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Q. (a) A giant refracting telescope at an observatory has an objective lens of focal length 15m. If an eyepiece of focal length 1.0 cm is used, what is the angular magnification o
A football player kicks a field goal from a distance of 45 m from the goalpost. The football is launched at a 35° angle above the horizontal. What initial velocity is neede
An a.c. voltage E = E 0 sin cot is applied across an inductor L. Get an expression for current I. Draw a labelled diagram of Van de Graff generator. Verify its principle of wor
A current of 12A flows in the element of an electric fire of resistance 25?. Verify the power dissipated by the element. If the ?re is on for 5 hours every day, measure for a
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Con you describe harmonics? How are stationary waves formed in a closed pipe? Illustrate the various modes of vibrations in a closed pipe and establish the relation between their f
It is a method of depositing a thin layer of one metal over one more metal by the method of electrolysis. The articles of cheap solids are coated with valuable metals like silver a
A 9.0-kg crate sits on a level, rough floor. A 61-N force is required just to begin it moving. What is the size of the coefficient of maximum static friction?
Q. Two slits 0.3 mm separately are illuminated by light of wavelength 4500 0A. The screen is placed at a distance 1m from the slits. Find the separation among the second bright fri
The central part (photosphere) of the sun is very hot and all possible wavelengths of the visible light. Though, the outer part (chromospheres) having of vapours of dissimilar com
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