If the north poles of two bar magnets arslygit v , +p/f-r 5iuyw4mr18e brought close to each other, the magnets w 18 t,v r5irisp+yuylg4m-wf/ill

  If the south pole of one bar magnet is brougfx)l2u3l/ idn1o t p/z5 c+ emkrtye;*ht near the north pole of a second bar magnet, the 5c 2o/flyl x;dr)1 3ktipe+nemu/t* z two magnets will

  If a bar magnet is divided we923wyqzo2v. v g -esinto two equal pieces,

  The Earth's geographic Northeeg*3cepmnm*a , u )-i )jwyg. Pole is magnetically a

  The south pole of a magnet points toward the o .)ms;i4 p: hqhz+g;hc;u,eiwf ,zv oEarth's

  An electric current produces/xrsy+ ym/w4 wjswm **

  Which of the followingde1+lji 94skup*m d w0 is correct?

  A vertical wire carries a current straigh* ifcntbk: zkf3))a,nt down. To the east of this wire, the magnetic fielk fn)a)cfz*,k:i3tnbd points

  A horizontal wire carries a current straight toware6l: lakf v5)md you. From your point of view, the magnetic fielfmka6: ve) l5ld caused by this current

  A current carrying loop oqq:n 5uldmi- )f wire lies flat on a table top. When viewed from above, the current moves around the loop in a counterclq) n-u5:l qimdockwise 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 top. When vieweq/c( oics-/o1a +dyjpd from above, the current moves around the loop in a counterclockwise sense. What is the directio(1id+qa-/op o/jcs yc n of the magnetic field caused by this current, inside the loop? The magnetic field

  The SI unit of magnetic field-i +po5d szyg3u72v cy is the

  1 T is equivalent tov8jsr , y7czqmy5akz-.7z 6id

  The direction of the force on a currei)a3s;d3:p +k 9rjmdhdyc 6ment-carrying wire in a magnetic field is described by which of tjsda6 d kie: )cmr93pm 3y+hd;he following?

  The force on a current-carrying wire in a magnetic field is the strongest wl1f 9 37zyuigbhen

  The force on a current-carrying wire in a magnetic fiel+keic)x ;vd1o 1n bw qqq3gh.:d is equal to zero when

  A vertical wire carries a current 2gv(3sfxk 9c9v *v cmxstraight up in a region where the magnetic field vector points due norcvmfsg 2(93 xvc9k*xvth. What is the direction of the resulting force on this current?

  A charged particle moves and exper7;6ua c eyp2re4.aw iiiences no magnetic force. From this we can conclude a2pa . w6; u4e7yreiicthat

  A charged particle moves with a constant speed through a region where a uniform 7h(tfoy 6 (b)van+yb/ x3 jddimagnetic field is present. If the magnetic field points7b(3afj(int oy /hvx+dd6)yb straight upward, the magnetic force acting on this particle will be maximum when the particle moves

  A charged particle moves across a constantjcd jbgm:; j5 1md y7w4kz+2ds magnetic field. The magnetic force on thi2d7mdjkg+4w sjy mzb5j1d;:c s particle

  A charged particle is injected into a uniform magnetic field scbmo: t-2xp( wuch that its velocity vector is perpendicular to the magnetic field vector. Ignoring thxcbmp (-:2otw e particle's weight, the particle will

  A charged particle is observed traveling in a circular path in a 85 (ypztqqf)7s*ox x-5hwy ca95jabk uniform magnetic field. If the parxh7scxpyza q a*-q k8of5b(95 5wjyt) ticle had been traveling twice as fast, the radius of the circular path would be

  A particle carrying a charge of +e travels in ai d5vp pe; r*mzb89l:f ay0a)n circular path in a uniform magnetic field. If instead the particle carrie0 deiarlzf)pb 9* ampv 5y;:n8d a charge of +2e, the radius of the circular path would have been

  At a particular instant, an electron mn7g g4kow3 iw1nl8v2q5rv .pv oves eastward at speed V in a uniform magnetic field that is directed straight downward. The magnetic for g oviw3gvpkvqlw .5nr8n2174ce that acts on it is

  An electron has an ini;,dik .wvd/gffjwhl .w4yn 70 kdp w5ti) 5:rbtial velocity to the south but is observed to curve upward as the result of a magnetic field. Thel754yk5i .h)dwp;d/ tngdw.b kw,0w ifrv: fj direction of the magnetic field is

  An electron moving askx r3k4.ild -p+ 4advdo9mm qink7 15long the +x axis enters a region where there is a uniform magnetic field in the +y direction. What is the direction of the magnetic force on the ele omivkkx3 n9+s 75-a4drlm.kd41ipdq ctron? (+x to right, +y up, and +z out of the page.)

