If the north poles of two bar magnets are brought close to each other bf:2*h5 ne6n atkmp:e, the magnets willeh:mp2f:5* netn akb6

  If the south pole of one bar magnet is brought near tv8 (e wdfgoplbz a-vid l+/454he north pole of a second bar magnet, the two magnets wzlgp 4-vf5+d(av/e dobil4 w8 ill

  If a bar magnet is divaxyn: b k1ii7k56mf1u ided into two equal pieces,

  The Earth's geographic North Pole is may2b06q le q37wytmp0xgnetically a

  The south pole of a magnet points toward thefx/r o ) x8/w+ocia1t,wpa9 yp Earth's

  An electric current pro ww.fy4 6x sr9kt)8ox0 pr0seiduces

  Which of the following is cor5q*. )zd5bmsdwz mcmy9r n,/erect?

  A vertical wire carries a current straight down. hb6q *oz(/g-t6gwdjt h- o)mzTo the east of this wire, the magnetic field(* / jghqo6-m-tztgd )bz hwo6 points

  A horizontal wire carries a current straight toward you. From your poiob+e9dw rqb6+ nt of view, the magnetic fibqwod69 r+eb +eld caused by this current

  A current carrying loaw9 xcp.; n i(fyx7nm7op 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 loop? The magni7pyx;n(cfwxm 7. 9 naetic field

  A current carrying circularwh*cjo2 *.duo loop 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 oh *w o*uc.2jddirection of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field ;*fscfdx8:vw h s/ 5gvis the

  1 T is equivalent to :be0wxsnw, qj3q hy30

  The direction of the s6k35 ctrvix3force on a current-carrying wire in a magnetic field is described b5crk3 ivxs6t 3y which of the following?

  The force on a current-carrying wire in a magnetic field is the stronget1*lch, y)v 5lygy;duuy2 *elst when

  The force on a current-carrying wire in a magneticm8h;b/i6kv h agg60 vs field is equal to zero when

  A vertical wire carries a current straight up in a region wher9g* )a-*q seat (nxr(cwy by sz6l,dp1e the magnetic field vector points due north. What is the direction of the resulting force on,q)xlyass*-(*tn1ar zgy6 p9 dw b(ce this current?

  A charged particle moves and experiences no magnetic force. From 0;nfd zbysu:ef2vd1jr u oq1h3u 1*b7 this we can cohqy;1bff1b sevrz3n:7 ud 10duo2j* u nclude that

  A charged particle moves with a constant speed through a region where a uniform ljinq (r ;o b(a*;1wldl0)wku magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will b0i dl((a;w*qb lr u)nw ko;j1le maximum when the particle moves

  A charged particle moves across a constant magnetic kl*ro,p98rg b field. The magnetic force on t*go kb 89pl,rrhis particle

  A charged particle is injected into a unm.r1;fg 6c ckbiform magnetic field such that its velocity vector is perpendicular to the magnetic field rcmb1 6 f.gc;kvector. Ignoring the particle's weight, the particle will

  A charged particle is observed traafjovmlp4sl7 ) 8,g (1ul4- t4bkq b,q 9xuyebveling in a circular path in a uniform magnetic field. If the particle had been tra4(ybllq4u , 7epufl 4gq1 b9ksaxm- jo,)vbt8veling twice as fast, the radius of the circular path would be

  A particle carrying a charge ; a g9w/u+os4rc t)9lm6wixup of +e travels in a circular path in a uniform magnei pum ru; 4w/gt cwxa96)+sol9tic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, j2ww4 siobe o;k8o-:x2 mgcd *an electron moves eastward at speed V in a uniform magne:ek sobm *o j22w;owd8-cigx4 tic field 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 ai03:zy,ej g nto curve upward as the result of a magnetic field. The direction of the magnetic fi30y,: na jzgieeld is

  An electron moving along the +x axis elyp4x)91fh centers a region where there is a uniform magnetic field in the +y direction. cx41l y )fehp9What 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 long strb+*u9dyla mohq+ e+c-ra; m:p aight current-carrying wire is

