166. In order to double the period of a simple pendulum

1. 1. Its length should be doubled

   
   
   

   2. Its length should be quadrupled

   
   
   

   3. The mass of its bob should be doubled

   
   
   

   4. The mass of its bob should be quadrupled

   
   
   

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   N/A

   Correct Option: B

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167. Which of the following statements is true?

1. 1. g is less at the earth's surface than at a height above or at a depth below it

   
   
   

   2. g is the same at all places on the surface of the earth

   
   
   

   3. g has its maximum value at the equator

   
   
   

   4. g is greater at the poles that at the equator

   
   
   

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   N/A

   Correct Option: D

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168. A satellite revolves around the earth in elliptic orbit, its speed is

1. 1. Same at all points on the orbit

   
   
   

   2. Greatest when it is farthest from the earth

   
   
   

   3. Greatest when it is closest to the earth

   
   
   

   4. None of the above

   
   
   

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   N/A

   Correct Option: C

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169. Select the only correct statement from the following

1. 1. The orbital velocity of a satellite increases with the radius of the orbit

   
   
   

   2. Escape velocity of a particle from the surface of earth depends on the speed with it is fired

   
   
   

   3. The time period of a satellite does not depend on the radius of the orbit

   
   
   

   4. The orbital velocity is inversely proportional to the square root of the radius of the orbit

   
   
   

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   N/A

   Correct Option: D

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170. Consider the following statements
     Assertion (A) : A table cloth can be pulled from a table without dislodging the dishes.
     Reason (R) : To every action there is an equal and opposite reaction.
     Codes

1. 1. Both A and R are true and R is the correct explanation of A

   
   
   

   2. Both A and R are true but R is not the correct explanation of A

   
   
   

   3. A is true but R is false

   
   
   

   4. A is false but R is true

   
   
   

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1. View Hint View Answer Discuss in Forum

   N/A

   Correct Option: D

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