NAT II Physical Science Physics With Answers

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NAT II Physical Science Physics

Sr. # Questions Answers Choice
1 At constant volume temperature is increased. Then Collision on walls will be less Number of collisions per unit time will increase Collisions will be in straight lines Collisions will not change
2 The number of translation degrees of freedom for a diatomic gas is 2 3 5 6
3 All of the following statements are correct except The total focal length of astronomical telescope is the sum of the focal lengths of its two lenses The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent The magnification of an astronomical telescope can increases by decreasing the focal length of the eyepiece The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye piece
4 The length of a telescope is 36 cm. The focal lengths of its lenses can be 30 cm, 6 cm -30 cm, -6 cm 30 cm, -6cm -30cm, 6cm
5 To increase the magnification of a telescope The objective lens should be of large focal length and eyepiece should be of short focal length The objective and eyepiece both should be of large focal lengths Both the objective and eyepiece should be of smaller lengths The objective should be small focal length and eyepiece should be of large focal length
6 If tube length of astronomical telescope is 105 cm and magnifying power is 20 for normal setting. Calculate the focal length of objective 100 cm 10 cm 20 cm 25 cm
7 A planet is observed by an astronomical refracting telescope having an objective of focal length 16 m and an eyepiece of focal length 2 cm. The distance between the objective and the eyepiece is 8 m The angular magnification of the planet is 200 The image of the planet is inverted The objective is smaller than the eyepiece
8 A lens behaves as a converging lens in air and a diverging lens in water. The refractive index of the material is Equal to unity Equal to 1.33 Between unity and 1.33 Greater than 1.33
9 An object is placed at a distance of f/2 from a convex lens. The image will be At one of the foci, virtual and double its size At, 3f/2, real and inverted At 2f, virtual and erect At f, real and inverted
10 When the length of a microscope tube increases, its magnifying power Decreases Increases May increases or decreases depending on the observer and the place of observation Does not change
11 When the length of a microscope tube increase, its magnifying power Decreases Increases Does not Change May increase or decrease depending on the observer and the place of observation
12 A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen Half the image will disappear No change either in size or in intensity Intensity of image will increase Intensity of the image will decrease
13 A fly is sitting on the objective of a telescope pointed towards the moon.
What effect is expected on the photography of the moon taken through the telescope?
 The entire of view blocked There is an image of the fly on the photography There is no effect at all There is a reduction in the intensity of the image
14 Huygen's wave theory of light cannot explain Diffraction Interference Polarization Photoelectric effect
15 The contrast in the fringes in any interference pattern depends on Fringe width Intensity ratio of the sources Distance between the slits Wavelength
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