  At double the distance from a long current-carrying wire, the strengt9kv+crmic2red z-l/ 2kgdf., h of the magnetic field produced by that wir v f2c e r.m9k/,2lzcdkri-dg+e decreases to

  Two long parallel wires placed side.v jt,.0y paua-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and the wire onj vpau..,tya 0 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 table carry ide n,yu+3h x b xmvew0hw3r;os41ntical current straight toward you. From your point of view, the magnetic field at the po13oux4e; hw,y3b0wn rx hms v+int exactly between the two wires

  Two long parallel wireccll:2dl( u y/s carry equal currents. 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 force between the two wires?uclcl2 l/d :(y

  A long straight wire carries current toward the east. A proton moves toward the ;/gzufze;v:)kmgbk vf+a m;: east alongside and just south of the wire. What g:evfza/vub; k m:g m;fk+z;)is the direction of the force on the proton?

  A wire lying in the plane of the page carries a b (:.umo+ eqbecurrent toward 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 page, frobe( e+m oqu.b:m your right?

  Two long parallel wires are1t i9eqc3z6ompy+wdb*uev w7)zq2 r- placed side-by-side on a horizontal table. If the wires carry current in the same diziqq+eym6 wrp7zv2 wde9-c13 *t b)u orection,

  Two long parallel wires are placed side-by-side on a horizontal table. Ifz.)zlhe* p;ee the wires carry)leee.p*z z ;h current in opposite directions,

  Consider two current-carrying circular loops. Both are made fr(0l;wdf;mj6 ozs qlg1 p q(hn1om one strand of wire and both carry the same current, but one has twice the radius of the other. Compared t1nhm;fjw0g qz 6p;sq1d(ll(o o 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 madevtr(zw 7urc.) from one strand of wire and both carry the same current, but one has twice the radius of the other. Cucvr zr7t)(. wompared to the magnetic moment of the smaller loop, the magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when tps7 6ew g a04vj-f*wgxhe angle between the loop's magnetic moment and the mag0j47 pe-wf av ws6*gxgnetic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free s +zewj: ) 8mn*lit)dfto rotate in any direction will experience a torque until its magi fl)t*sz:8j e+m)dn wnetic moment vector

  What fundamental fact underlies the operation wmy 38ngxf6fi1r74 g rof essentially all electric motorsm3ffixr ywn gg 8416r7?

  A circular wire loop lies in a horizontal plane on a table and carries curre c.e;17pcvwdn nt in a counterclockwise direction when viewed from above. At this point, the Earth's ma7d1c;.pec nw vgnetic 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 is8/aia 1njea7:f1qta j accelerated through 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 perpendicular to the velocity of the particle. Derive an expression for the n8f:qa1 j ti1a 7aaj/emass of the particle in terms of B, q, V, and R.

  A velocity selector conjv0xf4;cvu e;n. l t6zsists of a charged 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 th 4x;6t j.zf 0n;evvcule north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A iwlo41suph,500ihb kss oriented parallel to a uniform magnetic field ohip5k0b ,s 41h0 lwuosf
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a 8 4-u l5inozmswvw *,sv-nmm3direction 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 wh +zwie )pr56bs,iw0ghen it is placed in a magnetih, z6esi5gwbw) +r0 ipc field 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 s po*rac 1vde(812rrbin a magnetic field of 0.10 T. What minimum current in the rod is needed in order for the magnetic force to cancel the wei(rbe81so2vd1r r*a pc ght of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What isodre10j8xtfs+h-oz:dkja l b;w956 g the magnitude of the magnetic force on x ets8j z0 kl;gf o+6 91:dojd-hb5warthe 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 su6hehj 3*)j)k :xbm 1 awn,aj7su)honpeed 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 ovd . fhn) (z.u.zjpy5izsxr.7 f $5.0 \times 10^7 \; m/s$ 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 speep2z jno+t -s4pd $4.0 \times 10^5 \; m/s$ 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 wit,aln bo*rtj 7zc45qemn 0+n tn/j7(n qh 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 speed uwzco.ilt. jtu/pf) ; -lu5 c4of $8.0 \times 10^6 \; m/s$ 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 of5r 0b-ee+cpquodrjhy;:: af k)z*;he $3.0 \times 10^6 \; m/s$ 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 :.+ofzgg ib k1of 25 A. What is the magnitude of the mag:f.z ib+1ggkonetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whap(e5ezyeq r (n2qp8.kt magnetic field at the ground, 10 m aw ( kene(pp52qy e8rz.qay?

