FIITJEE New Delhi..! (Edited)
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chk dis -- http://www.goiit.com/posts/list/community-shelf-the-jee-guide-72019.htm
When two magnetic fields act at a same place, at a particular point the compass needle does not point in any particular direction and there is no net magnetic field at the point. Such a point is called Neutral point or the Null point.
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An electron of mass m and charge e initially at rest gets accelerated by a constant electric field E. The rate of change of de_broglie wavelength of this electron at time t ignoring relativistic effects is..??
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The activation energy of a reaction whose rate constt. is trippled by 10 degree C rise in temp. in the vicinity of 22 degree C is
a) 82.18 J/mol
b) 82.18KK|J/mol
c) 65.9 kJ/mol
d) 30 kJ/mol