If the north poles of two bar magnets are brought close c)en*dbu0 tx7dxh67;fa) :pum gp3y kto each other, the magnets wce; )3 x7mt:y d k*fdgp60nux)pb ha7uill

  If the south pole of one b5.h.ki n8nf +)wbz rw/ajoh)iar magnet is brought near the north pole of a second bar magn h zrfniw5)ji+bwh. /na.)o8ket, the two magnets will

  If a bar magnet is divided into two equalhh164zbq 0x6g zul.7brm wfu9xzq4f v3sx )-g pieces,

  The Earth's geographic North Pole is mauru5uj*-pw y1* e 1hd5ct4 v.zxcrjzedk*f* 1 gnetically a

  The south pole of a magnurqzk 0;bf xb. jlk,(m 6bcil3 y7c13jet points toward the Earth's

  An electric current prog.psiy)cn 0;g, oqo+ wduces

  Which of the following is coo23q vqqa(:e*loejn+bo9 ,jmq x*p n(rrect?

  A vertical wire carries a current straight down. To the east of this wire,-kw;oi-hy t p6z+l+ (plz)pkp the magnetic l y;+wkppo)6 k l- ptzzih-(p+field points

  A horizontal wire carries a current straight toward you. From your point ofyr .l, jwppuj2vh*:2j view, the magne.,:*urpp hv jj jyw2l2tic field caused by this current

  A current carrying loop of wire lies flat on a tabb:6 wo 7vgevq+le top. When viewed from above, the current moves around gobwqv+:ev 7 6the 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 flat on ad* i( a-uihdmr-p*coe + h)9eq 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, inside th+ur pdcdmqeih )-h9* -e*(aoie loop? The magnetic field

  The SI unit of magnetic field is t:hx 0xctm1(1axfqig4he

  1 T is equivalent to hkqodjn4 v d(01m-e/.uqni2w

  The direction of the force on a current-carr2 jax ;oi5ump4ying wire in a magnetic field is described by which of thejpux5o2 ;4ai m following?

  The force on a current-c9t kse1,g-qzqarrying wire in a magnetic field is the strongest when

  The force on a current-vx2/uwh1gi/k:d s(dslg7 oq 1carrying wire in a magnetic field is equal to zero when

  A vertical wire carries a current straight ye as 5.13fj 3hzb .bf12cwgpiup in a region where the magnetic field vector points due north. What is the direction of the resulting force3 c1z1hfyjgeb f.a53 p ibsw2. on this current?

  A charged particle moves and experiences no magnetic force. From this 3nj e:p4kyj.hf o8 ko-we can conclude thatj ohynp. kkj38e- :of4

  A charged particle moves with a constant speed through a region e v. f5gz fm(s2 781bujcsspxm z;g,6jwhere a uniform magnetic field is present. If cxpsem7f.g1,5su;z g sf m jz6v 2bj(8the 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 cerm3aehe+ 15 .r a5xcforce oxra5m5 a+h3rcee c .1en this particle

  A charged particle is injected into a uniform magnetic fie z(9d4:rucrv/ do.nh (vkwo+ild such that its velocity vector is perpendicular to the m/ ih( zrou v.+n:k wr(cod9dv4agnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path ib*iu.g/r,*mkk bq a;kn a uniform magnetic field. If the particle ham .,;gqk**ik/ubr kab d been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in a circular path in abp/p8my9/w k25 sb vah uniform magnetic field. If instead the particle carried a charge of pv5k92 // shbwpa8mb y+2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V ifrdu8w4t c7 k/hp+*bwn a uniform magnetic field that is directed straight downward. The magnetic force that atwh7brf8dwuc *+ k4p/ cts on it is

  An electron has an initial velocity to the south but is obse 1c:cz3 weqe h2fbzbubnu5r6.4ym6q; rved to curve upward as the result of a magnetic field. The direction of the :.rz qe1fu6;beb 5 w2qbmu 6y h3n4cczmagnetic field is

