If the north poles of two bar magnets are brought close to each other, the ma/shzm 2m(z et)gnets wi/()zhtz ms2em ll

  If the south pole of one bar magnet is brought near the north pole of a second b* i1y7ck)6owpi eysq/ar magnet, the two magne )ys716ikw i cy*o/pqets will

  If a bar magnet is ditsl3rs).l en :g2 uw5dvided into two equal pieces,

  The Earth's geographic North Pole is magneticallc xf,:lc nvi44+1iwp5vc zk q9lllt 7)y a

  The south pole of a magnet points qkr axyo.- xq5qo84:ftoward the Earth's

  An electric current ujyca8;y zvs1+5ro9oz v f32aproduces

  Which of the following is/32x 8wt3z yq6llk6o 9giun dz correct?

  A vertical wire carries a curreb3izm * o: zubf-izoqmw- sag g5)b/4*nt straight down. To the east of this wire, the magnetic sb*ii3bgb-am ) qfgo4 -/*5m z:ouzwz field points

  A horizontal wire carries a curr1;llv vozv *u(ent straight toward you. From your point of view, theul; vov1zv* l( magnetic field caused by this current

  A current carrying loop of wire lies flat on a table top. When vie2)rdc+ d pe bh2a*+l/6ymzn hiwed from above, the current moves around the loop in a counterclockwise sense. What is the direction of the magnetic field 2l+ dbe ad)/*m6yprhci +z2h ncaused by this current, outside the loop? The magnetic field

  A current carrying circular loop of wire lies flatunhz s*d rcy/ x(b6.y, on a table top. When viewed from above, the current movesu,(c*h/ ys z6ynbrx.d around the loop in a counterclockwise sense. What is the direction of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic fie03 lzsdcjx*h5ld is the

  1 T is equivalent toykb3 az1 -1kvj

  The direction of the force on a current-carrying wire in a magne6y+rbaf .y8 cttic field is described by whf.8b6ct+ ryayich of the following?

  The force on a current-carrying wir5kayit3x,w /d5z2uulu0j m- be in a magnetic field is the strongest when

  The force on a current-carrying wire in a magnetic field /qm sv;xmvp+, tvabs0+gx; j5is equal to zero when

  A vertical wire carries a current straight up in a region where the y16a:u bj pi0+gy+/c5n jawnvmagnetic field vector points du +j :yug 1w y+p0vcba6j5ainn/e north. What is the direction of the resulting force on this current?

  A charged particle moves and experiences no magnetic force. F:r g3: x,wug1dgc,qebqr g/.srom this we can conclq:ed,rq3g/ g x1 ru:gsb.wc,gude that

  A charged particle moves with a constant speed through a region where a un )d qsh-xyu1ww2or( c*ib-,wgiform magnetic field is present. If the magnetic field points straight upward, the magnetic force acting on this particle will be mab() *irs udqw,2 c-1ywxow-ghximum when the particle moves

  A charged particle moves across a constant magnetic field. The magnbxvf xp. 7 1onksk7lt4qs36d+etic force onxdq 6po t1k4ns xlf.+ v7kb73s this particle

  A charged particle is injected into a uniformx* gy7mq8(w1 idshqv 8 magnetic field such that its velocity vector is perpendicular to the magnetic field vector. Ignoring the particle's i d*q71 wxmyhsg88qv( weight, the particle will

  A charged particle is observed traveling in a circular path in a uni2ad.m/-zx ijeform magnetic field. If the particle had been traveling twice as fast, the radius of the circular pa/xa .z-jeid2 mth would be

  A particle carrying a charge uuu4qwmh2l4 lql p. evc4ysg q19w6mq ,2ku: (of +e travels in a circular path in a uniform magnetic field. If ins m uqm ,49:c1hl 6.pkel(4y qwuguq2 q24vsulwtead 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 unifo /68 )dsn;kokot hzsp;rm magnetic fie /hptn)o86 dss;z;kokld that is directed straight downward. The magnetic force that acts on it is

  An electron has an initial vxcr18 x;wu v6qelocity to the south but is observed to curve upward as the result of a magnetic field. The direction of thevxq uw 1xc8;6r magnetic field is

  An electron moving along the +x axis enters a3ye.2 ty, ,jma rdj7ik region where there is a uniform magnetic field in th,3 7tidam .e jk2y,yjre +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 straigvwsg- 7;ei3rbht current-carrying wire is

  At double the distance from a long current-carry7un7oq;ad:+pb e1lx nd 5sf8+hv5ges ing wire, the strength of the magne57g+us dadee;85 o71p +lvnf b :xqhnstic field produced by that wire decreases to

  Two long parallel wires placed side-by-side on a horizosp2k:q*kv0dyn48sq-s*nl mxw )7lu ontal 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 fn07k*m: * dn ps8w qvqy 4okxs)2l-slurom 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 ident5.fa x+i wyy):: +xn8u mcppel,aehp7ical current straight toward you. From your point of view, the magnetic field at the point exactly between e u eny+y.x h7lf:ap,:ca5 8xpip+ )wmthe two wires

  Two long parallel wires carry equal currents. Th0. ;ko(c : lqmaf)qxufe 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 t)a f:;cfx.u0lo( q kmqwo wires?

