If the north poles of two bar magnets are brought close to each other, the magne+i5+ eom7c vihts wil7iivem+5h o c+l

  If the south pole of one bar magnet is brought near the north pole ofio)e gz1m:ocz*n 99o k a second bar magnet, the two o n 9ig)1ookz*9m c:ezmagnets will

  If a bar magnet is divided into two equal p;u k,s/ klx7koieces,

  The Earth's geographic North1 ((ojnk)t2.8uiqlfc 4gnf xb Pole is magnetically a

  The south pole of a mal;+ea 7slz9 kjgnet points toward the Earth's

  An electric current prod81/hll9 w g kj5dw*psyuces

  Which of the following is co,j*r1a d fq lz3bjg1h0c: ,ev54hk behrrect?

  A vertical wire carries a current straigho.bw: te,:3frnav* dzt down. To the east of this wire, the magnetic fitw dofevr3 :z,:*.bn aeld points

  A horizontal wire caituktb ,2 h 8bwqa35c+rries a current straight toward you. From your point of view, the magnetic field2bita + u,wt58hk cq3b caused by this current

  A current carrying loop of wire lies fl :vzc7 mzcu5 *rr46ikgat on a table top. When viewed from above, the current moves around the loop in a counterclockwise sense. Wv g:u75*4zcrz6 k cimrhat is the direction of the magnetic field caused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wiwpbs7d 9(h4i j:c 9 br.gzlw5qre lies flat on a table top. When viewed from above, the current moves around the loop in 7 . gbwlbqrw95(c4s:ziphd j9 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 fiel,8vlrcenym6en;0 + ni d is the

  1 T is equivalent to k*c,h 20* dxksy9nsar

  The direction of the force on a current-carpfp;: * 5dto1bj9snq orying wire in a magnetic field is described by ws 9onqpd*51;po bftj:hich of the following?

  The force on a current-carrying wire in a y-ene eomrt d* mim26jzj+922 magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field is equal to ze)otgkp)p 2 lswft ,6e-ro when

  A vertical wire carries a current straight up in a region where the bj f dumd3/v 5ptpr+9:magnetic field vector points due north. What is the direction of the resulting f brdmtdpp5jfu:v+ 93/orce on this current?

  A charged particle moves and experiences no magnetic force) gll45p(2zdkq +tw tmtj:;je. From this we can conclude );mzl 2jj:kwgeptt 54qld(+ tthat

  A charged particle moves with a constant 2g c h73r:4 cgjbhfx7cpfq y;/speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force actingf r3 ;hgcghccf 4:p7yq2bj/ x7 on this particle will be maximum when the particle moves

  A charged particle moves across a constant magnetic cagwe,r v)we i3s k63* b70tksfield. The magnetic force on w7),w*r 6is 0vescgk3t a3keb this particle

  A charged particle is injected i +*ax yftq8t*onto a uniform magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the ta8of*y+x*tq particle will

  A charged particle is observed traveling in a cir x1wywat*m: p37njh- bcular path in a uniform magnetic field. wn wp3tmh-j:ax7y1*b If the particle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels iofc 7j sv/i8htk5;ve .p +njo9n a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of fo+tio evnc ph8;j.k 5s/v9j7the circular path would have been

  At a particular instant, an electron moves eastward at spee2dou4v o cm69gd V in a uniform magnetic field that is directed straight downward. The magneticvo6 od4 9c2mug force that acts on it is

  An electron has an initial velocixzkq,2xz 4k0c ty to the south but is observed to curve upward as the result of a magnetic field. The direction of the magnetic fi,4x zxq0k 2kczeld is

  An electron moving along the +x axis enters a region where there is a uniform maiebe rvln 7:x)zn3k 9i37il j9gnetic field in the +y direction. What is the direction of the magnetic force on the electron? (+x to right, +y up, andk9) ib 93 xlnl7:j3eiezrvi7n +z out of the page.)

