If the north poles of two bar magnets are broughqq-,ttoje52io iprd oy07mw( * j+x8ki hn .u-t close to each other, the magneti, -iqu wmor+h *ot50je(7j82opqny tdk.x- is will

  If the south pole of w u1oz1o ,vqd/one bar magnet is brought near the north pole of a second bar magnet, thq1zuood vw,1/ e two magnets will

  If a bar magnet is divided into two equ2.j41syc8zx ;ohgj yjw0t:u sal pieces,

  The Earth's geographic North Pole is magnetiiockls 5*b3bn8o ,a9o cally a

  The south pole of a magnet points towar .5bk jkxvu(h +hdjicvm,i 2)gzt4v 27d the Earth's

  An electric current pr8 xk8*c:ep qq,uq1b9y2veso woduces

  Which of the following is correct?8 gi (tox1z/ah

  A vertical wire carries a current straight down. To the wmpj5s xk0rrk az) 7)7east of this wire, the magnetic fiexmaz0p rk)j7swk r57) ld points

  A horizontal wire carries a current no9mf4l,v * w7m 2bcmostraight toward you. From your point of view, the magnetic field caused by this curre9 n7vmmblf m,oo4*2cwnt

  A current carrying loop of wire lies flat on a ta:icq,g:on,l/j0bgngv j41naf j qo-;ble top. When viewed from abov;flavjb n ,/o c4g0,njogq:iq1 gj-:n e, 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 magnetic field

  A current carrying circular loop of wire lies flat on a table tf/ eixc:b1.::ezf oh vop. 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 the loop? The magnetic :vfh:/c .x 1eb:eifzofield

  The SI unit of magnetic fieldmvmx ye):di5sfmt u9 ww6p c34zr+66 a is the

  1 T is equivalent too:iabo r)y) wp6+ ,oz3yave-mt zi;1z

  The direction of the force on a current-carrying wire in a mx dlau+/2;4st 5c+tpi9 u)iv1vadwm jck-( fnagnetic field is described by wha5 ()iipkvc a2dftl-u+ 9dt1x;m w+s vnuc/j4ich of the following?

  The force on a current-carrying wire in a magnetic field is the str7, y* fqymphe4-biid +ongest when

  The force on a current-carrying wirebss; v5jd+ :/)o wdeb i.j9vki in a magnetic field is equal to zero when

  A vertical wire carries a current straight zw,ju a a)p6zabb3jg-)wj;2 hup in a region where the magnetic field vector points due north. What is the direction of the resulting force on this curren);u),6 awhbwgzb3z paja2jj-t?

  A charged particle moves and experiences no magnetic force. From this i9a vrqc4(( enekb:n- we can conclude thr9: (necniakb (v-4qeat

  A charged particle moves with a constanhb//:/+w ugxq.plug w +0xenit speed through a region where a uniform magnetic field is present. xwbl + 0niwh/qx+guu/.e / pg: 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 3;t2z 3. ohhigtk2uf ofield. The magnetic force on this zh3oo;22g 3 th.ukfit particle

  A charged particle is injecte3mpv lktnm/n4 oibq;g ,9le9+d into a uniform magnetic field such that its velocit v,kmllnq34gopt+ib n /9m9;ey vector is perpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a uniform m/x+h59t3-j4y umg.. l4ssu yo iiuqcvagnetic fie 5+uli y9tci/myjv3ss gu.44-hu.xq old. 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 in a circular path in a uniforyf r:mm u3xiej /8zrb9u a89)im magnetic field. If instead the particlie:b3z9)f/ma98i xum yjr ru 8e carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastwardqlyag7mx + 7o8v.v+ka at speed V in a uniform magnetic field that is direc7q k7 8g a++vlvxoa.myted straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is obserc64 y9ko4s61zgc8el3 cg jzua ved to curve upward as the result of a magnetic field.czg9 u 4g46k3yjecal 18szc6o The direction of the magnetic field is

  An electron moving along tu3nn9qrd wpbh2 kled):h/aq((b ok2 ) he +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force (dpaqn)2hb b k /qko:l3e(9)nd2 wurhon the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-caruiv) 4l/jzz n ,zmc:n;rying wire is

  At double the distance from a long current-1y /wc40 qixbhkir ,z3carrying wire, the strength of the magnetic field produced by that wire de rwy 0x,kc4/1i3 bqihzcreases to

  Two long parallel wires pla/4ln55hnh apz5 : opxeced side-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 on your left carries current away from you. From your point of view, the magnetic 4pohza xnh5pnl / :5e5field at the point exactly midway between the two wires

  Two long parallel wires placed side-by-side on a horiz9bprv;bhm ; *pda6w7xontal table carry identical current straight toward you. From your point of vvaxm;*pb b6rhpdw; 97iew, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. T7yq*q1 :ftp-ikcx wf9he 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 wq f-:1witc9y fq p7k*xires?

