From Physics

Suppose the potential energy between electron and proton at a distance r is given by  - \frac{{k{e^2}}}{{3{r^3}}}. Use Bohr's theory to obtain energy levels of such a hypothetical atom.

From Math

A quadratic equation f\left( x \right) = a{x^2} + bx + c = 0\quad \left( {a \ne 0} \right) has positive distinct roots reciprocal of each other. Which one of the following is correct
(a) f'\left( 1 \right) = 0
(b) a f'\left( 1 \right) < 0
(c) a f'\left( 1 \right) > 0
(d) nothing can be said about f'\left( 1 \right)

From Chemistry

1.44 g of pure FeC2O4 was dissolved in dilute HCl and solution diluted to 100 mL. Find the volume of 0.01 M KMnO4 required to oxidise FeC2O4 solution completely


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    This training module covers a wide spectrum of disciplines in Modern Physics, and is based on the GATE examination requirements. Approximately 1000 questions are added to conform the syllabi. The questions are arranged under ten topics. Brief concepts with required mathematical formulae. A detailed answer for all questions are available.
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