  A long straight wire carries current toward the 1e:k ttxvwo-j gt1*s* y,6 elkeast. A proton moves toward the east alongside and just south of the1ltktwgyx -t e1:6oje ,*ks*v wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page carries a current towar(j90q* ubt edad the bottom of the page. What is the direction of the magneti q*te(budaj09 c 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-side on a horizontal tas8. b5 vqdi0no1jk: sph;iiq5ble. If the wires carry current in the same directp;.jn18qosd b s5 h0 i:vik5iqion,

  Two long parallel wires are plac;l -- xjoh)kzw - tsj4+wtc+7pvfcn/led side-by-side on a horizontal table. If the wires carry current in otxplcfo-w hl4)c t;n- vskw7z-j++j/pposite directions,

  Consider two current-carrying circular loops. Both are made from gciq;6y gq/z)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 cenzgc6 /qq);g iyter of the smaller loop, the magnetic field at the center of the larger loop is

  Consider two current-carrying circular loops. Both are made from one strand ofww0esr 4)yo vxn-lr, . wire and both carry the same current, but one has twice the radius of the other. Compared to the magnetic moment of the smev,)4srn0 - .xlrowy waller loop, the magnetic moment of the larger loop is

  The maximum torque on a curhqwd,/ qx9gk-rent carrying loop occurs when the angle between the loop's magnetic moment and the magnetic field vq9/ dkqh,x-gwector is

  When placed askew in a magnetic field, a curr4ne37f s 5zpduent carrying loop that is free to rotate in any direction will experience a torque until its magnet3d4s57 e pfnuzic moment vector

  What fundamental fact underlies the operation of 2b zgi33kf hj-+bzty4essentially all electric motors4jzb ihtf3 k+3z y2b-g?

  A circular wire loop lies in a hori2f :+b/k;lg9 aqwwkenzontal 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 a:qnk+f ;w92lgkw eb/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 is accelerated thr4bpja +9 pt(vfough a potential difference V and allowed to enter a magnetic field B, where it is deflected in a semi-circularap 4 p+(tb9fvj 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 thr8vk -iz zn8j7aar,6 edough crossed electric and magnetice 8jri8zaznd-k7av ,6 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 carrying5dnn, 3 kxz1a)tqgskaz v97txs, o+0w a current of 0.60 A is oriented parallel to a uniform magnetic field gxsqavz+0x ,s) 5wok 9n,3t71azktdnof
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction ofw x;-l0k0v/ck a qq ,8*hn.vuekf px,u $30^{\circ}$ 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 mete5)jehm 1pgo;bwrh3 -mr on a straight wire carrying 5.0 A when it is placed in a magnh1h5obpm g j)rm- ;e3wetic 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 md(m v fbl6x:k4 long has a mass of 0.050 kg and is in a magnetic field of 0.10 T. What minimum currenf (dmx:bl4v6 kt in the rod is needed in order for the magnetic force to cancel the weight of the rod?

  A stationary proton is in a uniform magnetic-o50h hfq2,b;qgr8o+-ijplhs n t 6n2xj t;w v field of 0.20 T. What is the magnitude of the magnetic force on the pro,qj;b8qji hsto 62lv52wr -0+npon tg-xfh; hton?

  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 speew+bz mx0h(bu .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 hnw 9bz31cg+fe6jd k(zc8( bdspeed 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 travelingoaaxl 6b/o(o14ydt h2w9w 7 lj1 s*vni due north 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 spexrjn.)7zmg t1 f.pz u;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 speed p75:sc0b zu2gxmiqb.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 ojc(wf, oz3zi0 f $3.0 \times 10^6 \; m/s$ 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 the ma.5poq)l ;mj4nv; dvvp7 a ijo.gnitude of the magnetic field at a distance of 0.15 m fp7vnm;pvd. jilj.4v5o) o;a qrom the wire?

