Nat Review Physics

Topics: Energy, Potential energy, Light Pages: 13 (3279 words) Published: February 27, 2013
In an experiment, the potential and K.E. of a 10kg object were measured at different heights. Mass| Height| P.E.| K.E.| P.E. +K.E.|
10| 2.0| 196| 0| 196|
10| 1.0| 98| 98| 196|
10| 0.5| 49| 147| 196|
10| 0| 0| 196| 196|

1. Which statement BEST describes the data in the table?
The total energy of an object ____
a. Increase height
b. Decreases with height
c. Is constant at different heights
d. Is affected by the mass of the object
2. Based on the equation E=mc² where c is the speed of light, what can be inferred on the amount of energy possessed by the object? a. The energy is directly proportional to the mass of the object. b. The energy is inversely proportional to the mass of the object. c. The energy does not depend on the mass of the object.

d. The energy is twice greater than the mass of the object. 3. In Fig. 1,2,3, line AB represents different types of mirrors
O I O I O I 1 2 3 Which among the Fig. is/are using convex mirror?

a. Fig. 1,2 and 3
b. Fig. 2 and 3
c. Fig. 1 only
d. Fig. 3 only
4. Why does the pencil appear broken at the boundary between air and water as viewed from the side of glass water? a. The speed of light is in air and H2O is not affected when it passes the glass b. The speed of light in air and water is the same.

c. Light travels slower in air than water.
d. Light travels faster in air than in water.
5. If the diaphragm if a camera and the iris of the eye were having same function would they have?s a. Block the passage of light.
b. Regulate the amount of light.
c. Form the image of an object.
d. Enlarge the image of an object.
6. What function do the retina of the eye and the film of the camera have in common? a. Permit light to enter the eye.
b. Enlarge the image received.
c. Receive the image of an object.
d. Regulate the amount of light that enters the eye.
7. A farsighted person can only see clearly and sharply objects that are distant but not near objects where is the image of the near object that he is seeing formed? a. Behind the retina.
b. In front of the retina.
c. At the side of the retina.
d. On the surface of the retina.
8. What lens could correct the image formed by a nearsighted person? a. Polaroid glass that eliminate the glare of light.
b. Bifocal glasses with two lenses that ensure clarity of the image. c. A diverging or concave lens that spread the light rays before they enter the eye. d. A converging or convex lens that bends the light rays towards each other a little before they enter the eye. 9. Which of the ff. situations apply the property of total internal reflection of light? a. The glitters of a diamond right.

b. The appearance of a fish underwater.
c. The image of an object seen in the mirror.
d. The appearance of rainbow after a rain slower.
10. How will the image of the word PEN appear when placed in front of a plain mirror? a. b. c. d.
11. Which of the ff illustrates the correct patch of the light ray shining on the surface if the tank filled with H2O at an angle? 12. The ff. diagrams illustrate electromagnetic waves, which would be the gamma ray?

13. Which is the most ionizing among the ff. radiations?
a. X-ray
b. Gamma
c. Beta
d. Alpha
Refer to the illustration showing a single nuclear reaction
10n+23892U 9236Kr + 14152Ba + 310n

14. What started the nuclear reaction to occur?
a. The splitting of uranium.
b. The...
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