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Friday, 20 November 2015

Physics Questions And Answers For Competitive Exams 2

15. Which vitamin is abundant in citrus fruits?  
A.  Vitamin A
B.  Vitamin B
C.  Vitamin C
D.  Vitamin D

16. Which of the following physical quantities have the same dimensions?
 a. Angular momentum and work
 b. Work and Torque
 c. Potential energy, linear momentum
 d. Kinetic energy, velocity

17. The change of a solid into vapour directly is called:
a. vaporization 
b. freezing 
c. melting 
d. sublimation

18.Which of the following measurements is not a unit of distance?  
A.  Ammeter
B.  Cubit
C.  Parsec
D.  angstrom

19. Ampere is the Unit of :
a. Current electricity 
b. magnetic field 
c. electric charge 
d. resistance

20. The focal length of the lens in a photographic camera is 5 cm. What is the power of the lens ?
a. +5 D 
b.+10 D 
c.+ 15 D 
d.+ 20 D

21. When the frequency distribution is normal:
a. median mode and onean are all different from one another 
b. mean mode and median are identical 
c. mean is greater than mode 
d.mean is greater than median

22. Water is a _____________ Conductor of electricity.  
A.  super conductor
B.  bad conductor
C.  speed conductor
D.  None of these

23. Alexander Graham Bell invented
a. Telephone
b. Telescope
T. elevision
d. Tank

24. Which of the following is not a vector quantity?
 a. Speed
 b. Velocity
 c.  torque
 d.  displacement


25. A hollow sphere of radius R, a hollow cube of side R and thin circular plate of radius R made up of the some material are all heated to 20 degree C above room temperature. When left to cool in the room, which of them will reach the room temperature first ? 
a. Circular plate 
b. cube 
c. sphere 
d. all of them will reach the room temperature at the same time 


26. The Central Arid Zone Research Institute (CAZRI) is located at  
A.  Jaipur
B.  Jodhpur
C.  Jaisalmer
D.  Jallandhar


27. What is the SI unit of pressure:
a.Pascal 
b.Dyne 
c.Newton 
d.Jule


28.The image formed on the retina of a human eye is
a. virtual and inverted 
b. virtual and erect 
c. real and erect
d. real ad inverted 



                                       Answers:


15. Answer : C.  Vitamin C

16. Ans. B

17. Work and Torque
Work is the measure of a quantity that is capable of accomplishing Macroscopic Motion of a System due to the action of a Force over a Distance. Torque is the tendency of a force to rotate an object about an axis, fulcrum, or pivot.

18. Answer: >sublimation

19. Answer : A.  Ammeter

20. Answer: >Current electricity

21. Answer: + 20 D

22. Answer: >mean mode and median are identical

23. Answer : B.  bad conductor

24. Answer: Option A
Explanation:
Alexander Graham Bell of USA invented Telephone in 1876,
Telescope was invented by Hans Lippershey of Netherlands in 1608,
Television was invented by John Logie Bared of Scotland in 1926,
Tank was invented by Sir Ernest Swington of England in 1914.

24. Ans. A
Speed: The speed of an object is the magnitude of its velocity (the rate of change of its position).

25. Answer: sphere 

26. Answer : B.  Jodhpur

27. Answer: Pascal

28. Answer: real ad inverted 



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