  The magnetic field produced by 8t tzwg87 wwi4a long straight current-carrying wire is

  At double the distance from a long current-carrying wire, the strvacndv7.i9(; wk8w woength of the magnetic field produced by that wire decreases tv.na7 (owcv k;9idww8o

  Two long parallel wires placed side-by-side on a horizonj/w a(-9qjw10j),ewi ic jk wital table 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 field at the poc/wk-ja q wj01jwji( e) ii9,wint exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horizontal ta:ls fcj*(sj d+ble carry identical current straight toward you. From your point of view, the magnetic field at the point efj* d: +jlcs(sxactly between the two wires

  Two long parallel wires carry equal curwp xal0835fc 9k tv(vzrents. 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 f lzx( cavtpw3v5 9f80korce between the two wires?

  A long straight wire carries current toward the east. A protfd;j4 u-e a);,zzg2thjvsu7won moves toward the east alongsid;)fajjutvhwgzu,z2- 47es d;e 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 carr ex) 8)+bp4 ado/trpsqies a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is movined/arq+ obptx )s 48)pg 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 horizonti9s*igs5sd-;vx,sbe3z s ij)al table. If the wires carry current in the same s i*,s;35 v)sbi-gzd 9eissxj direction,

  Two long parallel wires are placed side-by-side on a horizontal table. If the p i8r-7 0)i+ngtlspfowlig0-p8sf+ i t7po) nrires carry current in opposite directions,

  Consider two current-carrying circular liyrnuikn z* /4k)h3(q;b6+me 0ig bspoops. Both are made from one strand of wire and both carry the same current, but one has twice the radius of the other. Comparese)04nbzki rqn6 (u k+g;imbyp/i3h*d 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 st3f+x db.j.qlcw ,0e utzwr/8qrand of wire and both carry the same current, but on dur qftczw.+w3b0ex, 8jlq/.e has twice the radius 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 ou, ,5nmnyj 5hxy(/xgsccurs when the angle between the loop's magnetic moment and the mag ,n ,/xj5yy( 5mnghxsunetic field vector is

  When placed askew in a magnetic field,kfy /4p fp0/ /cypo*v,i xsoc, a current carrying loop that is free to rotate in any direction will expkcc p f//yvx0y4iopp f,/os ,*erience a torque until its magnetic moment vector

  What fundamental fact underlies the operationh/e ltpd6;c;q-lw* z fv2ym5k of essentially all electric motors?;2fv5*c e mqtwlyl /6pd-;zkh

  A circular wire loop lies in a horizontal plane on a table dea t +4uke yn9if(2ia;fos3f+i 4gn8and carries current in a counterclockwise direction when viewed fr4yuf s9kdo3+e 4 iai(;n 2i8+feanfgt om 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 spectromet4j e ;gy;tf9yper a particle of mass m and charge q is accelerated through a potential difference V and allowed to enter a magnet94fypgy e;jt ;ic 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 ch/c/ toyz;bbmy8e 7pa5-l 3 f4jk)oyyt b+u/fmarged particle passing through crossed electric and magnetic fields. The forces exerted by these fields are in opposite directions, and only par fe+78f5 m3y/;/tlumoyjy pcbb) -zt kya4b/oticles 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 f4k g vdywwuhudkn4x;1:uj5q i*,u0+ a current of 0.60 A is oriented parallel to a uniform magnetic g +4 hwwuuuki4 j5*;10 n:xd y,kuvqdffield of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current 2a 9xonsu a,b9of 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 straight wire carrying 5.0 A when it umy/gd(avni+ 4c 8)bais placed in a magnetic field of 0.020 T? The m/8g )+ad a nybcui4(vwire makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m loip ym23 m kqb6zll8ob/nw15u+pq:r*lng 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 cancp 5*lkmz21pqo3r8n q/:iulmb b 6+ylwel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What is b f/b/jvqo :u2vv1z:nthe magnitude of bnjf:1u q/vo2bzv v:/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 o5w - hgzyyfu85 m.w(w/socotbv;g44speed 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 e3u5alxx-hcy)i *hk) a 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 d8 a*dvqn6;fo (rokj; 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 axpg69o6yaydz-h aho s*-:t tf*0*p vg 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 witzhd.0 z0 (ekmhh 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 acceleration of the electron.