  An electron moving along the +x axis enters a region where there 4(s f-od r ,),swhi i2xvurgb)is a uniform magnetic field xi) hbs(,wdo sr, 42rgf-u)viin the +y direction. 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 long strac 0fea9p:zoy :k(a1 ycight current-carrying wire is

  At double the distance from a long current-carrying wire, the strengw (*dhbi 5wti2l,tb d1th of the magnetic field produced by that wire decreases h bitd25wblit,1(* w dto

  Two long parallel wires placed side-by-side on a horizontal table cxae t85sgl2saof 8z5 +arry identical size currents in opposite directions. The wire oea25lstzga8x+o5 fs 8 n 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 ovkw;i1w* 0 (jo+mc hebn a horizontal table carry identical current straight toward you. From your point o+(wcm i01h; eobj kw*vf view, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. The magnitude of the fo tya)me hfr-y76w cl25 ,qky)vrce between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force between the two wi2cmv ,)wyhf6k75te aly-)qyrres?

  A long straight wire carries current toward0 0xlm-de+ tbn the east. A proton moves toward the east alongsi0bx l0+td-n mede 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 bottcj .q:ap .rcpr7; :vrgom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire, aj c.r;vrg.p: a rp7c:qlso in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a horizontal table. If theb+l.;1 8/xz0ecyu 6 ihk avpim wires carry current b8 iz m;0ek.i y6cl/uh+ pv1xain the same direction,

  Two long parallel wires are placed side-by-v+)5ds wzz u6f0r yf:pside on a horizontal table. If the wires cd)z 0usf6:+prywz5v farry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strgqc4* +d n1znv2kx yv2and 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 field at the center ofn qzkc2vy2dnv14* +xg the larger loop is

  Consider two current-carrying circular loops. Both are madikh745t t 8fu-4g b6mv vg3g )w)shdpse from one strand of wire and both carry the same current, but one has twice the radius of the other. Compa-ps) t)kwdg54hg vhmt3 gsbf48 v6ui7red 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 the angle between.( xzm)sm) r*g 5w: y2iqvoysv the loop's magnetic moment and ther5m)som *giw.:qvy2z v (ys )x magnetic field vector is

  When placed askew in a magnetic field, a ./j5evmo t7fy0e- zgbcurrent carrying loop that is free to rotate in any direction will experience a torque until its magnetic momen0fb.z-5y g tje/m7vo et vector

  What fundamental fact underlies the operation of essentially all electric motte7,y( mhp//jp vv4dsors?/ s/(e4p,dhty vmj7vp

  A circular wire loop lies in a horizontal h / me(zd/v r*td mwt83l7svg,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 mh /7zgvdl,3*e rwtvtm/s( d8 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 9hmb(o * arn5u5 hp*bkaccelerated through a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circular path of on rp5h*9h5bkum (ab*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 x(kxknqqa/fy0w;1 c 7a charged particle passing through crossed electric andwqcfq 17y/nkx(x k ;0a 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. What direction should the electric field point?

  A 2.0-m wire carrying a cu t5n+tt ymr74ys i)ae5rrent of 0.60 A is oriented parallel to a uniform magnetic7y54in5t m s+tr)eyta field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 1 *oh z64*w0r xn:izusz0 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 str+ ibti6tz0 lv*aight wire carrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wire makes an avi litz+0t 6*bngle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long has a mass of 0.050r9o5rt yyr icoh -y+j98+fmtq k /.v4rpd--pn kg and is in a magnetic field of 0.10 T. What minimum current in the rod is neqm9t-yy r y+of/d p58 pr-i.h9co+t-r4jvkrneded in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic field of 0.d 32 xnl mp+aid:0vuy,20 T. What is the magnitud d02+ nl py:3idv,maxue 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 s78/yf6j (6y iatgydtfs nlr: )peed 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 fcr(1w s- n(r4oz.y hja 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 nort3b q vp:aq2ac8 gdlyg35.s,cc h 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 spexh)si6zu x m:/ed 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 spee y0gplrf k1x4ap 33q+rtmb8g3d 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 speedt9ff*q/3 5 i.ocyf ajw 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 ca9.arh up c3r,wrries a current of 25 A. What is the magnitude of the magnetic field at a distp3 r.ruac9hw ,ance of 0.15 m from the wire?

