Home
Class 12
PHYSICS
The external and internal diameters of a...

The external and internal diameters of a hollow cylinder are measured to be `(4.23+-0.01)` cm and `(3.89+-0.01)`cm. The thickness of the wall of the cylinder is

Text Solution

Verified by Experts

The correct Answer is:
`9.30`
`E_(x)=E_(0)+2E_(0) cos 30^(@)+2E_(0) cos 60^(@)=(2+sqrt(3))E_(0)`
`E_(y)=E_(0), tan theta=E_(y)/E_(x)=1/(2+sqrt(3))xx2-sqrt(3), theta=15^(@)`
The hour hand will point towards `9:30`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

The external and internal diameters of a hollow cylinder are measured to be (4.23+-0.01) cm and (3.89+-0.01) cm. The thickne of the wall of the cylinder is

The internal and external diameters of a hollow cylinder are measured with the help of a Vernier callipers . Their values are 4.23 +- 0.01 cm and 3.87 +- 0.01 cm , respectively . The thickness of the wall of the cylinder is

The internal and external diameters of a hollow cylinder are measured with the help of a Vernier callipers . Their values are 4.23 +- 0.01 cm and 3.87 +- 0.01 cm , respectively . The thickness of the wall of the cylinder is

The internal and external diameters of a hollow hemispherical vessel are 21 cm and 28 cm respectively. Find : volume of material of the vessel.

The diameter and height of a cyliner are measured by a meter scale to be 12.6 -+ 0.1 cm and 34.2 -+ 0.1 cm , respectively. What will be the value of its volume in appropriate significant figure ?

The external and internal radii of a hollow cylinder are 5 cm and 4 cm respectively. If the height of cylinder is 14 cm, then find its internal volume and total surface area.

The internal and external diameters of a hollow hemispherical vessel are 21 cm and 28 cm respectively. Find : external curved surface area,

The internal and external diameters of a hollow hemispherical vessel are 21 cm and 28 cm respectively. Find : internal curved surface area,

The internal and external diameters of a hollow hemispherical vessel are 21 cm and 28 cm respectively. Find : total surface area,

The length and the radius of a cylinder measured with a slide cllipers re found to be 4.54 cm and 1.75 cm respectively. Calculate the volume of the cylinder.

ALLEN-BASIC MATHS-Exersice-04[A]
  1. In an experiment, the period of oscillation of a simple pendulum was o...

    Text Solution

    |

  2. The resistance R = V//i, where V = 100 +- 5 V and I = 10+- 0.2 A. What...

    Text Solution

    |

  3. The length, breadth and thickness of a strip are (10.0 pm 0.1) cm.(1.0...

    Text Solution

    |

  4. If error in measuring diameter of a circle is 4 %, the error in the ra...

    Text Solution

    |

  5. The external and internal diameters of a hollow cylinder are measured ...

    Text Solution

    |

  6. Percentage error in measuring the radius and mass of a solid sphere a...

    Text Solution

    |

  7. In a vernier callipers N divisions of vernier scale coincide with N-1 ...

    Text Solution

    |

  8. The length of cylinder is measured with a metre rod having least count...

    Text Solution

    |

  9. A vernier callipers has divisions on the vernier scale which coincide ...

    Text Solution

    |

  10. The heat generated in a circuit is dependent upon the resistance, cur...

    Text Solution

    |

  11. Percentage erros in the measurement of mass and speed are 2% and 3% re...

    Text Solution

    |

  12. 1 cm on the main scale of a vernier callipers is divided into 10 equal...

    Text Solution

    |

  13. While measuring the acceleration due to gravity by a simple pendulum ,...

    Text Solution

    |

  14. A student measured the diameter of a wire using a screw gauge with lea...

    Text Solution

    |

  15. Find (dy)/(dx) for the following : (i) y=x^(7//2)

    Text Solution

    |

  16. Given s=t^(2)+8t+9, find (ds)/(dt)

    Text Solution

    |

  17. If s= ut +(1)/(2) at^(2), where u and a are constants. Obtain the valu...

    Text Solution

    |

  18. The area of a blot of ink is growing such that after t seconds, its ar...

    Text Solution

    |

  19. The area of a circle is given by A=pir^(2), where r is the radius . Ca...

    Text Solution

    |

  20. Obtain the differential coefficient of the following : (i) (x-1) (2x...

    Text Solution

    |