfv4vjr/on. 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 lonus ob;kdbf9z 1(0v f4 f2uxww8g straight current-carrying wire is

  At double the distance from a long ca1a w1wtau(0e urrent-carrying wire, the strength of the magnetic field produced by that wire au(1awt1a w0 edecreases to

  Two long parallel wires placed side-by-side on a horizontal table carry itwu x 8uxo (-:tdr(kn1dentical 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 ma((tudwn: r8k - oxutx1gnetic field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal table u(7 y3dndqq .4phkr+ucarry identical current straight toward you. From yourh7 u rd3qy .k(4q+udnp point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currentxqp:o4qun()tc-s j h ;x5:l pas. The magnitude of the force between tqp;ansj ) c(qp: -5ol4h:xxu the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries c.ao4(oo dteh tb mg+5um4s2r9urrent toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force on the pro+mr4 msobde.4 925hot o ugat(ton?

  A wire lying in the plane of the page carries a current tow;fmzb*m v.t;u+m5l u/6vv csuard the bottom 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 pzmlusf5buv.+;/6 vm mc* t;vu age, from your right?

  Two long parallel wires are placibeb /n-jwm6* ed side-by-side on a horizontal table. If the wires carry currenibme *w-b jn/6t in the same direction,

  Two long parallel wires are placed side-by-side on nkj3d 45sa5gca horizontal table. If the wires car casjknd55 43gry current in opposite directions,

  Consider two current-carrying circular loops. Bot* 3cyx7cb e d0qnnuw8,h are made from one strand of wire and both carry the same current, but one has twice the radius of then0udq c3,y wc8xn*7be 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 yg15eqi4ltqzn (v e3.xi 7v1a3q1q n bloops. Both are made from one strand of wire and both carry the same current, but one has twice the raiin(317vz1q.5eb3qx nlqq ygav1 te 4dius 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 carryingt*p6*lt j j;qr loop occurs when the angle between the loop's magnetic moment and the magnetic fietq6t **;rlp jjld vector is

  When placed askew in a magnetic field, a current carrying loop ,sw ;r4: 2ydp0vmnxl fthat is free to rotate in any direction will experience a torque until its magnetic moment vl4y; 0 pmv:r2sxdnf,wector

  What fundamental fact underlies the operation of m,p6c -vrh-upessentially all electric motorshv, cm-p6r-pu ?

  A circular wire loop lies in a horizontal plane on a talivw95(y ho q000mgky ble and carries current in a counterclockwise directio(y0k0ow0l 9vyhmqgi 5 n 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 and charge q is accelerated througzeqyo: b:j- a*b xlbl)r1j-y7h 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 pbj-aj7xqor:lz:1)y by* e- lberpendicular 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 particl0x h7g*4s gw8twao,ic e 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 followx 7g*g4 s,a8hwwcit0 oing, 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 0.60 A is oriented paral )bcx;g539gxp9a fv *mn 7soqtlel to a uniform magneg75a9optmqx )v3*fx 9g b;snctic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A ij3y6r dt- 0oyt y36bsiz nu+q/n 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 wir)n( iseitg;4 be carrying 5.0 A when it is placed in a magnetic field( iei)g;s tb4n 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 has a mass of 0.050 kg and is in a mv0(znlbq k+hbb/83 u magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel thzm0 k8h+ vnu ql3bb(b/e weight of the rod?

  A stationary proton is in wasf ;,3a4i. ujb8xw c:lk f3wa uniform magnetic field of 0.20 T. What is the magnitude of the slx3wja, ;afb uif: c .8wk43wmagnetic 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 0wdlyj)kv48auenja xy9 7j 0 l r)*d/fa 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 :7 cr.p/midd8bi,wwi 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 d) ayv-mftqgiyz pjlw:o- *;80ue 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 speed o/i:. 83cav lwjdwidp.f $8.0 \times 10^6 \; m/s$ 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 speedz1 fv.ys0,n71goud kew k0 kt; 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 ofag zhjjub4 ++/ $3.0 \times 10^6 \; m/s$ 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 Ab6i 1favpza q088k nk3. What is the magnitude of the magnetic field at a distance of 0.15 m from the wirif830q8zk 16pakvn a be?

