If the north poles of two bar magnets are e6o bkap3 oxgym.54myb47 y0xbrought close to each other, the magnets wog6m km35 yxypye 4oax74.b0bill

  If the south pole of one bar magnet is brought ne em6:gtze:2a uar the north pole of a second bar magnet, the two m 26amuz :egte:agnets will

  If a bar magnet is divided into two equal *x a,mu9tt19li5 ,xbli hlim .eil0r3 pieces,

  The Earth's geographic North Polexpzilc7od,p.uy3v5s8,z /he eyl* b xcc.5g+ is magnetically a

  The south pole of a magnet poin+ fga* ,0l0pkbm om6zuts toward the Earth's

  An electric current pro/;r8u oobk+v uduces

  Which of the following is*t 9fh90 m fsm3fb:u0vwxmp* s correct?

  A vertical wire carries a currljxf.k y3yvojlzi44* e q4df3x;a9o6 ent straight down. To the east of this wire, the magnetic fieldixz6x3a *v e 4lj4 oyfoj k4;dfy3q.l9 points

  A horizontal wire carhvr26o g9krsw:r::v tries a current straight toward you. From your point of view, the magnetic fo2 rsk9g:tv r6:hv:wrield caused by this current

  A current carrying loop of wire lies flat on a table top. When vi7e*k5 :lec nikewed 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 e ilk:*7n e5ckloop? The magnetic field

  A current carrying circular loop of wire lies flat on a table 8/wlzqir ;x emn(1 l6ytop. 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 e(86xl1l q;irwzmyn/the loop? The magnetic field

  The SI unit of magnetic field is thj95y: v1 :*lxu wnzw iwtep6ew c;)oo/e

  1 T is equivalent toc2b 5j:imt)nsw 8 1kmm

  The direction of the force on a current-carrying wire in a magne76,k5 f 7iadgh wr;ph mmted50tic field is described by which of the 7t7rdhhw,dmpe5k5i0 g 6amf; following?

  The force on a current-s*r ces4i1z.-k haz,scarrying wire in a magnetic field is the strongest when

  The force on a current-carrying wix2igh(qn4gx 3)n dk1c 55zinire in a magnetic field is equal to zero when

  A vertical wire carries a current stzf2o9 w7w. x/myj6e ezraight up in a region where the magnetic field vector points due north. What/ wjw97mo e.zyf2xez6 is the direction of the resulting force on this current?

  A charged particle m+lqu qxq2s. 3moves and experiences no magnetic force. From this we can conclude l s.qu q+q32xmthat

  A charged particle moves with a c o(xjk-p-qi(yb0( vvu 3, ndejii39j honstant speed through a region where a uniform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be maximum vqjx(d ,ip(ujh-9jn0 3 ibk(vy3 ioe- when the particle moves

  A charged particle moves across a constant magnetic field. The magnetic forc3 a f:ahu0rk:t9wo7;7xpnwjqe on this paraw3x:0o7tpk 7;: uanhr fj9 qwticle

  A charged particle is injected into a univ9l a/t* sem 6w6ws0(.psuefwform magnetic field such that its velocity vector is pme( ul6sssww0 v9w*6a/.tefperpendicular to the magnetic field vector. Ignoring the particle's weight, the particle will

  A charged particle is observed traveling in a cirwtdda6 +i5la03i8xyk cular path in a uniform magnetic field. If the particle had been traveling twice as fast, the radius of the circular path wo+63tay8l 05waidxki duld be

  A particle carrying a charge of +e travels in a circular path inrmx/)h xu*6 3 th70uqxj5ockene (+ ju a uniform magnetic field. If insteek/)ux0nhhm j6u*e+7xc 3( 5 ujtqxr oad the particle carried a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron moves eastward at speed V in a uniform3jowcnln4 pe*. c *nw, magnetic field that is directed straight downward. The magnetic force that actsoc*,4 n3wnnp *.jlwec on it is

  An electron has an initig.zco4dc; ao (utr j,,al velocity to the south but is observed to curve upward as the result oc, ,a.tu4d;jrz g co(of a magnetic field. The direction of the magnetic field is

  An electron moving along the +x axis enters c44jk,nkn; gi a region where there is a uniform magnetic field in the +y direction. What is the direction of the magneti4g; n k,in4kcjc force on the electron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by a long straight current-carrying wire is2si3b5 u tw.mvn9wmg.qvb8. n

