Physics for Defence Warriors set 3 ( NDA / CDS / AFCAT )

• 0 Questions answered correctly
• 0 Questions answered incorrect
• 15 Questions unattempted

• 1

  1. 1 nm is equivalent to

  A.
  B.
  C.
  D. 0.01 mm

  • A

    A

  • B

    B

  • C

    C

  • D

    D

  Explanation

  

• 2

  2. 1 nanometre is equal to

  

  • A

    A

  • B

    B

  • C

    C

  • D

    D

  Explanation

  

• 3

  3. How much is one barrel of oil approximately equal to?

  • A

    A. 131 L

  • B

    B. 159 L

  • C

    C. 257 L

  • D

    D. 321 L

  Explanation

  One barrel of oil is approximately equal to 159" " L(≈158.98" " L). A barrel is one amongst the several units of volume, which is most commonly used for measuring crude oil. The Barrel of Oil Equivalent (BOE) is a unit of energy based on the approximate energy released by burning one barrel ( 42 US gallons or 158.98 L ) of crude oil.

• 4

  4. Which unit of measurement is multiplied by 0.39 to convert it to 'inches'?

  • A

    A. Millimetre
     

  • B

    B. Centimetre
     

  • C

    C. Metre
     

  • D

    D. Decimetre

  Explanation

  

• 5

  5. How can the height of a person who is six feet tall, be expressed (approximately) in nm ?

  

  • A

    A.

  • B

    B.

  • C

    C.

  • D

    D.

  Explanation

  

• 6

  6. Light year is the unit of

  • A

    A. distance

  • B

    B. time
     

  • C

    C. energy
     

  • D

    D. intensity of light

  Explanation

  

• 7

  7. A parsec, a unit of distance used to measure the distance related to the stars in the sky, is equal to

  • A

    A. 4.25 light years
     

  • B

    B. 3.25 light years
     

  • C

    C. 4.50 light years
     

  • D

    D. 3.05 light years

  Explanation

  

• 8

  8. Which one of the following is not correctly matched ?

  

  • A

    A.

  • B

    B.

  • C

    C.

  • D

    D.

  Explanation

  

• 9

  9. Angstrom is a unit of

  

  • A

    A. 
     

  • B

    B. 
     

  • C

    C. 
     

  • D

    D. 
     

  Explanation

  

• 10

  10. Light year is

  • A

    A. light emitted by sun in one year
     

  • B

    B. time taken by light to travel from sun to earth
     

  • C

    C. the distance travelled by light in free space in 1 year
     

  • D

    D. time taken by earth to go once around the sun

  Explanation

  

• 11

  11. Which one of the following is a reason why astronomical distances are measured in light years?

  • A

    A. Distances among stellar bodies do not change
     

  • B

    B. Gravity of stellar bodies does not change
     

  • C

    C. Light always travels in straight line
     

  • D

    D. Speed of light is always same

  Explanation

  

• 12

  12. Which of the following is not a unit of distance? 

  • A

    A. Light year
     

  • B

    B. Parsec
     

  • C

    C. Furlong
     

  • D

    D. Jiffy

  Explanation

  

• 13

  13. Parsec is the unit of

  • A

    A. distance
     

  • B

    B. time
     

  • C

    C. light intensity
     

  • D

    D. magnetic force

  Explanation

  

• 14

  14. How many watts are in one horse power?

  • A

    A. 1000
     

  • B

    B. 750
     

  • C

    C. 746
     

  • D

    D. 748

  Explanation

  

• 15

  

  • A

    A.

  • B

    B.

  • C

    C.

  • D

    D.

  Explanation