  A high power line carnm rd.in/m ay;*eq: 7wus.:hyrying 1000 A generates what magnetic field at the ground, 1r .wnms:/e i:q* ;hdayu.y7mn0 m away?

  How much current must flow fzokb)g5a- 448 pzfhp dg0 lzjfv8(qk; or $1.0 \times 10^{-3} \; T$ 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 theq 1pb x3 /ox3vliem 62l.6leut magnitude of the magnetic fpi6 l/xt23blem 3qe1 6 u.oxvlield due to the 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 ;t2*/;pybslz cty zm( of 10 A in opposite directions. They are separated by 40 cm. What is the magnetic field in the planylsb zpc(*t y;2;/mt ze 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 ij/p ni (p;vg y49niwh,e2gb 8o(m3hcen opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway between the two4 ;j((9n hvg2eenbih ymg 8 w,cip3p/o wires?

  Two long parallel wires carry currents of 20 Abwj+gh uw w 2))gm-;lb and 5.0 A in opposite directions. The wires are separated by 0.20 m. At what point between the two wires are the contributions from the two wj+ wlg2m; u)b)hwgbw -ires the same?

  Four long parallel wires each carry 2.0 A in the same direction. The(mb sxazs -3j.48jqigy 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 pla.sj(bas4qzi3mx jg 8 -ne. What magnetic field does one of the wires experience due to the other wires?

  Two long parallel wires carry currents of v7kwzyr 4yj9+ 5.0 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 wires.k9v+yjrwy z47

  What is the magnetic field at the center of a circular loopui hipdez*dzus1; 6 .r q7(ir/,u xje7 of wire of radius 4.0 cm when a current of 2.0 A flows in the wir6 7 uudpheqs,1x i; zu rezi(.jd*7/ire?

  A solenoid 20 cm long is j9jkx.hl xyi)yh0 b0(wound with 5000 turns of wire. What magnetic field is produced at the center of the solenoid when a current of )xhxljkb9.yjyh (i00 10 A flows?

  A solenoid with 500 turns is 0.10 m long and carries tm ;:hmrb9npm ipb1us. a*k8ou ;d: h5a current of 4.0 A. What strength of magnetic field wip.;8b;:pm1dun9 :tr b5*am u mkoshhill it have at its center?

  How much current must pass through a 400 t8,3tkedi) ;aelgy x 4++tgqheurn coil 4.0 cm long to generate a 1.0 day;i ee4exgtg ++q8,h)3 ktl-T magnetic field at the center?

  How many turns should a 10-cm long solewms*,k mx+e2. n rci7cv afo90noid 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. rctblk5z hkpocb 9:1kuh-.+ ;0 A if its dimensions are 4.0 cm x 8.0 c.hp+u:; 5toc-l9 brb1kh kckzm?

  A circular loop of wire of radius 0.50 m is in a uniform magnetic field of 0.308kvgwwp + ox8j2-u*ac T. The current in the loop is 2.0 A. What is the magnetic torque when the plane of the kx2 guv88+*oajc pww- loop is perpendicular to the magnetic field?

  A circular loop of wire zt(,.*w0ii1rz wvdj*xg (jotof cross-sectional 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 cg.:bpqm br e.r*5*c :n)zoll lmy t-;gurrent of 2.0 A is in a magnetic field of 3.5 T. The loop has an areamml p*glgln y.q : ez)*tbrr-.c;o5:b 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 mau wdhc7+5 dg*4syza;r+u8 jybgnetic field of 0.30 T. The current in the loop is 2.0 A. What is t cu;y +w+ g54ddbzyaj7 8rh*ushe magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular loop of wire of radius 0.8 ara3ta(*evs 50 m is in a uniform magnetic field of 0.30 T. The current in at8 e(3 aav*srthe loop is 2.0 A. What is the magnetic torque when the plane of the loop is parallel to the magnetic field?

  A circular wire loop omswu 2,e ata83 aa: (tk8l1c)wlu-kkof 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) hp3.t .l+qeiua/t1bsb, vd t )vas 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 velocity f(tuap81 ;ye n$6.9 \times 10^6 \; m/s$ 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 then moves ic2 8wn;svv4m -yvs5 vinto a magnetic field of 0.040 T. What is the radius of the proton's resulting orv-mv4 ycv;vss5 28nwibit?

  A proton is accelerated from rest through 500 V. It enterzmz )/iz g27zus a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determine the radius of the )zg/z iz um72zpath it follows.

  A beam of electrons is accelertd/ n ks1,wn9hated through 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 the E-field is required if the particles are to be tw9nh,k/d n1sundeflected?