1 ) If the water fall from a dam to turbine wheel 19.6 m below , then velocity of water at turbine is ? A ) 11.8 m/s , B ) 15.0 m/s , C ) 19.6 m/s , D ) None of these ,

1 ) If the water fall from a dam to turbine wheel 19.6 m below , then velocity of water at turbine is ?

A ) 11.8 m/s  ,                                                  B ) 15.0 m/s  , 

C ) 19.6 m/s  ,                                                  D ) None of these ,

Correct Answer : -  C ) 19.6 m/s  ,

Solution : -

Formula : -

v = √(2gh) =  √(2 x 9.8 x 19.6) = 19.6 m/s  ,  Answer .

 

2 ) As Beroulli's equation , pressure is . . . . . . . . . . . . . . to the velocity .

A ) directly proportional ,                                        

B ) inversely proportional ,

C ) equal to ,                                           

D ) None of these ,

Correct Answer : -  B ) inversely proportional ,

 

3 )Two pipes if radius of 2 cm and 4 cm , the ratio of velocity ,  V1 / V2  =  ?

A ) 2 , B ) 4 ,

C ) 8 , D ) None of these ,

Correct Answer : -  B ) 4 ,

Solution : -

4 ) A Beam of light travel to rare medium from denser medium , then it suffers phase angle of : - 

A ) 90 degree ,                                        B ) 180 degree ,

C ) 270 degree ,                                              D ) None of these ,

Correct Answer : -   B ) 180 degree ,

 

5 ) Density of water is . . . . . . . . . ( 997 kg / m³ or 1000 kg / m³ ) .

 

6 ) A stone I release from train , so it will follow . . . . . . . . ( projectile motion ) and hit the ground .

 

7 ) To hear echo the minimum distance of reflecting surface must be : -   17.2 m ,

8 ) Escape velocity of earth is ...... 11.2  km / s .

 

9 ) The time period of particle in SHM is 8 sec. At   t = 0  , it is at mean position  , the ratio of distance traveled at first and 2nd second is . . . . . . . . . . . . . . . .  ?

Solution : -

Now go to online quiz section and Physics Quiz 9 is uploaded related to these mcqs  , so check your preparation by this link : -

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