  At double the distance from a long current-carrying wire, g5) 7) areuz;psg8el athe strength of the magnetic field pro;8e)z asp)ur75lgageduced by that wire decreases to

  Two long parallel wires placed sidtcn2 uv /kzfnhv)y v2i4mp s-*b48z4fe-by-side on a horizontal table carry identical size currents in opposite directions. The wire on your right carries current toward you, and thmbknf4 f vc4uni/ zt2)zhp8*-y2vvs4e 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 on a horizontal 7xfg8arn p g.4table carry identical current a8r4x.f g7pgn straight toward you. From your point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wires car*bf fltrmidqp8ni2 m t; -u7 2023rmmzry 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 b2 u 0q7r;mb22irmfd-mimn8zt3ft*p l etween the two wires?

  A long straight wire carries current toward the east. A proton moves t kn8jvlb4o2en ;)i,btoward the east alongside and just soutbvo8j); t2,nbil e nk4h of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of tn 4 pzv19vpj 3trkj/m2cwq8x.he page carries a current toward the bottom of the page. What is the direction of the magnetic force it produces on an electron that is movin v kv2q j9c81 z3tr.4mxnp/wpjg 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 horizontal tabwt:wdtj8z( j9-+lcyk le. If the wirw 9kl+ tw( t-8jzdycj:es carry current in the same direction,

  Two long parallel wires are placed side-byui m)d(c ys257gjny,y-side on a horizontal table. If the wires carry current incd jyn7,i2usmy) (5yg opposite directions,

  Consider two current-carrying circular loops. Both are madqqqtn;3 +8l6v aky zaj+m 2/vme from one 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 centl2k;/8vvtzq q6 mnm +j 3aq+yaer of the larger loop is

  Consider two current-carrying circular loops. Both arq-68vkdq7m t7n fi,r ae made from one 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 smaller loop, the magnetic moment of the liqvm-q 8n6t7 rf7, kadarger loop is

  The maximum torque on a current carrying loop occurs when the69kx4r5w/t p rxzlj)m 0; vots angle between the loop's magnetic mso; k/ r54t0mx9 xzpt)jwv l6roment and the magnetic field vector is

  When placed askew in a magneticrm3eiprpyxio)y ti -6:-0k d +vyi3;y field, a current carrying loop that is free to rotate)6y ;im+ iiv3 er-r x-kppyty0:y3d io in any direction will experience a torque until its magnetic moment vector

  What fundamental fact un5.z( p)rcyj;vwdf*pn derlies the operation of essentially all electric motors( ;wn)dcrjpv5z f.yp* ?

  A circular wire loop lies in a horizontal plane on a tablk19,a9.w ;b nc 2,lnaypy pehpe 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 coilpp .k 1y99, yphbw a,le;nnca2 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 acceleracrp6c:4,o x l*yz o6fqted 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 pcp66:,cqx4l* z oof yrerpendicular 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 through crossedni3qa+ ko21+dq*1jd yxmp4 mh 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 1hmd qo2+d im4y+k*x1paqj3n the electric field point?

  A 2.0-m wire carrying*dxi.k k- k-bao:,emp a current of 0.60 A is oriented parallel to a uniform magndm-k,:obe-x p k.kia*etic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a directio 0gw)9;o+z2jiyt(o k ztto q(zn 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 wh8 -xyrp0q6vy1d* bzj ren it is placed in a magnetic field of 0.020 T? x dbq0yvz-r8j61pry*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 isshe ;xo+ue7f36 aa:iojm -z +s 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 weight of ti;m6fze +aeu3oas x-o : 7jsh+he rod?

  A stationary proton is in a uniform fn mk,hq 4li ;ofa2,4pmagnetic field of 0.20 T. What is the magnitude of the magl,n4o ,pa4mf qk ih;2fnetic 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 auwb b32p;upao56.n u a 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 m: w:9awmi3a; alqnwh oinlr-e9g6ff0o3 *p . 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 north with 9 tqfaet1sp4xaf*: p f7m vz-5speed $4.0 \times 10^5 \; m/s$ 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 spybef .vl9)3hkeed 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 a1tmn16r xgc:f 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 eag4:a* j 0 g7,ykllfxof $3.0 \times 10^6 \; m/s$ 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 carri 74g d22n yotjql*/ ki6gew0u5ry +gopes a current of 25 A. What is the magnitude of the yin5o/w 7eru0g2l4t2p+d *jgkqoyg6 magnetic field at a distance of 0.15 m from the wire?

