Home
Class 11
PHYSICS
Find the dimensional formula of (a) ...

Find the dimensional formula of
(a) coefficient of viscosity `eta` (b)charge `q`
(c ) potention `V` (d) capacitance `C` and
( e) resistance `R`
Some of the equations containing these quantities are
`F= -etaA [[Delta v )/(Delta l]], q = It. U = VIt, q = CV and V = IR `
where A denotes Area, the v the velocity , I is the length ,I the electric current, t the time and U the energy .

Text Solution

Verified by Experts

(i) `mu=(F)/(A)(Deltal)/(Deltav)`
`therefore` `[eta]=([F])/([A])([l])/([v])=([MLT^(-2)][L])/([L^(2)][LT^(-1)])=[ML^(-1)T^(-1)]`
(ii) `q=It`
`therefore` `[q]=[I][t]=[AT]`
(iii) `U=Vit`
`therefore` `V=(U)/(It)`
or `[V]=([U])/([I][t])=([ML^(2)T^(-2)])/([A][T])=[ML^(2)T^(-3)A^(-1)]`
(iv) `q=CV`
`C=(q)/(V)`
or `therefore` `[C]=([q])/([V])=-([AT])/([ML^(2)T^(-3)A^(-1)])=[M^(-1)L^(-2)T^(-4)A^(-2)]`
(v) `V=IR`
`therefore` `R=(V)/(I)`
or `[R]=([V])/([I])=([ML^(2)T^(-3)A^(-1)])/([A])=[ML^(2)T^(-3)A^(-2)]`
Promotional Banner

Topper's Solved these Questions

  • UNITS, DIMENSIONS & ERROR ANALYSIS

    DC PANDEY|Exercise Check Point 1.1|25 Videos
  • UNITS, DIMENSIONS & ERROR ANALYSIS

    DC PANDEY|Exercise Check Point 1.2|10 Videos
  • UNIT AND DIMENSIONS

    DC PANDEY|Exercise Assertion And Reason|2 Videos
  • VECTORS

    DC PANDEY|Exercise Medical enrances gallery|9 Videos
DC PANDEY-UNITS, DIMENSIONS & ERROR ANALYSIS -Medical entrances gallery
  1. Find the dimensional formula of (a) coefficient of viscosity eta ...

    Text Solution

    |

  2. Force F is given in terms of time t and distance x by F = A sin Ct + B...

    Text Solution

    |

  3. The scalar quantity among the following is

    Text Solution

    |

  4. The wrong units conversion among the following is

    Text Solution

    |

  5. The mass of the liquid flowing per second per unit area of cross-secti...

    Text Solution

    |

  6. The ratio of the dimensions of Planck's constant and that of moment of...

    Text Solution

    |

  7. In terms of basic units of mass (M), length (L), time (T), and charge ...

    Text Solution

    |

  8. The dimensional formula of electric flux is

    Text Solution

    |

  9. If energy (E ) , velocity (V) and time (T) are chosen as the fundament...

    Text Solution

    |

  10. Match the following two columns. {:(,"Column I",,"Column II"),("A.",...

    Text Solution

    |

  11. The unit of three physical quantities x, y and z are g cm^(2) s^(-5), ...

    Text Solution

    |

  12. The unit of universal gas constant is

    Text Solution

    |

  13. Unit of emf is

    Text Solution

    |

  14. The dimensional formula for Reynold's number is

    Text Solution

    |

  15. The relation between force F and density d is F=(x)/(sqrt(d)). The d...

    Text Solution

    |

  16. In which of the following pairs, the two physical quantities have diff...

    Text Solution

    |

  17. If the absoulte errors in two physical quantites A and B are a and b r...

    Text Solution

    |

  18. If force (F), velocity (V) and time (T) are taken as fundamental units...

    Text Solution

    |

  19. If the unit of force is 1 kN, unit of length 1 km and unit of time is ...

    Text Solution

    |

  20. The dimensional formula of magnetic flux density is :

    Text Solution

    |

  21. The dimensional formula for electric field is

    Text Solution

    |