Home
Class 12
PHYSICS
Solve the previous problem if the paperw...

Solve the previous problem if the paperweight is inverted at its place so that the spherical surface touches the paper

Text Solution

Verified by Experts

The correct Answer is:
A, C
Here `, r=oo, u=-cm`
`mu_1=3/2, mu_2=1`
`v=?`
`1/v+3/(2xx3)=(mu_2-mu_1)/alpha` ltbr? `v=-2`
so, shift `=3-2=1cm from paper
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Two non-conducting hemispherical surface, which are having uniform charges density sigma are placed on smooth horizontal surface as shown in figure. Assuming springs are ideal, calculate comparession in each spring both the hemispherical surface are just touching each other

A toy is made in the form of hemisphere sumounted by a right cone whose circular base is joined with the plane surface of the hemisphere . The radius of the base of the cone is 7 cm and its volume is 3/2 of the hemisphere . Calculate the height of the cone and the surface area of the toy correct to 2 places of decimal (Take pi= 3 1/7 )

A man of mass m starts falling towards a planet of mass M and radius R. As he reaches near to the surface realizes that he will pass through a small hole in the planet. As he enters the hole he seen that the planet really made of two places a spherical shell of negligible thickness of mass (2M)/(3) and a point mass (M)/(3) of centre. Change in the force of gravity experienced by the man is

A fixed thermally conducting cylinder has a radius R and height L_0 . The cylinder is open at its bottom and has a small hole at its top. A piston of mass M is held at a distance L from the top surface, as shown in the figure. The atmospheric pressure is P_0 . The piston is taken completely out of the cylinder. The hole at the top is sealed. A water tank is brought below the cylinder and put in a position so that the water surface in the tank is at the same level as the top of the cylinder as shown in the figure. The density of the water is rho . In equilibrium, the height H of the water coulmn in the cylinder satisfies

A cylindrical bar magnet is rotated about its axis as in figure. A wire is connected from the axis and is made to touch the cylindrical surface through a contact. Then

Three identical metal balls, each of the radius r are placed touching each other on a horizontal surface such that an equilateral triangle is formed when centre of three balls are joined. Then where does their centre of mass?

Point source of light is placed 4 m below water surface in the medium (water) having refractive index 5/3 . A disc is placed on the water surface such that it blocks the light coming out of water completely so minimum diameter of disc = ...........

A metallic spherical shell has an inner radius R j and outer radius R_2 . A charge Q is placed at the centre of the spherical cavity. What will be surface charge density on (i) the inner surface, and (ii) the outer surface ?

Shown in the figure a spherical shell with an inner radius 'a' and an outer radius 'b' is made of conducting metarial. A charge +Q is placed at the centre of the spherical shell and a total charge -q s placed on the shell. Charge -q is districuted on the surfaces as :

HC VERMA-GEOMETRICAL OPTICS-Exercises
  1. One end of a cylindrical glass rod (mu = 1.5) of radius 1.0 cm is roun...

    Text Solution

    |

  2. A paperweight in the form of a hemisphere of radius 3.0 cm is used to ...

    Text Solution

    |

  3. Solve the previous problem if the paperweight is inverted at its place...

    Text Solution

    |

  4. A hemispherical portion of the surface of a solid glass sphere (mu = 1...

    Text Solution

    |

  5. The convex surface of a thin concave-convex lens of glass of refractiv...

    Text Solution

    |

  6. A double convex lens has focal length 25 cm. The radius of curvature o...

    Text Solution

    |

  7. The radii of curvature of a lens are + 20 cm and + 30 cm. The material...

    Text Solution

    |

  8. Lenses are constructed by a material of refractive indeic 1.50. The ma...

    Text Solution

    |

  9. A thin lens made of a material of refractive indexmu2 has a medium of ...

    Text Solution

    |

  10. A convex lens has a focal length of 10 cm. Find the location and natur...

    Text Solution

    |

  11. A slide projector has to project a 35 mm slide (35 mm xx 23 mm) on a 2...

    Text Solution

    |

  12. A particle executes a simple harmonic motion of amplitude 1.0 cm along...

    Text Solution

    |

  13. An extended object is placed at a distance of 5.0 cm from a convex len...

    Text Solution

    |

  14. A pin of length 2.00 cm is placed perpendicular to the principal axis ...

    Text Solution

    |

  15. A convex lens produces a double size real image when an object is plac...

    Text Solution

    |

  16. A pin of length 2.0 cm lies along the principal axis of a converging l...

    Text Solution

    |

  17. The diameter of the sun is 1.4 x 10^9 m and its distance from the eart...

    Text Solution

    |

  18. A 5.0 diopter lens forms a virtual image which is 4 times the object p...

    Text Solution

    |

  19. A diverging lens of focal length 12 cm and a converging mirror of foca...

    Text Solution

    |

  20. A converging lens of focal length 12 cm and a diverging mirror of foca...

    Text Solution

    |