  The magnetic field produced by afitya4 2s/chmn-7p 7t long straight current-carrying wire is

  At double the distance from a long cur/ll; ivm/0gjwrent-carrying wire, the strength of the magnetic field produced by that wire decreasew;0glv j/im /ls to

  Two long parallel wires placed side-by-side on a horizontal tamdwz9x 0o:cgwjkdy x2 *t 96)cble carry identical size currents in opposite directions. The wire on your right carries current toward you, a y )j 2wck90*mg x96tdw:cxdzond 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 wirese//1v q)zlmkf9i3 tov placed side-by-side on a horizontal table carry identical current straight toward you. From your point of vo)fv1l/i3 kvz mq t/9eiew, the magnetic field at the point exactly between the two wires

  Two long parallel wires carry equal currents. Thenr-y fae;ypm.: ha56gy-,r, jcy a6gj0d*epb magnitude of the force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new j; eaae5jgyr0 dyn r,*y-h-c6,p.p 6fb m:agyforce between the two wires?

  A long straight wire carries current toward the east. A protee:im ) br8u/qx,f)l ion moves toward the east alongside and jee8b ml,uixr/ :i f)q)ust south of the wire. What is the direction of the force on the proton?

  A wire lying in the plane of the page l:m7g039 -wo7 hsfgmkbe pag6carries a current toward the bottom of the page. What is the direction of the magn7p:gsm7glbm 0ok3h faeg- w 69etic 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 horizontx 85*8k3nj +6ircs0 gbpsr kvcvd q(*sal table. If the wires carrv kni5s+ r*83xg *v8dcc rsj(k6p0bsqy current in the same direction,

  Two long parallel wires are placed side-by-side onna ,v77j)wqhrackmm0 8 xj6 c+ a horizontal table. If the wires carry current in op7+vwm ck7arxncm6h q8)aj j,0posite directions,

  Consider two current-carrying circular loops. Both are made from one sq 6)4k(ubquui8o1ch strand of wire and both carry the same(u qc18hqsu)kb 64o ui 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 of the larger loop is

  Consider two current-carrying circular loops. Both are made fromztc1 i w tncee);1.o 3n4rnkz: 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 z1nccn;. )z4ir1w 3 :tkoneetmagnetic moment of the larger loop is

  The maximum torque on a current1lnrx 8x (53ege :qj m7ezxbqnwr;.m, carrying loop occurs when the angle between the loop's magnetic moment a3qw .(:eg5j xmzq1xn,8enrxlr;me7b nd the magnetic field vector is

  When placed askew in a magnetic field, a current carrying loop d/t/9 iwcp;nw that is free to rotate in any direction will experience a pidwwc n/;t9/ torque until its magnetic moment vector

  What fundamental fact underlies the operation of essentially all electhu68whkd pwkjv(3 x72ric motorsux68k3vw 7wp dh(khj2?

  A circular wire loop lies in a horizontal tcizv7408 l0d+la acp ovgle6t7:9m85ocng k 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 off of the table because of the torque caused by the currents interaction with tc6e go4 clt07 n7k 8:pal 8adoi9lv+zt0gv5cmhe magnetic field?

  In a mass spectrometer a particle of mass yq43k(eg.d gc m and charge q is accelerated 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 perpendicular to the velocity of the particle. Derive an expression for the m y3egk.c4dgq (ass of the particle in terms of B, q, V, and R.

  A velocity selector consists of gb/re x) xx0pq(yi1e7a charged 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 magne e(7i)xr0qx bp/e1xygtic field is directed to the north. What direction should the electric field point?

  A 2.0-m wire carrying a current ofodd gtg888h*z 0.60 A is oriented parallel to a uniform magnetic fielh 8oz88dgtg* dd of
0.50 T. What is the magnitude of the force it experiences?

  A wire carries a current of 10 A in a direction 1uc8gmbu +r 1bof $30^{\circ}$ 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 perz j5tqz,i+. wl meter on a straight wire carrying 5.0 A when it is placed in a,j+q.zi wzlt5 magnetic 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 4) iqdqf,o d)sl2mx 4am long has 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 the weight of the rqi)44l2,sq)x df dmaood?

  A stationary proton is in a uniform magnetic field of 0.20 T. What)yd8) +5 xkhbw-ckjem is the magnitude)-x8bmyj) hkde 5ckw+ 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 speed o;qy)esipg lri **v*w)f $5.0 \times 10^4 \; m/s$ 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 he g2q, hclknzn:84z; pua1varu(x7 )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 spjev9 d01brg (oeed $4.0 \times 10^5 \; m/s$ 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 k-9(h9y/ltb izjlfvq c6pc :6a 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 wit2xmayxkixxd75lb)k(gx,i(om 2 2 1 oyh 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 of1mdt5.cb.uuf)8cvyh z2- w kz $3.0 \times 10^6 \; m/s$ 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 y whe-z8( -/f ffo 3wx0tui+ rzm5ehj;of 25 A. What is the magnitude of the magnetic field at a distance ofxe5wm -ohf (ezifjt-f 08 yrw;+uzh/3 0.15 m from the wire?

