Home
Class 12
PHYSICS
(A): All physically correct equations ar...

(A): All physically correct equations are dimensionally correct.
(R): All dimensionally correct equations are physically correct.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • UNITS AND MEASUREMENTS

    AAKASH SERIES|Exercise EXERCISE -2|56 Videos
  • UNITS AND MEASUREMENTS

    AAKASH SERIES|Exercise EXERCISE -3|66 Videos
  • UNITS AND MEASUREMENTS

    AAKASH SERIES|Exercise EXERCISE -1 A|187 Videos
  • UNITS AND MEASUREMENT

    AAKASH SERIES|Exercise PRACTICE EXERCISE|45 Videos
  • WAVE MOTION

    AAKASH SERIES|Exercise PRACTICE SHEET ADVANCED (INTEGER TYPE QUESTIONS)|10 Videos

Similar Questions

Explore conceptually related problems

The dimensionally correct formula is

Given that T stands for time period nd 1 stands for the length of simple pendulum. If g is the acceleration due to gravity, then which of the following statements about the relation T^(2)=(l)/(g) is correct ? (I) It is correct both dimensionally as well unmerically (II) It is neither dimensionally correct nor numerically (III) It is dimensionally correct but not numerically (IV) It is numerically correct but not dimensionally

When metal carbides react with H_(2)O , the correct equations are

The Correct equation of photosynthesis is

A circular railway track of radius r is banked at angle theta so that a train moving with speed v can safely go round the track. A student writes: tan theta =rg//v^(2) . Why this relation is not correct? (i) Equality of dimensions does not guarantee correctness of the relation . (ii) Dimensionally correct relation may not be numerically correct. iii) The relation is dimensionally incorrect.

AAKASH SERIES-UNITS AND MEASUREMENTS-EXERCISE- 1 B
  1. (A): Higher is the accuracy of measurement,if instrument have smaller ...

    Text Solution

    |

  2. (A) : The maximum possible error in a reading is taken as least count ...

    Text Solution

    |

  3. (A) : In a measurement, two readings obtai- ned are 10.001 and 10.0001...

    Text Solution

    |

  4. (A): Out of the measurements A = 10.00 and B = 10.000 B is more accura...

    Text Solution

    |

  5. (A): All physically correct equations are dimensionally correct. (R...

    Text Solution

    |

  6. (A): Physical relations involving addition and subtraction cannot be d...

    Text Solution

    |

  7. (A) : An exact number has infinite number of significant digits. (R...

    Text Solution

    |

  8. (A): A dimensionless quantity may have unit. (R) : Two physical quan...

    Text Solution

    |

  9. If x=(a^m.b^(n))/(c^(p).d^(q)) then the percentages error in the meas...

    Text Solution

    |

  10. (A) : Dimensionless quantities have no units. (R): Unitless quantit...

    Text Solution

    |

  11. (A): Ampere is a standard unit of electric current. (R): It is indep...

    Text Solution

    |

  12. (A): The distance of a star from earth can be measured by parallax met...

    Text Solution

    |

  13. (A) : A unitless quantity cannot have a dimensional formula. (R): A...

    Text Solution

    |

  14. (A): A measurement which is less accurate is more precise. (R): Prec...

    Text Solution

    |

  15. (A): Systametic errors are due to a definite cause and can be minimise...

    Text Solution

    |

  16. (A): When an algebraic equation has been derived, it is advisible to c...

    Text Solution

    |

  17. (A): The order of accuracy of a measurement depends on the least count...

    Text Solution

    |

  18. (A): The method of dimensions cannot be used to obtain the dependence ...

    Text Solution

    |

  19. (A) : Mass, Volume and time may be taken as fundamental quantities in ...

    Text Solution

    |

  20. (A): The method of dimensions cannot be used to derive the formula N=N...

    Text Solution

    |