If the north poles of ro v1xdn3ub, l cue*2 qh0a*r-two bar magnets are brought close to each other, the magnets wioer r0x1*vn qud, ba3u2cl *h-ll

  If the south pole of one bar magnet is brought near the north pole of p xe23wzbs 12ra second bar magnet, thew23es2bzxr p1 two magnets will

  If a bar magnet is dw24;x6oosf jf 7bs7kmivided into two equal pieces,

  The Earth's geographic North P7oa6lq+e q5tp ole is magnetically a

  The south pole of a magnet points toward the Ea hpus.4 xq+h-frth's

  An electric current producesivb(.kl) 4 sjti mc)6v

  Which of the following is coa-7nqp3c 4bro rrect?

  A vertical wire carries 6;mrd vfkj( hda, 4ba.r/xk3py*aj*g-i zm p. a current straight down. To the east of this wire, the magrzamd xaf (gaj.p yi hvrp*d/, -jkbm6k;*.3 4netic field points

  A horizontal wire carri80e(kp)8xevfl o3p yq: p+o1e qlrvc 9es a current straight toward you. From your point of view, theep0reopv(kll)f8xqecyo+ 8p: 1 q 9v3 magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. Whenajd49os:gxx 9b4hn r1 viewed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this currenthxsrd9b 194axj o4:gn, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flxy 6kar/m-l x)at on a table top. When viewed from above, the current moves around the loop in a counterclockwise se6xr l x/)k-yamnse. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic b:/r:d h0+ g2zvvjfnqfield is the

  1 T is equivalent toc txg88 me;wv+

  The direction of the force on a current-carrying wire( w7vd9 o4imdkqkbhuj*q p,)2 in a magnetic field is descriw4buq h* po,9()2dkkmj7id qvbed by which of the following?

  The force on a curreqk,l fv,/kib9nt-carrying wire in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnt dak7o*rjos4w ej31 )etic field is equal to zero when

  A vertical wire carries a current straight up in a region where the magqa gz,9vyc;*unetic field vector points due north. What is the direction of thq,gca9uvz ; y*e resulting force on this current?

  A charged particle moves and experiences no magneti f-e0x3rlj7 a+wc6e uvc force. From this we can conclude thau r 6cv7l fee-x+w0aj3t

  A charged particle moves with a constant speed through a region where a .ff3 (te o(m d9aatczb4j,2jd uniform magneticat.,d(jtm za 9d3c(2e ob j4ff field is present. 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 field8 jq 2iwah wjo6 0rz51+igq0qlx ug85m. The magnetic force on this pau jwq+z qr0xaggih 1omj 06iw52l8 q85rticle

  A charged particle is injected into a uniform magnetpd.g e31-7+ dqj .o w+ticvvhyic field such that its velocity vector is pe dp7 g1+ty- +djvqc3 wv.ei.ohrpendicular 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 magnet 6 4*ril-4cmg *dkixgnic field. If the particle had been traveling twice as fast, the radius o d*6cx 4mki*in-g4grlf the circular path would be

  A particle carrying a charge of +e travels in sa 5:eumh 8.zea circular path in a uniform magnetic field. If instead the partic ma5.eu:se8zh le carried a charge of +2e, the radius of the circular path would have been

  At a particular instantr tpu:07n 39ioytm u-f, an electron moves eastward at speed V in a uniform magnetic field that i mu0-p7f3:t rn9o ytuis directed straight downward. The magnetic force that acts on it is

  An electron has an initial velocity to the south but is rzazxp60 :*mq observed to curve upwardz*0a:zrm 6q xp as the result of a magnetic field. The direction of the magnetic field is

  An electron moving along q l dx2.0it/s3 epxgx/the +x axis enters a region where there is a uniform magnetic fielxtd0e3/s/ xpx. g2ilq d in 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 straight curren,1o( j,s7s- wafjek tb0ic 9wvt-carrying wire is

  At double the distance from a long current-carrying wire,4.) vnv kvp 6rjw -53x gnwhdbim*(:yb the strength of the magnetiipvbn4r(5kxbd whj6 m3yv.- :wvng) *c field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a h xk3q,hfw:ki4*)vi uet8:dg uorizontal 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 point exactly midway betwe* dwv3fx g8,:4uq k:kheiiut )en the two wires

  Two long parallel wirencc4/k8am.gn h 1ghk9 s placed side-by-side on a horizontal table carry identical current straight toward you. From a ck9m4cg h.8nn1/ kghyour point of view, the magnetic field at the point exactly between the two wires

  Two long parallel wi +34nh(7yrut rz1zasvres carry equal currents. The magnitude of the force between the wires is F. The 3 z r(th7aus1+rynzv4current in each wire is now doubled. What is the magnitude of the new force between the two wires?

