Physics Questions And Answers

126.Cooking taken longest time
a. the sea level
b. Simla
c. Mount Everest
d. None of these

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Ans. C
At Mount Everest
Everest is 8.848 kilometers tall, the highest elevation above sea level, the lower the air pressure.
That's because there's less air above you pushing down. When air pressure is lower, it's easier for water to boil--to change from liquid to gas. So as you go up a mountain, the temperature needed to make the water boil is lower. The other factor is that once water is boiling, it doesn't get any hotter. All the extra energy going into the boiling water is being used to change the liquid into gas.


127. What does Displacement refer to?
a. It refers to how much ground an object has covered
b. It refers to how far out of place an object is
c. It refers to how fast an object is moving
d. It refers to the rate at which an object changes its position

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ANSWER: b. It refers to how far out of place an object is


128. Name the barometer which does not contain a liquid: 
a. Aneroid barometer
b. Fortin's barometer
c. Mercury barometer
d. Barostat

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ANSWER: a. Aneroid barometer



128. Speed is _____
a. Scalar quantity which does not keep track of direction
b. Scalar quantity which keeps track of direction
c. Vector quantity which does not keep track of direction
d. None of above

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ANSWER: a. Scalar quantity which does not keep track of direction


129. Which of the following is similar to the solar system
a. Rutherford atom model
b. Dalton atom model
c. Thomson atom model
d. Prout atom model

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ANSWER : : Rutherford atom model


130. Zinc Oxide is  
A.  Acidic
B.  Basic
C.  Neutral
D.  Amphoteric

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Answer : D.  Amphoteric


131. Rate of change of displacement is called?
A. Speed                             
B. Work                                                
C. Force                                                
D. Velocity

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Answer. D


132. To correct his/her vision, a person suffering from short-sightedness will have to use -
1. Convex lens
2. Concave lens
3. Convex mirror
4. Bifocal Lens

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Ans: 2


133. Which instrument is used to measure depth of ocean ?
Galvanometer
Fluxmeter
Endoscope
Fathometer

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Answer: Option D


134.  What is the heaviest of the naturally occuring Noble gases?  
A.  Radon
B.  Xenon
C.  Helium
D.  Argon

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Answer : A.  Radon


135. Siphon will fail to work if
A. the densities of the liquid in the two vessels are equal
B. the level of the liquid in the two vessels are at the same height
C. both its limbs are of unequal length
D. the temperature of the liquids in the two vessels are the same

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Answer: B



136. Which one of the following remains constant while throwing a ball upward?  
A.  Displacement
B.  Kinectic energy
C.  Acceleration
D.  Velocity

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Answer : C.  Acceleration


137. In a freezer ice cubes will be formed more quickly in trays made of 
A. rubber
B. plastic
C. aluminium
D. wood

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Answer: C) aluminium 
Explanation:
Aluminium being a good conductor of heat conducts away the heat from the substance quite easily and causes quick freezing.



138. Which one of the following remains constant while throwing a ball upward?
A. velocity
B. displacement
C. acceleration
D. kinectic energy

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Answer: C. acceleration



139. A freely suspended magnet always aligns itself along the   Add Question to Review List
a. West South Axis
b. East West Axis
c. North South Axis 
d.East South Axis

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Answer: c. North South Axis

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