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Himalayan Serow

Himalayan Serow – a Himalayan mammal, somewhere between a goat and an antelope, has been confirmed as the newest creature... View Article

Gandhian Ideology

Gandhian ideology (also known as Gandhism) is the set of religious and social ideas adopted and developed by India’s Father... View Article

The angular width of the central maximum in a single slit diffraction pattern is 600. The width ofthe slit is 1μm. The slit is illuminated by monochromatic plane waves. If another slit of same width is made near it, Young’s fringes can be observed on a screen placed at a distance 50 cm from the slits. If the observed fringe width is 1 cm, what is slit separation distance? (i.e., distance between the cenrtres of each slit.)

a. 75 μm b. 100 μm c. 25 μm d. 50 μm Answer: (c) 2α = 600 a=1 μm D... View Article

Seven identical circular planar disks, each of mass M and radius R are welded symmetrically as shown. The moment of inertia of the arrangement about the axis normal to the plane and passing through the point P is:

a. \(\begin{array}{l}\frac{73}{2}MR^{2}\end{array} \) b. \(\begin{array}{l}\frac{181}{2}MR^{2}\end{array} \) c. \(\begin{array}{l}\frac{19}{2}MR^{2}\end{array} \) d. \(\begin{array}{l}\frac{55}{2}MR^{2}\end{array} \) Answer: (b) M.I. about origin \(\begin{array}{l}I_{0}=\frac{MR^{2}}{2}+6\left [ \frac{MR^{2}}{2}... View Article