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![[Post New]](/templates/default/images/icon_minipost_new.gif) 30 Mar 2007 10:39:34 IST
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an electron is projected in a uniform magnetic induction obliquely. Its motion will be in which direction?(is it along a straight line? or a circle or a helix or a parabola? I need explanation)
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30 Mar 2007 10:43:35 IST
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If an electron is projected obliquely in a magnetic field then its motion will be HELICAL. Explanation: As the particle is projected obliquely, so its velocity v can be resolved into two components. v(parallel) , which is parallel to mognetic field which will be unaltered by magnetic field as F = q v(parallel) X B = 0 Now another component is v(perpendicular) which makes particle to move in a circular path. thus perpendicular component makes particle to move in a circular orbit and parallel component displaces the particel thus the trajectory of particel is effectively the HELICAL.
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The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
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30 Mar 2007 10:49:17 IST
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Cosmic rays from the universe entering into the earth's magnetic field contains charged particles and are coming or entering obliquely into the earth's magnetic field, thus their path is helical.
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The Scientist does not study nature because it is useful; he studies it because he delights in it, & he delights in it because it is beautiful. If nature were not beautiful, it would not be worth knowing, life would not be worth living. Ofcourse I do not here speak of that beauty that strikes the senses, the beauty of qualities & appearances; not that I undervalue such beauty, far from it, but it has nothing to do with science; I mean that profounder beauty which comes from the harmoniuos order of the parts, & which a pure intelligence can grasp. |
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30 Mar 2007 19:35:00 IST
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sir , suppose a particle(charged) moving along the x-axis enters a region which has magnetic field along the negative z - axis . now at t = 0 it enters the region and it starts possesing velocity along y-axis .now i want to know , will there be a time when the resultant wil be only along the y-axis(i.e x-component = 0 ). (i think this won't happen) now, if it doesnt happen , then how why do call its motion helical , because a helix is after all the circle which is translating .but in a circle a point should come when the velocity(resultant) is along the y-axis. plzz. solve this contradiction
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light travels the fastest ??? NO
wherever light goes it always finds that darkness has already got there |
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