  A high power line carrying 1000 A generates what magn*)lu2m h9h 9a* baoytxsv-dd3etic field at the ground, 10 m -*o9 stdd lmha*yux 32) 9vhbaaway?

  How much current must flow for s al*xe3wu:4ryc 96yr$1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire /2t k5m+upo wbcarrying a current of 5.0 A is the magnitude of the magnetk+p tw52u/mb oic 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. Thefpq d*ty3ny6ui r3*g.+l0koc y are separated by 40 cm. What is the magny 3qd0+ g6 iplnuok*.tr*3cfyetic 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 currqunk8gfc2fwf- 4 -xr+ents of 20 A and 5.0 A in opposite directions. The wires are-ur wq-kx + fn4c2gff8 separated by 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direct 4m17o m(c bc jgwgt(ki,x8de*ions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wires moxc (de (w1ci7j m8gb,4*gktthe same?

  Four long parallel wires each cv mm(32rmk:git1 9buh arry 2.0 A in the same 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 e9 t2r3ukimb:1 m(mhvgxperience due to the other wires?

  Two long parallel wires carry cu7m,jjvyz/ 5lcrrents of 5.0 A and 8.0 A in the opposite direction. The wires are separated z,lj/cy5 v7 jmby 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a cir,czkc4 ibq /pv ytl7x3+2i :/jajct3fnwaq3 8cular loop of wire of radius 4.0 cm when a current of 2.0 A flows in an+/icx y3b ct3l7z, :/i jwv84 3patqfkqcj2the wire?

  A solenoid 20 cm long is w-c6j3eassw1 4hw tj8oound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 81wt3e w 4achs6sojj-A flows?

  A solenoid with 500 turns is 0.10 m long and carries a cjj3. .k7 3xa5c twzsf. :owxbrurrent of 4.0 A. What strength of magnetic field will w:.zr.tb.3 x3 5 xcj7wjkofsait have at its center?

  How much current must pass through a 40 zuq/v+k)6zbv pa;ja60 turn coil 4.0 cm long to generate a 1.0-T magnetic field a aqvb/zu apk );+vj66zt the center?

  How many turns should a 10-cm long solenoid havfea8m 27pr3 7lyojt r,e 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 that carries 6.0h 26a373gt achg gbn:d A if its dimensions are 4g :7g2n6h h3gad ac3bt.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is ilp 8f hr*1c7kvn a uniform magnetic field of 0.30 T. cr*7vk8f1 plh 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-section a(5ua p.c z;odj mw*psg:zz4,al 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 currentkhensa8(f t)8reb ;h)frgu( - of 2.0 A is in a magnetic field of 3.5 T. The loop has an)-)eu;ba ( 8(sgrff8hkertnh 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 a uniform magneti uqc 8v9 dh(*zoa1 tk2iv.i6hac field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loopcd9. a8uiiq(khazv tvho21*6 is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic blu2 wgopu4tb*)u yjj2-g n9eb. /7edfield of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of j*wuljgp-beu2u dyb/n. bto2g)e4 97the loop is parallel to the magnetic field?

  A circular wire loop of ar4ag md-vj0ih :ea $0.25 \; m^{2}$ 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 (charge avu/79nnq8 pte) 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 ve1tx:q: 1 qo va.+0sqwwnbtdd:locity $6.9 \times 10^6 \; m/s$ 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 rtmd a + v41.7ym/vphzof 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radiu7yv4 dv+1./ pahztmm rs of the proton's resulting orbit?

  A proton is accelera6+(myp b.nl21az gy puted from rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicula2pum(yp+yb.g1l 6a n zr to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is 2*k447ok c9zyt+cy9 rlo(h j dj tiu/caccelerated 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 required if the particles are to be undeflecoc47i2+t chuj99kl odzyrj/ 4 k*yt( cted?