Home
Class 11
PHYSICS
If the unit of length is doubled and tha...

If the unit of length is doubled and that of mass and time is halved, the unit of energy will be

A

doubled

B

4 times

C

8 times

D

same

Text Solution

Verified by Experts

The correct Answer is:
C
`(E_(2))/(E_(1)) = (M_(2))/(M_(1)) ((L_(2))/(L_(1)))^(2) ((T_(2))/(T_(1)))^(-2)`
Promotional Banner

Topper's Solved these Questions

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise LEVEL-II (C.W)|28 Videos

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise LEVEL-III|21 Videos

  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise C.U.Q|183 Videos

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL-II(C.W)|27 Videos

  • VECTORS

    NARAYNA|Exercise LEVEL-II (H.W)|14 Videos

Similar Questions

Explore conceptually related problems

The unit of the force is kg ms^(-2) . If the unit of length is halved and that of mass is doubled, then the unit of force will

If the unit of length is micrometer and the unit of time is microsecond, the unit of velcoity will be :

If the magnitude of length is halved and that of mass is double then dimension of force is

If the unit of length and force each becomes four times, then the unit of energy becomes

The power of a motor is 200W .If the unit of length is halved that of mass is doubled and that of time is also doubled the power of the motor in the new system is

In a practical unit if the unit of mass becomes double and that of unit of time becomes half, then 8 joule will be equal to _________ unit of work.

If the units of length and force are increased by four times the unit of energy will be incresed by

If the units of length and force be increased three times, show that the unit of energy is increased nine times.

Suppose we employ a system in which in which the unit of mass equals 100 kg , the unit of length equals 1 km and the unit of time 100 s and call the unit of energy eluoj ( joule written in reverse order), then what is the relation between eluoj and joule?

NARAYNA-UNITS AND MEASUREMENTS-LEVEL-I (C.W)
  1. The value of pi//53.2 with due regard to singificant figures is,

    Text Solution

    |

  2. By rounding off, (a) 20.96 and (b) 0.0003125 to 3 significant figures ...

    Text Solution

    |

  3. If the unit of length is doubled and that of mass and time is halved, ...

    Text Solution

    |

  4. Given M is the mass suspended from a spring of force constant. k.The d...

    Text Solution

    |

  5. The dimensionla formula for the product of two physical quantities P a...

    Text Solution

    |

  6. The fundamental physical quantites quanties that have same dimension i...

    Text Solution

    |

  7. The physical quantity which was the dimensional formula as that of ("...

    Text Solution

    |

  8. If J and E represent the angualr momentum and rotational kinetic energ...

    Text Solution

    |

  9. If the fundamental units of length, mass and time are doubled, the uni...

    Text Solution

    |

  10. mu = A + (B)/(lambda) + (C)/(lambda^(2)) si dimensionally correct. The...

    Text Solution

    |

  11. According to Bernoulli's theorem (p)/(d) + (v^(2))/(2) + gh = constan...

    Text Solution

    |

  12. The surface tension of a liquid in CGS system is 45 dyne cm^(-1). Its ...

    Text Solution

    |

  13. If minutes is the unit of time. 10ms^(-2) is the unit of acceleration ...

    Text Solution

    |

  14. The magnitude of force is 100 N. What will be its value if the units o...

    Text Solution

    |

  15. A motor pumps water at the rate of V m^(3) per second, against a press...

    Text Solution

    |

  16. If the units of length and force are increased by four times the unit...

    Text Solution

    |

  17. SI unit and CGS unit of quantity vary by 10^(3) times, it is:

    Text Solution

    |

  18. The value fo universal gravitationla constant G in CGS system is 6.67x...

    Text Solution

    |

  19. The final velocity fo a particles falling freelly under graavity is g...

    Text Solution

    |

  20. The equaction which is dimensionally correct among the following is

    Text Solution

    |