  A high power line carrying 1000 A generates whajzv mnen*w ++l l*8k.xt magnetic field at the ground, 10 m az*jvnelml +8n* +wk. xway?

  How much current must f9wcx8n6 c 9amc bz4yp)hom)l. low 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 current of 5.0 A is tst9vjm.fe b-8cq ;lc7he magnitude of the magnetic field due to the wire equal to9l8fj7q s t;.-cbvecm the strength of the Earth's magnetic field of about $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry cvil87w qp3d9 s-vwu llod 474currents of 10 A in opposite directions. They are separated by 40 cqvllv p 3wuos7 44l dwi-c89d7m. What is the 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 cat2 dw ew 0sg)8qj)v1czrry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betwe1 q8veczdj) 0)2t wswgen the two wires?

  Two long parallel wires carry currents of 20 A and 5.0 A anhx4q -g :z+l0 t/n 4cs6v;fs/rt4vxa/g xeo in opposite directions. The wires are separated by 0.20 m. At what point between the two wires xxe;q4t +:6snv 0gxvfz-rl n/a ctoa 4g/4hs /are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the same dirh m6(kc cgjvh *d scart(9)yw+a,34xsection. They are parallel to the z-axis, and they pass through the corners of a square syd 4cm9hax6srct)vhgck(a j , (w*+3of 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 theyl14he-k0qywezlv 6 4 opposite direction. The wires al y44 khlvwqz0-eey61re separated by 0.30 m. Find the magnetic force per unit length between the two wires.

  What is the magnetic field at the center of a circular loop of wire of radi;n1d s+xw7wobtq f). kus 4.0 cm when )+;sqbwdk owt 1xn7. fa current of 2.0 A flows in the wire?

  A solenoid 20 cm long is wound with 5000 turns of win2uohyga+h0; s g vy+1jp+s/qre. What magnetic field is produced at the center of the solenoidsou1+hg 2hqp0n+y ;s +/jygva when a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries a current mhq078gy)d3rh;t ajbf pae5) of 4.0 A. What strength of magnetic field will it have at its cent0)7fqmat;hbg5yae jp r 3d h8)er?

  How much current must pass through a 400 turn coil 4.0 cm long tanrr+kzq6bw*rh1a4 1o generate a 1.0-T kwaq rrz+b6h anr*141magnetic field at the center?

  How many turns should a 10-cm long solenoid have if i :wx;m3jkmc 2qt 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 rectj 0w4ce-j(p cq/7r jpqs:4og nangular loop of 120 turns that carries 6.0 A if its dimensions are 4.0 c7c:( jreq p-c/jnqwpsgo0j 44 m x 8.0 cm?

  A circular loop of wire oy1e nszg51uh-t4xh3wf 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 perpen3xy5t 11h4gw-ns heuzdicular to the magnetic field?

  A circular loop of wire of cross-sectional aref-jg+imfdj m 1q;lt .d0:nnw2j:o: sea $0.12 \; m^{2}$ 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 magp2*(p + r6d.mrl(npyrsywd , mnetic field of 3.5 T. The loop 2m mrylr(6p yp r,d+ps*n (.wdhas 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 hmyu0 y38 n+tjradius 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 parallel to the magnetic fieldny0h 3m8t+y uj?

  A circular loop of wire of radius 0.50 m /r, h beogkwnr3:oa6dy5buy7g* i 2g,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 parallel 5go3na* kir ,/wge 2yrbhgo67y b,d:u to the magnetic field?

  A circular wire loop of arez( s+0 hbm/uhcs+q6k y4(sveqa $0.25 \; m^{2}$ 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 (charm qvtd 4na,9+jge 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 velocitgg map yb),zcea.5r9 deoj1+.ysk4 8ty $6.9 \times 10^6 \; m/s$ 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 potp4.wk8lnig. u-s gm+kential of 1.0 kV and then moves into a magnetic field of 0.040 Ti kg4.mnp-w8 gluks .+. What is the radius of the proton's resulting orbit?

  A proton is accelerated from rest througp z7xbyw:/n) r5 de*jvh 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of mobz y n)*p5e:rx7/ vdjwtion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a d6 6yadqmntz p +-(e1mnun5f3potential difference of 10 kV before entering a velocity s+p1nf 5aydtmn(-emzn 66u 3qdelector. 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?