  A long straight wire carries current toward the east. A proton moves toward q0in qc4b*kn/the east alongside and just south of the wire. What is the direction of the forceiq 0q 4*bkcnn/ on the proton?

  A wire lying in the plane of the p76pv a da g+c0ip(-tvah(+wwvage carries a current toward the bottom of the page. What is the direction of the cpdw p7v+0((agv-t avwi +6hamagnetic force it produces on an electron that is moving perpendicularly toward the wire, also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-sidabv; ,kaj+ n)d*bt5im)yv l6r e on a horizontal table. If the wires carry current in the sa,vdir a);k nymv*65b+jl tb)ame direction,

  Two long parallel wires are placed side-by-side on 8 .nc lsgivb/.a horizontal table. If the wires carry current in opposit.c/bisg 8ln. ve directions,

  Consider two current-carrying circular loops. Both are made from / tah 6jr5o*rm3 2;rxx2x jcvrone strand 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 mxrhx22ja6 rc vr5;*to/3xjrcenter of the larger loop is

  Consider two current-carrying circular loops. Both are made from dcv.1m t6sd9sone strand of wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smallervmcd 9d ss6.1t loop, the magnetic moment of the larger loop is

  The maximum torque on a c+qsreot,1 2 l0aeqow 0urrent carrying loop occurs when the angle between the loop's magnetic moment and the magnetic fi0a1ql eo t+,eqw02orseld vector is

  When placed askew in a m d(++t wrkt-isagnetic field, a current carrying loop that is free to rotate in any direction will experience a torque until its magnetic (k+i+wt -t rsdmoment vector

  What fundamental fact underlies the oapql.d8r tz j8ui1 +y.peration of essentially all electric motorsryju.8qa+il .t 18p zd?

  A circular wire loop lies in a horizontal plane on a table and car ln 3gk-hsr7u7) aw02y tj mn0qtm*fh/ries current in a counterclockwise direction when viewed from above. At this poinr kj7 3u-hy / 0nqganmmtf)0w7s2 lt*ht, 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 x: qjsj ,youg:xg;me6e.bk6 b9;p8h sis accelerated through a potential difference V and allowed to;:6 6sx8ey bq;:hox p9.mgu egj, jbks 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 mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a charged particle passing throug(pogk ih 3t n0o)dr.4nh 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. What direction should the electr.4pn t)3(or k0nhgio dic field point?

  A 2.0-m wire carrying a current of 0.60 A is orientx2*1)dlvj s-kdxwa9ux yg4r 2ed parallel to a uniform magnev j2wdx-r)*dyx1lk 4sx u2 9agtic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a dir:cixy*wcja4+sgp; m3t*8 onnection 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 ca)u mdb1z m7ppk)ue72w rrying 5.0 A when it is placed in a magnetic field o e77m ukwz 1pd)mup)2bf 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.bps;purest)qf1q ga i- *1h*: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 weighaqr1i fp*-t g u eq*1b;phs):st of the rod?

  A stationary proton is in a uniform magnetic field of 0.20 T. What hy cdynu), d)z-aq ,1xis the magnitude of the magnetic forc,)h u1d q xcdzy-)any,e 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 speed*dijlbho 3pb)x rd0u2/r 8 w4b 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 of z0gu7 ef,f8mw7n 8gvspn0lp + $5.0 \times 10^7 \; m/s$ 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 nyy: 46( rxjuez5-jomworth 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 ad jm n(o)c6hb p :1bqt,:*yhslipw2,dg n) dk/ 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 u:majjlgqt70f oq0qr *y:o 5 5a 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 ce 8;cp5cil4 .1xkmou$3.0 \times 10^6 \; m/s$ 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 Ate vqu8b;; zn .n32bu9 s;uhgp. What is the magnitude of the magnetic field at a distance u; .z;2n t;nhupqgb 9esb8 vu3of 0.15 m from the wire?