  A high power line caru)-us k(j11.y.c/yfj)mqvd hu0go bkrying 1000 A generates what magnetic field at the ground, 10 m awaj)1q d-)/0u.ujkcksby.fovhu g m(1 yy?

  How much current must flow for htbm/1kd (2(relw c8r $1.0 \times 10^{-3} \; T$ of magnetic field to be present 1.0 cm from a wire?

  At what distance from a long straight wire carryinf-a9e 5s44 xhn )zfyetg a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about fhsxnt-ye)44a efz95 $5.0 \times 10^{-5} \; T$?

  Two long parallel wires carry currents of 10 A in opposite directionsl.4np 2 enh :qvb2y: (xa)iwht. They are separated by 40 cm. What is the magnetic field in the plane of the yw)i l: hvbt( 2napqnxh4: e2.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 anw5k9gk b z1.* aty6 u:in.oktsd 5.0 A in opposite directions. The wires are separated by 0.20 m. What is the magnetic field midway betweekw6 ku. to9gyb*k1 s5 .nzit:an the two wires?

  Two long parallel wires carry curp9t9;wxol wvd*v*- : mm4p acnrents of 20 A 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 fr9 m *wlp*w -4;o vvtx9mpadc:nom the two wires the same?

  Four long parallel wires each carry 2.0 A in the same direction. Th g5hs0:f: veqrtrj+5ij m,x1 nwwb/z 2ey are parallel to the z-axis, and they pass through the corners of a square of side 4.0 cm positionedjwvn x gew+mqsj1rz:2 b5f ,:h /tir50 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 thst. gqq g81iv o5qz9p-jxz1:qd/sl b8e opposite direction. The wires are separated by 0.30 m. Find the magnetis 1tb/jq vod9 15gzpilx-z:8.gqs8qqc force per unit length between the two wires.

  What is the magnetic field at the */+jw z/5h xz*q6*ltwyiee za center of a circular loop of wire of radius 4.0 cm when a current of 2.0 A flj*h 5*wzaet/ezz6 wi/ xq* y+lows in the wire?

  A solenoid 20 cm long is wound with 5000 turn5mxy:6u pkmz8,rb 1yu s of wire. What magnetic field is produced at the center of the solenoid ux:m8yy5z,mk r61bp uwhen a current of 10 A flows?

  A solenoid with 500 turns is 0.10 m long and cb/iau/a..ie c arries a current of 4.0 A. What strength of magnetic field will it have at its center?. /.iaabi ce/u

  How much current must pass through w8y a+1;)9sffq ozex ka 400 turn coil 4.0 cm long to generate a 1.0-T makxfeo1w z9ay+q8s ;f)gnetic field at the center?

  How many turns should a 10-cm long solenoid have if it is to gener )36 kts*wvfqsate 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 *l 3.3g/gjo nep7jujo i3s7e n eb3z/ucarries 6.0 A if its g3*oz7enojsi3n /j73 u/eegbp .j 3uldimensions are 4.0 cm x 8.0 cm?

  A circular loop of wire of radikxi. pcj6 .5+jp( bmw 0j7kjx jcmyj53us 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 thex . 6pkm(55 7+jxb 3ijj0.p kjmjwccyj loop is perpendicular to the magnetic field?

  A circular loop of wire ofjhqzi3 3z j)2a 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 current of 2.0 A is in a magnetic f/9sm nx3xp: jrield of 3.5 T. The loop has an/xrsp j3x:mn 9 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 magneti9mfbgxx toq94c.;xf a1qrn+) c 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 parallegx;fr9 o9n)+xxf mb q .4tc1aql to the magnetic field?

  A circular loop of wire of radius 0.50 m is in a uniform ma+bt xf( --dm30ymlpmgxq1a;ggnetic field of 0.30 T. The current in the loop is 2.0 A. What is the magnetic torque when the planeabx3-gfmm-y+dl tx; (0 q mg1p of the loop is parallel to the magnetic field?

  A circular wire loop of 9v.ew vkh2knd, ib j u/h8k2i9area $0.25 \; m^{2}$ 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 particlevl:4jkp0qkjn tr34o n ))y*be (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 with v:*-1ng(c6l(xaql)omv+s rsu4sn v hielocity $6.9 \times 10^6 \; m/s$ 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 potentiay. 0qoc.q hc5at5rt)n l of 1.0 kV and then moves into a magnetic field of 0.040 T. What is th5qc o.5t.q)tynar0c he radius of the proton's resulting orbit?

  A proton is accelerated fron8 ly co.5l.lpm rest through 500 V. It enters a magnetic field of 0.30 T oriented perpendicular to its direction of motion. Determ.y58lnp.l lc oine the radius of the path it follows.

  A beam of electrons isbvzipkt .i8w jtlfv2 kw*:-(+ accelerated 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 Epfv.lz(k2: w t v-8j wbi*ikt+-field is required if the particles are to be undeflected?