  A proton has a speed of lyg;l oxi, 985f of3hq$3.0 \times 10^6 \; m/s$ 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 ck 2, f dewfu1jbq h4h;s61r/uvjwk63earries a current of 25 A. What is the magnitude of the magnetic field at a distance of 0.15 m from the wik e;ejqd4f ,vhw3shku16/1fr6 j uw2bre?

  A high power line carrying 1000 A generates what maglnjj r8,omx1:* hporhq 7f6 1qnetic field at the ground, 10 h*o:6 qmxjrf1 nh1 qr8 ,j7plom away?

  How much current must flow p, lcs75;j:wfqfc6fx 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 strai(i)iut su3 yq-xbd 5:sght wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire:b isxdt)(uiy- 5sq3 u equal to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents dplk u)b-,5qhp j+ l:nof 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point that isl5lkjhq ) ,pn-p+ubd: 20 cm from one wire and 60 cm from the other?

  Two long parallel wires carry currents of 20 A and 5.0 A kzf vj3vdt m3b5p3*o6 7oap(cin opposite directions. The wires are separated by 0.20 m. What is the magnetic fiel bv oomv*dt(3fpczj35kp76a3d midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in bx6z t.c2/xpoopposite directions. The wires are separated by 0.20 m. At what point betwee2to.p6b cx/x zn the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the sam*kk -il2;vgzyg pvy3 :e direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positioned iliy*g v2y zkp;v-: g3kn 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 rf k2z3vm-g /rg)e8kj5dp3lv 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 lengrjd33p ) -5m8zgvgk vel2/kfrth between the two wires.

  What is the magnetic field at the center0kuj5v6b0-fj* f+ u uc m(hskf of a circular loop of wire of radius 4.0 cm when a current f-0uu 5ukf0mf vhbjj+6k(c*s of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 50fu73)f7u4 nawy.tim l 00 turns of wire. What magnetic field is produced at the center of the solenoid when a .u743t i7ywn)mffla ucurrent of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current o*m91jh*( wcany xr:qdf 4.0 A. What s*1:(w a xc9rjn*qy hmdtrength of magnetic field will it have at its center?

  How much current must pa9p (kd z/:jhxiss through a 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field xpdk9(:hj zi/ at the center?

  How many turns should a 10-c3 ,ia qg.g /..dovclvnm long 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 rea izw9re,7foa)lvt2q*4 jnz8 ctangular loop of 120 turns that carries 6.0 A if its dimensions a)if,o tlz9 ew4v2r8a7z q*janre 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field 1 bu qmf*9mhp)rl s,a:of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the planef:hu m1m r,q9pl)*as b of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross: y6wnr+3d6pw9fdoz k(v+wnv-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 in a magje9ex xs;h 5vx.*az 1xnetic field of 3.5 T. The loox e1vx;5 axex9*.js hzp 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 wt -qw /9cph/wf,fs+ nxire 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 is pw ,fc +/wnpshxt /-q9farallel to the magnetic field?

  A circular loop of wire of radiuy+x 6fi4axg z1o ,2zfos 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 magneti6z o14z f+a fg2,xoyxic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop9z do wzvv4ip0: 6hwd(ld 50gd 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-charged particle .+n7 d 4fyjnrux-ien7(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 velgjw)g(wq3nybdvp ) n02/ ubp; ocity $6.9 \times 10^6 \; m/s$ 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 3l - 8uncdka6cthen moves into a magnetic fiud8c-anlk 3 c6eld of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is accelerated from.hl7jj +elur7 rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction o7 jhljuel+7.rf motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference of 10 kV bew8v3) nuo +h.znj-kzl1 t* hlcfore entering a velocity selector. If the B-field of the velocity selector has a value of 0.010 T, what value of thel38h * wl n kth1+u-)o.jvczzn E-field is required if the particles are to be undeflected?