  A long straight wire carries curren:*1mxe4lkd1b.bqhvg1 tv n :ot toward the east. A proton moves toward the east alongside and just south of the wire. What is the direction of the force hbxqt1 g. *vodbk v:41e1m nl:on the proton?

  A wire lying in the plane of the page carries a current toward the,7hlns ,0xtivd6 28w+ jc ywuw bottom of the page. What is the direction of the magnetic force it produces on an electron that is moving perpendicularly toward the wire,v s76hj+uyi,dclxw82n0 ,w wt also in the plane of the page, from your right?

  Two long parallel wires are placed side-by-side on a h ;,lb g- )z1jgy.gd+mcb xld *r;oao,forizontal table. If the wlgog.,;1d;)+ dcz g* mxy,bfoj lbar-ires carry current in the same direction,

  Two long parallel wires are placed side-bgr xj;) t4.nm9z7brsyy-side on a horizontal table. If the wirm ;r.brz n4 gt7xyjs9)es carry current in opposite directions,

  Consider two current-carrying circular loops. Both are made from one strand zq. )v:i cyc+i ylx0z8of wire and both carry the same current, but i8 ic.zq+)xyy0 :vlcz 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 of the larger loop is

  Consider two current-carrying circular lobhn m xb)7euhh 897y+z;ut+ uvops. Both are 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, themy 7b);+nh x +uu 79zb8hthvue magnetic moment of the larger loop is

  The maximum torque on a current carrying loop occurs when the angle betwep gjbl(9 b6/sk8s c1acen the loop's magnetic moment and the magng( ca6 cpss1 9kjlb8b/etic field vector is

  When placed askew in a magnetic field, a current carrying loop that is free to vg, 5jhxn8-a3x w,wve rotate in any directioj-a n v wex,gx8,3vh5wn will experience a torque until its magnetic moment vector

  What fundamental fact1rfh 56wudvd ( puw h0s1p4hl4np4 a)l underlies the operation of essentially all electric motors? rhp ps h4h11l4p6udw(fv0u )5d4lwna

  A circular wire loop lies in a horizontal plane on a t fe*zagjmy0*(cwvx38 able 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 off of the table because of the torque cau cz8 eg*xf*wa0 vjy(m3sed by the currents interaction with the magnetic field?

  In a mass spectrometer a particle of mass m and charge q is acceleruke-bfluio p4j6n fk69v/;y8ated through vbpkiuu kl 8f 9e4of6j6-;/ nya 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 mass of the particle in terms of B, q, V, and R.

  A velocity selector consists of a chargc ddxid4gxac0.3t 8 0js:q vgwns 4:f1ed 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 fd14jiwct v fdx0 d8c ns.a :qgx0:sg43ield is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current of 0.60 A is orientedba v ,mv)vd3: b3vn4oa parallel to a uniform magneabb ) vmon:dv4 a,3v3vtic field of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A qdu/ e p b1tgg 9-1.pykj*o*dlin 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 catv-mc br1o a-tqfu6)/rrying 5.0 A when it is placed in a magnetic field of 0.020 T? The wi6/vam1o- ttf ru)-q cbre makes an angle of $27^{\circ}$ with respect to the magnetic field lines.

  A thin copper rod 1.0 m long hasl,k;dtf mocf8kz, au3r: *3 es 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 cancel;f3 rtko8z m ds:,f3c uka*,el the weight of the rod?

  A stationary proton i rfw/nu5wve-8 s in a uniform magnetic field of 0.20 T. What is the magnitude of the magnetic force on the protorw 5vwu8n -f/en?

  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 speea oc ft3bdp3sp/13dm;d 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 odw nkxm9 8cd78,w+ii $5.0 \times 10^7 \; m/s$ 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 speec5 j fec4rh/ snx+00jqd $4.0 \times 10^5 \; m/s$ 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 speeg(;qiu (fccl4d 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 witpz8 go1c8n.cs xn p-g3h 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 ofnt5kb6 1-el vs2jdm;b $3.0 \times 10^6 \; m/s$ 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 A. What is theu(kab0m9dn6h 81h1:we ab n jg magnitude of the magnetic field at a distance of9k6j1 mha wn8:bue 0n 1ahbg(d 0.15 m from the wire?

