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A giant refracting telescope at an obser...

A giant refracting telescope at an observatory has an objective lens of focal length 15 m . If an eyepiece of focal length 1.0 cm is used, what is angular magnification of the telescope ?

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To find the angular magnification of a giant refracting telescope, we can use the formula: \[ M = \frac{f_o}{f_e} \] where: - \( M \) is the angular magnification, ...
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XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-SET-I
  1. (a) Using de Broglie's hypothesis, explain with the help of a suitable...

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  2. A compound microscope uses an objective lens of focal length 4 cm and ...

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  3. A giant refracting telescope at an observatory has an objective lens o...

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  4. A resistor R(1) consumes electrical power P(1) when connected to an e...

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  5. Prove that an ideal capacitor in an a.c. circuit does not dissipate po...

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  6. (a)Using Ampere's circuital law, obtain the expression for the magneti...

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  7. State the working of a.c. generator with the help of a labelled diagra...

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  8. (a) Show that an a.c. circuit containing a pure inductor, the voltage ...

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  9. Two charges of magnitude -2Q and +Q are located at points (a,0) and (...

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  10. How is mutual inductance of a pair of coils affected when (i) separati...

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  11. Two identical cells each of emf epsilon, having negligible internal re...

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  12. The motion of copper plate is damped when it is allowed to oscillate b...

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  13. Define the activity of a radionuclide. Write its SI unit. Give a plot ...

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  14. Welders wear special goggles or face masks with glass windows to potec...

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  15. Write the expression for the de-Broglie wavelength associated with a c...

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  16. Draw typical output characteristics of an n-p-n transistor in CE confi...

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  17. A parallel beam of light of wavelength 500 nm falls on a narrow slit ...

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  18. A slab of materail of dielectric constant K has the same area as the p...

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  19. A capacitor, made of two parallel plates each of plate area A and sepa...

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  20. Explain the term 'drift velocity' of electrons in a conductor. Hence o...

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