  A high power line carrying 1000 A generates what m/nzr ; r,uqj8uagnetic field at the ground, 10 m awaynrr q/8 z;,juu?

  How much current must flowjasrfa(6zs 7(7 oey 3e 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 straight wire carrying a currend0x(kguqt w cne7dh: z38o8r5 t of 5.0 A is the magnitude of the magnetic field due to the wire e d58g n0 hr7wuoekxdz: q(t83cqual 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 di0 xle f*/-id)3 q9svp vndhry7rections. They are separated by 40 cm. What is the magnetic field in the plane of the wires at a point tha3)7 vehpi-*0rxvynfd9lqsd /t 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 directionsod 6kyt;g88k/c2gl phh;+i3 o*uzftg . The wires are separated by 0.20 m. What is the magofdt+ik3t;6 g82go*h uz8ckhy;l/g pnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A in opposite direcvko/e0 p o;1ewtions. The wires are separated by 0.20 m. e; o o1wv0ekp/At what point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A iau/1br-e8h6etx txr3 n 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 experbx6-xrh8aete 1/3 urtience due to the other wires?

  Two long parallel wires carry currents of 5.0 A and 8.0 A in the .wk 7h:vlinys.(spt-6eip8popposite direction. The wires are separated by 0.30 m. 6n.p(8w.vh syilp -i tp7:ske Find the magnetic force per unit length between the two wires.

  What is the magnetic field a; q.(dqhe up0ct the center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flows in the wirqeqh( ;dc0.upe?

  A solenoid 20 cm long *l ;c(2seoykd j s7g r,7qsll4is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid w;y7 l ssj,leo7sd2lk 4*cgrq(hen a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries ap:fk.htvfov+/ x 80 :c+cynqov y+xo) current of 4.0 A. What strength of magtkf+ :npv/ 8x.h+yycvfc +qo)0voxo:netic field will it have at its center?

  How much current must pass through a 400 turn coil 4.0 cm long to generaq/;qa h :k .-xsqyuq61 /mwxlote a 1.0-T magnetic auq 1:yskx;q q-x/m.6w/h qlofield at the center?

  How many turns should a 10-cm long solenofjq :2 bd.mnu gcx*3g+id 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 tus7xpyhve2drgc,g8h+a8 m , h/ rns that carries 6.0 A if its dimensiong8eghp+hm,r/ x ,hd 82ysac7vs are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50 m is in a uni+1k 0p gxkn.abform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of k0b+gx. npa1kthe loop is perpendicular to the magnetic field?

  A circular loop of wire of cross-s2vo1e gloo/6( ,c)x sb;/kcw s;gcipzrd. zv4ectional 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 fi2psaz:v-+/v*cz h eiua0ks e- eld of 3.5 T. The loop h-ek-eh*iv+a2c :azspu vsz/ 0as 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 wirgd34wozh+ i+ 0ln(,c zhxht. ze 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 whencz.d ih,now z+x03h (gtz4 l+h the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of y).ns6 g cek5i0.30 T. The current in the loop is 2.0 A. What is the magnetic torque 5)ck eiysn g.6when the plane of the loop is parallel to the magnetic field?

  A circular wire loop dflr it81; q 7s5vgpqcw(w8:g 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-j5o/ti+tb a (fcharged 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 wimrk*+5lo n8 h+ fn l u(qtz21c3ndtev4th 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 1.0 kV and thr /im klpkt78 b:2)jsq0(2t) rp sqkxien moves into a magnetic field of 0.040 T. What is the radius of the proton's rpik r:8 qxmj0sb2k(/2 qtlpk )rts) i7esulting orbit?

  A proton is accelerated from res53 p 6bjlhut+jt through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction oh3+jjup5lt6 bf motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a potential difference s 0p sr0u n(p:m77hmgqof 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 0n q:ps07umr pmh7(sg is required if the particles are to be undeflected?