  A high power line carrying 1000 A generates what magnetic field at0wk. ,rvpewd ,h(snb 8 the ground, 10 m awaykpbn wdv serh.,w80,(?

  How much current must flow fbl7 ) . 6fcl(c0jctcmxor $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carreb7oqf.i- 8n uqw :9gtying a current of 5.0 A is the magnitude of the magnetic field due to t7qonbq g.9: iuet8-w fhe wire equal 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 woe 5pvtj(3 -fw m;vfqg hw4.4opposite directions. They are se;pq5-3w4 jf.ow(hv tme gvf 4wparated by 40 cm. 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 carry currents of 20 A m.c.0o0q/gritys9j hy 5 qbr/and 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betwe c9qyo0b .q/ystigm.rr 0jh 5/en the two wires?

  Two long parallel wires cay or ,8xsw :1zqc5xnb0(pxr6 lrry currents of 20 A and 5.0 A in opposite directions. The wires are separated by 0.20 m. At wha(z,c80 5qn rx6s:pwxryb1 loxt point between the two wires are the contributions from the two wires the same?

  Four long parallel wires each carry 2.0 A in the safi6 )iuaorerc3 5l6apovko0e o m48;( me direction. They are parallel to the z-axis, and they pass through the corners of a square of side 4.ocov36ufra(k iori5p o) el06a 84 m;e0 cm positioned in the x-y plane. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wi* d n+jv mrlgvb;/sk2,res carry currents of 5.0 A and 8.0 A in the opposite direction. The wires are separated by 0.30 m. Fbr*+nm v,j v sldkg/2;ind the magnetic force per unit length between the two wires.

  What is the magnetic field at the cente n) f1plq xv(nin9p6;xr of a circular loop of wire of radius 4.0 cm when n1 lfi)(nxp p9x q;nv6a current of 2.0 A flows in the wire?

  A solenoid 20 cm long isf2u s f7k* 4a5q;siqm6 -fuqo0b4rrqe*;glpo wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of 10 A floq2ef0orup k; qsf 6*7m;lqbr*-45 4soaui qf gws?

  A solenoid with 500 turns is 0.10 m long and carries a current of 4. b .5*tzpffrri 7b-3u. j9ghyh0 A. What strength of magnetic field y 5z9ru .3.gj*ifhfp b7-bthrwill it have at its center?

  How much current must pass through ac9ry2 l,an b/ /sodzi1 400 turn coil 4.0 cm long to generate a 1.0-T magnetic field at b y , i9c/anls1r/2ozdthe center?

  How many turns should a 10-cm lonb-+tw vvji92 vg 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 rectangular loop of 120 turqdj/x -lx8pj1ns that carries 6.0 A /xjdp 1lx-8qjif its dimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radius 0.50k3+9hlia: u xn 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 perpendicular to the magneticl xhua: 3n+9ki field?

  A circular loop of wire of cross-sectional ar6(kd:a2w nhgg4z3n woea $0.12 \; m^{2}$ 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 a7gq;8xmi8 wb x current of 2.0 A is in a magnetic field of 3.5 T. The loop ;i8qmgw78xxb 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 wire of radius 0.50 m is in a uniform magnetic field o+:;.u28uypc*xfrr k f xp0 pycf 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the loop i8x2pyf * u:;x0 + .fprkrycucps parallel to the magnetic field?

  A circular loop of wire of radius 0.50 m is it* +(8slymww zn a uniform magnetic field of 0.30 T. The current in the loop is 2.0 A. Wm (ztw+8sy lw*hat is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop ole. 6z(:thz(dp*yg 7 e3yxhlgf 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 e) has a spee/se 1sg3.)uq hgugi*b )(xn wnd 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 6cg)r2dsjf9 j s73nr evelocity $6.9 \times 10^6 \; m/s$ 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 jpn)d+tx/mir-.r8gkq;y c t)then moves into a magnetic field of 0.040 T. What is the radius of the proton's resulcg8j i+xy t- )) p;rqtrkdnm/.ting orbit?

  A proton is accelerated from rest through 5btl20yqea(b 8 00 V. It enters a magnetic field of 0.30 T oriented perpendicular to i8b( be yl2a0qtts direction of motion. Determine the radius of the path it follows.

  A beam of electrons is accelerated through a pot:-hfxj lye-inbv5qjh,j27qps83 e8 pential 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 3 -jhen8qplpfj:v xyi85, -sb 27jq ehvalue of the E-field is required if the particles are to be undeflected?