  How much current must flow fopq ovmr; i,. h 9ddelqm19z ta4,yt-d3r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a log*l.2jxa6tp np0k 9oq ng straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's m6gq pn*.0jlo2 kx9pa tagnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires fl ly8bi b(idn7d)c7,zo 1xg8carry currents of 10 A in opposite directions. They are separated by 40 cm. What is thi88b)bxifodl nzcl1 7d7y(g ,e 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 direcodhfd :2t4dp si og8jt/)h1 +n rn:mf9tions. The wires are separated by 0.20 m. What is the magnetic field midway between the two wirh h24 /sidgo)1:oj+tf9:rdmnfdptn 8 es?

  Two long parallel wires carry currents of 20 A and 5.0 A in oppos b g-nic+,jp7mi h,aaivc;9*gite directions. The wires are separated by 0.20 m. At whata gb,jm ci9 i,-h7*pc g+nv;ia point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A inj bq91zhcn/a 18b3 wkm the same direction. They are parallel to the z-axis, and they pass throug kam bnc1 bq38/h1w9zjh 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 and 8.0 A in tjw-e yo 2,ri0ihe opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length boi -2 wryi,e0jetween the two wires.

  What is the magnetic field at the c g6jg(e)fry sez(x;z:enter of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in tzrzj;sey(g ):x6fg(ehe wire?

  A solenoid 20 cm long is wound:qi bf6ik 0p+j with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A flows?:pb+jf ki0iq6

  A solenoid with 500 turns is 0.10 mg(h(8; yhk nl u0qi1jfmep4dm./ 8slh long and carries a current of 4.0 A. What strength on/g0ui 8shlq. p (jm4lh8my;(d1fhek f magnetic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 ( 6vjqrx-d(dsl2l f2/ lxoz4g cm long to generate a 1.0-T magnetic field at the c6(-sr d x(l 4dqzv xlf2jlo/2genter?

  How many turns should a 10-cm long solenoidkw35po i5db ys97 am/z 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 loop of 120 turns that carries 6.0d.l d8qwmiyu7lm*zube dx9;. r( /) yt A if its dimensions are 4.0 cm x 8.0 cm?ly.x9 ; u tmdludq/.y*8z()dwr e bmi7

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field ofsm4g l r**wn8l 0.30 T. The current in the loop is 2.0 A. What is the8*4rgln ms*lw magnetic torque when the plane of the loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-sectionalqb6ntk. b*v u3 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 magnetic field of 3.5 T. Thcj p+-+ qen4uve loop has an p vc4u +-eq+njarea 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 0.5m dn wg8snn/3h0 s8+hz0 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 paral8zds +n 3sh8g nhmn0/wlel to the magnetic field?

  A circular loop of wire of raqsg me0ysr6 gd l*8d(*dius 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 pls0(8 6syqgrm gd*de* lane of the loop is parallel to the magnetic field?

  A circular wire loop o:-1ru +3n8m1 j9anhh nnubil 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 (charge ez7at fv28v9vf ) 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 wits w-v vi-8r 9v88fkhjx4p1lphh 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 throga0 +;i*+7gimd3 wl9 zxdp kicugh a potential of 1.0 kV and then moves into a magnetic ficai; 7*lzi 30+gig+p9 xdmdwkeld of 0.040 T. What is the radius of the proton's resulting orbit?

  A proton is acceleratel6:gfw+m3rl39n/ id eu4by)ihs/e kzd from rest through 500 V. It enters a magnetic field of 0.30 Tne:gm) s+e9l3 zd4iuh/3/i bfwky l6r oriented perpendicular to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated t1fj d0s+yj 9) yzinv9ohrough 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 0s 1djyyz9fv j9+ion) the E-field is required if the particles are to be undeflected?