  A high power line carrying 1000 A generates what oa cg-wiyq 9;1magnetic field at the ground, 10 m awayoya1g9;qw- ic ?

  How much current must f21 fxh o5x 4+p4t iq0wyjyokduiw;c(v-xn 0) flow for $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from 0j 8aivr 6bwny2z7 ;yex/oowqn.:4wogo4t a. a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equa4 7gjooywq.04ior8n6e zowt /. ava : yw2x;nbl to the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currel7wvdgaf7. 3n *m rra;ijw z53nts of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic fieldvjraf3 5w3;rgnz la.mid w7 7* 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 o :y8n y3ortu0 zr/5k)wcewh8 directions. The wires are separated byr)tnz/wur0k8: oh8 owe35cyy 0.20 m. What is the magnetic field midway between the two wires?

  Two long parallel wires carry currents of 20 A and 5.0jstd7 zgtib yeft+. 9+/r- y(c A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires ayt d+y( itb e ztc.r/f7s9g-j+re the contributions from the two wires the same?

  Four long parallel wireseu-xrce.1 hi v1k3zh6 each carry 2.0 A in the same direction. They are parallel to the z-axis, and they pass throchz 3uk riexev.1- 16hugh 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 5.7arr vv.f9g.l * jtz/o0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Find the magnetic force per unit length between the two wirfv g zrr.*/ol 79jvat.es.

  What is the magnetic fiel(q iz vt5* ey0cotwf-ji61/hs d at the center of a circular loop of wire of radius 4.0 cme0vtsq*i6jo /f- 5( hz1icy tw when a current of 2.0 A flows in the wire?

  A solenoid 20 cm lon /2 0hdgju3f+zmzr,s,d3qib wg is wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid whzdhbq,d +sjf 2 3rm,g u03izw/en a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a5)koxg1jxbd 9ia .7 yt current of 4.0 A. What strength of magnetic field will it j.9yb g)adt x5 7kiox1have at its center?

  How much current must pass through a 400 turn coil 4.0 y63ds-ut1m5 z3g qh,n zas 2sbcm long to generate a 1.0-T magneg5d 3z uq 2zmasb,st3 s-hyn61tic field at the center?

  How many turns should a 10-cm long solenoid have*/ uwe8 5xtb1fn4j ksi- yys;a 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 lov ,k6z7u z-vmlop of 120 turns that carries 6.0 A if its dimensions are 4.0 cm x 8.0 c6zvm-l ,7 vukzm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic fi ayw -di-yt+opha92f2eld of 0.30 T. The current in thpo a f- -ydi9y2+wt2hae 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-sectional5e5qcffl o-n8cy)hu j6p:nh 6 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 cuof90b(-) w f*-hg5nzfbt sib urrent of 2.0 A is in a magnetic field of 3.5 T. The loop ha 9b (-zf hs) utb-0b*fof5ngwis 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 of radius 0.50 m is in a unif.l0o f1x1qexlorm magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the planefl 1xxel1o q0. of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is inm16 o8b9q xefy a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnb6f1y89o ex mqetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop of d9y) u)8k /cotg/e+lymbb: jlarea $0.25 \; m^{2}$ 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 (ch bf (zn9(zt.sdiu(n7l qejbc27ib61xarge 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 rs (6tfe(- k0vjjcbn 83ahwdmbs 83 w*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 om zci).pegrgh;d 6 olr*n-m,4f 1.0 kV and then moves into a magnetic field of 0.040 T. What is the radius of the proton's resultinen m;cd,g.igh 6r) l z4mp-*rog orbit?

  A proton is accelerated from rest through 500 V. It en69 ,yp-ouge/ /hhh ojzt1 eic3ters a magnetic field of 0.30 T oriented perpendicue 9ipc-,613hjztoue/hh gy /olar to its direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated throqbj8-8e;p3u tr6 teg iv. e)wgugh a potential difference of 10 kV before entering a velocity selqe gj tp6b) 8t3;er.u8wvgei-ector. 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 undeflected?